00447+4817 BU 231 AB (Omi Cas)

00^h 44^m 43.50^s +48° 17' 03.8" P.A. 302.00 sep 34.4 mag 4.54,11.20 Sp B5IIIe dist. 215.52 pc (703.03 l.y.)

Coord 2000	00447+4817		Discov num	BU 231		Comp	AB		Coord arcsec 2000	00 44 43.50 +48 17 03.8
Date first	1876		Date last	2011		Obs	14
Pa first	304		Pa last	301.6		P.A. Now (θ)	301.6°
Sep first	32.8		Sep last	34.38		Sep. Now (ρ)	34.38"
Mag pri	4.54		Mag sec	11.20		delta mag (ΔM)	6.66		Spectral class	B5IIIe (blue-white)
Pri motion ra	+019		Sec motion ra	+003
Pri motion dec	-007		Sec motion dec	-006
Notes	N (See Notes)

rPM=0.792

Nature of this double is uncertain.

00447+4817 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		36620	00 44 44 +48 17 04	NOI 3 Aa,Ab	2018	15	267	0.0	4.60	7.50	2.90	Y
Show	Omi Cas	36620	00 44 44 +48 17 04	BU 231 AB	2011	14	302	34.4	4.54	11.20	6.66		<===

Triple system
2 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	Omi Cas		Constellation	Cassiopeia		SAO	36620		HIP	3504
Tycho2	3253-01988-1		Gaia DR2	390548351252549760		HD	4180		HR	193
GC	882		ADS	622		BD	BD+47 183		Bayer	Omicron Cassiopeiae
Bayer name	Omi Cas		Flamsteed	22 Cassiopeiae		Flamsteed name	22 Cas		FK5	25
Distance	215.52		Distance ly	703.03		Bayer greek	ο Cas