20189+3817 A 1425 AB

20^h 18^m 51.71^s +38° 16' 46.5" P.A. 266.00 sep 0.2 mag 7.95,8.25 Sp O9III dist. 1086.96 pc (3545.66 l.y.)

Coord 2000	20189+3817		Discov num	A 1425		Comp	AB		Coord arcsec 2000	20 18 51.71 +38 16 46.5
Date first	1906		Date last	2011		Obs	27
Pa first	297		Pa last	266.2		P.A. Now (θ)	266.2°
Sep first	0.2		Sep last	0.182		Sep. Now (ρ)	0.182"
Mag pri	7.95		Mag sec	8.25		delta mag (ΔM)	0.3		Spectral class	O9III (blue)
Pri motion ra	-010		Sec motion ra
Pri motion dec	-013		Sec motion dec
Notes	N (See Notes)

Nature of this double is uncertain.

20189+3817 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		69815	20 18 52 +38 16 46	A 1425 AB	2011	27	266	0.2	7.95	8.25	0.30		<===
Show		69815	20 18 52 +38 16 46	A 1425 AB,C	2015	7	310	9.1	6.65	13.20	6.55

Triple system
4 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Cygnus		SAO	69815		HIP	100146		Tycho2	3151-03449-1
Gaia DR2	2061252769282480512		HD	193443		BD	BD+37 3879		Distance	1086.96
Distance ly	3545.66