02318+8916 STF 93 AB (Polaris)

Coord 2000	02318+8916		Discov num	STF  93		Comp	AB		Coord arcsec 2000	02 31 49.09 +89 15 50.7
Date first	1779		Date last	2016		Obs	65
Pa first	203		Pa last	235.7		P.A. Now (θ)	235.7°
Sep first	17.3		Sep last	18.39		Sep. Now (ρ)	18.39"
Mag pri	2.04		Mag sec	9.10		delta mag (ΔM)	7.06		Spectral class	F7Ib+F3V (yellow-white/yellow-white)
Pri motion ra	+038		Sec motion ra
Pri motion dec	-015		Sec motion dec
Notes	N V (See Notes, Proper motion indicates physical)

This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		308	02 31 49 +89 15 51	WRH 39 Aa,Ab	2023	14	293	0.1	2.30	4.30	2.00	Y
Show	Polaris	308	02 31 49 +89 15 51	STF 93 AB	2016	65	236	18.4	2.04	9.10	7.06		<===
Show		308	02 31 49 +89 15 51	STF 93 AC	2016	7	103	39.0	2.04	13.80	11.76
Show		308	02 31 49 +89 15 51	STF 93 AD	2016	8	194	83.2	2.04	14.30	12.26
Show			02 30 43 +89 15 39	STF 93 BC	2015	4	83	53.1	8.60	13.80	5.20
Show			02 30 43 +89 15 39	STF 93 BD	2016	4	179	69.3	8.60	13.90	5.30

Quintuple system
4 estimated visually detectable stars in this system

Common name	Polaris		Constellation	Ursa Minor		SAO	308		HIP	11767
Tycho2	4628-00237-1		Gaia DR2	576402619921505664		HD	8890		HR	424
GC	2243		ADS	1477		BD	BD+88 8		Bayer	Alpha Ursae Minoris
Bayer name	Alp UMi		Flamsteed	1 Ursae Minoris		Flamsteed name	1 UMi		FK5	907
Distance	132.63		Distance ly	432.64		Bayer greek	α UMi

Other names

Lodestar, Cynosura, Alruccabah, Phoenice, Polare, Stella Polare, Tramontana, Angel Stern, Navigatoria, Star of Arcady, Yilduz, Mismar, Polyarnaya

discov_num	notes	refcode
STF 93	alp Umi = 1 UMi = Polaris. Cepheid variable and spectroscopic binary,
	P = 30y. A close companion has been suspected. The close pair,
	measured three time from 1937-1939 by R.H. Wilson using an eyepiece	WRH1941b
	interferometer, was not seen again until Evans et al. (2006) resolved	Evs2006
	it with HST. Wilson's measures agree with the combined astrometric/
	spectroscopic solution by Gerasimovic (1936), although both orbit and	Ger1936
	measures are called into dispute by the more recent orbit of Wielan et	Wln2000
	al. (2000), whose solution includes mass estimates, etc.
	NPOI Limb-darkened diameter 3.28 +/- 0.02 mas,	NOI1999
	R = 46. +/- 3. \rsun.
	An earlier orbit by Wyller (1957) was rejected from Fourth Orbit	Wye1957
	Catalog ("amplitude below noise level")	Wor1983
	Component B = BD+88@@@7. See discussion of this system by Roemer.	Re_1965
	While Hipparcos parallax of A 7.56 +/- 0.48 from the original mission	HIP1997a
	and 7.54 +/- 0.011 mas from the re-reduction, the HST-FGS parallax of	VlF2007
	B = 6.26 +/- 0.24 mas implies that that A is high luminosity and	BdH2018
	pulsating in the second overtone if AB is physical, i.e., the distance
	to B is the same as A.
	The C component was observed by Burnham in the late 19th century, then	Bu_1894
	not seen again until the early 21st century by Daley and Ashcroft.	Dal2006a
	The extremely large magnitude makes the pair too close for most large
	astrometric surveys.
	The D component has also been recently recovered in 2MASS data.	TMA2003
	According to Jim Daley, the R-I color for C is 0.56 and for D it is
	0.67. The V-I color for D is 1.08.	Dal2006b
	Published measures precessed to J2000 are here "X" coded. Measures	CIA2024c
	precessed back to date of observation to maintain consistency with
	other cataloged measures.
	Mean diameter of the primary is 3.143 +/- 0.027 mas. At the Gaia
	distance of 136.90 +/- 0.34 pc this corresponds to 46.27 +/- 0.42 \rsun
	NPOI uniform disk diameter 3.110 +/- 0.005 mas, Limb darkened diameter
	3.284 +/- 0.006 mas.	NOI2025
	AB: H 4 1.	MEv2010

