Global InformationGamma Horologii information
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Horologium |
| Right ascension | 02h 45m 27.47800s[1] |
| Declination | −63° 42′ 16.3925″[1] |
| Apparent magnitude (V) | +5.743[2] |
| Characteristics | |
| Spectral type | G8 III/IV[3] |
| B−V color index | +0.929[2] |
| Astrometry | |
| Radial velocity (Rv) | −18.79±0.16[1] km/s |
| Proper motion (μ) | RA: +18.913[1] mas/yr Dec.: −8.742[1] mas/yr |
| Parallax (π) | 17.7941 ± 0.0592 mas[1] |
| Distance | 183.3 ± 0.6 ly (56.2 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.99[4] |
| Details | |
| Radius | 5.50+0.11 −0.08[1] R☉ |
| Luminosity | 16.9±0.1[1] L☉ |
| Surface gravity (log g) | 3.18±0.05[5] cgs |
| Temperature | 4,961±24[5] K |
| Metallicity [Fe/H] | −0.26±0.02[5] dex |
| Other designations | |
γ Hor, CPD−64° 196, HD 17504, HIP 12871, HR 833, SAO 248642, WDS J02455-6342A[6] | |
| Database references | |
| SIMBAD | data |
γ Horologii, Latinised as Gamma Horologii, is a solitary[7] star in the southern constellation of Horologium. It is just bright enough to be visible to the naked eye as a dim, yellow-hued point of light with an apparent visual magnitude of +5.74.[2] This object is located at a distance of 183 light years from the Sun, but is drifting closer with a radial velocity of −19 km/s.[1]
The stellar classification of this object is G8 III/IV,[3] matching a G-type star with a luminosity class intermediate between a subgiant and giant star. This suggests it has exhausted the supply of hydrogen at its core and is evolving off the main sequence. It has 5.5[1] times the radius of the Sun and is radiating 17[1] times the Sun's luminosity from its swelling photosphere at an effective temperature of 4,961 K.[5] The metallicity is sub-solar,[5] indicating a lower abundance of elements more massive than helium, as compared to the Sun.
- ^ a b c d e f g h i j k Cite error: The named reference
GaiaDR2was invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
Hog2000was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
houk1979was invoked but never defined (see the help page). - ^ Cite error: The named reference
Anderson2012was invoked but never defined (see the help page). - ^ a b c d e Cite error: The named reference
Alves2015was invoked but never defined (see the help page). - ^ Cite error: The named reference
SIMBADwas invoked but never defined (see the help page). - ^ Cite error: The named reference
Eggleton2008was invoked but never defined (see the help page).