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Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

00491+5749 STF 60 AE

00^h 49^m 06.29^s +57° 48' 54.7" P.A. 126.00 sep 66.0 mag 3.52,10.15 Sp G0V dist. 5.95 pc (19.41 l.y.)

Coord 2000	00491+5749	Discov num	STF 60	Comp	AE	Coord arcsec 2000	00 49 06.29 +57 48 54.7
Date first	1856	Date last	2023	Obs	25
Pa first	118	Pa last	126.2	P.A. Now (θ)	126.2°
Sep first	276.2	Sep last	65.95	Sep. Now (ρ)	65.95"
Mag pri	3.52	Mag sec	10.15	delta mag (ΔM)	6.63	Spectral class	G0V (yellow)
Pri motion ra	+114	Sec motion ra	-000
Pri motion dec	-057	Sec motion dec	-000
Notes	N L P (See Notes, Linear solution, 100-year proper motion)

rPM=1

This double is not physical.

00491+5749 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		21732	00 49 06 +57 48 55	STF 60 Aa,Ab	2015	2	134	5.1	3.52
Show	Achird	21732	00 49 06 +57 48 55	STF 60 AB	2023	1087	328	13.5	3.52	7.36	3.84	Y
Show		21732	00 49 06 +57 48 55	STF 60 AC	2000	4	260	225.0	3.52	11.40	7.88
Show		21732	00 49 06 +57 48 55	STF 60 AD	2011	7	354	189.4	3.52	12.80	9.28
Show		21732	00 49 06 +57 48 55	STF 60 AE	2023	25	126	66.0	3.52	10.15	6.63		<===
Show		21732	00 49 06 +57 48 55	STF 60 AF	2000	3	276	378.3	3.52	11.53	8.01
Show		21732	00 49 06 +57 48 55	STF 60 AG	2012	19	259	419.7	3.52	9.53	6.01
Show		21732	00 49 06 +57 48 55	STF 60 AH	2012	4	355	701.1	3.52	8.41	4.89
Show		21732	00 49 06 +57 48 55	SMR 2 AI	2012	7	73	90.3	3.52	11.60	8.08
Show		21732	00 49 06 +57 48 55	SMR 2 AJ	2012	5	262	237.1	3.52	12.30	8.78
Show		21732	00 49 05 +57 49 04	STF 60 BC	2016	5	259	235.4	7.36	11.40	4.04
Show		21732	00 49 05 +57 49 04	STF 60 BD	2000	1	1	172.2	7.36	12.80	5.44
Show		21732	00 49 05 +57 49 04	STF 60 BE	2020	4	126	105.5	7.36	10.15	2.79
Show		21732	00 49 05 +57 49 04	STF 60 BF	2016	3	275	388.1	7.36	11.53	4.17
Show		21730	00 49 05 +57 49 04	STF 60 BG	2016	3	256	420.0	7.36	9.53	2.17
Show		21732	00 49 05 +57 49 04	STF 60 BH	2020	5	355	688.4	7.36	8.41	1.05
Show		21730	00 48 19 +57 49 34	STF 60 FG	2015	10	188	142.2	11.53	9.53	2.00

11-fold system
11 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Common name	Achird	Constellation	Cassiopeia	SAO	21732	HIP	3821
Tycho2	3663-02669-1	HD	4614	HR	219	GC	962
ADS	671	BD	BD+57 150	Bayer	Eta Cassiopeiae	Bayer name	Eta Cas
Flamsteed	24 Cassiopeiae	Flamsteed name	24 Cas	Distance	5.95	Distance ly	19.41
Bayer greek	η Cas

Other names

MARFAK

Meaning

first applied to ? Cassiopeiae in the Skalnate Pleso Atlas of the Heavens published in 1950, but is not known prior to that.

WDS 00491+5749 STF 60 AE : NOTES

discov_num	notes	refcode
STF 60	eta Cas = 24 Cas = Achird.
	Proper motion of A +1141 -572. PM of B = +1105 -493.
	A has been reported to be a	Dob1927
	spectroscopic binary, but this is not confirmed. Doberck, Pavel, and	Pav1914
	Harshaw measure attributed to BC, then later to BE, was actually to	Hsw2004
	another faint star; confusion was due to the high proper motion of the
	B component and the long time span since the previous measurement.
	Proper Motion of E -003-001, F -010+000, G +009-005, H -006-001
	System has been discussed by van de Kamp & Flather.	Kam1955
	AB: H 3 3.	MEv2010
	AB: Additional notes may be found in Simonov (1937).	Smw1937
	AB: Malkov et al. (2012) derive dynamical, photometric, and
	spectroscopic masses 1.58 +/- 0.85, 1.71, and 1.60 Msun, respectively.	Mlk2012
	AB: Raghavan et al. (2010) do not accept the astrometric sub-system as	Rag2010
	real.	Tok2014d
	CHARA Array Limb-darkened diameter 1.623 +/- 0.004 mas,	CIA2012e
	R = 1.039 +/- 0.004 \rsun, L = 1.252 +/-0.019 \lsun,
	Teff = 6003 +/- 24 K, M = 0.972 +/- 0.012 \msun,
	Age = 5.4 +/- 0.9 Gyr.
	AD: Rectilinear solution by Hurowitz et al. (2013).	USN2013a

