Zeta Pavonis
Star in the constellation Pavo
From Wikipedia, the free encyclopedia
Zeta Pavonis is an orange-hued star in the southern constellation Pavo. Its name is a Bayer designation that is Latinized from ζ Pavonis, and abbreviated Zeta Pav or ζ Pav. Its apparent magnitude is 4.01,[2] which is bright enough to be faintly visible to the naked eye. The annual parallax shift of this star is 15.15 mas as seen from Earth,[1] which provides a distance of 215 light-years (66 parsecs). It is moving closer to the Sun with a radial velocity of −16.30.[4] Based upon its motion through space, this star appears to be a member of the Hyades Supercluster.[7]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pavo |
| Right ascension | 18h 43m 02.13634s[1] |
| Declination | −71° 25′ 41.2162″[1] |
| Apparent magnitude (V) | +4.01[2] |
| Characteristics | |
| Spectral type | K0III[2] |
| U−B color index | +1.02[3] |
| B−V color index | +1.13[2] |
| Astrometry | |
| Radial velocity (Rv) | −16.30[4] km/s |
| Proper motion (μ) | RA: +1.186 mas/yr[1] Dec.: −158.496 mas/yr[1] |
| Parallax (π) | 15.1495±0.1135 mas[1] |
| Distance | 215 ± 2 ly (66.0 ± 0.5 pc) |
| Absolute magnitude (MV) | −0.12[2] |
| Details | |
| Radius | 18.47[5] R☉ |
| Luminosity | 133[5] L☉ |
| Surface gravity (log g) | 1.97±0.09[6] cgs |
| Temperature | 4,514±50[6] K |
| Metallicity [Fe/H] | −0.44±0.04[6] dex |
| Rotational velocity (v sin i) | 3.9±0.7[6] km/s |
| Other designations | |
| ζ Pav, CPD−71°2353, FK5 698, GC 25522, HD 171759, HIP 91792, HR 6982, SAO 257620, CCDM J18430-7125A, WDS J18430-7126A | |
| Database references | |
| SIMBAD | data |
This is an evolved K-type giant star with a stellar classification of K0 III,[2] which indicates it has exhausted the supply of hydrogen at its core. This star has 19 times the radius of the Sun, radiating 133 solar luminosities from its photosphere[5] at an effective temperature of 4,514 K. The metallicity of the star is subsolar.[6]
Zeta Pavonis has a companion, probably optical, of apparent magnitude 12.0 at about 55.6" separation.[8][9]