Gamma Doradus
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Dorado |
| Right ascension | 04h 16m 01.5857s |
| Declination | −51° 29′ 11.933″ |
| Apparent magnitude (V) | 4.25 |
| Characteristics | |
| Spectral type | F0V |
| U−B color index | +0.03 |
| B−V color index | +0.30 |
| R−I color index | +0.16 |
| Variable type | Gamma Doradus variable |
| Astrometry | |
| Radial velocity (Rv) | 25.2 ± 2 km/s |
| Proper motion (μ) |
RA: 100.57 mas/yr Dec.: 184.23 mas/yr |
| Parallax (π) | 49.26 ± 0.50mas |
| Distance | 66.2 ± 0.7 ly (20.3 ± 0.2 pc) |
| Absolute magnitude (MV) | 2.72 |
| Details | |
| Mass | 1.57 M☉ |
| Radius | 1.70 R☉ |
| Luminosity (bolometric) | 7.0 L☉ |
| Temperature | 7200 K |
| Metallicity | [M/H] = −0.02 |
| Rotational velocity (v sin i) | 62 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Gamma Doradus (Gamma Dor, γ Doradus, γ Dor) is the third-brightest star in the constellation of Dorado. It has an apparent visual magnitude of approximately 4.25 and is a variable star, the type star of the class of Gamma Doradus variables. These stars, like γ Doradus, are pulsating variables which vary in brightness by less than a tenth of a magnitude owing to nonradial gravity wave oscillations. The magnitude of γ Doradus itself has been observed to have two sinusoidal variations with periods of approximately 17.6 and 18.2 hours. There is also some additional unexplained, apparently random fluctuation.
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