REFERENCES

refcode	metd	author	reference
CIA2012e	not j	Boyajian, T.S., McAlister, H.A., van Belle, G., Gies, D.R., ten Brummelaar, T.A.,	2012ApJ...746..101B
CIA2012e		von Braun, K., Farrington, C., Goldfinger, P.J., O'Brien, D., Parks, J.R.,	.
CIA2012e		Richardson, N.D., Ridgway, S., Schaefer, G., Sturmann, L., Sturmann, J., Touhami,	.
CIA2012e		Y., Turner, N.H. & White, R.	.
CIA2012e		ApJ 746, 101, 2012	.
Dob1927	Ma -	Doberck, W.A.	1927QB821.D6.......
Dob1927	+Mb	Erganz. AN 7, 1927
Dob1927		(catalog of measures 1875-1927; includes nearly all measures from earlier papers)
Hsw2004	Pa j	Harshaw, R.	...................
Hsw2004		Webb Soc., Double Star Circ. 12, 2004
Kam1955	-	van de Kamp, P. & Flather, E.	1955AJ.....60..448V
Kam1955		AJ 60, 448, 1955
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Mlk2012	not -	Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A.	2012A&A...546A..69M
Mlk2012		A&A 546, A69, 2012
Pav1914	Ma j	Pavel, F.	1914AN....198..323P
Pav1914	+C	AN 198, 323, 1914
Rag2010	K -	Raghavan, D., McAlister, H.A., Henry, T.J., Latham, D.W., Marcy, G.W.,	2010ApJS..190....1R
Rag2010	+S	Mason, B.D., Gies, D.R., White, R.J. & ten Brummelaar, T.A.
Rag2010	+P	ApJS 190, 1, 2010
Smw1937	Ma -	Simonov, G.V.	1938VeBB....5.....S
Smw1937		Pub. Berlin Babelsberg Obs. 11, Pt.5, 1937
Tok2014d	E2 -	Tokovinin, A.	2014AJ....147...86T
Tok2014d		AJ 147, 86, 2014
USN2013a	lin -	Hurowitz, J.L., Hartkopf, W.I., & Mason, B.D.	2013IAUDS.181....1H
USN2013a		Inf. Circ. 181, 1, 2013

