21549+6159 OSO 161 AE

Coord 2000	21549+6159		Discov num	OSO 161		Comp	AE		Coord arcsec 2000	21 54 55.27 +61 59 16.2
Date first	1994		Date last	2014		Obs	5
Pa first	305		Pa last	315		P.A. Now (θ)	315°
Sep first	19.3		Sep last	20.406		Sep. Now (ρ)	20.406"
Mag pri	11.64		Mag sec	18.90		delta mag (ΔM)	7.26		Spectral class	K2 (yellow-orange)
Pri motion ra	-074		Sec motion ra
Pri motion dec	-172		Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			21 54 55 +61 59 16	OSO 161 AB	2014	5	335	14.8	11.64	19.00	7.36
Show			21 54 55 +61 59 16	OSO 161 AC	2015	4	36	21.8	9.85	16.50	6.65
Show			21 54 55 +61 59 16	OSO 161 AD	2003	3	19	19.8	11.64	16.60	4.96
Show			21 54 55 +61 59 16	OSO 161 AE	2014	5	315	20.4	11.64	18.90	7.26		<===

Quintuple system
5 estimated visually detectable stars in this system

Constellation

Cepheus

Gaia DR2

2204280918303856640

discov_num	notes	refcode
OSO 161	G264-015. None is a common proper motion pair, based on comparison
	with POSS2 red plates.	Oso2004

refcode	metd	author	reference
Oso2004	C j	Zapatero Osorio, M.R. & Martin, E.L.	2004A&A...419..167Z
Oso2004	+Pa	A&A 419, 167, 2004

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
21549+6159	OSO 161	AE	1999	2	307	19.5	11.64	18.90		N D	215455.27+615916.2
21549+6159	OSO 161	AE	2014	5	315	20.4	11.64	18.90	K2	N	215455.27+615916.2

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Radius: auto 0.5" 0.8" 1" 2" 3" 5" 10" 15" 20" 25" 30" 35" 40" 45" 50" 55" 1' 2' 3' 4' 5' 6' 7' 8' 9' 10' 15' 20' 30' 40' 50' 1° 2° 4° 5° 8° Components only

DSS color DSS blue 2MASS AllWISE GALEX SDSS9 XMM PanSTARRS