Astronomy:HD 134335
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Short description: Star in the constellation Boötes
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Boötes[1] |
| Right ascension | 15h 08m 35.56370s[2] |
| Declination | +25° 06′ 31.0833″[2] |
| Apparent magnitude (V) | 5.9781±0.0007[3] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | K1III[4] |
| B−V color index | 1.24[4] |
| Astrometry | |
| Radial velocity (Rv) | −18.17±0.23[3] km/s |
| Proper motion (μ) | RA: −3.759[2] mas/yr Dec.: −0.806[2] mas/yr |
| Parallax (π) | 6.8281 ± 0.0380[2] mas |
| Distance | 478 ± 3 ly (146.5 ± 0.8 pc) |
| Absolute magnitude (MV) | 0.05[1] |
| Details | |
| Mass | 3.7[2] M☉ |
| Radius | 19[2] R☉ |
| Luminosity | 126.6[5] L☉ |
| Surface gravity (log g) | 2.38[2] cgs |
| Temperature | 4,409[5] K |
| Rotational velocity (v sin i) | 1.1[4] km/s |
| Age | 217[2] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 134335 is a giant star in the northern constellation of Boötes. As a sixth magnitude star,[3] it is dimly visible to the naked eye under favorable viewing conditions. It is located at a distance of approximately 478 light years based on parallax measurements,[2] and is drifting closer with a heliocentric radial velocity of −18 km/s.[3] It may approach as close as 37.3 ly (11.43 pc) in about 7.6 million years.[1]
The stellar classification of HD 134335 is K1III,[4] matching a K-type giant star that has exhausted the supply of hydrogen at its core and expanded. It is radiating 127 times the luminosity of the Sun from its photosphere at an effective temperature of 4,409 K.[5]
References
- ↑ 1.0 1.1 1.2 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 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.
- ↑ 3.0 3.1 3.2 3.3 Famaey, B. et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics 430: 165–186, doi:10.1051/0004-6361:20041272, Bibcode: 2005A&A...430..165F.
- ↑ 4.0 4.1 4.2 4.3 De Medeiros, J. R.; Mayor, M. (1999), "A catalog of rotational and radial velocities for evolved stars", Astronomy and Astrophysics Supplement Series 139 (3): 433, doi:10.1051/aas:1999401, Bibcode: 1999A&AS..139..433D.
- ↑ 5.0 5.1 5.2 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M.
- ↑ "HD 134335". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+134335.
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