Gamma Pavonis
Star in the constellation Pavo
From Wikipedia, the free encyclopedia
Gamma Pavonis, Latinized from γ Pavonis, is a star in the southern circumpolar constellation of Pavo. With an apparent visual magnitude of 4.22,[2] it is a fourth-magnitude star and thereby visible to the naked eye. From parallax observations with the Gaia satellite, the distance to this star has been measured at 30.20 light-years (9.26 parsecs). It is drifting closer to the Sun with a radial velocity of −30 km/s.[1]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pavo |
| Right ascension | 21h 26m 26.60498s[1] |
| Declination | −65° 21′ 58.3131″[1] |
| Apparent magnitude (V) | 4.22[2] |
| Characteristics | |
| Evolutionary stage | main sequence[1] |
| Spectral type | F9 V Fe-1.4 CH-0.7[3] |
| U−B color index | −0.13[4] |
| B−V color index | +0.48[4] |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | −29.78±0.12[1] km/s |
| Proper motion (μ) | RA: +80.815 mas/yr[1] Dec.: +800.573 mas/yr[1] |
| Parallax (π) | 108.0102±0.1061 mas[1] |
| Distance | 30.20 ± 0.03 ly (9.258 ± 0.009 pc) |
| Absolute magnitude (MV) | 4.40[5] |
| Details | |
| Mass | 0.934±0.033[6] M☉ |
| Radius | 1.057±0.012[6] R☉ |
| Luminosity | 1.461±0.049[6] L☉ |
| Surface gravity (log g) | 4.359±0.008[6] cgs |
| Temperature | 6,168±130[6] K |
| Metallicity [Fe/H] | −0.66±0.09[6] dex |
| Rotational velocity (v sin i) | 1.0±0.6[7] km/s |
| Age | 5.9±1.2[6] Gyr |
| Other designations | |
| γ Pav, CD−65°2751, FK5 805, GJ 827, HD 203608, HIP 105858, HR 8181, SAO 254999, LHS 3674, LTT 8510 | |
| Database references | |
| SIMBAD | data |
The stellar classification of F9 V[3] puts it in the class of F-type main sequence stars that generate energy through the nuclear fusion of hydrogen at the core. It is a metal-poor star, which means it has a low abundance of elements heavier than helium. This star has about 93% of the Sun's mass, and about 106% its radius. It is a brighter star with 146% of the Sun's luminosity, which is it radiating from the outer envelope at an effective temperature of 6,168 K. Its age is estimated at 5.9 billion years.[6]
This star had rank 14 on TPF-C's top 100 target stars to search for a rocky planet in the Habitable Zone, approximately 1.2 AU, or a little beyond an Earth-like orbit.[8]