refcode	metd	author	reference
BdH2018	not -	Bond, H.E., Nelan, E.P., Evans, N.R., Schaefer, G.H. & Harmer, D.	2018ApJ...853...55B
BdH2018		ApJ 853, 55, 2018
Bu_1894	Ma j	Burnham, S.W.	1894PLicO...2....3B
Bu_1894		Pub. Lick Obs. 2, 3, 1894 (includes most data from Bu_1893a)	1893AN....131..329B
CIA2024c	Kc+ j	Evans, N.R., Schaefer, G.H., Gallenne, A., Torres, G., Horch, E.P., Anderson, R.I.,	2024ApJ..971...190E
CIA2024c	+H+
CIA2024c	+S+
CIA2024c	+orb
CIA2024c
Dal2006a	C u	Daley, J.A.	2006JDSO....2...44D
Dal2006a		JDSO 2, 44, 2006
Dal2006b	-	Daley, J.A.	2006JDSO....2...51D
Dal2006b		JDSO 2, 51, 2006
Evs2006	H j	Evans, N.R., Franz, O., Massa, D., Mason, B., Walker, R.L., & Marovska, M.	2006PASP..118.1545E
Evs2006	+S	PASP 118, 1545, 2006
Ger1936	orb -	Gerasimovic, B.P.	.
Ger1936		Pulkova Obs. Circ. #19, 1, 1936
HIP1997a	Hh -	Hipparcos	1997yCat.1239....0E
HIP1997a		Hipparcos Catalog, ESA SP-1200, 1997 (incl. Hp photometry, vol. 10)
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
NOI1999	not j	Nordgren, T.E., Germain, M.E., Benson, J.A., Mozurkewich, D., Sudol, J.J., Elias,	1999AJ....118.3032N
NOI1999		II, N.M., Hajian, A.R., White, N.M., Hutter, D.J., Johnston, K.J., Gauss, F.S.,	.
NOI1999		Armstrong, J.T., Pauls, T.A. & Rickard, L.J.	.
NOI1999		AJ 118, 3032, 1999	.
NOI2025	not j	Baines, E.K., Clark, J.H. III, Kingsley, B.I., Schmitt, H.R. & Stone, J.M.	2025AJ....169..293B
NOI2025
Re_1965	-	Roemer, E.	1965ApJ...141.1415R
Re_1965		ApJ 141, 1415, 1965
TMA2003	E2 j	2MASS Catalog	.
TMA2003		2MASS Point Src Cat., 2003 all-sky release (http://pegasus.phast.umass.edu/)
TMA2003		(Note: 2MASS photometry also added by cataloguer to 2MASS astrometry published
TMA2003		under other references.)
TMA2003
VlF2007	-	van Leeuwen, F.	2007A&A...474..653V
VlF2007		A&A 474, 653, 2007
Wln2000	orb -	Wielen, R., Jahreiss, H., Dettbarn, C., Lenhardt, H., & Schwan, H.	2000A&A...360..399W
Wln2000		A&A 360, 399, 2000
Wor1983	-	Worley, C.E. & Heintz, W.D.	1983PUSNO..24g...1W
Wor1983		Pub. USNO 24, Pt. 7, 1983 (Fourth Orbit Catalog)
WRH1941b	J -	Wilson, R.H.	1941PFAO....6b...1W
WRH1941b	+Ma	Pub. Univ. Penn. 6, Pt.4, 21, 1941
WRH1941b		(U and T coded observations per van den Bos, J Obs 34, 85, 1951)	1951JO.....34...85V
Wye1957	orb -	Wyller, A.A.	1957AJ.....62..384W
Wye1957		AJ 62, 384, 1957

