Global InformationGamma Reticuli information
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| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Reticulum |
| Right ascension | 04h 00m 53.80860s[1] |
| Declination | −62° 09′ 33.4250″[1] |
| Apparent magnitude (V) | 4.5[2] |
| Characteristics | |
| Evolutionary stage | asymptotic giant branch[3] |
| Spectral type | M4 III[4] |
| U−B color index | +1.81[2] |
| B−V color index | +1.66[2] |
| Variable type | SR[5] |
| Astrometry | |
| Radial velocity (Rv) | −7.0±2.7[6] km/s |
| Proper motion (μ) | RA: +3.03[1] mas/yr Dec.: +34.67[1] mas/yr |
| Parallax (π) | 6.95 ± 0.11 mas[1] |
| Distance | 469 ± 7 ly (144 ± 2 pc) |
| Absolute magnitude (MV) | −1.31[7] |
| Details | |
| Mass | 1.5−2[5] M☉ |
| Radius | 115[5] R☉ |
| Luminosity | 1,846[8] L☉ |
| Surface gravity (log g) | 0.8[5] cgs |
| Temperature | 3,599[8] K |
| Metallicity [Fe/H] | 0.0[5] dex |
| Other designations | |
γ Ret, CD−62° 149, HD 25705, HIP 18744, HR 1264, SAO 248925.[9] | |
| Database references | |
| SIMBAD | data |
Gamma Reticuli (Gamma Ret, γ Reticuli, γ Ret) is a solitary[10] star in the southern constellation of Reticulum. With an apparent visual magnitude of 4.5,[2] it can be faintly seen with the naked eye. Based upon an annual parallax shift of 6.95 mas,[1] it is located roughly 469 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.08 due to interstellar dust.[5]
This is an evolved red giant star, currently on the asymptotic giant branch,[3] with a stellar classification of M4 III.[4] It is a semiregular variable with a period of 25 days.[5] Gamma Reticuli has 1.5−2 times the mass of the Sun, 115 times the Sun's radius,[5] and radiates 1,846 times the solar luminosity from its outer atmosphere at an effective temperature of 3,450 K.[8]
Gamma Reticuli is moving through the Galaxy at a speed of 24.8 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,100 and 39,200 light years from the center of the Galaxy.[12]
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