DISCOVERER

discov	author
CIA	Center for High Angular Resolution Astronomy (CHARA Interferometric Array)
CIA	McAlister, H.A., ten Brummelaar, T.A., Gies, D.R., Huang, W., Bagnuolo, Jr., W.G.,
CIA	Shure, M.A., Sturmann, J., Sturmann, L., Turner, N.H., Taylor, S.F., Berger, D.H.,
CIA	Baines, E.K., Grundstrom, E. & Ogden, C.
CIA	Berger, D.H., Gies, D.R., McAlister, H.A., ten Brummelaar, T.A., Henry, T.J.,
CIA	Sturmann, J., Sturmann, L., Turner, N.H., Ridgway, S.T., Aufdenberg, J.P. &
CIA	Di Holco, E., Absil, O., Augereau, J.-C., Merand, A., Coude du Foresto, V.,
CIA	Thevenin, F., Defrere, D., Kervella, P., ten Brummelaar, T.A., McAlister, H.A.,
CIA	Ridgway, S.T., Sturmann, J., Sturmann, L. & Turner, N.H.
CIA	Zhao, M., Gies, D., Monnier, J.D., Thureau, N., Pedretti, E., Baron, F.,
CIA	Merand, A., ten Brummelaar, T., McAlister, H., Ridgway, S.T., Turner, N.,
CIA	Sturmann, J., Sturmann, L., Farrington, C., & Goldfinger, P.J.
CIA	Baines, E.K., McAlister, H.A., ten Brummelaar, T.A., Turner, N.H., Sturmann, J.,
CIA	Sturmann, L., Goldfinger, P.J. & Ridgway, S.T.
CIA	Boyajian, T.S., McAlister, H.A., Baines, E.K., Gies, D.R., Henry, T., Jao, W.-C.,
CIA	O'Brien, D., Raghavan, D., Touhami, Y., ten Brummelaar, T.A., Farrington, C.,
CIA	Goldfinger, P.J., Sturmann, L., Sturmann, J., Turner, N.H. & Ridgway, S.
CIA	Kervella, P., Merand, A., Pichon, B., Thevenin, F., Heiter, U., Bigot, L.,
CIA	ten Brummelaar, T.A., McAlister, H.A., Ridgway, S.T., Turner, N., Sturmann, J.,
CIA	Sturmann, L., Goldfinger, P.J. & Farrington, C.
CIA	Baines, E.K., McAlister, H.A., ten Brummelaar, T.A., Sturmann, J., Sturmann, L.,
CIA	Turner, N.H. & Ridgway, S.T.
CIA	Boyajian, T.S., McAlister, H.A., Cantrell, J.R., Gies, D.R., ten Brummelaar, T.A.,
CIA	Farrington, C., Goldfinger, P.J., Sturmann, L., Sturmann, J., Turner, N.H. &
CIA	Farrington, C.D., ten Brummelaar, T.A., Mason, B.D., Hartkopf, W.I., McAlister,
CIA	H.A., Raghavan, D., Turner, N.H., Sturmann, L., Sturmann, J., & Ridgway, S.T.
CIA	Baines, E.K., Dollinger, M.P., Cusano, F., Guenther, E.W., Hatzes, A.P.,
CIA	McAlister, H.A., ten Brummelaar, T.A., Turner, N.H., Sturmann, J., Sturmann, L.,
CIA	Goldfinger, P.J., Farrington, C.D. & Ridgway, S.T.
CIA	ten Brummelaar, T.A., O'Brien, D.P., Mason, B.D., Farrington, C.D.,
CIA	Fullerton, A.W., Gies, D.R., Grundstrom, E.D., Hartkopf, W.I., et al.
CIA	O'Brien, D.P., McAlister, H.A., Raghavan, D., Boyajian, T.S.,
CIA	ten Brummelaar, T.A., Sturmann, J., Sturmann, L., Turner, N.H., & Ridgway, S.
CIA	Monnier, J.D., Zhao, M., Pedretti, E., Millan-Gabet, R., Berger, J.-P., Traub, W.,
CIA	Schloerb, F.P., ten Brummelaar, T., McAlister, H., Ridgway, S., Sturmann, L.,
CIA	Sturmann, J., et al.
CIA	Raghavan, D., Farrington, C.D., ten Brummelaar, T.A., McAlister, H.A.,
CIA	Ridgway, S.T., Sturmann, L., Sturmann, J., & Turner, N.H.
CIA	Baron, F., Monnier, J., Pedretti, E., Zhao, M., Schaefer, G., Parks, R., Che, X.,
CIA	Thureau, N., ten Brummelaar, T.A., McAlister, H.A., Ridgway, S.T., Farrington, C.,
CIA	Sturmann, J., Sturmann, L., & Turner, N.
CIA	Che, X., Monnier, J.D., Tycner, C., Kraus, S., Zavala, R.T., Baron, F., Pedretti,
CIA	E., ten Brummelaar, T., McAlister, H., Ridgway, S.T., Sturmann, J., Sturmann, L.,
CIA	& Turner, N.
CIA	Baines, E.K., White, R.J., Huber, D., Jones, J., Boyajian, T., McAlister, H.A.,
CIA	ten Brummelaar, T.A., Turner, N.H., Sturmann, J., Sturmann, L., Goldfinger, P.J.,
CIA	Farrington, C.D., Riedel, A.R., Ireland, M., von Braun, K. & Ridgway, S.T.
CIA	Boyajian, T.S., McAlister, H.A., van Belle, G., Gies, D.R., ten Brummelaar, T.A.,
CIA	von Braun, K., Farrington, C., Goldfinger, P.J., O'Brien, D., Parks, J.R.,
CIA	Richardson, N.D., Ridgway, S., Schaefer, G., Sturmann, L., Sturmann, J., Touhami,
CIA	Y., Turner, N.H. & White, R.
CIA	Boyajian, T.S., von Braun, K., van Belle, G., McAlister, H.A., ten Brummelaar,
CIA	T.A., Kane, S.R., Muirhead, P.S., Jones, J., White, R., Schaefer, G., Ciardi, D.,
CIA	Henry, T., Lopez-Morales, M., Ridgway, S., Gies, D., Jao, W.-C., Rojas-Ayala, B.,
CIA	Parks, J.R., Sturmann, L., Sturmann, J., Turner, N.H., Farrington, C., Goldfinger,
CIA	ApJ 757, 112, 2012
CIA	Gallenne, A., Monnier, J., Merand, A., Kervella, P., Kraus, S., Schaefer, G.H.,
CIA	Gieren, W., Pietrzynski, G., Szabados, L., Che, X., Baron, F., Pedretti,E., et al.
CIA	Absil, O., Defrere, D., Coude du Foresto, V., Di Folco, E., Merand, A., Augereau,
CIA	J.-C., Ertel, S., Hanot, C., Kervella, P., Mollier, B., Scott, N., Che, X. et al.
CIA	Boyajian, T.S., von Braun, K., van Belle, G., Farrington, C., Schaefer, G., Jones,
CIA	J., White, R., McAlister, H.A., ten Brummelaar, T.A., Ridgway, S., Gies, D.R.,
CIA	Sturmann, L., Sturmann, J., Turner, N.H., Goldfinger, P.J. & Vargas, N.
CIA	Farrington, C.D., ten Brummelaar, T.A., Mason, B.D., Hartkopf, W.I., Mourard, D.,
CIA	Moravveji, E., McAlister, H.A., Turner, N.H., Sturmann, L., & Sturmann, J.
CIA	von Braun, K., Boyajian, T.S., van Belle, G.T., Kane, S.R., Jones, J., Farrington,
CIA	C., Schaefer, G., Vargas, N., Scott, N., ten Brummelaar, T.A., Kephart, M., Gies,
CIA	D.R., Ciardi, D.R., Lopez-Morales, M., Mazingue, C., McAlister, H.A., Ridgway, S.,
CIA	Goldfinger, P.J., Turner, N.H. & Sturmann, L.
CIA	Mourard, D., Monnier, J., Meilland, A., Gies, D., Millour, F., Benisty, M.,
CIA	Che, X., Grundstrom, E.D., Ligi, R., Schaefer, G., Baron, F., Kraus, S.,
CIA	Zhao, M., Pedretti, E., Berio, P., Clausse, J.M., Nardetto, N., Perraut, K.,
CIA	Spang, A., Stee, P., Tallon-Bose, I., McAlister, H., ten Brummelaar, T.,
CIA	Ridgway, S.T., Sturmann, J., Sturmann, L., Turner, N. & Farrington, C.
CIA	Roettenbacher, R.M., Monnier, J., Henry, G.W., Fekel, F.C., Williamson, M.H.,
CIA	Pourbaix, D., Latham, D.W., Latham, C.A., Torres, G., Baron, F., Che, X.,
CIA	Kraus, S., et al.
CIA	Roettenbacher, R.M., Monnier, J., Fekel, F.C., Henry, G.W., Korhonen, H.,
CIA	Latham, D.W., Muterspaugh, M.W., Williamson, M.H., Baron, F.,
CIA	ten Brummelaar, T.A., Che, X., Harmon, R.O., et al.
CIA	Boyajian, T., von Braun, K., Feiden, G.A., Huber, D., Basu, S., Demarque, P.,
CIA	Fischer, D.A., Schaefer, G., Mann, A.W., White, T.T., Maestro, V., Brewer, J.,
CIA	Lamell, C.B., Spada, F., Lopez-Morales, M., Ireland, M., Farrington, C., van Belle,
CIA	G.T., Kane, S.R., Jones, J., ten Brummelaar, T.A., Ciardi, D.R., McAlister, H.A.,
CIA	Ridgway, S., Goldfinger, P.J., Turner, N.H. & Sturmann, L.
CIA	Gallenne, A., Merand, A., Kervella, P., Monnier, J., Schaefer, G.H.,
CIA	Roettenbacher, R.M., Gieren, W., Pietrzynski, G., McAlister, H.A.,
