20010+3742 WAL 125AB,E

Coord 2000	20010+3742		Discov num	WAL 125		Comp	AB,E		Coord arcsec 2000	20 00 59.61 +37 41 56.1
Date first	1944		Date last	2015		Obs	7
Pa first	30		Pa last	10		P.A. Now (θ)	10°
Sep first	40.0		Sep last	46.5		Sep. Now (ρ)	46.5"
Mag pri	8.15		Mag sec	13.52		delta mag (ΔM)	5.37		Spectral class	B5 (blue-white)
Pri motion ra	-007		Sec motion ra	+000
Pri motion dec	-009		Sec motion dec	-006
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.668 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		69258	20010+3742	BU 1289	AB	1899	2016	22	55	0.7	8.15	9.20	1.05
Show		69258	20010+3742	BU 1289	AC	1896	2018	31	90	21.5	8.15	9.70	1.55
Show		69258	20010+3742	FOX 246	AB,D	1896	2015	12	170	104.2	8.15	11.17	3.02
Show		69258	20010+3742	WAL 125	AB,E	1944	2015	7	10	46.5	8.15	13.52	5.37		<===

Quintuple system
6 visible stars in this system

Precise pa	9.8		Precise sep	46.464		Constellation	Cygnus		SAO	69258
HIP	98528		Tycho2	3150-02606-1		Gaia DR2	85726240640		HD	189901
BD	BD+37 3723		Distance	469.48		Distance ly	1531.44

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20010+3742	WAL 125	AB,E	2000	2	10	46.2	8.15	13.52		D	200059.61+374156.1
20010+3742	WAL 125	AB,E	2002	3	10	46.6	8.15	13.52		D	200059.61+374156.1
20010+3742	WAL 125	AB,E	2015	7	10	46.5	8.15	13.52	B5	N	200059.61+374156.1

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