20305+4113 CAN 27 AC

Coord 2000	20305+4113		Discov num	CAN  27		Comp	AC		Coord arcsec 2000	20 30 27.30 +41 13 25.3
Date first	2008		Date last	2014		Obs	3
Pa first	286		Pa last	286.7		P.A. Now (θ)	286.7°
Sep first	8.3		Sep last	8.144		Sep. Now (ρ)	8.144"
Mag pri	6.40		Mag sec	12.90		delta mag (ΔM)	6.5		Spectral class	O7 (blue)
Pri motion ra			Sec motion ra
Pri motion dec			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 30 27 +41 13 25	CAN 27 AB	2008	1	107	4.9	6.40	13.40	7.00
Show			20 30 27 +41 13 25	CAN 27 AC	2014	3	287	8.1	6.40	12.90	6.50		<===
Show			20 30 27 +41 13 25	CAN 27 AD	2008	1	108	9.8	6.40	13.70	7.30
Show			20 30 27 +41 13 25	CAN 27 AE	2008	1	14	10.6	6.40	14.70	8.30

Quintuple system
5 estimated visually detectable stars in this system

Constellation

Cygnus