Gamma Pavonis
 Location of γ Pavonis (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Pavo |
| Right ascension | 21h 26m 26.60484s[1] |
| Declination | −65° 21′ 58.3145″[1] |
| Apparent magnitude (V) | 4.22[2] |
| Characteristics | |
| 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) | −29.9[5] km/s |
| Proper motion (μ) | RA: +80.56[1] mas/yr Dec.: +800.60[1] mas/yr |
| Parallax (π) | 107.97 ± 0.19[1] mas |
| Distance | 30.21 ± 0.05 ly (9.26 ± 0.02 pc) |
| Details | |
| Mass | 1.21 ± 0.12[6] M☉ |
| Radius | 1.15 ± 0.04[6] R☉ |
| Luminosity | 1.52 ± 0.05[6] L☉ |
| Surface gravity (log g) | 4.3[2] cgs |
| Temperature | 6,112[2] K |
| Metallicity [Fe/H] | –0.80[2] dex |
| Rotational velocity (v sin i) | 1.0 ± 0.6[6] km/s |
| Age | 1.0[5] or 7.25[7] Gyr |
| Other designations | |
Gamma Pavonis (γ Pav, 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 Hipparcos satellite, the distance to this star has been estimated at 30.21 light-years (9.26 parsecs).[1]
Compared to the Sun, this star has a 21% greater mass and a 15% larger radius. It is a brighter star with 152% of the Sun's luminosity,[6] which is it radiating from the outer envelope at an effective temperature of 6,112 K.[2] 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. Age estimates range from a low of a billion[5] years up to 7.25 billion years.[7] Gamma Pavonis is orbiting through the Milky Way at an unusually high peculiar velocity relative to nearby stars.[citation needed]
This star has rank 14 on TPC-F'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.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 6.2 6.3 6.4 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
External links
- Gamma Pavonis SolStation entry.
- ARICNS
