Eta Chamaeleontis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Chamaeleon |
| Right ascension | 08h 41m 19.51442s |
| Declination | −78° 57′ 48.1023″ |
| Apparent magnitude (V) | 5.453 |
| Characteristics | |
| Spectral type | B8V |
| U−B color index | −0.34 |
| B−V color index | −0.10 |
| Astrometry | |
| Radial velocity (Rv) | 14.00 km/s |
| Proper motion (μ) | RA: −29.776 mas/yr Dec.: +26.600 mas/yr |
| Parallax (π) | 10.0442±0.0912 mas |
| Distance | 325 ± 3 ly (99.6 ± 0.9 pc) |
| Absolute magnitude (MV) | +0.57 |
| Details | |
| Mass | 3.20+0.06 −0.07 M☉ |
| Radius | 3.3 R☉ |
| Luminosity | 99.81±52.10 L☉ |
| Temperature | 12,487±98 K |
| Rotational velocity (v sin i) | 390 km/s |
| Age | 8–14 Myr |
| Other designations | |
| η Cha, CPD−78°372, GC 12063, HD 75416, HIP 42637, HR 3502, SAO 256543 | |
| Database references | |
| SIMBAD | data |
Eta Chamaeleontis, Latinized from η Chamaeleontis, is a star in the constellation Chamaeleon. It has an apparent magnitude of about 5.5, meaning that it is just barely visible to the naked eye. Based upon parallax measurements, this star is located some 325 light-years (100 parsecs) light years (95 parsecs) away from the Sun.
Eta Chamaeleontis has a spectral type of B8V, meaning it is a B-type main sequence star. Stars of this type are typically a few times more massive than the Sun and have effective temperatures of about 10,000 to 30,000 K. Eta Chamaeleontis is just over 3 times more massive than the Sun and has a temperature of about 12,000 K.