Iota Reticuli
Star in the constellation Reticulum
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ι Reticuli, Latinized as Iota Reticuli, is a solitary,[8] orange-hued star in the southern constellation of Reticulum. It is faintly visible to the naked eye, having a combined apparent visual magnitude of +4.97.[2] Based upon an annual parallax shift of 10.22 mas as seen from Earth,[1] it is located around 319 light years from the Sun. At present it is receding from the Sun with a radial velocity of +61 km/s,[4] having come closest to the Sun 883,000 years ago at a distance of 212 light years.[9] Iota Reticuli is moving through the Galaxy at a speed of 80.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 12,300 and 25,100 light years from the center of the Galaxy.[9]
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Reticulum |
| Right ascension | 04h 01m 18.15162s[1] |
| Declination | −61° 04′ 43.7559″[1] |
| Apparent magnitude (V) | +4.97[2] |
| Characteristics | |
| Spectral type | K4 III[3] |
| U−B color index | +1.70[2] |
| B−V color index | +1.42[2] |
| Astrometry | |
| Radial velocity (Rv) | +60.5±0.8[4] km/s |
| Proper motion (μ) | RA: +66.79[1] mas/yr Dec.: +94.80[1] mas/yr |
| Parallax (π) | 10.22±0.16 mas[1] |
| Distance | 319 ± 5 ly (98 ± 2 pc) |
| Absolute magnitude (MV) | +0.02[5] |
| Details | |
| Radius | 24.3+1.9 −4.7[6] R☉ |
| Luminosity | 179.8±5.1[6] L☉ |
| Temperature | 4290+261 −158[6] K |
| Other designations | |
| ι Ret, CPD−61°293, HD 25728, HIP 18772, HR 1266, SAO 248927[7] | |
| Database references | |
| SIMBAD | data |
This is an evolved K-type giant star with a stellar classification of K4 III.[3] Having exhausted the supply of hydrogen at its core, the star cooled and expanded off the main sequence; at present it has 24[6] times the girth of the Sun. It is radiating 180[6] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,290 K.[6]