20215+3035 BU 1259 Ba,Bb

20^h 21^m 19.55^s +30° 36' 03.5" P.A. 191.00 sep 0.2 mag 9.06,9.60 Sp A3 dist. 226.76 pc (739.69 l.y.)

Coord 2000	20215+3035		Discov num	BU 1259		Comp	Ba,Bb		Coord arcsec 2000	20 21 19.55 +30 36 03.5
Date first	1891		Date last	1991		Obs	26
Pa first	172		Pa last	191		P.A. Now (θ)	191°
Sep first	0.5		Sep last	0.228		Sep. Now (ρ)	0.228"
Mag pri	9.06		Mag sec	9.60		delta mag (ΔM)	0.54		Spectral class	A3 (white)
Pri motion ra	+008		Sec motion ra
Pri motion dec	+002		Sec motion dec
Notes

Nature of this double is uncertain.

20215+3035 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 193857	69888	20 21 30 +30 35 25	ARY 4 AB	2015	17	287	134.9	6.78	8.54	1.76
Show		69879	20 21 20 +30 36 04	BU 1259 Ba,Bb	1991	26	191	0.2	9.06	9.60	0.54		<===
Show		69879	20 21 20 +30 36 04	BU 1259 BC	2012	9	356	10.3	8.54	13.50	4.96

Quadruple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Cygnus		SAO	69879		HIP	100369		Tycho2	2672-01711-1
Gaia DR2	1861588054747817344		HD	334154		BD	BD+30 3994		Distance	226.76
Distance ly	739.69