CIA	ten Brummelaar, T.A., Sturmann, J., Sturmann, L., Turner, N.H., & Anderson, R.I.
CIA	Richardson, N.D., Shenar, T., Roy-Loubier, O., Schaefer, G., Moffat, A.F.J.,
CIA	St-Louis, N., Gies, D.R., Farrington, C., Hill, G.M., Williams, P.M.,
CIA	Gordon, K., Pablo, H., & Ramiaramanantsoa, T.
CIA	Schaefer, G.H., Hummel, C.A., Gies, D.R., Zavala, R.T., Monnier, J.D.,
CIA	Walter, F.M., Turner, N.H., Baron, F., ten Brummelaar, T., Che, X.,
CIA	Farrington, C.D., Kraus, S., Sturmann, J., & Sturmann, L.
CIA	Gardner, T., Monnier, J.D., Fekel, F.C., Williamson, M., Duncan, D.K., White, T.R.,
CIA	Ireland, M., Adams, F.C., Barman, T., Baron, F., ten Brummelaar, T., Che, X.,
CIA	Huber, D., Kraus, S., Roettenbacher, R.M., Schaefer, G., Sturmann, J., Sturmann, L.,
CIA	ApJ 855, 1, 2018
CIA	Schaefer, G.H., White, R.J., Baines, E.K., Boyajian, T.S., ten Brummelaar, T.A.,
CIA	White, T.R., Huber, D., Mann, A.W., Casagrande, L., Grunblatt, S.K., Justesen,
CIA	Farrington, C.D., Fekel, F.C., Schaefer, G.H. & ten Brummelaar, T.A.
CIA	Lester, K.V., Gies, D.R., Schaefer, G.H., Farrington, C.D., Monnier, J.D.,
CIA	Lester, K.V., Gies, D.R., Schaefer, G.H., Farrington, C.D., Guo, Z., Matson, R.A.,
CIA	Lester, K.V., Fekel, F.C., Muterspaugh, M., Gies, D.R., Schaefer, G.H., Farrington,
CIA	Thomas, J.D., Richardson, N.D., Eldridge, J.J., Schaefer, G., Monnier, J.D.,
CIA	Sana, H., Moffat, A.F.J., Williams, P., Corcoran, M.F., Stevens, I.R., Weigelt, G.,
CIA	Zainol, F.D., Anugu, N., Le Bouquin, J.-B., ten Brumelaar, T.A., Campos, F., et al.
CIA	Klement, R., Hadrava, P., Rivinius, T., Baade, D., Cabezas, M., Heida, M.,
CIA	Schaefer, G.H., Gardner, T., Gies, D.R., Anugu, N., Lanthermann, C., Davies, C.L.,
CIA	Anderson, M.D., Monnier, J.D., Ennis, J., Labdon, A., Setterholm, B.R., Kraus, S.,
CIA	ten Brummelaar, T.A. & Le Bouquin, J.-B.
CIA	Gardner, T., Monnier, J.D., Fekel, F.C., Williamson, M., Baron, F., Hinkley, S.,
CIA	Gardner, T., Monnier, J.D., Fekel, F.C., Schaefer, G., Johnson, K.J.C., Le Bouquin,
CIA	Richardson, N.D., Lee, L., Schaefer, G., Shenar, T., Sander, A.A.C., Hill, G.M.,
CIA	Klement, R., Schaefer, G.H., Gies, D.R., Wang, L., Baade, D., Rivinius, T.,
CIA	Schaefer, G., Anugu, N., ten Brummelaar, T., Farrington, C., Gies, D., Jones, J.,
CIA	Morales, L.M., Sandquist, E.L., Schaefer, G.H., Farrington, C.D., Klement, R.,
CIA	Torres, G., Schaefer, G.H., Monnier, J.D., Anugu, N., Davies, C.L., Ennis, J.,
CIA	Farrington, C.D., Gardner, T., Klement, R., Kraus, S., Labdon, A., Lanthermann, C.,
CIA	Lester, K.V., Schaefer, G.H., Fekel, F.C., Gies, D.R., Henry, T.J., Jao, W.-C.,
CIA	Gardner, T., Monnier, J.D., Fekel, F.C., Le Bouquin, J.-B., Scovera, A., Schaefer,
CIA	Klement, R., Baade, D., Rivinius, T., Gies, D.R., Wang, L., Labadie-Bartz, J.,
CIA	De Furio, M., Gardner, T., Monnier, J., Meyer, M.R., Kratter, K., Schaefer, G.,
CIA	Lanthermann, C., Le Bouquin, J.-B., Sana, H., Merand, A., Monnier, J.D., Perrault,
CIA	K., Frost, A.J., Mahy, L., Gosset, E., De Becker, M., Kraus, S., Aruga, N. et al.
CIA	Lam, R., Sandquist, E.L., Schaefer, G.H., Farrington, C.D., Monnier, J.D., Anugu,
CIA	AJ 166, 29, 2023
CIA	Klement, R., Rivinius, T., Gies, D.R., Baade, D., Merand, A., Monnier, J.D.,
CIA	Echeverri, D., Xuan, J.W., Monnier, J.D., Delorme, J.-R., Wang, J.J., Jovanovic,
CIA	Evans, N.R., Schaefer, G.H., Gallenne, A., Torres, G., Horch, E.P., Anderson, R.I.,
CIA	Torres, G., Schaefer, G.H., Stefanik, R.P., Latham, D.W., Boden, A.F., Anugu, N.,
CIA	Evans, N.R., Gallenne, A., Kervella, P., Merand, A., Monnier, J., Anderson, R.I.,
CIA	Kuraszkiewicz, J., Anugu, N., Roettenbacher, R.M., Lanthermann, C., Gutierrez, M.,
CIA	Richardson, N.D., Schaefer, G.H., Eldridge, J.J., Spejcher, R., Holdsworth, A.,
CIA	Holdsworth, A., Richardson, N.D., Schaefer, G.H., Eldridge, J.J., Hill, G.M.,
CIA	Shepard, K., Gies, D.R., Schaefer, G.H., Anugu, N., Baron, F.R., Lanthermann, C.,
CIA	Danner, C.A., Sandquist, E.L., Schaefer, G.H., Bedin, L.R., Farrington, C.D.,
CIA	De Furio, M., Gardner, T., Monnier, J.D., Meyer, M.R., Kratter, K.M., Lanthermann,
CIA	Torres, G., Tkachenko, A., Pavlovski,K., Gossage, S., Schaefer, G.H., Melis. C.,
DOB	Doberck, W.A.
RAG	Raghavan, D., Henry, T.J., Mason, B.D., Subasavage, J.P., Jao, W.-C., Beaulieu,
RAG	T.D., & Hambly, N.C.
RAG	Raghavan, D., McAlister, H.A., Torres, G., Latham, D.W., Mason, B.D., Boyajian,
RAG	T.S., Baines, E.K., Williams, S.J. et al.
RAG	Raghavan, D., McAlister, H.A., Henry, T.J., Latham, D.W., Marcy, G.W.,
RAG	Mason, B.D., Gies, D.R., White, R.J. & ten Brummelaar, T.A.
TOK	Tokovinin, A., Cantarutti, R., Tighe, R., Schurter, P., van der Bliek, N.,
TOK	Martinez, M., & Mondaca, E.
TOK	Tokovinin, A., Corbett, H., Fors, O., Howard, W., Law, N.M., Moe, M.,
TOK	Tokovinin, A. & Briceno, C.
USN	Franz, O.G., Gossner, J.L., Josties, F.J., Lindenblad, I.W., Mikesell, A.H.,
USN	Pub. USNO 18, Pt.1, 1963
USN	Kallarakal, V.V., Lindenblad, I.W., Josties, F.J., Riddle, R.K., Miranian, M.,
USN	Mintz, B.F., & Klugh, A.P.
USN	Harrington, R.S., Dahn, C.C., Behall, A.L., Priser, J.B., Christy, J.W., Riepe,
USN	B.Y., Ables, H.D., Guetter, H.H., et al.
USN	Dahn, C.C., Harrington, R., Riepe, B.Y., Christy, J.W., Guetter, H.H.,
USN	Behall, A.L., Walker, R.L., Hewitt, A.V., & Ables, H.D.
USN	Dahn, C.C., Harrington, R.S., Riepe, B.Y., Christy, J.W., Guetter, H.H.,
USN	Kallarakal, V.V., Miranian, M., Walker, R.L., et al.
USN	Harrington, R.S., Kallarakal, V.V., Christy, J.W., Dahn, C.C., Riepe, B.Y.,
USN	Guetter, H.H., Ables, H.D., Hewitt, A.V., et al.
USN	Dahn, C.C., Harrington, R.S., Kallarakal, V.V., Guetter, H.H., Luginbuhl, C.B.,
USN	Riepe, B.Y., Walker, R.L., Pier, J.R., et al.
USN	Harrington, R.S., Dahn, C.C., Kallarakal, V.V., Guetter, H.H., Riepe, B.Y.,
USN	Walker, R.L., Pier, J.R., Vrba, F.J., et al.
USN	Monet, D., Bird A., Canzian B., Dahn C., Guetter H., Harris H., Henden A.,
USN	Levine S., Luginbuhl C., Monet A.K.B., Rhodes A., Riepe B., et al.
USN	Harris, H.C., Dahn, C.C., Dupuy, T.J., Canzian, B., Guetter, H.H., Hartkopf, W.I.,
USN	Ireland, M.J., Leggett, S.K., Levine, S.E., Liu, M.C., Luginbuhl, C.B.,
USN	Monet, A.K.B., Stone, R.C., Subasavage, J.P., Tilleman, T., & Walker, R.L.
USN	Dahn, C.C., Harris, H.C., Subasavage, J.P., Ables, H.D., Canzian, B.J., Guetter,
USN	H.H., Harris, F.H., Henden, A.H., Leggett, S.K., Levine, S.E., Luginbuhl, C.B.,
USN	Monet, A.B., Monet, D.G., Munn, J.A., Pier, J.R., Stone, R.C., Vrba, F.J., Walker,
USN	R.L. & Tillerman, T.M.

