Delta Reticuli
Star in the constellation Reticulum From Wikipedia, the free encyclopedia
Delta Reticuli (Delta Ret, δ Reticuli, δ Ret) is a star in the southern constellation of Reticulum. It is visible to the naked eye, having an apparent visual magnitude of 4.60.[2] The distance to this star, as estimated from its annual parallax shift of 6.20 mas,[1] is roughly 530 light-years from the Sun.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Reticulum |
| Right ascension | 03h 58m 44.74945s[1] |
| Declination | −61° 24′ 00.6673″[1] |
| Apparent magnitude (V) | 4.60[2] |
| Characteristics | |
| Evolutionary stage | asymptotic giant branch[3] |
| Spectral type | M2 III[4] |
| U−B color index | +2.02[2] |
| B−V color index | +1.61[2] |
| Variable type | Suspected[5] |
| Astrometry | |
| Radial velocity (Rv) | −1.4±2.8[6] km/s |
| Proper motion (μ) | RA: +9.80[1] mas/yr Dec.: −14.30[1] mas/yr |
| Parallax (π) | 6.20 ± 0.25 mas[1] |
| Distance | 530 ± 20 ly (161 ± 7 pc) |
| Absolute magnitude (MV) | −1.47[7] |
| Details | |
| Radius | 56[8] R☉ |
| Luminosity | 1,100[9] L☉ |
| Temperature | 3,891[9] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an evolved red giant star on the asymptotic giant branch,[3] having a stellar classification of M2 III.[4] It has expanded to around 56[8] times the radius of the Sun and radiates 1,100 times the solar luminosity from its cool outer atmosphere at an effective temperature of 3,891 K.[9]
Delta Reticuli is moving through the Milky Way at a speed of 13.3 km/s relative to the Sun. Its projected galactic orbit carries it between 22,700 and 30,400 light-years from the center of the galaxy.[11]
References
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