HD 25291

Last updated
HD 25291
Camelopardalis constellation map.svg
Red circle.svg
location of HD 25291 in red
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Camelopardalis [1]
Right ascension 04h 04m 27.16294s [2]
Declination +59° 09′ 19.8327″ [2]
Apparent magnitude  (V)5.12 [3]
Characteristics
Spectral type F0 II [4]
U−B color index +0.47 [3]
B−V color index +0.15 [3]
Variable type constant [5]
Astrometry
Radial velocity (Rv)−20.3±0.8 [6] km/s
Proper motion (μ)RA: −3.380 mas/yr [2]
Dec.: +1.027 mas/yr [2]
Parallax (π)1.5558±0.1047  mas [2]
Distance 2,100 ± 100  ly
(640 ± 40  pc)
Absolute magnitude  (MV)−3.91 [1]
Details
Mass 8.78±0.65 [7]   M☉
Radius 50.1 [8]   R☉
Luminosity (bolometric)9,878 [7]   L☉
Surface gravity (log g)1.87 [9]   cgs
Temperature 7,425 [7]   K
Metallicity [Fe/H]−0.07 [9]   dex
Rotational velocity (v sin i)6.8±2 [10]  km/s
Age 32 [9]   Myr
Other designations
AG+59°399, BD+58°690, FK5 2290, GC 4858, HD 25291, HIP 19018, HR 1242, SAO 24384 [11]
Database references
SIMBAD data

HD 25291, also known as HR 1242, is a solitary, [12] yellowish-white hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.12, [3] 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 [2] but is drifting closer with a heliocentric radial velocity of −20.3  km/s . [6]

HD 25291 has a general stellar classification of F0 II, [4] which indicates that it is an evolved early F-type bright giant. It has also been given a class of F2 Ia, [13] instead suggesting a slightly cooler and more luminous supergiant. Nevertheless, it has 8.8 times the mass of the Sun [7] but at an age of 32 million years, [9] it has expanded to 50.1 times its girth. [8] 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 . [7] HD 25291 is slightly metal deficient, with an iron abundance 85% of solar levels. [9] It spins modestly with a projected rotational velocity of 6.8  km/s . [9]

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. [14]

References

  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. ↑ 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.
  6. 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.
  7. 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.
  8. 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.
  9. 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.
  10. ↑ 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.
  11. ↑ "HR 1242". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved August 14, 2022.
  12. ↑ 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.
  13. ↑ 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.
  14. ↑ 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.
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