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00528+5638
BKO 139 AO

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

00528+5638 BKO 139 AO

00^h 52^m 49.22^s +56° 37' 39.5" P.A. 296.00 sep 33.6 mag 8.58,14.00 Sp O6.5V dist. 3030.3 pc (9884.84 l.y.)

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	296.2		P.A. Now (θ)	296.2°
Sep first	36.2		Sep last	33.607		Sep. Now (ρ)	33.607"
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)

Nature of this double is uncertain.

00528+5638 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			00 52 49 +56 37 40	BU 1 AB	2018	33	82	1.5	8.58	9.33	0.75
Show			00 52 49 +56 37 40	BU 1 AC	2020	37	134	3.9	8.58	8.89	0.31
Show			00 52 49 +56 37 40	BU 1 AD	2020	39	195	8.9	8.58	9.66	1.08
Show			00 52 49 +56 37 40	BU 1 AE	2015	18	333	15.8	8.58	12.10	3.52
Show	HD 5005		00 52 49 +56 37 40	ABH 5 AB,F	2012	12	233	51.4	8.32	11.30	2.98
Show			00 52 49 +56 37 40	ABH 5 AB,G	2012	12	240	56.1	8.32	12.20	3.88
Show			00 52 49 +56 37 40	ABH 5 AB,H	2012	10	146	74.3	8.32	12.30	3.98
Show			00 52 49 +56 37 40	ABH 5 AB,I	2012	9	160	45.4	8.32	13.34	5.02
Show			00 52 49 +56 37 40	BKO 139 AK	2015	5	60	22.5	8.58	15.20	6.62
Show			00 52 49 +56 37 40	BKO 139 AL	2015	6	11	28.6	8.58	14.20	5.62
Show			00 52 49 +56 37 40	BKO 139 AM	2012	5	277	33.5	8.58	14.10	5.52
Show			00 52 49 +56 37 40	BKO 139 AN	2015	7	48	32.6	8.58	13.90	5.32
Show			00 52 49 +56 37 40	BKO 139 AO	2015	7	296	33.6	8.58	14.00	5.42		<===
Show			00 52 49 +56 37 40	SS 2 AQ	2015	4	120	22.9	8.58	14.90	6.32
Show			00 52 50 +56 37 37	BU 1 CD	2020	33	220	7.8	8.89	9.66	0.77
Show			00 52 44 +56 37 04	STI 1454 FG	2015	12	310	11.0	11.30	12.20	0.90
Show			00 52 44 +56 37 04	BKO 139 FJ	2015	7	45	14.8	11.30	14.60	3.30

16-fold system
17 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Cassiopeia		HIP	4121		Tycho2	3663-01231-1		Gaia DR2	423818404880147456
HD	5005		BD	BD+55 191		Distance	3030.3		Distance ly	9884.84