20215+3035 ARY   4AB

Coord 2000	20215+3035		Discov num	ARY   4		Comp	AB		Coord arcsec 2000	20 21 29.56 +30 35 25.0
Date first	1900		Date last	2015		Obs	17
Pa first	288		Pa last	287		P.A. Now (θ)	287°
Sep first	135.1		Sep last	134.9		Sep. Now (ρ)	134.9"
Mag pri	6.78		Mag sec	8.54		delta mag (ΔM)	1.76		Spectral class	Am (white)
Pri motion ra	+012		Sec motion ra	+008
Pri motion dec	+022		Sec motion dec	+010
Notes

rPM=0.505 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		69888	20215+3035	ARY 4	AB	1900	2015	17	287	134.9	6.78	8.54	1.76		<===
Show		69879	20215+3035	BU 1259	Ba,Bb	1891	1991	26	191	0.2	9.06	9.60	0.54
Show		69879	20215+3035	BU 1259	BC	1916	2012	9	356	10.3	8.54	13.50	4.96

Quadruple system
3 visible stars in this system

Precise pa	286.5		Precise sep	134.857		Constellation	Cygnus		SAO	69888
HIP	100384		Tycho2	2672-02202-1		Gaia DR2	92186372864		HD	193857
BD	BD+30 3998		Distance	114.29		Distance ly	372.81

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20215+3035	ARY 4	AB	2000	11	287	134.5	6.78	8.54	Am	D	202129.56+303525.0
20215+3035	ARY 4	AB	2010	12	287	134.8	6.78	8.54	Am	D	202129.56+303525.0
20215+3035	ARY 4	AB	2012	15	286	134.5	6.78	8.54	Am	D	202129.56+303525.0
20215+3035	ARY 4	AB	2015	16	287	134.9	6.78	8.54	Am		202129.56+303525.0

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