13100+1732 STF 1728 AB (Diadem)

Coord 2000	13100+1732		Discov num	STF1728		Comp	AB		Coord arcsec 2000	13 09 59.28 +17 31 46.0
Date first	1827		Date last	2021		Obs	669
Pa first	190		Pa last	192.1		P.A. Now (θ)	355.2° (calc)
Sep first	0.6		Sep last	0.402		Sep. Now (ρ)	0.003" (calc)
Mag pri	4.85		Mag sec	5.53		delta mag (ΔM)	0.68		Spectral class	F5V+F6V (yellow-white/yellow-white)
Pri motion ra	-433		Sec motion ra	-430
Pri motion dec	+141		Sec motion dec	+138
Notes	N O (See Notes, Orbital solution)

rPM=0.009 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Diadem	100443	13 09 59 +17 31 46	STF 1728 AB	2021	669	192	0.4	4.85	5.53	0.68	Y	<===
Show	Alp Com	100443	13 09 59 +17 31 46	STF 1728 AB,C	2023	15	353	82.9	4.43	11.45	7.02

Triple system
2 estimated visually detectable stars in this system

Common name	Diadem		Var name	NSV6116 Com		Constellation	Coma Berenices		SAO	100443
HIP	64241		Tycho2	1454-01134-1		HD	114378		HR	4968
GC	17833		ADS	8804		BD	BD+18 2697		Bayer	Alpha Comae Berenices
Bayer name	Alp Com		Flamsteed	42 Comae Berenices		Flamsteed name	42 Com		Distance	17.83
Distance ly	58.16		Bayer greek	α Com

Other names

DIADEMA

Meaning

tiara

Period (P)	9442.4d (25.85y)	± 3	Periastron (T)	57056.84m (2015.094y)	± 0.36	Semi-major axis (a)	0.67144a	± 0.00033
Eccentricity (e)	0.5106	± 0.00061	Inclination (i)	90.0501°	± 0.0062	Longitude of periastron (ω)	280.563°	± 0.026
Node (Ω)	12.2272°	± 0.0098	Notes	n		Reference	Mut2015
Equinox	2000		Last observation	2015		Grade	1	(1=Definitive, 9=Indet.)

label theta rho 2000 9.3 0.017 2001 192.9 0.078 2002 192.5 0.171 2003 192.4 0.261 2004 192.4 0.346 2005 192.3 0.426 2006 192.3 0.497 2007 192.3 0.558 2008 192.3 0.605 2009 192.3 0.635 2010 192.3 0.643 2011 192.2 0.621 2012 192.2 0.558 2013 192.2 0.437 2014 192.2 0.238 2015 12.7 0.034 2016 12.3 0.288 2017 12.2 0.443 2018 12.2 0.509 2019 12.2 0.515 2020 12.2 0.484 2021 12.2 0.430 2022 12.1 0.359 2023 12.1 0.278 2024 12.0 0.189 2025 11.7 0.097 2026 355.4 0.003 2027 192.8 0.091 2028 192.5 0.184 2029 192.4 0.274 2030 192.4 0.358 2031 192.3 0.437 2032 192.3 0.507 2033 192.3 0.565 2034 192.3 0.611 2035 192.3 0.638 2036 192.3 0.642 2037 192.2 0.615 2038 192.2 0.544 2039 192.2 0.413 2040 192.2 0.201 2041 12.4 0.075 2042 12.3 0.318 2043 12.2 0.458 2044 12.2 0.513 2045 12.2 0.512 2046 12.2 0.478 2047 12.1 0.420 2048 12.1 0.347 2049 12.1 0.265 2050 12.0 0.176

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. Measures: green=micrometric, blue=interferometric, purple=photographic

discov_num	notes	refcode
STF1728	42 Com = alp Com = Diadem.	Baz1964
	AB: Additional notes may be found in Madler (1844).	Mad1844
	AB. A preliminary orbit for this edge-on pair indicates that one of
	the F5 V stars may partially eclipse the other in early 1990.
	Components reversed rel std sol's, e.g. in Hartkopf et al.	Hrt1989
	(1989). Their preliminary orbit for this edge-on pair indicated that
	one F5V star may have partially eclipsed the other in early 1990.
	See Baize & Petit (1989) catalog of doubles with variable component.	Baz1989d
	1997.1179: The magnitude difference of the system is listed in the WDS
	as 0.0. Our reduction does not give the quadrant unambiguously, so we
	adopt the quadrant that gives a position angle consistent with
	previous measures in the WDS.	Hor1997
	Spectral types amd masses of components assigned by ten Brummelaar et
	al., based on adaptive optics observations.	TtB2000
	Calculated mass sum is 2.45 +/- 0.18 Msun, reasonable for two F5
	dwarfs. Closest approach of about 0.32 mas is predicted around 2015
	Jan 24 (to within about a week), eclipse duration ~1.5 days.	Mut2010b
	Muterspaugh et al. (2015) revised their orbit, following discovery of	Mut2015
	three old measures whose theta measures had incorrect quadrants, which
	had led to an incorrect prediction of the eclipse timing.

