Omega2 Cygni
- For other star systems with this Bayer designation, see ω Cygni.
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cygnus |
Right ascension | 20h 31m 18.8163s |
Declination | +49° 13' 13.07"' |
Apparent magnitude (V) | 5.468 |
Characteristics | |
Spectral type | M2III |
U−B color index | ? |
B−V color index | ? |
Variable type | None |
Astrometry | |
Radial velocity (Rv) | -64.0 km/s |
Proper motion (μ) | RA: 8.79 mas/yr Dec.: -31.28 mas/yr |
Parallax (π) | 8.07 ± 0.49 mas |
Distance | 400 ± 20 ly (124 ± 8 pc) |
Absolute magnitude (MV) | 7.036 |
Details | |
Mass | ? M☉ |
Radius | ? R☉ |
Luminosity | ? L☉ |
Temperature | ? K |
Metallicity | ? |
Rotation | ? |
Age | ? years |
Orbit | |
Companion | ω2 Cyg B |
Other designations | |
Database references | |
SIMBAD | data |
Omega2 Cygni (ω2 Cyg, ω2 Cygni) is a star in the constellation Cygnus. It has the traditional name Ruchba.
It is a double star about 500 light years from Earth, consisting of a magnitude 5.44 star of spectral class M2 and a 6.6 magnitude star of spectral class A0. The stars are 256" apart and can be seen in binoculars. Because of the color contrast (red main star and blue companion), Ruchba is a beautiful object for amateur astronomers.
References
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