discov	author
BDH	Bond, H.E., Gilliland, R.L., Schaefer, G.H., Demarque, P., Girard, T.M.,
BDH	Holberg, J.B., Gudehus, D., Mason, B.D., Kozhurina-Platais, V., Burleigh, M.R.,
BDH	Barstow, M.A., & Nelan, E.P.
BDH	Bond, H.E., Schaefer, G.H., Gilliland, R.L., Holberg, J.B., Mason, B.D.,
BDH	Lindenblad, I.W., Seitz-McLeese, M., Arnett, W.D., Demarque, P., Spada, F.,
BDH	Young, P.A., Barstow, M.A., Burleigh, M.R. & Gudehus, D.
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.,
DAL	Daley, J.A.
EVS	Evans, N.R., Schaefer, G.H., Bond, H., Bono, G., Karovska, M., Nelan, E.,
EVS	Sasselov, D., & Mason, B.D.
EVS	Evans, N.R., Pillitteri, I., Wolk, S., Karovska, M., Tingle, E., Guinan, E.,
EVS	Engle, S., Bond, H.E., Schaefer, G.H., & Mason, B.D.
EVS	Evans, N.R., Karovska, M., Bond, H.E., Schaefer, G.H., Sahu, K.C., Mack, J.,
EVS	Nelan, E.P., Gallenne, A. & Tingle, E.D.
EVS	Evans, N.R., Pillitteri, I., Molnar, L., Szabados, L., Plachy, E., Szabo, R.,
EVS	Engle, S., Guinan, E., Wolk, S., Gunther, H.M., Neilson, H., Marengo, M., Matthews,
EVS	AJ 159, 121, 2020
EVS	Evans, N.R., Gunther, H.M., Bond, H.E., Schaefer, G.H., Mason, B.D., Karovska, M.,
EVS	Tingle, E., Wolk, S., Engle, S., Guinan, E., Pillitteri, I., Proffitt, C.,
EVS	ApJ 905, 81, 2020
EVS	Evans, N.R., Gallenne, A., Kervella, P., Gunther, H.M., Kuraszkiewicz, J.,
EVS	Anderson, R.I., Proffitt, C., Merand, A., Trahin, B., Viviani, G. & Shetye, S.
HIP	(non-component double star solution: G = acceleration solution,
HIP	O = orbit solution, V = variability-induced mover, X = stochastic solution)
NOI	Benson, J.A., Hutter, D.J., Elias, N.M., Bowers, P.F., Johnston, K.J.,
NOI	Hajian, A.R., Armstrong, J.T., Mozurkewich, D., et al.
NOI	Nordgren, T.E., Germain, M.E., Benson, J.A., Mozurkewich, D., Sudol, J.J., Elias,
NOI	II, N.M., Hajian, A.R., White, N.M., Hutter, D.J., Johnston, K.J., Gauss, F.S.,
NOI	Armstrong, J.T., Pauls, T.A. & Rickard, L.J.
NOI	Armstrong, J.T., Nordgren, T.E., Germain, M.E., Hajian, A.R., Hindsley, R.B.,
NOI	Hummel, C.A., Mozurkewich, D. & Thessin, R.N.
NOI	Armstrong, J.T., Mozurkewich, D., Hajian, A.R., Johnston, K.J., Thessin, R.N.,
NOI	Peterson, D.M., Hummel, C.A., & Gilbreath, G.C.
NOI	Koubsky, P., Hummel, C.A., Harmanec, P., Tycner, C., van Leeuwen, F., Yang, S.,
NOI	Slechta, M., Bozic, H., Zavala, R.T., Ruzdjak, D., & Sudar, D.
NOI	Che, X., Monnier, J.D., Tycner, C., Kraus, S., Zavala, R.T., Baron, F., Pedretti,
NOI	E., ten Brummelaar, T., McAlister, H., Ridgway, S.T., Sturmann, J., Sturmann, L.,
NOI	& Turner, N.
NOI	Hutter, D.J., Zavala, R.T., Tycner, C., Benson, J.A., Hummel, C.A., Sanborn, J.,
NOI	Franz, O.G., & Johnston, K.J.
NOI	Schaefer, G.H., Hummel, C.A., Gies, D.R., Zavala, R.T., Monnier, J.D.,
NOI	Walter, F.M., Turner, N.H., Baron, F., ten Brummelaar, T., Che, X.,
NOI	Farrington, C.D., Kraus, S., Sturmann, J., & Sturmann, L.
NOI	Baines, E.K., Armstrong, J.T., Schmitt, H.R., Zavala, R.T., Benson, J.A., Hutter,
NOI	AJ 155, 30, 2018

coord_2000

discov_num

comp

epoch

obs

pa

sep

mag_pri

mag_sec

spectr

dm_number

notes

coord_arcsec_2000

02318+8916

STF 93

AB

2006

59

231

18.2

2.10

9.10

F7:Ib-IIv

+88 8

N D

023147.08+891550.9

02318+8916

STF 93

AB

2009

60

232

18.2

2.10

9.10

F7:Ib-IIv

+88 8

N D

023147.08+891550.9

02318+8916

STF 93

AB

2013

63

233

18.1

2.04

9.10

F7:Ib-IIv

+88 8

N D

023147.08+891550.9

02318+8916

STF 93

AB

2016

64

236

18.4

2.04

9.10

F7:Ib-IIv

+88 8

NV

023149.09+891550.7

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

No records found.


No records found.

