20178+5717 KR   50AC

Coord 2000	20178+5717		Discov num	KR   50		Comp	AC		Coord arcsec 2000	20 17 46.12 +57 17 16.4
Date first	1898		Date last	2015		Obs	7
Pa first	73		Pa last	73		P.A. Now (θ)	73°
Sep first	75.0		Sep last	66.6		Sep. Now (ρ)	66.6"
Mag pri	8.55		Mag sec	11.54		delta mag (ΔM)	2.99		Spectral class	K0 (yellow-orange)
Pri motion ra	+079		Sec motion ra	+019
Pri motion dec	+054		Sec motion dec	+019
Notes

rPM=0.726 Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20178+5717	KR 50	AB	1890	2016	15	129	2.1	8.55	9.99	1.44
Show			20178+5717	KR 50	AC	1898	2015	7	73	66.6	8.55	11.54	2.99		<===
Show			20178+5717	KR 50	CD	1909	1909	1	102	3.4	11.54	12.50	0.96

Quadruple system
4 visible stars in this system

Precise pa	73.2		Precise sep	66.57		Constellation	Cygnus		Tycho2	3945-00886-1
Gaia DR2	77607218944		HD	193511

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20178+5717	KR 50	AC	1999	5	73	67.5	8.55	11.54		D	201746.12+571716.4
20178+5717	KR 50	AC	2003	6	73	67.2	8.55	11.54		D	201746.12+571716.4
20178+5717	KR 50	AC	2015	7	73	66.6	8.55	11.54	K0		201746.12+571716.4

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