Astronomy:Gliese 638
From HandWiki
Short description: Star in the constellation Hercules
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Hercules |
| Right ascension | 16h 45m 06.35054s[1] |
| Declination | +33° 30′ 33.2138″[1] |
| Apparent magnitude (V) | 8.11 |
| Characteristics | |
| Spectral type | K7V[2] |
| U−B color index | 1.29 |
| B−V color index | 1.37 |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | −32.05±0.13[1] km/s |
| Proper motion (μ) | RA: -39.939[1] mas/yr Dec.: 382.224[1] mas/yr |
| Parallax (π) | 101.5615 ± 0.0150[1] mas |
| Distance | 32.114 ± 0.005 ly (9.846 ± 0.001 pc) |
| Absolute magnitude (MV) | 8.11[3] |
| Other designations | |
| Database references | |
| SIMBAD | data |
Gliese 638 is a main sequence star in the constellation of Hercules. It is located about 32.1 light-years from the Earth. This is a suspected variable star with a measured apparent magnitude that ranges from 8.09–8.11.[5] As a K-class star, it has a lower mass than the Sun, and consequently is less luminous.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ Wilson, O. C. (1962). "Relationship between colors and spectra of late main-sequence stars". Astrophysical Journal 136: 793–799. doi:10.1086/147437. Bibcode: 1962ApJ...136..793W.
- ↑ Holmberg, J. et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics 501 (3): 941–947, doi:10.1051/0004-6361/200811191, Bibcode: 2009A&A...501..941H.
- ↑ "HD 151288". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+151288.
- ↑ Kukarkin, B. V. (1981). Catalogue of suspected variable stars. Moscow, USSR: Academy of Sciences.
 |
