52 Cygni

**52 Cyg A / B**
Observation data Epoch J2000
52 Cygni A and B
Constellation (pronunciation)	Cygnus
Right ascension	20h 45m 39.7537s
Declination	+30° 43' 10.975"'
Apparent magnitude (V)	4.233 / 9.5
Characteristics
Spectral type	G9.5III
U-B color index	0.89
B-V color index	1.05
Variable type	None
Astrometry
Radial velocity (R_v)	-1.3 km/s
Proper motion (μ)	RA: -8.01 mas/yr Dec.: 24.04 mas/yr
Parallax (π)	15.84 ± 0.62 mas
Distance	206 ± 8 ly (63 ± 2 pc)
Absolute magnitude (M_V)	5.279
Details
Mass	? M_☉
Radius	? R_☉
Surface gravity (log g)	?
Luminosity	? L_☉
Temperature	? K
Metallicity	?
Rotation	<17 km/s
Age	? years
Visual binary orbit
Companion	52 Cygni B
Semimajor axis (a)	6.1"
Other designations
GCRV 13012, IDS 20415+3021, TD1 27245, ADS 14259 A, IRC +30450, TYC 2687-2651-1, BD+30° 4167, GSC 02687-02651, JP11 3272, UBV M 25148, CCDM J20457+3043A, HD 197912, PLX 4952, UBV 17981, CSI+30° 4167 1, HIC 102453, ROT 3030, 1E 2043.5+3032, HIP 102453, SAO 70467, GC 28942, HR 7942, BD+30° 4167B, ADS 14259 B, CSI+30° 4167 2, STF 2726B, CCDM J20457+3043B.
Database references
SIMBAD	data
Database references
SIMBAD	data