00251+4803 SOZ 4 AB,D (HD 2057)

Coord 2000	00251+4803		Discov num	SOZ   4		Comp	AB,D		Coord arcsec 2000	00 25 08.74 +48 02 51.0
Date first	2015		Date last	2015		Obs	2
Pa first	259		Pa last	258.6		P.A. Now (θ)	258.6°
Sep first	13.8		Sep last	13.826		Sep. Now (ρ)	13.826"
Mag pri	6.38		Mag sec	12.50		delta mag (ΔM)	6.12		Spectral class	F8+M5 (yellow-white/red)
Pri motion ra	+274		Sec motion ra	+283
Pri motion dec	+011		Sec motion dec	-003
Notes	N V K (See Notes, Proper motion indicates physical, 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 rPM=0.059 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		36347	00 25 09 +48 02 51	HDS 56 AB	2013	17	273	0.3	7.72	10.63	2.91	Y
Show		36347	00 25 09 +48 02 51	CRZ 2 AC	2015	2	193	121.2	7.53	14.70	7.17
Show	HD 2057	36347	00 25 09 +48 02 51	SOZ 4 AB,D	2015	2	259	13.8	6.38	12.50	6.12		<===
Show			00 25 04 +47 59 19	RED 14 Ca,Cb	2005	2	233	0.3	16.23	16.40	0.17

Quintuple system
5 estimated visually detectable stars in this system

Name	HD 2057		Constellation	Cassiopeia		SAO	36347		HIP	1987
Tycho2	3252-00597-1		Gaia DR2	392562179817077120		HD	2057		BD	BD+47 88
Distance	43.82		Distance ly	142.94