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

Radius: auto 0.5" 0.8" 1" 2" 3" 5" 10" 15" 20" 25" 30" 35" 40" 45" 50" 55" 1' 2' 3' 4' 5' 6' 7' 8' 9' 10' 15' 20' 30' 40' 50' 1° 2° 4° 5° 8° Components only

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS

FoV: 30" 1' 5' 15' 30' 1° 2° 4° 5° 8° Limit: 2 3 4 5 10 15 20 25 30 50 100 Primaries only
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 Polaris 02318+8916 WRH 39 Aa,Ab 293 0.1 1 Show Polaris 02318+8916 STF 93 AB 236 18.4 1 Show Polaris 02318+8916 STF 93 AC 103 39.0 1 Show Polaris 02318+8916 STF 93 AD 194 83.2 1 Show 02318+8916 STF 93 BC 83 53.1 1 Show 02318+8916 STF 93 BD 179 69.3 1 Show 02468+8824 LOC 14 194 6.2 53 Show 02379+8806 LOC 51 296 3.4 70 Show 02215+8803 LOC 50 213 3.1 73 Show 02393+8728 LOC 48 224 5.8 108 Show 02283+8708 LOC 49 65 3.8 129 Show 02460+8628 LOC 13 180 4.7 169 Show 02390+8611 TDS2317 190 0.6 186 Show 02438+8536 LOC 12 183 35.0 220 Show 02282+8511 HJ 2110 AB 324 5.1 246 Show 02282+8511 HJ 2110 AC 315 41.2 246 Show 02260+8441 LDS1552 146 3.7 275 Show 02217+8435 MLR 487 270 1.6 281 Show 02344+8418 LOC 47 200 8.2 298

	A	Ab	B	C
Ab	pa=293.0° sep=0.10"
B	pa=226.3° sep=17.52"	pa=226.0° sep=17.48"
C	pa=102.8° sep=39.04"	pa=102.8° sep=39.14"	pa=86.1° sep=50.97"
D	pa=193.7° sep=83.25"	pa=193.6° sep=83.27"	pa=185.9° sep=69.09"	pa=218.7° sep=93.02"

Common name	Polaris		Other names	Lodestar, Cynosura, Alruccabah, Phoenice, Polare, Stella Polare, Tramontana, Angel Stern, Navigatoria, Star of Arcady, Yilduz, Mismar, Polyarnaya		Coord arcsec 2000	023149.09+891550.7		Mag	2.04
Spectral class	F7Ib (yellow-white)		PmRA	38.00		PmDE	-15.0		SAO	308
HIP	11767		Tycho2	4628-00237-1		HD	8890		HR	424
GC	2243		BD	BD+88 8		Bayer	Alpha Ursae Minoris		Bayer name	alp UMi
Flamsteed	1 Ursae Minoris		Flamsteed name	1 UMi		FK5	907

Tycho2	4628-00237-1		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	2.708		E BTmag	0.014		VTmag	2.038
E VTmag	0.009		Prox	999		TYC	T		HIP	11767
CCDM			RAdeg	37.94661861		DEdeg	89.26413528		EpRA 1990	1.69
EpDE 1990	1.75		E RAdeg	3.2		E DEdeg	3.2		Posflg
Corr	0.1

SAO	308		DelFlag			RA1950			PmRA1950	0.1811
DE1950			PmDE1950	-0.004		Vmag	2.1		SpType	F8v
Double code			Source	74		CatNum	907		DM	BD+88 8
DMcomp			BDsup			HD	8890		M HD	0
GC	2243		RA1950rad	0.47478668		DE1950rad	1.55384597		PmRA2000	0.2012
PmDE2000	-0.016

Catalog	H		HIP	11767		Proxy			RAhms	02 31 47.08
DEdms	+89 15 50.9		Vmag	1.97		VarFlag	1		R Vmag	H
RAdeg	37.9461		DEdeg	89.2641		AstroRef			Plx	7.56
CCDM	44.22		N CCDM	I		Nsys	1		Ncomp	1
MultFlag			Source			Qual			M HIP
Theta			Rho			HD			BD	BD+88 8
CD			CP			Dm number	+88 8		VIred	0.68
SpType	F7:Ib-IIv SB		R SpType			Coord arcsec 2000	023147.08+891550.9

HIP	11767		Sn	5		So	0		Nc	1
RArad	0.6622851337		DErad	1.5579531082		Plx	7.54		PmRA	44.48
PmDE	-11.85		E RArad	0.09		E DErad	0.1		E Plx	0.11
E pmRA	0.11		E pmDE	0.13		Hpmag			E Hpmag	0.0021
SHp	0.014		VA	1		BV	0.636		E BV	0.003
VI	0.7

Coord arcsec 2000	023148.62+891550.7		Mag	4.3		Spectral class	IIv		Delta magnitude	2
Coordinate calculated	yes

Coord arcsec 2000	023043.45+891538.6		Coord calc	023043.45+891538.6		Mag	8.6		PmRA	42.00
PmDE	-14.0		Delta magnitude	6.3

Coord arcsec 2000	023506.39+891542.1		Mag	13.8		Spectral class	II		Delta magnitude	11.5
Coordinate calculated	yes

Coord arcsec 2000	023006.83+891429.9		Mag	14.3		Spectral class	II		Delta magnitude	12
Coordinate calculated	yes