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	dm_number	notes	coord_arcsec_2000
00491+5749	STF 60	AE	2002	13	127	91.8	3.52	10.15			N DP	004905.10+574859.6
00491+5749	STF 60	AE	2008	15	124	82.6	3.52	10.15			N DP	004905.10+574859.6
00491+5749	STF 60	AE	2009	16	124	82.9	3.52	10.15			N DP	004905.10+574859.6
00491+5749	STF 60	AE	2011	20	125	79.3	3.52	10.15			NLUP	004905.10+574859.6
00491+5749	STF 60	AE	2012	23	125	78.0	3.52	10.15	G0V		NL P	004905.14+574859.4
00491+5749	STF 60	AE	2015	24	126	75.6	3.52	10.15	G0V		NL P	004905.14+574859.4
00491+5749	STF 60	AE	2023	25	126	66.0	3.52	10.15	G0V		NL P	004906.29+574854.7

If you need more information about this double, apply for a data request form to the WDS.

WDS 00491+5749 STF 60 AE : VISUAL OBSERVATIONS REPORTS

No records found.

WDS 00491+5749 STF 60 AE : MEASURES

No records found.

WDS 00491+5749 : VIRTUAL EYEPIECE

Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.

WDS 00491+5749 : ALADIN DSS IMAGE @ 00^h 49^m 06.29^s +57° 48' 54.7"

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

WDS 00491+5749 STF 60 AE : NEIGHBORHOODS

Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.

