Cyg OB2 -8A

Cyg OB2 -8A
Cyg OB2-8A

Cyg OB2-8A
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 20h 33m 15.0789s
Declination +41° 18' 50.494"'
Apparent magnitude (V) 8.99
Characteristics
Spectral type O6Ib/O5III
U−B color index ?
B−V color index ?
Variable type Eclipsing binary
Astrometry
Radial velocity (Rv) -27.7 km/s
Proper motion (μ) RA: -1.16 mas/yr
Dec.: -4.05 mas/yr
Parallax (π) -0.94 ± 1.91 mas
Distance approx. -3000 ly
(approx. -1000 pc)
Absolute magnitude (MV) 10.08
Details
Mass ? M☉
Radius 28 R☉
Surface gravity (log g) ?
Luminosity 2.750.000 L☉
Temperature 48.000 K
Metallicity ?
Rotation ?
Age 6.43 million years
Other designations
VI CYG 8A, 1E 203127+4108.5, Hilt 996, TYC 3161-1325-1, ADS 14000 A, 2E 4382, HIP 101425, UBV 17839, AG+41° 1925, 2E 2031.4+4108, IDS 20297+4058, ALS 11423, EM* CDS 1173, LS III +41 37, Ass Cyg OB 2-8 A, 1ES 2031+41.1, 2MASS J20331508+4118504, BD+40° 4227, GCRV 20036, PPM 60129, CCDM J20332+4119A, 1RXS J203315.8+411848, CGO 605, GOS G080.22+00.79 01, SAO 49781, CSI+40 4227 1, GSC 03161-01325, Schulte 8A, CXOCyg J203315.07+411850.3, HIC 101425, Schulte 8.
Database references
SIMBAD data

Cyg OB2-8A or TYC 3161-01325-1 is a eclipsing binary in Cyg OB2 Association.

HIC 101425 includes the components CCDM J20332+4119A, CCDM J20332+4119B, CCDM J20332+4119D and CCDM J20332+4119E.

References

External links

Coordinates: Sky map 20h 33m 15.0789s, +41° 18′ 50.494″



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