Eta Circini
Eta Circini, Latinized from η Circini, is the Bayer designation for a solitary star located in the southern constellation of Circinus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.17. The distance to this star, as determined from an annual parallax shift of 11.82 mas, is around 276 light years.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Circinus |
| Right ascension | 15h 04m 48.18600s |
| Declination | −64° 01′ 52.8611″ |
| Apparent magnitude (V) | 5.17 |
| Characteristics | |
| Spectral type | G8 III |
| B−V color index | +0.93 |
| Astrometry | |
| Radial velocity (Rv) | 44.8±0.8 km/s |
| Proper motion (μ) | RA: +102.65 mas/yr Dec.: +9.35 mas/yr |
| Parallax (π) | 11.82 ± 0.30 mas |
| Distance | 276 ± 7 ly (85 ± 2 pc) |
| Absolute magnitude (MV) | +0.52 |
| Details | |
| Luminosity | 64 L☉ |
| Surface gravity (log g) | 2.69±0.05 cgs |
| Temperature | 4,954±22 K |
| Metallicity [Fe/H] | −0.37±0.02 dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an evolved G-type giant star with a stellar classification of G8 III. It is radiating an estimated 64 times the solar luminosity from its outer atmosphere at an effective temperature of 4,954 K.
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