HD 34255
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 05h 20m 22.61066s |
| Declination | +62° 39′ 13.3608″ |
| Apparent magnitude (V) | 5.60±0.01 |
| Characteristics | |
| Spectral type | K4 I |
| U−B color index | +2.00 |
| B−V color index | +1.75 |
| Astrometry | |
| Radial velocity (Rv) | −7.7±0.15 km/s |
| Proper motion (μ) | RA: −3.105 mas/yr Dec.: −2.373 mas/yr |
| Parallax (π) | 1.9726±0.0788 mas |
| Distance | 1,650 ± 70 ly (510 ± 20 pc) |
| Absolute bolometric magnitude (Mbol) | −4.40±0.24 |
| Details | |
| Mass | 6.9±0.9 M☉ |
| Radius | 145 R☉ |
| Luminosity | 6,101 L☉ |
| Surface gravity (log g) | 1.14 cgs |
| Temperature | 3,927±170 K |
| Metallicity [Fe/H] | −0.01±0.05 dex |
| Age | 46±6 Myr |
| Other designations | |
| AG+62°410, BD+62°742, FK5 2397, GC 6496, HD 34255, HIP 24914, HR 1720, SAO 13460 | |
| Database references | |
| SIMBAD | data |
HD 34255, also known HR 1720, is a star located in the northern circumpolar constellation Camelopardalis, the giraffe. It has an apparent magnitude of 5.60, allowing it to be faintly visible to the naked eye. The object is located relatively far at a distance of about 1.65 kly but is approaching the Solar System with a heliocentric radial velocity of −7.7 km/s.
This is a solitary, evolved red supergiant with a stellar classification of K4 I. It has 6.9 times the mass of the Sun and is said to be 46 million years old. Despite the young age, it has already ceased hydrogen fusion at its core and now has an enlarged radius of 145 R☉. HD 34255 radiates a bolometric luminosity over 6,000 times that of the Sun from its photosphere at an effective temperature of 3,927 K, giving it an orange glow. The star's metallicity – what astronomers dub as elements heavier than helium – is around solar level.
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- 1 2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
- 1 2 Adams, Walter S.; Joy, Alfred H.; Humason, Milton L.; Brayton, Ada Margaret (April 1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". The Astrophysical Journal. 81: 187. Bibcode:1935ApJ....81..187A. doi:10.1086/143628. eISSN 1538-4357. ISSN 0004-637X.
- 1 2 Argue, A. N. (1 September 1966). "UBV Photometry of 550 F, G and K Type Stars". Monthly Notices of the Royal Astronomical Society. 133 (4): 475–493. Bibcode:1966MNRAS.133..475A. doi:10.1093/mnras/133.4.475. eISSN 1365-2966. ISSN 0035-8711.
- 1 2 Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
- 1 2 3 4 5 Messineo, M.; Brown, A. G. A. (18 June 2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal. 158 (1): 20. arXiv:1905.03744. Bibcode:2019AJ....158...20M. doi:10.3847/1538-3881/ab1cbd. eISSN 1538-3881.
- 1 2 3 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (October 12, 2010). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410 (1). Oxford University Press (OUP): 190–200. arXiv:1007.4883. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x. ISSN 0035-8711.
- 1 2 McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. eISSN 1365-2966. ISSN 0035-8711.
- 1 2 3 Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2 December 2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics. 525: A71. arXiv:1009.1491. Bibcode:2011A&A...525A..71W. doi:10.1051/0004-6361/201015014. eISSN 1432-0746. ISSN 0004-6361.
- ↑ "HD 34255". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 September 2022.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. eISSN 1365-2966. ISSN 0035-8711.
