Alpha Chamaeleontis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Chamaeleon |
| Right ascension | 08h 18m 31.55319s |
| Declination | −76° 55′ 10.9964″ |
| Apparent magnitude (V) | 4.06 |
| Characteristics | |
| Spectral type | F5VFe-0.8 |
| U−B color index | −0.04 |
| B−V color index | +0.40 |
| Astrometry | |
| Proper motion (μ) |
RA: −0.13 mas/yr Dec.: +6.89 mas/yr |
| Parallax (π) | 51.12 ± 0.12mas |
| Distance | 63.8 ± 0.1 ly (19.56 ± 0.05 pc) |
| Details | |
| Mass | 1.42 M☉ |
| Luminosity | 7.64 L☉ |
| Surface gravity (log g) | 4.28±0.14 cgs |
| Temperature | 6,776±230 K |
| Metallicity [Fe/H] | −0.26 dex |
| Rotational velocity (v sin i) | 0 km/s |
| Age | 1.8 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Alpha Chamaeleontis (α Cha, α Chamaeleontis) is a solitarystar in the southern circumpolar constellation of Chamaeleon. It has an apparent visual magnitude of 4.06 and thus is bright enough to be seen with the naked eye. With an annual parallax shift of 51.12 mas, it is located 63.8 light years from the Sun.
This is an F-type main sequence star with a stellar classification of F5 V Fe−0.8, where 'Fe−0.8' indicates an anomalously low abundance of iron. It has an estimated 1.4 times the mass of the Sun, and radiates 7.64 times the solar luminosity from its outer atmosphere at an effective temperature of 6,776 K. The star is around 1.8 billion years old with a projected rotational velocity that is too low to be measured. The star has been examined for an infrared excess that would suggest the presence of an orbiting debris disk, but none was found.
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