- Omega² Cygni
-
ω2 Cyg A Observation data
Epoch J2000 Equinox J2000Constellation 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/yrParallax (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
Bayer Flamsteed - 1 (κ)
- 2
- 4
- 6 (β, Albireo)
- 7 (ι¹)
- 8
- 9
- 10 (ι²)
- 11
- 12 (φ)
- 13 (θ)
- 14
- 15
- 16 (c)
- 17
- 18 (δ, Rukh)
- 19
- 20 (d)
- 21 (η)
- 22
- 23
- 24 (ψ)
- 25
- 26 (e)
- 27 (b¹)
- 28 (b²)
- 29 (b³)
- 30
- 31 (ο¹)
- 32 (ο²)
- 33
- 34 (P)
- 35
- 36
- 37 (γ, Sadr)
- 39
- 40
- 41
- 42
- 43
- 44
- 45 (ω¹)
- 46 (ω²)
- 47
- 48
- 49
- 50 (α, Deneb)
- 51
- 52
- 53 (ε, Gienah)
- 54 (λ)
- 55
- 56
- 57
- 58 (ν)
- 59 (f¹)
- 60
- 61
- 62 (ξ)
- 63 (f²)
- 64 (ζ)
- 65 (τ)
- 66 (υ)
- 67 (σ)
- 68 (A)
- 69
- 70
- 71 (g)
- 72
- 73 (ρ)
- 74
- 75
- 76
- 77
- 78 (μ)
- 79
- 80 (π¹, Azelfafage)
- 81 (π², Pennae Caudalis)
Nearby Other Categories:- Bayer objects
- Cygnus constellation
- Stars with proper names
- Multiple star stubs
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