refcode	metd	author	reference
Baz1964	Ma -	Baize, P.	1964JO.....47....1B
Baz1964	+orb	J. Obs. 47, 1-26, 1964
Baz1989d	-	Baize, P. & Petit, M.	1989A&AS...77..497B
Baz1989d		A&AS 77, 497, 1989
Hor1997	S j	Horch, E.P., Ninkov, Z., & Slawson, R.	1997AJ....114.2117H
Hor1997		AJ 114, 2117, 1997
Hrt1989	orb -	Hartkopf, W.I., McAlister, H.A., & Franz, O.G.	1989AJ.....98.2275B
Hrt1989		AJ 98, 1014, 1989
Mad1844	Ma -	Maedler, J.H.	.
Mad1844		Dorpat Observations 11, 3, 1844
Mut2010b	Kp -	Muterspaugh, M.W., Hartkopf, W.I., Lane. B.F., O'Connell, J., Williamson, M.,	2010AJ....140.1623M
Mut2010b		Kulkarni, S.R., Konacki, M., Burke, B.F., Colavita, M.M., Shao, M., &
Mut2010b		Wiktorowicz, S.J.
Mut2010b		AJ 140, 1623, 2010
Mut2015	Kf j	Muterspaugh, M.W., Mijngaarden, M.J.P., Henrichs, H.F., Lane, B.F., Hartkopf, W.,	2015AJ....150..140M
Mut2015	+Kn	Henry, G.W., Schaefer, G.H., Farrington, C., Hummel, C.A., & Zavala, R.T.
Mut2015	+orb	AJ 150, 140, 2015
TtB2000	Ac j	ten Brummelaar, T.A., Mason, B.D., McAlister, H.A., Roberts, L.C., Jr.,	2000AJ....119.2403T
TtB2000		Turner, N.H., Hartkopf, W.I., & Bagnuolo, W.G., Jr.
TtB2000		AJ 119, 2403, 2000 (magnitude differences from Mt. Wilson AO)

