19555+4140 KOI1689AB

Coord 2000	19555+4140		Discov num	KOI1689		Comp	AB		Coord arcsec 2000	19 55 32.15 +41 39 43.4
Date first	2010		Date last	2015		Obs	2
Pa first	171		Pa last	171		P.A. Now (θ)	171°
Sep first	2.6		Sep last	2.8		Sep. Now (ρ)	2.8"
Mag pri	13.40		Mag sec	17.50		delta mag (ΔM)	4.1		Spectral class
Pri motion ra	+007		Sec motion ra
Pri motion dec	+010		Sec motion dec
Notes	K (K-band or other infrared magnitudes)

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		48981	19555+4140	KOI1689	AB	2010	2015	2	171	2.8	13.40	17.50	4.10		<===
Show		48981	19555+4140	KOI1689	AC	2010	2010	1	55	3.8	13.40	17.30	3.90

Triple system
3 visible stars in this system

Precise pa	171.3		Precise sep	2.768		Constellation	Cygnus		SAO	48981
Gaia DR2	87766722944

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19555+4140	KOI1689	AB	2010	1	171	2.6	13.40	17.50		K	195532.15+413943.4
19555+4140	KOI1689	AB	2015	2	171	2.8	13.40	17.50		K	195532.15+413943.4

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