Show	name	coord_2000	discov#	comp	pa	sep	dist(')
Show	Achird	00491+5749	STF 60	AB	328	13.5	0
Show	Achird	00491+5749	SMR 2	AI	73	90.3	0
Show	Achird	00491+5749	SMR 2	AJ	262	237.1	0
Show	Achird	00491+5749	STF 60	AC	260	225.0	0
Show	Achird	00491+5749	STF 60	AE	126	66.0	0
Show	Achird	00491+5749	STF 60	AH	355	701.1	0
Show	Achird	00491+5749	STF 60	AG	259	419.7	0
Show	Achird	00491+5749	STF 60	AD	354	189.4	0
Show	Achird	00491+5749	STF 60	AF	276	378.3	0
Show		00491+5749	STF 60	Aa,Ab	134	5.1	0
Show		00491+5749	STF 60	BC	259	235.4	1
Show		00491+5749	STF 60	BD	1	172.2	1
Show		00491+5749	STF 60	BE	126	105.5	1
Show		00491+5749	STF 60	BF	275	388.1	1
Show		00491+5749	STF 60	BG	256	420.0	1
Show		00491+5749	STF 60	BH	355	688.4	1
Show		00491+5749	STF 60	FG	188	142.2	7
Show		00490+5802	TDS1629		121	1.0	14
Show		00469+5735	TDS1610	AB	239	1.9	24
Show		00469+5735	TDS1610	AB,C	108	5.7	24
Show		00503+5725	STI1442		75	5.9	27
Show		00465+5731	MLR 651		46	1.0	27
Show		00492+5720	A 921	AB	2	0.2	30
Show		00492+5720	A 921	AB,C	269	4.8	30
Show		00522+5805	TDS1646		139	0.5	30
Show		00479+5819	TDS1615		133	1.2	32
Show		00483+5823	STI1429		319	10.4	35
Show		00513+5717	TDS1638		114	1.9	37
Show		00472+5716	TDS 29		245	2.6	37
Show		00492+5830	J 2385		237	7.0	40
Show		00434+5750	MLR 649		97	1.4	45
Show		00548+5759	STI1471		118	13.3	47
Show		00437+5807	STI1419	AB	259	16.1	48
Show		00437+5807	BKO 135	BC	243	9.9	48
Show		00531+5713	ES 552		86	14.5	49
Show		00486+5701	STI1432		19	7.2	49
Show		00514+5705	ES 1868	AB	185	6.5	50
Show		00514+5705	FYM 210	AC	104	23.8	50
Show		00429+5742	A 916		240	0.3	51
Show		00429+5738	ES 404		31	1.5	51
Show		00533+5711	STI1463	AB	19	10.5	52
Show		00533+5711	BKO 140	AC	93	13.4	52
Show		00555+5800	ES 1771		355	7.8	52
Show		00557+5748	ES 405		117	4.4	53
Show		00426+5736	ES 1806		237	5.7	54
Show		00513+5840	GIC 14		11	12.2	54
Show		00425+5735	TDS1575		98	4.9	55
Show		00450+5833	BKO 138		343	3.2	56
Show		00448+5833	BKO 137	BC	268	12.8	56
Show		00448+5833	STI1423	AB	169	13.2	56
Show		00555+5725	STI1475		2	8.1	57

WDS 00491+5749 : COMPONENTS

	A	Ab	B	C	D	E	F	G	H	I
Ab	pa=134.0° sep=5.11"
B	pa=315.5° sep=12.89"	pa=315.1° sep=18.00"
C	pa=259.5° sep=225.06"	pa=260.5° sep=228.07"	pa=256.7° sep=218.12"
D	pa=354.0° sep=189.44"	pa=353.0° sep=193.38"	pa=356.6° sep=179.53"	pa=41.3° sep=305.24"
E	pa=126.2° sep=65.96"	pa=125.5° sep=60.90"	pa=127.7° sep=78.70"	pa=89.6° sep=274.57"	pa=162.2° sep=238.78"
F	pa=275.9° sep=378.98"	pa=276.4° sep=383.02"	pa=274.6° sep=369.14"	pa=297.1° sep=175.08"	pa=247.3° sep=386.97"	pa=280.3° sep=437.24"
G	pa=258.5° sep=419.80"	pa=259.1° sep=422.72"	pa=257.0° sep=412.91"	pa=257.3° sep=194.80"	pa=235.2° sep=476.58"	pa=264.5° sep=466.83"	pa=195.6° sep=127.25"
H	pa=355.4° sep=701.08"	pa=355.1° sep=704.92"	pa=356.1° sep=691.24"	pa=12.6° sep=757.94"	pa=355.9° sep=511.72"	pa=351.6° sep=745.82"	pa=25.9° sep=733.38"	pa=24.4° sep=858.92"
I	pa=72.6° sep=90.27"	pa=69.7° sep=87.94"	pa=79.4° sep=96.81"	pa=77.5° sep=314.86"	pa=146.8° sep=193.02"	pa=26.5° sep=73.71"	pa=91.5° sep=463.22"	pa=77.5° sep=509.66"	pa=168.1° sep=686.68"
J	pa=261.6° sep=237.17"	pa=262.6° sep=240.33"	pa=259.0° sep=229.81"	pa=295.5° sep=14.78"	pa=223.9° sep=309.57"	pa=270.9° sep=287.93"	pa=117.3° sep=160.30"	pa=74.5° sep=183.40"	pa=193.6° sep=754.75"	pa=259.1° sep=326.62"

00491+5749 A

Common name	Achird	Meaning	first applied to ? Cassiopeiae in the Skalnate Pleso Atlas of the Heavens published in 1950, but is not known prior to that.	Other names	MARFAK	Coord arcsec 2000	004906.29+574854.7
Mag	3.52	Spectral class	G1V (yellow)	PmRA	114.00	PmDE	-57.0
SAO	21732	HIP	3821	Tycho2	3663-02669-1	HD	4614
HR	219	GC	962	BD	BD+57 150	Bayer	Eta Cassiopeiae
Bayer name	eta Cas	Flamsteed	24 Cassiopeiae	Flamsteed name	24 Cas

Tycho2

Tycho2	3663-02669-1	Pflag	X	RAmdeg		DEmdeg
PmRA		PmDE		E RAmdeg		E DEmdeg
E pmRA		E pmDE		EpRAm		EpDEm
Num		Q RAmdeg		Q DEmdeg		Q pmRA
Q pmDE		BTmag	4.142	E BTmag	0.014	VTmag	3.518
E VTmag	0.009	Prox	129	TYC	T	HIP	3821
CCDM	A	RAdeg	12.27143833	DEdeg	57.81649972	EpRA 1990	1.58
EpDE 1990	1.56	E RAdeg	3.1	E DEdeg	3.1	Posflg
Corr	0.3

SAO

SAO	21732	DelFlag		RA1950		PmRA1950	0.1368
DE1950		PmDE1950	-0.521	Vmag	3.6	SpType	F8
Double code		Source	70	CatNum	962	DM	BD+57 150
DMcomp		BDsup		HD	4614	M HD	0
GC	962	RA1950rad	0.20097791	DE1950rad	1.00445227	PmRA2000	0.1377
PmDE2000	-0.529

Hipparcos

Catalog	H	HIP	3821	Proxy		RAhms	00 49 05.10
DEdms	+57 48 59.6	Vmag	3.46	VarFlag	1	R Vmag	H
RAdeg	12.2713	DEdeg	57.8165	AstroRef	A	Plx	167.99
CCDM	1087.11 -	N CCDM	I	Nsys	2	Ncomp	2
MultFlag	C	Source		Qual	A	M HIP	AB
Theta	313	Rho	12.49	HD		BD	BD+57 150
CD		CP		Dm number	+57 150	VIred	0.65
SpType	G0V SB	R SpType		Coord arcsec 2000	004905.10+574859.6

