20238+3830 BKO 153BF

Coord 2000	20238+3830		Discov num	BKO 153		Comp	BF		Coord arcsec 2000	20 23 48.89 +38 30 03.8
Date first	1998		Date last	2015		Obs	9
Pa first	323		Pa last	323		P.A. Now (θ)	323°
Sep first	16.0		Sep last	16.0		Sep. Now (ρ)	16"
Mag pri	12.12		Mag sec	13.70		delta mag (ΔM)	1.58		Spectral class
Pri motion ra	-004		Sec motion ra	-008
Pri motion dec	-003		Sec motion dec	-001
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.555 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	V2031 Cyg	69957	20238+3830	BUP 209	AB	1879	2015	13	320	38.5	8.65	12.12	3.47
Show		69957	20238+3830	BUP 209	AC	1879	2015	23	296	65.8	8.65	9.34	0.69
Show		69957	20238+3830	BKO 153	AD	1895	2015	14	119	54.6	8.65	11.50	2.85
Show		69957	20238+3830	BKO 153	BE	1998	2015	9	264	14.7	12.12	14.08	1.96
Show		69957	20238+3830	BKO 153	BF	1998	2015	9	323	16.0	12.12	13.70	1.58		<===
Show		69957	20238+3830	BKO 153	BG	1998	2015	9	31	14.6	12.12	14.40	2.28
Show		69957	20238+3830	FYM 128	BH	1998	2015	8	223	10.9	12.12	15.56	3.44
Show		69957	20238+3830	FYM 128	BI	1998	2015	8	57	32.2	12.12	14.41	2.29

Ninefold system
9 visible stars in this system

Precise pa	322.8		Precise sep	16.04		Var name	V2031 Cyg		Spectr	F0III
Constellation	Cygnus		SAO	69957		HIP	100586		Tycho2	3152-01451-1
Gaia DR2	53535982464		HD	229221		BD	BD+38 4063		Distance	380.23
Distance ly	1240.31

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20238+3830	BKO 153	BF	2003	2	323	16.0	11.50	13.20		D	202348.89+383003.8
20238+3830	BKO 153	BF	2012	4	323	16.0	12.12	13.70		N	202348.89+383003.8
20238+3830	BKO 153	BF	2015	5	323	16.0	12.12	13.70		N	202348.89+383003.8

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