HD 25291

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HD 25291
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension 04h 04m 27.16s[1]
Declination +59° 09′ 19.84″[1]
Apparent magnitude (V) 5.12[2]
Characteristics
Spectral type F0II[3]
Apparent magnitude (U) 6.10[2]
Apparent magnitude (B) 5.63[2]
Apparent magnitude (R) 4.62[2]
Apparent magnitude (I) 4.24[2]
U−B color index +0.47[2]
B−V color index +0.51[2]
R−I color index +0.38[2]
Astrometry
Radial velocity (Rv)−20.3±0.8[4] km/s
Proper motion (μ) RA: −2.811±0.193[1] mas/yr
Dec.: +0.762±0.198[1] mas/yr
Parallax (π)1.4658 ± 0.1270[1] mas
Distance2,200 ± 200 ly
(680 ± 60 pc)
Absolute magnitude (MV)−3.91[5]
Details
Mass8.78±0.65[6] M☉
Radius16[7] R☉
Luminosity (bolometric)9,878[6] L☉
Surface gravity (log g)1.5[8] cgs
Temperature7,425[6] K
Metallicity129% solar
Metallicity [Fe/H]+0.11[8] dex
Other designations
BD+58 690, HD 25291, HIP 19018, HR 1242, SAO 24384
Database references
SIMBADdata

HD 25291 (HR 1242) is a solitary star located in the northern circumpolar constellation Camelopardalis. With an apparent magnitude of 5.12, it is one of the brighter members of the constellation. The star is located 2,200 light-years (670 parsecs) based on parallax, but is drifting closer with a heliocentric radial velocity of −20.3 km/s.

HD 25291 has a classification of F0 II, which indicates that it is an evolved early F-type bright giant. At present it has 8.8 times the Sun's mass, but has expanded to 16 times its girth. It radiates at a bolometric luminosity 9878 times that of the Sun from its enlarged photosphere at an effective temperature of 7,425 K, which gives it a whitish hue; HD 25291 is slightly enriched in metals.

References[]

  1. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c d e f g h 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.
  3. ^ Gray, R. O.; Napier, M. G.; Winkler, L. I. (1 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.
  4. ^ Gontcharov, G. A. (1 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. ISSN 1063-7737. S2CID 119231169.
  5. ^ Anderson, E.; Francis, Ch. (1 May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737. S2CID 119257644.
  6. ^ a b c Hohle, M. M.; Neuhäuser, R.; Schutz, B. F. (1 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. ISSN 0004-6337. S2CID 111387483.
  7. ^ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (1 February 2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy and Astrophysics. 367 (2): 521–524. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451. ISSN 0004-6361. S2CID 425754.
  8. ^ a b Cayrel de Strobel, G.; Soubiran, C.; Friel, E. D.; Ralite, N.; Francois, P. (1 August 1997). "A catalogue of [Fe/H] determinations: 1996 edition". Astronomy and Astrophysics Supplement Series. 124: 299–305. doi:10.1051/aas:1997194. ISSN 0365-0138.
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