00550+5824 BKO 147AC

Coord 2000	00550+5824		Discov num	BKO 147		Comp	AC		Coord arcsec 2000	00 55 02.46 +58 23 31.3
Date first	1998		Date last	2015		Obs	8
Pa first	19		Pa last	19		P.A. Now (θ)	19°
Sep first	51.1		Sep last	51.1		Sep. Now (ρ)	51.1"
Mag pri	10.83		Mag sec	13.20		delta mag (ΔM)	2.37		Spectral class
Pri motion ra	+017		Sec motion ra	-001
Pri motion dec	-008		Sec motion dec	-007
Notes	U (Proper motion indicates non-physical)

Visually invisible, K-band or other infrared star rPM=0.96 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			00550+5824	STI1472	AB	1910	2015	12	2	14.2	10.83	11.50	0.67
Show			00550+5824	BKO 147	AC	1998	2015	8	19	51.1	10.83	13.20	2.37		<===
Show			00550+5824	BKO 147	CD	1998	2015	8	79	10.8	13.20	14.20	1.00

Quadruple system
4 visible stars in this system

Precise pa	18.5		Precise sep	51.1		Constellation	Cassiopeia		Tycho2	3680-00592-1
Gaia DR2	0898567424

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00550+5824	BKO 147	AC	2003	2	19	51.3	10.83	13.20		D	005502.46+582331.3
00550+5824	BKO 147	AC	2010	3	19	51.6	10.83	13.20		UD	005502.46+582331.3
00550+5824	BKO 147	AC	2015	5	19	51.1	10.83	13.20		U	005502.46+582331.3

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