20311+4203 CAN 25 AB

Coord 2000	20311+4203		Discov num	CAN  25		Comp	AB		Coord arcsec 2000	20 31 08.38 +42 02 42.3
Date first	2008		Date last	2008		Obs	2
Pa first	221		Pa last	220.6		P.A. Now (θ)	220.6°
Sep first	4.2		Sep last	4.22		Sep. Now (ρ)	4.22"
Mag pri	7.00		Mag sec	15.40		delta mag (ΔM)	8.4		Spectral class	O9.7II (blue)
Pri motion ra	-003		Sec motion ra
Pri motion dec	-001		Sec motion dec
Notes	V K (Proper motion indicates physical, 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 This double is physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 31 08 +42 02 42	CAN 2 Aa,Ab	2008	3	258	0.3	11.80	15.00	3.20
Show			20 31 08 +42 02 42	CAN 25 AB	2008	2	221	4.2	7.00	15.40	8.40		<===

Triple system
2 estimated visually detectable stars in this system

Constellation

Cygnus