discov	author
BAZ	Baize, P.
HOR	Horch, E.P., Robinson, S.E., Ninkov, Z., van Altena, W.F., Meyer, R.D.,
HOR	Urban, S.E., & Mason, B.D.
HOR	Horch, E.P. Davidson, J.W., Jr., van Altena, W.F., Girard, T.M., Lopez, C.E.,
HOR	Franz, O.G., & Timothy, J.G.
HOR	Horch, E.P., van Altena, W.F., Cyr, W.M., Jr., Kinsman-Smith, L., Srivastava, A.,
HOR	& Zhou, J.
HOR	Horch, E.P., Gomez, S.C., Sherry, W.H., Howell, S.B., Ciardi, D.R.,
HOR	Anderson, L.M., & van Altena, W.F.
HOR	Horch, E.P., Bahi, L.A.P., Gaulin, J.R., Howell, S.B., Sherry, W.H., Galle, R.B.,
HOR	& van Altena, W.F.
HOR	Horch, E.P., van Altena, W.F., Demargue, P., Howell, S.B., Everett, M.E.,
HOR	Ciardi, D.R., Teske, J.K., Henry, T.J., & Winters, J.G.
HOR	Horch, E.P., Casetti-Dinescu, D.I., Camarata, M.A., Bidarian, A.,
HOR	van Altena, W.F., Sherry, W.H., Everett, M.E., Howell, S.B., Ciardi, D.R.,
HOR	Henry, T.J., Nusdeo, D.A., & Winters, J.G.
HOR	Horch, E.P., Tokovinin, A., Weiss, S.A., Lobb, J., Casetti-Dinescu, D.I.,
HOR	Horch, E.P., van Belle, G.T., Davidson, J.W., Jr., Willmarth, D., Fekel, F.C.,
HOR	Colton, N.M., Horch, E.P., Everett, M.E., Howell, S.B., Davidson, J.W., Jr.,
HOR	Horch, E.P., Broderick, K.G., Casetti-Dinescu, D.I., Henry, T.J., Fekel, F.C.,
HOR	Kalari, V.M., Horch, E.P., Salinas, R., Vink, J.S., Andersen, M., Bestenlehner,
HRT	Hartkopf, W.I. & McAlister, H.A.
HRT	Hartkopf, W.I., McAlister, H.A., Mason, B.D., ten Brummelaar, T.A., Roberts, J.C.,
HRT	Jr., Turner, N.H., & Wilson, J.W.
HRT	Hartkopf, W.I., W.I., Mason, B.D., Gies, D.R., ten Brummelaar, T.,
HRT	McAlister, H.A., Moffat, A.F.J., Shara, M.M., & Wallace, D.J.
HRT	Mason, B.D., Martin, C., Hartkopf, W.I., Barry, D.J., Germain, M.E.,
HRT	Douglass, G.G., Worley, C.E., ten Brummelaar, T.A., et al.
HRT	Hartkopf, W.I., Mason, B.D., McAlister, H.A., Roberts, L.C., Jr., Turner, N.H.,
HRT	ten Brummelaar, T.A., Prieto, C.M., Ling, J.F., & Franz, O.G.
HRT	Mason, B.D., Henry, T.J., Soderblom. D.R., Hartkopf, W.I., Holdenreid, E.R.,
HRT	Rafferty, T.J., & Urban, S.E.
MUT	Muterspaugh, M.W., Lane, B.F., Konacki, M., Burke, B.F., Colavita, M.M.,
MUT	Kulkarni, S.R., & Shao, M.
MUT	Muterspaugh, M.W., Lane, B.F., Konacki, M., Wiktorowicz, S., Burke, B.F.,
MUT	Colavita, M.M., Kulkarni, S.R., & Shao, M.
MUT	Muterspaugh, M.W., Lane, B.F., Konacki, M., Burke, B.F., Colavita, M.M.,
MUT	Kulkarni, S.R., & Shao, M.
MUT	Muterspaugh, M.W., Lane, B.F., Fekel, F.C., Konacki, M., Burke, B.F.,
MUT	Kulkarni, S.R., Colavita, M.M., Shao, M., & Wiktorowicz, S.J.
MUT	Muterspaugh, M.W., Lane, B.F., Kulkarni, S.R., Konacki, M., Burke, B.F.,
MUT	Colavita, M.M., Shao, M., & Wiktorowicz, S.J.
MUT	AJ 140, 1579, 2010 (some data also in Mut2005, Mut2006,
MUT	Mut2006b, Lne2007, or Mut2008)
MUT	Muterspaugh, M.W., Hartkopf, W.I., Lane. B.F., O'Connell, J., Williamson, M.,
MUT	Kulkarni, S.R., Konacki, M., Burke, B.F., Colavita, M.M., Shao, M., &
MUT	Muterspaugh, M.W., Lane. B.F., Kulkarni, S.R., Konacki, M., Burke, B.F.,
MUT	Colavita, M.M., & Shao, M.
MUT	Muterspaugh, M.W., Fekel, F.C., Lane, B.F., Hartkopf, W.I., Kulkarni, S.R.,
MUT	Konacki, M., Burke, B.F., Colavita, M.M., Shao, M., & Williamson, M.
MUT	Muterspaugh, M.W., Lane, B.F., Kulkarni, S.R., Konacki, M., Burke, B.F.,
MUT	Colavita, M.M., Shao, M., Hartkopf, W., Boss, A.P., & Williamson, M.
MUT	Muterspaugh, M.W., Mijngaarden, M.J.P., Henrichs, H.F., Lane, B.F., Hartkopf, W.,
MUT	Henry, G.W., Schaefer, G.H., Farrington, C., Hummel, C.A., & Zavala, R.T.
TTB	ten Brummelaar, T.A., Mason, B.D., Bagnuolo, W.G., Jr., Hartkopf, W.,
TTB	McAlister, H.A., & Turner, N.H.
TTB	ten Brummelaar, T.A., Mason, B.D., McAlister, H.A., Roberts, L.C., Jr.,
TTB	Turner, N.H., Hartkopf, W.I., & Bagnuolo, W.G., Jr.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	dm_number	notes	coord_arcsec_2000
13100+1732	STF1728	AB	2008	618	12	0.6	4.85	5.53	F5V+F6V	+18 2697	NOD	130959.55+173144.8
13100+1732	STF1728	AB	2010	624	11	0.6	4.85	5.53	F5V+F6V	+18 2697	NOD	130959.55+173144.8
13100+1732	STF1728	AB	2011	657	12	0.6	4.85	5.53	F5V F6V	+18 2697	NOD	130959.55+173144.8
13100+1732	STF1728	AB	2014	629	12	0.1	4.85	5.53	F5V F6V	+18 2697	NOD	130959.55+173144.8
13100+1732	STF1728	AB	2015	642	193	0.0	4.85	5.53	F5V+F6V	+18 2697	NOD	130959.55+173144.8
13100+1732	STF1728	AB	2019	655	193	0.6	4.85	5.53	F5V+F6V	+18 2697	NO	130959.28+173146.0
13100+1732	STF1728	AB	2020	657	195	0.5	4.85	5.53	F5V+F6V	+18 2697	NO	130959.28+173146.0
13100+1732	STF1728	AB	2021	669	192	0.4	4.85	5.53	F5V+F6V	+18 2697	NO	130959.28+173146.0

