16 Cygni
Multiple star in the constellation Cygnus / From Wikipedia, the free encyclopedia
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16 Cygni or 16 Cyg is a triple star system approximately 69 light-years away from Earth in the constellation of Cygnus. It consists of two Sun-like yellow dwarf stars, 16 Cygni A and 16 Cygni B, together with a red dwarf, 16 Cygni C. In 1996 an extrasolar planet was discovered in an eccentric orbit around 16 Cygni B.
Quick Facts Observation data Epoch J2000.0 Equinox J2000.0, Apparent magnitude (V) ...
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Cygnus |
16 Cygni A | |
Right ascension | 19h 41m 48.9535s[1] |
Declination | +50° 31′ 30.220″[1] |
Apparent magnitude (V) | 5.96 |
16 Cygni B | |
Right ascension | 19h 41m 51.9727s[2] |
Declination | +50° 31′ 03.089″[2] |
Apparent magnitude (V) | 6.20 |
Characteristics | |
Spectral type | G1.5Vb / G2.5Vb / M?V |
U−B color index | 0.19 / 0.20 |
B−V color index | 0.64 / 0.66 |
Variable type | None |
Astrometry | |
16 Cyg A | |
Radial velocity (Rv) | −27.31(13)[1] km/s |
Proper motion (μ) | RA: −148.034(28) mas/yr[1] Dec.: −159.030(28) mas/yr[1] |
Parallax (π) | 47.3239 ± 0.0197 mas[1] |
Distance | 68.92 ± 0.03 ly (21.131 ± 0.009 pc) |
Absolute magnitude (MV) | 4.29 |
16 Cyg B | |
Radial velocity (Rv) | −27.87(12)[2] km/s |
Proper motion (μ) | RA: −134.482(18) mas/yr[2] Dec.: −162.698(27) mas/yr[2] |
Parallax (π) | 47.3302 ± 0.0171 mas[2] |
Distance | 68.91 ± 0.02 ly (21.128 ± 0.008 pc) |
Absolute magnitude (MV) | 4.53 |
Details | |
16 Cyg A | |
Mass | 1.08±0.02[3] M☉ |
Radius | 1.229±0.008[3] R☉ |
Luminosity | 1.55±0.07[3] L☉ |
Surface gravity (log g) | 4.292±0.003[3] cgs |
Temperature | 5,830 ± 11[4] K |
Metallicity [Fe/H] | 0.101 ± 0.008[4] dex |
Rotation | 23.8+1.5 −1.8 d[5] |
Rotational velocity (v sin i) | 2.23 ± 0.07[5] km/s |
Age | 7.07±0.26[3] Gyr |
16 Cyg B | |
Mass | 1.04±0.02[3] M☉ |
Radius | 1.116±0.006[3] R☉ |
Luminosity | 1.25±0.05[3] L☉ |
Surface gravity (log g) | 4.359±0.002[3] cgs |
Temperature | 5,751 ± 11[4] K |
Metallicity [Fe/H] | 0.054 ± 0.008[4] dex |
Rotation | 23.2+11.5 −3.2 d[5] |
Rotational velocity (v sin i) | 1.35 ± 0.08[5] km/s |
Age | 6.74±0.24[3] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
A data2 | |
B data3 |
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