HD 205765 is a star in the equatorial constellation of Aquarius. It is an A-type main sequence star with an apparent magnitude of 6.2, which, according to the Bortle scale, makes it faintly visible to the naked eye from dark rural skies. This star is spinning rapidly with a projected rotational velocity of 172 km/s.[6]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 21h 37m 33.77302s[1] |
| Declination | −00° 23′ 25.7789″[1] |
| Apparent magnitude (V) | 6.2491[1] |
| Characteristics | |
| Spectral type | A2V[2] |
| U−B color index | +0.055[3] |
| B−V color index | +0.055[3] |
| Astrometry | |
| Radial velocity (Rv) | +16.9[4] km/s |
| Proper motion (μ) | RA: +177[1] mas/yr Dec.: −109[1] mas/yr |
| Parallax (π) | 8.86 ± 0.39 mas[1] |
| Distance | 370 ± 20 ly (113 ± 5 pc) |
| Details | |
| Radius | 1.7[5] R☉ |
| Rotational velocity (v sin i) | 172.2±2.2[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |