00528+5638 BKO 139AO

Coord 2000	00528+5638		Discov num	BKO 139		Comp	AO		Coord arcsec 2000	00 52 49.22 +56 37 39.5
Date first	1918		Date last	2015		Obs	7
Pa first	300		Pa last	296		P.A. Now (θ)	296°
Sep first	36.2		Sep last	33.6		Sep. Now (ρ)	33.6"
Mag pri	8.58		Mag sec	14.00		delta mag (ΔM)	5.42		Spectral class	O6.5V (blue)
Pri motion ra	+008		Sec motion ra
Pri motion dec	+001		Sec motion dec
Notes	N (See Notes)

Visually invisible, K-band or other infrared star Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			00528+5638	BU 1	AB	1872	2016	29	83	1.5	8.58	9.33	0.75
Show			00528+5638	BU 1	AC	1871	2020	36	134	3.9	8.58	8.89	0.31
Show			00528+5638	BU 1	AD	1871	2020	38	195	8.9	8.58	9.66	1.08
Show			00528+5638	BU 1	AE	1888	2015	18	333	15.8	8.58	12.10	3.52
Show			00528+5638	ABH 5	AB,F	1911	2012	12	233	51.4	8.32	11.30	2.98
Show			00528+5638	ABH 5	AB,G	1910	2012	12	240	56.1	8.32	12.20	3.88
Show			00528+5638	ABH 5	AB,H	1910	2012	10	146	74.3	8.32	12.30	3.98
Show			00528+5638	ABH 5	AB,I	1918	2012	9	160	45.4	8.32	13.34	5.02
Show			00528+5638	BKO 139	AK	1998	2015	5	60	22.5	8.58	15.20	6.62
Show			00528+5638	BKO 139	AL	1953	2015	6	11	28.6	8.58	14.20	5.62
Show			00528+5638	BKO 139	AM	1953	2012	5	277	33.5	8.58	14.10	5.52
Show			00528+5638	BKO 139	AN	1918	2015	7	48	32.6	8.58	13.90	5.32
Show			00528+5638	BKO 139	AO	1918	2015	7	296	33.6	8.58	14.00	5.42		<===
Show			00528+5638	SS 2	AQ	1953	2015	4	120	22.9	8.58	14.90	6.32
Show			00528+5638	BU 1	CD	1871	2020	33	220	7.8	8.89	9.66	0.77
Show			00528+5638	STI1454	FG	1911	2015	12	310	11.0	11.30	12.20	0.90
Show			00528+5638	BKO 139	FJ	1998	2015	7	45	14.8	11.30	14.60	3.30

16-fold system
17 visible stars in this system

Precise pa	296.2		Precise sep	33.607		Constellation	Cassiopeia		HIP	4121
Tycho2	3663-01231-1		Gaia DR2	4880147456		HD	5005		BD	BD+55 191
Distance	3030.3		Distance ly	9884.84

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
00528+5638	BKO 139	AO	2003	2	296	33.9	8.58	14.00		D	005249.20+563739.6
00528+5638	BKO 139	AO	2012	5	296	34.4	8.58	14.00	O6.5V	N	005249.22+563739.5
00528+5638	BKO 139	AO	2015	7	296	33.6	8.58	14.00	O6.5V	N	005249.22+563739.5

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