29 Vulpeculae is a suspected astrometric binary star system in the northern constellation Vulpecula. It is visible to the naked eye as a faint, white-hued point of light with an apparent visual magnitude of 4.82.[2] The system lies approximately 209 light years away from the Sun based on parallax,[1] and is a member of the IC 2391 supercluster.[8] It is moving closer to the Earth with a heliocentric radial velocity of −17 km/s.[4]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Vulpecula |
Right ascension | 20h 38m 31.32904s[1] |
Declination | 21° 12′ 04.3763″[1] |
Apparent magnitude (V) | 4.82[2] |
Characteristics | |
Spectral type | A0V[3] |
U−B color index | −0.07[2] |
B−V color index | −0.02[2] |
Astrometry | |
Radial velocity (Rv) | −17.10[4] km/s |
Proper motion (μ) | RA: +78.741[1] mas/yr Dec.: −4.572[1] mas/yr |
Parallax (π) | 15.6257 ± 0.3374 mas[1] |
Distance | 209 ± 5 ly (64 ± 1 pc) |
Absolute magnitude (MV) | 0.56[5] |
Details | |
Mass | 2.67[3] M☉ |
Luminosity | 71[3] L☉ |
Surface gravity (log g) | 4.20[6] cgs |
Temperature | 10,507[6] K |
Metallicity [Fe/H] | −0.15[5] dex |
Rotational velocity (v sin i) | 52[3] km/s |
Age | 254[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
Radial velocity measurements from High Accuracy Radial Velocity Planet Searcher with an amplitude of 4 km/s indicate that it is a spectroscopic binary of unknown period.[9] The visible component is an A-type main-sequence star with a stellar classification of A0V,[3] and has some slight abundance anomalies that resemble a weak Am star.[10] It is catalogued as a shell star, showing spectral features of a cooler circumstellar jacket of gas,[11] and may be a proto-shell star.[10] The star is an estimated 254[6] million years old with a relatively low projected rotational velocity of 52 km/s.[3] It has 2.67[3] times the mass of the Sun and is radiating 71[3] times the Sun's luminosity from its photosphere at an effective temperature of 10,507 K.[6]