20027+3349 BKO 523AD

Coord 2000	20027+3349		Discov num	BKO 523		Comp	AD		Coord arcsec 2000	20 02 44.05 +33 48 26.9
Date first	1998		Date last	2015		Obs	7
Pa first	342		Pa last	341		P.A. Now (θ)	341°
Sep first	4.9		Sep last	5.0		Sep. Now (ρ)	5"
Mag pri	10.50		Mag sec	13.00		delta mag (ΔM)	2.5		Spectral class
Pri motion ra	+005		Sec motion ra
Pri motion dec	-005		Sec motion dec
Notes	N (See Notes)

Visually invisible, K-band or other infrared star 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			20027+3349	SEI 815	AB	1894	2015	10	358	19.4	10.91	12.60	1.69
Show			20027+3349	SEI 816	AC	1894	2015	10	113	20.6	10.50	11.00	0.50
Show			20027+3349	BKO 523	AD	1998	2015	7	341	5.0	10.50	13.00	2.50		<===

Quadruple system
4 visible stars in this system

Precise pa	340.6		Precise sep	5.024		Constellation	Cygnus		Tycho2	2678-01576-1
Gaia DR2	11751580544

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20027+3349	BKO 523	AD	2008	1	348	5.0	10.50	13.00		N	200244.06+334827.0
20027+3349	BKO 523	AD	2015	4	341	5.0	10.50	13.00		N	200244.05+334826.9

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