Gamma Equulei
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Equuleus |
| Right ascension | 21h 10m 20.50005s |
| Declination | +10° 07′ 53.6763″ |
| Apparent magnitude (V) | 4.58 - 4.77 |
| Characteristics | |
| Spectral type | A9VpSrCrEu |
| U−B color index | +0.10 |
| B−V color index | +0.26 |
| R−I color index | +0.10 |
| Variable type | roAp |
| Astrometry | |
| Radial velocity (Rv) | −16.489±0.0004 km/s |
| Proper motion (μ) | RA: 48.74 mas/yr Dec.: mas/yr |
| Parallax (π) | 27.55±0.62 mas |
| Distance | 118 ± 3 ly (36.3 ± 0.8 pc) |
| Absolute magnitude (MV) | +1.90 |
| Details | |
| Mass | 1.78+0.12 −0.17 M☉ |
| Radius | 2.11±0.07 R☉ |
| Luminosity | 11.0±0.93 L☉ |
| Surface gravity (log g) | 4.47 cgs |
| Temperature | 7,550±150 K |
| Metallicity [Fe/H] | +0.68 dex |
| Rotational velocity (v sin i) | 7.0±0.5 km/s |
| Age | 1.0 Gyr |
| Other designations | |
| γ Equ, 5 Equ, BD+09°4732, FK5 1555, HD 201601, HIP 104521, HR 8097, SAO 126593 | |
| Database references | |
| SIMBAD | data |
Gamma Equulei, Latinized from γ Equulei, is a double star in the northern constellation of Equuleus. It is located at a distance of around 118 light-years (36 parsecs) from Earth and is visible to the naked eye with a slightly variable apparent visual magnitude of around 4.7. The star is drifting closer to the Sun with a radial velocity of −16.5 km/s.