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

Show	date	username	difficulty	separation	pa_estim	interest	notes
Show	21/06/04	Adam Long	difficut	elongated	200	very interesting	Notched rod, possible hairline split at best moments, PA clear and legible most of the time with pri/sec position fairly unambiguous. Just able to detect duplicity at lower mags

No records found.

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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
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Show name coord_2000 discov# comp pa sep dist(') Show Diadem 13100+1732 STF1728 AB 192 0.4 1 Show 13100+1732 STF1728 AB,C 353 82.9 1 Show 13094+1715 GOM 36 225 501.2 19 Show 13104+1710 CVR1488 108 4.0 23 Show 13086+1710 BPMA 45 326 151.3 31 Show 13123+1731 PAT 47 27 3.3 34 Show 13124+1743 GWP1938 202 169.7 36 Show 13131+1801 S 648 69 88.2 55 Show 13119+1823 LDS 947 117 453.7 58 Show 13102+1831 CVR1487 322 3.0 59 Show 13135+1656 SLW 837 77 55.9 62 Show 13143+1743 GWP1948 326 50.0 63 Show 13144+1732 CBL 415 341 20.0 64 Show 13147+1750 LDS4331 189 23.2 69 Show 13152+1729 PLA 5 32 0.6 76 Show 13047+1736 BPM 600 200 79.3 76 Show 13149+1700 GWP1952 325 188.3 77 Show 13133+1621 DOC 1 269 0.1 85 Show 13150+1824 GWP1955 327 486.7 89 Show 13062+1621 HEI 370 287 1.0 90 Show 13122+1608 A 2225 85 2.4 90 Show 13163+1715 STF1733 128 4.9 93 Show 13171+1739 GWP1962 64 203.5 103 Show 13169+1701 BU 800 AB 104 7.7 103 Show 13169+1701 BU 800 AC 334 128.2 103 Show 13169+1701 BU 800 AD 74 35.2 103 Show 13136+1903 CVR1494 356 4.1 105 Show 13046+1614 UC 2469 211 40.6 110 Show 13114+1543 SLN 78 143 9.9 111 Show 13153+1612 SLE 917 299 28.3 111 Show 13179+1737 LDS4339 320 5.8 113 Show 13166+1838 UC 2511 58 44.9 116 Show 13171+1829 SLW 847 292 132.9 116 Show 13059+1549 GRV 862 206 27.4 118 Show 13129+1925 KPP 971 260 7.9 121 Show 13084+1529 STF1722 337 2.7 125 Show 13182+1650 KPP3891 355 1.5 125 Show 13154+1911 LDS4332 6 136.5 125 Show 13013+1748 COU 297 200 0.1 126 Show 13105+1938 KPP3888 196 1.8 127 Show 13162+1556 CBL 417 273 19.3 131 Show 13193+1759 LDS4345 268 39.9 136 Show 13042+1924 STF1715 231 7.3 140 Show 13006+1822 BU 112 A,BC 0 138.5 143 Show 13020+1857 SLW 812 38 54.4 143 Show 13006+1822 BU 112 BC 300 2.1 144 Show 12599+1743 GWP1887 314 33.7 145 Show 13197+1642 BRT1279 292 4.5 148 Show 13203+1746 A 2166 AB 354 0.1 148 Show 13203+1746 A 2166 AC 226 2.2 148 Show 13065+1959 SLW 824 289 15.7 156

	A	B
B	pa=192.1° sep=0.40"
C	pa=352.5° sep=82.85"	pa=352.6° sep=83.23"

