20178+5717 KR   50AB

Coord 2000	20178+5717		Discov num	KR   50		Comp	AB		Coord arcsec 2000	20 17 46.12 +57 17 16.4
Date first	1890		Date last	2016		Obs	16
Pa first	131		Pa last	129		P.A. Now (θ)	129°
Sep first	2.2		Sep last	2.1		Sep. Now (ρ)	2.1"
Mag pri	8.55		Mag sec	9.99		delta mag (ΔM)	1.44		Spectral class	K0 (yellow-orange)
Pri motion ra	+084		Sec motion ra	+084
Pri motion dec	+049		Sec motion dec	+049
Notes

Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 17 46 +57 17 16	KR 50 AB	2016	16	129	2.1	8.55	9.99	1.44		<===
Show			20 17 46 +57 17 16	KR 50 AC	2015	7	73	66.6	8.55	11.54	2.99
Show			20 17 54 +57 17 36	KR 50 CD	2016	2	355	1.7	11.54	12.50	0.96

Quadruple system
4 visible stars in this system

Precise pa	128.5		Precise sep	2.103		Constellation	Cygnus		Tycho2	3945-00886-1
Gaia DR2	2187944477607218944		HD	193511

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20178+5717	KR 50	AB	1997	14	129	2.1	8.55	9.99	K0		201746.12+571716.4
20178+5717	KR 50	AB	2010	15	128	2.0	8.55	9.99	K0		201746.12+571716.4
20178+5717	KR 50	AB	2016	15	129	2.1	8.55	9.99	K0		201746.12+571716.4

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