HD 25291
  | |
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 04h 04m 27.16294s |
| Declination | +59° 09′ 19.8327″ |
| Apparent magnitude (V) | 5.12 |
| Characteristics | |
| Spectral type | F0 II |
| U−B color index | +0.47 |
| B−V color index | +0.15 |
| Variable type | constant |
| Astrometry | |
| Radial velocity (Rv) | −20.3±0.8 km/s |
| Proper motion (μ) | RA: −3.380 mas/yr Dec.: +1.027 mas/yr |
| Parallax (π) | 1.5558±0.1047 mas |
| Distance | 2,100 ± 100 ly (640 ± 40 pc) |
| Absolute magnitude (MV) | −3.91 |
| Details | |
| Mass | 8.78±0.65 M☉ |
| Radius | 50.1 R☉ |
| Luminosity (bolometric) | 9,878 L☉ |
| Surface gravity (log g) | 1.87 cgs |
| Temperature | 7,425 K |
| Metallicity [Fe/H] | −0.07 dex |
| Rotational velocity (v sin i) | 6.8±2 km/s |
| Age | 32 Myr |
| Other designations | |
| AG+59°399, BD+58°690, FK5 2290, GC 4858, HD 25291, HIP 19018, HR 1242, SAO 24384 | |
| Database references | |
| SIMBAD | data |
HD 25291, also known as HR 1242, is a solitary, yellowish-white hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.12, making it one of the brighter members of this generally faint constellation. The object is relatively far at a distant of approximately 2,100 light years but is drifting closer with a heliocentric radial velocity of −20.3 km/s.
HD 25291 has a general stellar classification of F0 II, which indicates that it is an evolved early F-type bright giant. It has also been given a class of F2 Ia, instead suggesting a slightly cooler and more luminous supergiant. Nevertheless, it has 8.8 times the mass of the Sun but at an age of 32 million years, it has expanded to 50.1 times its girth. It radiates at a bolometric luminosity 9,878 times greather that of the Sun from its enlarged photosphere at an effective temperature of 7,425 K. HD 25291 is slightly metal deficient, with an iron abundance 85% of solar levels. It spins modestly with a projected rotational velocity of 6.8 km/s.
Tetzlaff et al. (2011) found the object to be a runaway star with a peculiar velocity of 25.7+1.9
−4.1 km/s, which is high compared to neighboring stars.
References
- 1 2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
- 1 2 3 4 5 6 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- 1 2 3 4 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". VizieR Online Data Catalog. 2237. Bibcode:2002yCat.2237....0D.
- 1 2 Gray, R. O.; Napier, M. G.; Winkler, L. I. (April 2001). "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars". The Astronomical Journal. 121 (4): 2148–2158. Bibcode:2001AJ....121.2148G. doi:10.1086/319956. ISSN 0004-6256.
- ↑ Adelman, S. J.; Cay, I. H.; Cay, M. T.; Kocer, D. (September 2000). "On the Variability of A6 to F9 Supergiants". Information Bulletin on Variable Stars. 4947: 1. Bibcode:2000IBVS.4947....1A. ISSN 0374-0676.
- 1 2 Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. eISSN 1562-6873. ISSN 1063-7737. S2CID 119231169.
- 1 2 3 4 5 Hohle, M.M.; Neuhäuser, R.; Schutz, B.F. (April 2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349–360. arXiv:1003.2335. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355. eISSN 1521-3994. ISSN 0004-6337. S2CID 111387483.
- 1 2 Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. eISSN 1538-3881.
- 1 2 3 4 5 6 Lyubimkov, Leonid S.; Lambert, David L.; Korotin, Sergey A.; Rachkovskaya, Tamara M.; Poklad, Dmitry B. (8 December 2014). "Carbon abundance and the N/C ratio in atmospheres of A-, F- and G-type supergiants and bright giants". Monthly Notices of the Royal Astronomical Society. 446 (4): 3447–3460. arXiv:1411.2722. Bibcode:2015MNRAS.446.3447L. doi:10.1093/mnras/stu2299. eISSN 1365-2966. ISSN 0035-8711.
- ↑ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. eISSN 1432-0746. ISSN 0004-6361.
- ↑ "HR 1242". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved August 14, 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.
- ↑ Hardorp, J.; Rohlfs, K.; Slettebak, A.; Stock, J. (1959). "Luminous stars in the Northern Milky Way. Part I.". Hamburger Sternw. Warner & Swasey Obs. C01: 0. Bibcode:1959LS....C01....0H.
- ↑ 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.
