Global InformationGamma Equulei information
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Equuleus |
| Right ascension | 21h 10m 20.50005s[1] |
| Declination | 10° 07′ 53.6763″[1] |
| Apparent magnitude (V) | 4.58 - 4.77[2] |
| Characteristics | |
| Spectral type | A9VpSrCrEu[3] |
| U−B color index | +0.10[4] |
| B−V color index | +0.26[4] |
| R−I color index | +0.10 |
| Variable type | roAp[5] |
| Astrometry | |
| Radial velocity (Rv) | −16.489±0.0004[6] km/s |
| Proper motion (μ) | RA: 48.74[1] mas/yr Dec.: mas/yr |
| Parallax (π) | 27.55 ± 0.62 mas[1] |
| Distance | 118 ± 3 ly (36.3 ± 0.8 pc) |
| Absolute magnitude (MV) | +1.90[7] |
| Details | |
| Mass | 1.78+0.12 −0.17[8] M☉ |
| Radius | 2.11±0.07[9] R☉ |
| Luminosity | 11.0±0.93[9] L☉ |
| Surface gravity (log g) | 4.47[10] cgs |
| Temperature | 7,550±150[9] K |
| Metallicity [Fe/H] | +0.68[10] dex |
| Rotational velocity (v sin i) | 7.0±0.5[8] km/s |
| Age | 1.0[8] Gyr |
| Other designations | |
γ Equ, 5 Equ, BD+09°4732, FK5 1555, HD 201601, HIP 104521, HR 8097, SAO 126593[11] | |
| 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.[6]
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