19557+4451 KOI 105 AC

Coord 2000	19557+4451		Discov num	KOI 105		Comp	AC		Coord arcsec 2000	19 55 44.89 +44 51 28.5
Date first	2010		Date last	2015		Obs	4
Pa first	18		Pa last	20.8		P.A. Now (θ)	20.8°
Sep first	3.8		Sep last	4.005		Sep. Now (ρ)	4.005"
Mag pri	11.20		Mag sec	17.60		delta mag (ΔM)	6.4		Spectral class
Pri motion ra	-038		Sec motion ra
Pri motion dec	-007		Sec motion dec
Notes	K (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			19 55 45 +44 51 28	KOI 105 AB	2012	2	159	0.9	11.20	15.00	3.80
Show			19 55 45 +44 51 28	KOI 105 AC	2015	4	21	4.0	11.20	17.60	6.40		<===
Show			19 55 45 +44 51 28	KOI 105 AD	2012	1	156	5.6	11.20	19.10	7.90

Quadruple system
4 estimated visually detectable stars in this system

Constellation

Cygnus

Gaia DR2

2079192121810035840