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	221	P.A. Now (θ)	221°
Sep first	4.2	Sep last	4.2	Sep. Now (ρ)	4.2"
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 This double is physical.

20311+4203 SYSTEM COMPONENTS

Show

name

SAO

coord_2000

discov#

comp

first

last

obs

sep

mag1

mag2

d_mag

orb

current

Show

20311+4203

CAN 2

Aa,Ab

2006

2008

258

0.3

11.80

15.00

3.20

Show

20311+4203

CAN 25

2008

221

4.2

7.00

15.40

8.40

<===

Triple system
2 visible stars in this system

OTHER CATALOGS AND DESIGNATIONS

Precise pa

220.6

Precise sep

4.22

Constellation

Cygnus

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20311+4203	CAN 25	AB	2008	2	221	4.2	7.00	15.40	O9.7II	V K	203108.38+420242.3

If you need more information about this double, apply for a data request form to the WDS.