Hipparcos 2

HIP	3821	Sn	17	So	3	Nc	2
RArad	0.2141737695	DErad	1.0090891165	Plx	167.98	PmRA	1086.59
PmDE	-559.43	E RArad	0.3	E DErad	0.27	E Plx	0.48
E pmRA	0.4	E pmDE	0.33	Hpmag		E Hpmag	0.0024
SHp	0.009	VA	2	BV	0.587	E BV	0.003
VI	0.66

CCDM

Ccdm	00491+5749	RComp		Comp	A	Note1
Note2		Discov num		DRAs	-0.28	DDEs	-0.8
R dRAs	10	Year		Theta		Rho
Obs	8	Vmag	3.6	Sp	F8	PmNote	*
PmRA	1108	PmDE	-510	Dm number	+57 150	Cat1	BD
Name2	+57 81	Cat2	AGK2/3	HD	4614	M HD
ADS BDS	A 671	M ADS BDS		N IDS		IDS	00430N5717A
HIC	3821

00491+5749 Ab

Coord arcsec 2000

004906.75+574851.1

Delta magnitude

3.52

Coordinate calculated

yes

00491+5749 B

Coord arcsec 2000	004905.16+574903.9		Coord calc	004905.16+574903.9		Mag	7.36		Spectral class	K7V (yellow-orange)
PmRA	115.00		PmDE	-47.0		Delta magnitude	3.84

CCDM

Ccdm	00491+5749	RComp		Comp	B	Note1	*
Note2		Discov num	STF 60	DRAs		DDEs
R dRAs		Year	1959	Theta		Rho
Obs	99	Vmag	7.2	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A 671	M ADS BDS		N IDS		IDS	00430N5717B
HIC

00491+5749 C

Coord arcsec 2000	004838.60+574813.7		Mag	11.4		PmRA	0.00		PmDE	0.0
Delta magnitude	7.88		Coordinate calculated	yes

CCDM

Ccdm	00491+5749	RComp		Comp	C	Note1
Note2		Discov num	STF 60	DRAs	-27.53	DDEs	-46.3
R dRAs	65	Year	1922	Theta	238	Rho	158.9
Obs	2	Vmag	11.4	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A 671	M ADS BDS		N IDS		IDS	00430N5717C
HIC

00491+5749 D

Coord arcsec 2000	004903.81+575203.1		Mag	12.8		PmRA	0.00		PmDE	0.0
Delta magnitude	9.28		Coordinate calculated	yes

CCDM

Ccdm	00491+5749	RComp		Comp	D	Note1
Note2		Discov num	STF 60	DRAs	-0.60	DDEs	175.8
R dRAs	65	Year	1921	Theta	030	Rho	159.6
Obs	2	Vmag	11.6	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A 671	M ADS BDS		N IDS		IDS	00430N5717D
HIC

00491+5749 E

Coord arcsec 2000	004912.95+574815.7		Mag	10.15		PmRA	0.00		PmDE	0.0
Delta magnitude	6.63		Coordinate calculated	yes

CCDM

Ccdm	00491+5749	RComp		Comp	E	Note1
Note2		Discov num	STF 60	DRAs	10.01	DDEs	-56.8
R dRAs	65	Year	1921	Theta	120	Rho	190.6
Obs	6	Vmag	9.0	Sp		PmNote
PmRA		PmDE		Dm number	+57 155	Cat1	BD
Name2		Cat2		HD		M HD
ADS BDS	A 671	M ADS BDS		N IDS		IDS	00430N5717E
HIC

00491+5749 F

Coord arcsec 2000	004819.10+574933.6		Coord calc	004819.10+574933.6		Mag	11.53		PmRA	-3.00
PmDE	-2.0		Tycho2	3663-01484-1		Delta magnitude	8.01

Tycho2

Tycho2	3663-01484-1	Pflag		RAmdeg	12.07959919	DEmdeg	57.82600727
PmRA	-10.0	PmDE	0.3	E RAmdeg	121	E DEmdeg	118
E pmRA	4.1	E pmDE	4.5	EpRAm	1978.64	EpDEm	1981.49
Num	3	Q RAmdeg	0.9	Q DEmdeg	0.4	Q pmRA	0.9
Q pmDE	0.4	BTmag	13.351	E BTmag	0.238	VTmag	11.746
E VTmag	0.099	Prox	999	TYC		HIP
CCDM		RAdeg	12.07964361	DEdeg	57.82600639	EpRA 1990	1.59
EpDE 1990	1.62	E RAdeg	131.5	E DEdeg	126.2	Posflg
Corr	0.3

CCDM

Ccdm	00491+5749	RComp		Comp	F	Note1
Note2		Discov num	STF 60	DRAs	-46.83	DDEs	34.3
R dRAs	65	Year	1913	Theta	268	Rho	281.7
Obs	1	Vmag	11.2	Sp		PmNote
PmRA		PmDE		Dm number		Cat1
Name2		Cat2		HD		M HD
ADS BDS	A 671	M ADS BDS		N IDS		IDS	00430N5717F
HIC

00491+5749 G

Coord arcsec 2000	004814.82+574731.0	Mag	9.53	PmRA	1.00	PmDE	-1.0
SAO	21730	HIP	3809	Tycho2	3663-01096-1	HD	236533
BD	BD+57 151	Delta magnitude	6.01	Coordinate calculated	yes

Tycho2

Tycho2	3663-01096-1	Pflag		RAmdeg	12.06895191	DEmdeg	57.78688998
PmRA	9.0	PmDE	-5.4	E RAmdeg	9	E DEmdeg	9
E pmRA	1.7	E pmDE	1.7	EpRAm	1990.93	EpDEm	1990.98
Num	8	Q RAmdeg	0.7	Q DEmdeg	1.6	Q pmRA	0.7
Q pmDE	1.6	BTmag	9.808	E BTmag	0.018	VTmag	9.526
E VTmag	0.016	Prox	999	TYC	T	HIP
CCDM		RAdeg	12.06891278	DEdeg	57.78690333	EpRA 1990	1.58
EpDE 1990	1.64	E RAdeg	9.0	E DEdeg	8.7	Posflg
Corr	0.3

