20238+3830 BUP 209AC

Coord 2000	20238+3830		Discov num	BUP 209		Comp	AC		Coord arcsec 2000	20 23 51.01 +38 29 34.3
Date first	1879		Date last	2015		Obs	23
Pa first	295		Pa last	296		P.A. Now (θ)	296°
Sep first	66.3		Sep last	65.8		Sep. Now (ρ)	65.8"
Mag pri	8.65		Mag sec	9.34		delta mag (ΔM)	0.69		Spectral class	F0III (yellow-white)
Pri motion ra	-012		Sec motion ra	-004
Pri motion dec	-010		Sec motion dec	-006
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.573 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	296.1		Precise sep	65.775		Var name	V2031 Cyg		Constellation	Cygnus
SAO	69957		HIP	100586		Tycho2	3152-00040-1		Gaia DR2	01923197312
HD	194378		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	BUP 209	AC	2003	16	296	66.0	8.65	9.34		N D	202351.01+382934.3
20238+3830	BUP 209	AC	2012	18	296	65.8	8.65	9.34		N D	202351.01+382934.3
20238+3830	BUP 209	AC	2015	19	296	65.8	8.65	9.34	F0III	N	202351.01+382934.3

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