20072+3531 BKO  90AC

Coord 2000	20072+3531		Discov num	BKO  90		Comp	AC		Coord arcsec 2000	20 07 12.14 +35 31 02.9
Date first	1998		Date last	2015		Obs	8
Pa first	53		Pa last	52		P.A. Now (θ)	52°
Sep first	13.8		Sep last	13.8		Sep. Now (ρ)	13.8"
Mag pri	11.39		Mag sec	15.10		delta mag (ΔM)	3.71		Spectral class	B5 (blue-white)
Pri motion ra	-004		Sec motion ra
Pri motion dec	-006		Sec motion dec
Notes

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		69444	20072+3531	SEI 890	AB	1896	2015	10	94	15.3	11.39	12.50	1.11
Show		69444	20072+3531	BKO 90	AC	1998	2015	8	52	13.8	11.39	15.10	3.71		<===

Triple system
3 visible stars in this system

Precise pa	52.2		Precise sep	13.804		Constellation	Cygnus		SAO	69444
Tycho2	2679-00745-1		Gaia DR2	36539959296

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20072+3531	BKO 90	AC	2002	2	52	13.5	11.39	15.10		D	200712.14+353102.9
20072+3531	BKO 90	AC	2015	4	52	13.8	11.39	15.10	B5		200712.14+353102.9

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