00550+5858 BU 1098AC

Coord 2000	00550+5858		Discov num	BU 1098		Comp	AC		Coord arcsec 2000	00 55 00.19 +58 58 22.1
Date first	1910		Date last	2015		Obs	7
Pa first	128		Pa last	125		P.A. Now (θ)	125°
Sep first	93.0		Sep last	93.8		Sep. Now (ρ)	93.8"
Mag pri	4.96		Mag sec	12.89		delta mag (ΔM)	7.93		Spectral class	K2III (yellow-orange)
Pri motion ra	-034		Sec motion ra	+000
Pri motion dec	-041		Sec motion dec	-002
Notes	N W (See Notes, )

Visually invisible, K-band or other infrared star rPM=0.971 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	Ups1 Cas	21832	00550+5858	BU 1098	AB	1889	2015	8	63	18.0	4.96	12.50	7.54
Show		21832	00550+5858	BU 1098	AC	1910	2015	7	125	93.8	4.96	12.89	7.93		<===

Triple system
3 visible stars in this system

Precise pa	125.3		Precise sep	93.84		Constellation	Cassiopeia		SAO	21832
HIP	4292		Tycho2	3680-01840-1		Gaia DR2	3349543040		HD	5234
HR	253		GC	1086		BD	BD+58 134		Bayer	Upsilon 1 Cassiopeiae
Bayer name	Ups1 Cas		Flamsteed	26 Cassiopeiae		Flamsteed name	26 Cas		Distance	100.7
Distance ly	328.48

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00550+5858	BU 1098	AC	1998	5	126	93.6	5.00	11.80		N D	005500.19+585822.1
00550+5858	BU 1098	AC	2003	6	125	93.3	5.00	11.80		N D	005500.19+585822.1
00550+5858	BU 1098	AC	2015	7	125	93.8	4.96	12.89	K2III	N	005500.19+585822.1

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