05098+2802 L 54 Aa,Ab

Coord 2000	05098+2802		Discov num	L    54		Comp	Aa,Ab		Coord arcsec 2000	05 09 45.06 +28 01 50.2
Date first	1908		Date last	1908		Obs	1
Pa first	351		Pa last	350.9		P.A. Now (θ)	350.9°
Sep first	0.2		Sep last	0.18		Sep. Now (ρ)	0.18"
Mag pri	6.04		Mag sec			delta mag (ΔM)			Spectral class	A5m (white)
Pri motion ra	+060		Sec motion ra
Pri motion dec	-055		Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		76990	05 09 45 +28 01 50	L 54 Aa,Ab	1908	1	351	0.2	6.04				<===
Show	V1156 Tau	76990	05 09 45 +28 01 50	STF 645 A,BC	2017	69	29	11.3	6.04	9.11	3.07
Show			05 09 45 +28 02 02	BU 1047 BC	2014	45	90	0.3	9.11	9.71	0.60	Y

Quadruple system
4 estimated visually detectable stars in this system

Var name	V1156 Tau		Constellation	Taurus		SAO	76990		HIP	24019
Tycho2	1853-01958-1		Gaia DR2	3422091372924795776		HD	33204		HR	1670
ADS	3730		BD	BD+27 732		FK5	1141		Distance	52.6
Distance ly	171.58

discov_num	notes	refcode
BU 1047	BC: Van Biesbroeck in 1953 noted "no evidence of change in 65 years."
	However, the pair is now apparently in rapid motion in a highly-
	inclined orbit.	Wor1967b
	BC. The star was noted as a spectroscopic binary by Griffin et	Grf1988
	al. (1988).
	Hipparcos identified the pair as a non-Hyades member, however, the	HIP1998
	results invesigating proper motion, photometry and radial velocity	Grf1988
	yield a more ambiguous finding. The jury is still out!	Grf2013c
STF 645	A,BC: HJL 67.	HJL1986
	A,BC: H 3 90.	MEv2010

refcode	metd	author	reference
Grf1988	not -	Griffin, R.F., Griffin, R.E.M., Gunn, J.E., & Zimmerman, B.A.	1988AJ.....96..172G
Grf1988		AJ 96, 172, 1988
Grf2013c	not -	Griffin, R.F.	2013Obs...133..144G
Grf2013c		Observatory 133, 144, 2013
HIP1998	Hh -	Perryman, M.A.C., Brown, A.G.A., Lebreton, Y., Gomez, A., Turon, C., Carel de	1998A&A...331...81P
HIP1998		Strobel, C., Mermilliod, J.C., Robichon, N., Kovalevsky, J. & Crifo, F.
HIP1998		A&A 331, 81, 1998
HJL1986	Pa -	Halbwachs, J.L.	1986A&AS...66..131H
HJL1986		A&AS 66, 131, 1986
HJL1986		(Possible CPM pairs from AGK2/3. Coarse astrometry, incl. mean 1950 dates, added
HJL1986		only for previously unknown pairs. Table 1: HJL 1 - 326, Table 2: HJL1001 - 1113)
MEv2010	-	MacEvoy, B.	...................
MEv2010		private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Wor1967b	Ma j	Worley, C.E.	1967PUSNO..18....1W
Wor1967b		Pub. USNO 18, Pt. 6, 1967

idgroup	discov	author
1	BU	Burnham, S.W. (BU 1 - 81)
179	L	Lewis, T.
262	STF	Struve, F.G.W.

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
05098+2802	L 54	Aa,Ab	1908	1	351	0.2	6.04		A5m	N	050945.06+280150.2

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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

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