Gamma Sculptoris
Solitary orange-hued star in the constellation Sculptor
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Gamma Sculptoris, Latinized from γ Sculptoris, is a single,[9] orange-hued star in the constellation Sculptor. Based upon an annual parallax shift of 17.90 mas as seen from Earth,[1] this star is located about 182 light years from the Sun. It is bright enough to be visible to the naked eye with an apparent visual magnitude of 4.41.[2] It is moving away from the Sun with a radial velocity of +15.6 km/s.[6]
 | |
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Sculptor |
| Right ascension | 23h 18m 49.44076s[1] |
| Declination | −32° 31′ 55.2890″[1] |
| Apparent magnitude (V) | 4.41[2] |
| Characteristics | |
| Evolutionary stage | red clump[3] |
| Spectral type | K1 III[4] |
| U−B color index | +1.06[5] |
| B−V color index | +1.13[5] |
| Astrometry | |
| Radial velocity (Rv) | +15.60[6] km/s |
| Proper motion (μ) | RA: +20.13[1] mas/yr Dec.: −77.72[1] mas/yr |
| Parallax (π) | 17.90±0.19 mas[1] |
| Distance | 182 ± 2 ly (55.9 ± 0.6 pc) |
| Absolute magnitude (MV) | 0.67[2] |
| Details[3] | |
| Mass | 1.15–1.31 M☉ |
| Radius | 11.61±0.24 R☉ |
| Luminosity | 53.09+2.37 −2.27 L☉ |
| Surface gravity (log g) | 2.29±0.17 cgs |
| Temperature | 4,580±30 K |
| Metallicity [Fe/H] | −0.10±0.04 dex |
| Rotational velocity (v sin i) | 1.7[7] km/s |
| Age | 3.98±0.37 – 5.83±0.62 Gyr |
| Other designations | |
| γ Scl, CD−33°16476, FK5 879, GC 32450, GJ 9821, HD 219784, HIP 115102, HR 8863, SAO 214444, GSC 07510-01089[8] | |
| Database references | |
| SIMBAD | data |
This is an evolved K-type giant star with a stellar classification of K1 III.[4] At the age of four to six billion years it is a red clump star on the horizontal branch, which means it is generating energy through helium fusion at its core. The star has 1.15 to 1.31 times the mass of the Sun and it has expanded to 11.6 times the Sun's radius. It is radiating 53 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,580 K.[3]