Common name	Diadem		Meaning	tiara		Other names	DIADEMA		Coord arcsec 2000	130959.28+173146.0
Mag	4.85		Spectral class	F5V (yellow-white)		PmRA	-433.00		PmDE	141.0
SAO	63374		HIP	64241		Tycho2	1454-01134-1		HD	114378
HR	4968		BD	BD+18 2697		Bayer	Alpha Comae Berenices		Bayer name	alp Com
Flamsteed	42 Comae Berenices		Flamsteed name	42 Com

Tycho2	1454-01134-1		Pflag			RAmdeg	197.49702877		DEmdeg	17.52944436
PmRA	-430.1		PmDE	137.8		E RAmdeg	4		E DEmdeg	4
E pmRA	0.9		E pmDE	0.9		EpRAm	1991.34		EpDEm	1991.24
Num	17		Q RAmdeg	1.5		Q DEmdeg	1.2		Q pmRA	1.6
Q pmDE	1.2		BTmag	4.915		E BTmag	0.014		VTmag	4.427
E VTmag	0.009		Prox	999		TYC			HIP	64241
CCDM			RAdeg	197.49807139		DEdeg	17.52912194		EpRA 1990	1.68
EpDE 1990	1.58		E RAdeg	3.6		E DEdeg	3.8		Posflg	P
Corr	0.2

SAO	63374		DelFlag			RA1950			PmRA1950	-0.0016
DE1950			PmDE1950	-0.002		Vmag	6.2		SpType	B9
Double code			Source	70		CatNum	17829		DM	BD+39 2611
DMcomp			BDsup			HD	114376		M HD	0
GC	17829		RA1950rad	3.43568475		DE1950rad	0.67718276		PmRA2000	-0.0014
PmDE2000	0.003

Catalog	H		HIP	64241		Proxy			RAhms	13 09 59.55
DEdms	+17 31 44.8		Vmag	4.32		VarFlag			R Vmag	G
RAdeg	197.498		DEdeg	17.5291		AstroRef			Plx	69.81
CCDM	-445.95		N CCDM	I		Nsys	1		Ncomp	1
MultFlag	X		Source			Qual	S		M HIP
Theta			Rho			HD			BD	BD+18 2697
CD			CP			Dm number	+18 2697		VIred	0.53
SpType	F5V		R SpType			Coord arcsec 2000	130959.55+173144.8

HIP	64241		Sn	1		So	2		Nc	1
RArad	3.4469925602		DErad	0.3059407189		Plx	56.1		PmRA	-433.13
PmDE	141.24		E RArad	0.72		E DErad	0.64		E Plx	0.89
E pmRA	0.7		E pmDE	0.51		Hpmag			E Hpmag	0.0008
SHp	0.006		VA	0		BV	0.455		E BV	0.008
VI	0.53

Ccdm	13100+1732		RComp			Comp	A		Note1
Note2			Discov num			DRAs	-1.23		DDEs	-11.4
R dRAs	65		Year			Theta			Rho
Obs	3		Vmag	5.2		Sp	F5		PmNote	*
PmRA	-432		PmDE	131		Dm number	+18 2697		Cat1	BD
Name2	+17 1350		Cat2	AGK2/3		HD	114378		M HD
ADS BDS	A 8804		M ADS BDS			N IDS			IDS	13051N1803A
HIC	64241

Coord arcsec 2000	130959.27+173145.6		Mag	5.53		Spectral class	F6V (yellow-white)		PmRA	-430.00
PmDE	138.0		Delta magnitude	0.68		Coordinate calculated	yes

Ccdm	13100+1732		RComp			Comp	B		Note1	*
Note2			Discov num	STF1728		DRAs			DDEs
R dRAs			Year	1827		Theta			Rho
Obs	99		Vmag	5.2		Sp	F5		PmNote
PmRA			PmDE			Dm number			Cat1
Name2			Cat2			HD	114379		M HD
ADS BDS	A 8804		M ADS BDS			N IDS			IDS	13051N1803B
HIC	64241

Coord arcsec 2000	130958.52+173308.1		Mag	11.45		PmRA	-12.00		PmDE	-1.0
Delta magnitude	6.6		Coordinate calculated	yes

Ccdm	13100+1732		RComp			Comp	C		Note1
Note2			Discov num	STF1728		DRAs	-2.22		DDEs	71.8
R dRAs	65		Year	1923		Theta	330		Rho	110.3
Obs	6		Vmag	10.2		Sp			PmNote
PmRA			PmDE			Dm number			Cat1
Name2			Cat2			HD			M HD
ADS BDS	A 8804		M ADS BDS			N IDS			IDS	13051N1803C
HIC