SAO

SAO	21730	DelFlag		RA1950		PmRA1950	-0.0002
DE1950		PmDE1950	0.003	Vmag	8.1	SpType	K7
Double code		Source	38	CatNum	657	DM	BD+57 151
DMcomp		BDsup		HD	236533	M HD	0
GC		RA1950rad	0.2008733	DE1950rad	1.0076645	PmRA2000	-0.0001
PmDE2000	-0.002

Hipparcos

Catalog	H	HIP	3809	Proxy		RAhms	00 48 57.85
DEdms	+58 00 26.2	Vmag	8.22	VarFlag		R Vmag	H
RAdeg	12.241	DEdeg	58.0073	AstroRef		Plx	2.31
CCDM	-4.51	N CCDM	I	Nsys	2	Ncomp	1
MultFlag		Source		Qual		M HIP
Theta		Rho		HD	236533	BD	BD+57 151
CD		CP		Dm number	+57 151	VIred	1.63
SpType	K7	R SpType		Coord arcsec 2000	004857.85+580026.2

Hipparcos 2

HIP	3809	Sn	5	So	0	Nc	1
RArad	0.2136461651	DErad	1.0124178534	Plx	1.69	PmRA	-4.68
PmDE	-0.85	E RArad	0.48	E DErad	0.47	E Plx	0.85
E pmRA	0.73	E pmDE	0.6	Hpmag		E Hpmag	0.0013
SHp	0.018	VA	0	BV	1.673	E BV	0.036
VI	1.7

CCDM

Ccdm	00491+5749	RComp		Comp	G	Note1
Note2		Discov num	STF 60	DRAs	-49.53	DDEs	-107.5
R dRAs	65	Year	1915	Theta	243	Rho	339.2
Obs	4	Vmag	8.9	Sp	A5	PmNote	*
PmRA	2	PmDE	26	Dm number	+56 129	Cat1	BD
Name2	+57 80	Cat2	AGK2/3	HD		M HD
ADS BDS	A 671	M ADS BDS		N IDS		IDS	00430N5717G
HIC

00491+5749 H

Coord arcsec 2000	004859.25+580033.5		Mag	8.41		PmRA	-1.00		PmDE	0.0
Tycho2	3663-02614-1		Delta magnitude	4.89		Coordinate calculated	yes

Tycho2

Tycho2	3663-02614-1	Pflag		RAmdeg	12.24099563	DEmdeg	58.00726802
PmRA	-5.6	PmDE	-0.7	E RAmdeg	6	E DEmdeg	6
E pmRA	1.2	E pmDE	1.3	EpRAm	1990.93	EpDEm	1991.11
Num	13	Q RAmdeg	0.8	Q DEmdeg	0.7	Q pmRA	0.8
Q pmDE	0.7	BTmag	10.471	E BTmag	0.025	VTmag	8.405
E VTmag	0.011	Prox	999	TYC	T	HIP	3809
CCDM		RAdeg	12.24101972	DEdeg	58.00727000	EpRA 1990	1.61
EpDE 1990	1.62	E RAdeg	6.0	E DEdeg	6.1	Posflg
Corr	0.3

CCDM

Ccdm	00491+5749	RComp	B	Comp	H	Note1
Note2		Discov num	STF 60	DRAs	-8.22	DDEs	685.8
R dRAs	65	Year	1928	Theta	2	Rho	648.0
Obs	1	Vmag	8.6	Sp	K7	PmNote	*
PmRA	-7	PmDE	21	Dm number	+57 151	Cat1	BD
Name2	+57 82	Cat2	AGK2/3	HD		M HD
ADS BDS	A 671	M ADS BDS		N IDS		IDS	00430N5717H
HIC	3809

00491+5749 I

Coord arcsec 2000	004917.07+574921.7		Mag	11.6		PmRA	6.00		PmDE	3.0
Tycho2	3663-00284-1		Delta magnitude	8.08		Coordinate calculated	yes

Tycho2

Tycho2	3663-00284-1	Pflag		RAmdeg	12.32837841	DEmdeg	57.82084484
PmRA	6.1	PmDE	3.3	E RAmdeg	92	E DEmdeg	78
E pmRA	3.3	E pmDE	3.3	EpRAm	1979.84	EpDEm	1983.95
Num	4	Q RAmdeg	0.1	Q DEmdeg	0.2	Q pmRA	0.1
Q pmDE	0.2	BTmag	12.345	E BTmag	0.120	VTmag	11.688
E VTmag	0.095	Prox	750	TYC		HIP
CCDM		RAdeg	12.32835167	DEdeg	57.82083722	EpRA 1990	1.56
EpDE 1990	1.67	E RAdeg	99.7	E DEdeg	82.1	Posflg
Corr	0.3

00491+5749 J

Coord arcsec 2000	004836.93+574820.1		Mag	12.3		HIP	3825		BD	BD-21 119
Delta magnitude	8.78		Coordinate calculated	yes

Hipparcos

Catalog	H	HIP	3825	Proxy		RAhms	00 49 06.22
DEdms	-21 09 03.8	Vmag	7.04	VarFlag	1	R Vmag	G
RAdeg	12.2759	DEdeg	-21.1511	AstroRef		Plx	4.06
CCDM	-24.22	N CCDM		Nsys		Ncomp	1
MultFlag	G	Source		Qual		M HIP
Theta		Rho		HD		BD	BD-21 119
CD		CP		Dm number	-21 119	VIred	0.91
SpType	K0/1III +G	R SpType		Coord arcsec 2000	004906.22-210903.8

Hipparcos 2

HIP	3825	Sn	5	So	1	Nc	1
RArad	0.2142554964	DErad	-0.3691555059	Plx	5.87	PmRA	-19.99
PmDE	-34.97	E RArad	0.72	E DErad	0.73	E Plx	1.01
E pmRA	1.19	E pmDE	0.78	Hpmag		E Hpmag	0.0017
SHp	0.014	VA	2	BV	0.907	E BV	0.002
VI	0.91