Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Circinus |
Right ascension | 15h 04m 48.18600s[1] |
Declination | −64° 01′ 52.8611″[1] |
Apparent magnitude (V) | 5.17[2] |
Characteristics | |
Spectral type | G8 III[3] |
B−V color index | +0.93[2] |
Astrometry | |
Radial velocity (Rv) | 44.8±0.8[4] km/s |
Proper motion (μ) | RA: +102.65[1] mas/yr Dec.: +9.35[1] mas/yr |
Parallax (π) | 11.82 ± 0.30 mas[1] |
Distance | 276 ± 7 ly (85 ± 2 pc) |
Absolute magnitude (MV) | +0.52[5] |
Details | |
Luminosity | 64[6] L☉ |
Surface gravity (log g) | 2.69±0.05[7] cgs |
Temperature | 4,954±22[7] K |
Metallicity [Fe/H] | −0.37±0.02[7] dex |
Other designations | |
Database references | |
SIMBAD | data |
Eta Circini, Latinized from η Circini, is the Bayer designation for a solitary[9] star located in the southern constellation of Circinus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.17.[2] The distance to this star, as determined from an annual parallax shift of 11.82 mas,[1] is around 276 light years.
This is an evolved G-type giant star with a stellar classification of G8 III.[3] It is radiating an estimated 64[6] times the solar luminosity from its outer atmosphere at an effective temperature of 4,954 K.[7]