20316+4059 CAN 13 AD

Coord 2000	20316+4059		Discov num	CAN  13		Comp	AD		Coord arcsec 2000	20 31 36.91 +40 59 09.3
Date first	2008		Date last	2008		Obs	1
Pa first	351		Pa last	350.5		P.A. Now (θ)	350.5°
Sep first	13.9		Sep last	13.86		Sep. Now (ρ)	13.86"
Mag pri	6.80		Mag sec	13.00		delta mag (ΔM)	6.2		Spectral class	O7I (blue)
Pri motion ra			Sec motion ra
Pri motion dec			Sec motion dec
Notes	K (K-band or other infrared magnitudes)

Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 31 37 +40 59 09	CAN 13 AB	2008	1	80	5.2	6.80	15.60	8.80
Show			20 31 37 +40 59 09	CAN 13 AC	2014	4	261	12.6	6.80	14.20	7.40
Show			20 31 37 +40 59 09	CAN 13 AD	2008	1	351	13.9	6.80	13.00	6.20		<===

Quadruple system
4 estimated visually detectable stars in this system

Constellation

Cygnus