Gamma Volantis
K-type giant star in the constellation Volans
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Gamma Volantis, Latinized from γ Volantis, is a wide binary star[4] system in the southern constellation of Volans. Based upon parallax measurements, it is approximately 133 light years from Earth. At a combined apparent magnitude of +3.61, it is bright enough to be seen with the naked eye and can be found around 9° to the east-southeast of the Large Magellanic Cloud.[12]
 | |
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Volans |
| γ1 Vol | |
| Right ascension | 07h 08m 42.3703s[1] |
| Declination | −70° 29′ 49.527″[1] |
| Apparent magnitude (V) | 5.68[2] |
| γ2 Vol | |
| Right ascension | 07h 08m 44.8657s[3] |
| Declination | −70° 29′ 56.149″[3] |
| Apparent magnitude (V) | 3.78[2] |
| Characteristics | |
| Spectral type | F2V + K0III[4] |
| Astrometry | |
| γ1 Vol | |
| Radial velocity (Rv) | −3[5] km/s |
| Proper motion (μ) | RA: 11.069(437)[1] mas/yr Dec.: 107.302(577)[1] mas/yr |
| Parallax (π) | 22.7501±0.4619 mas[1] |
| Distance | 143 ± 3 ly (44.0 ± 0.9 pc) |
| Absolute magnitude (MV) | 2.51[6] |
| γ2 Vol | |
| Radial velocity (Rv) | +2.8[5] km/s |
| Proper motion (μ) | RA: 23.620(154)[3] mas/yr Dec.: 108.653(170)[3] mas/yr |
| Parallax (π) | 24.4775±0.1130 mas[3] |
| Distance | 133.2 ± 0.6 ly (40.9 ± 0.2 pc) |
| Details | |
| γ1 Vol | |
| Mass | 1.69[7] M☉ |
| Surface gravity (log g) | 2.71[7] cgs |
| Temperature | 6,541[6] K |
| Metallicity [Fe/H] | +0.12[8] dex |
| Rotational velocity (v sin i) | 4.4±0.2[6] km/s |
| Age | 1.4[8] Gyr |
| γ2 Vol | |
| Mass | 2.15±0.07[9] M☉ |
| Radius | 10.20±0.23[9] R☉ |
| Luminosity | 53.7±1.6[9] L☉ |
| Surface gravity (log g) | 2.74±0.095[9] cgs |
| Temperature | 4,892±41[9] K |
| Metallicity [Fe/H] | 0.054±0.03[9] dex |
| Other designations | |
| γ Vol, CPD−70°600, FK5 1189[10][11] | |
| γ1 Vol: HD 55864, HIP 34473, HR 2735, SAO 256373[10] | |
| γ2 Vol: HD 55865, HIP 34481, HR 2736, SAO 256374[11] | |
| Database references | |
| SIMBAD | γ1 Vol |
| γ2 Vol | |
The brighter component, designated γ2 Volantis, is an orange K-type giant star with a stellar classification of K0III and an apparent magnitude of +3.78, making this the brightest star in the constellation. Its companion, γ1 Volantis, is an F-type main-sequence star of classification F2V and an apparent magnitude of +5.68. As of 2002, the pair were at an angular separation of 14.1″ along a position angle of 296°. Their separation has decreased from 15.7″ in 1826.[13] The secondary is a source of X-ray emission with a luminosity of 8.3×1028 erg s−1.[14]