Gamma Pavonis

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 mas[1]
Distance30.21 ± 0.05 ly
(9.26 ± 0.02 pc)
Absolute magnitude (MV)4.40[5]
Details
Mass1.21±0.12[6] M☉
Radius1.15±0.04[6] R☉
Luminosity1.52±0.05[6] L☉
Surface gravity (log g)4.3[2] cgs
Temperature6,112[2] K
Metallicity [Fe/H]–0.80[2] dex
Rotational velocity (v sin i)1.0±0.6[6] km/s
Age1.0[5] or 7.25[7] 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
SIMBADdata

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 Hipparcos satellite, the distance to this star has been estimated at 30.21 light-years (9.26 parsecs).[1] It is drifting closer to the Sun with a radial velocity of −30 km/s.[5]

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 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.

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  7. ^ a b Cite error: The named reference mosser2008 was invoked but never defined (see the help page).