00177+5126 RBR 22 AD (AO Cas)

Coord 2000	00177+5126		Discov num	RBR  22		Comp	AD		Coord arcsec 2000	00 17 43.06 +51 25 59.1
Date first	2008		Date last	2008		Obs	1
Pa first	317		Pa last	317		P.A. Now (θ)	317°
Sep first	16.3		Sep last	16.295		Sep. Now (ρ)	16.295"
Mag pri	6.37		Mag sec	12.50		delta mag (ΔM)	6.13		Spectral class	O9.2II+ (blue)
Pri motion ra	-004		Sec motion ra
Pri motion dec	-002		Sec motion dec
Notes	N K (See Notes, K-band or other infrared magnitudes)

Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		21273	00 17 43 +51 25 59	TRN 8 AB	2001	2	186	2.8	6.10	15.00	8.90
Show		21273	00 17 43 +51 25 59	MZA 3 AC	2008	3	104	12.8	6.10	13.80	7.70
Show	AO Cas	21273	00 17 43 +51 25 59	RBR 22 AD	2008	1	317	16.3	6.37	12.50	6.13		<===

Quadruple system
4 estimated visually detectable stars in this system

Var name	AO Cas		Constellation	Cassiopeia		SAO	21273		HIP	1415
Tycho2	3259-00394-1		Gaia DR2	394976501194687488		HD	1337		HR	65
GC	345		BD	BD+50 46		Distance	735.29		Distance ly	2398.52