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HD 26764 (HR 1314) is a solitary[9] star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.19, making it faintly to the naked eye if seen under ideal conditions. The star is currently situated at a distance of 266 light years[1] but is drifting closer with a heliocentric radial velocity of 3.0 km/s,[6] which is poorly constrained.

HD 26764
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 04h 16m 43.0917s[1]
Declination +53° 36′ 42.4808″[1]
Apparent magnitude (V) 5.19 ± 0.01[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type A2 Vn[4]
B−V color index 0.052±0.004[5]
Astrometry
Radial velocity (Rv)−3.0 ± 3.1[6] km/s
Proper motion (μ) RA: −17.700 mas/yr[1]
Dec.: −0.218 mas/yr[1]
Parallax (π)12.2443 ± 0.1844 mas[1]
Distance266 ± 4 ly
(82 ± 1 pc)
Absolute magnitude (MV)+0.21[5]
Details[7]
Mass2.78[3] M☉
Radius3.2 ± 0.1[8] R☉
Luminosity94.1+13.7
−12[3] L☉
Surface gravity (log g)3.77 cgs
Temperature9,825 ± 334 K
Rotational velocity (v sin i)228 km/s
Age162 Myr
Other designations
AG+53°373, BD+53°750, GC 5132, HD 26764, HIP 19949, HR 1314, SAO 24512
Database references
SIMBADdata

HD 26764 has a stellar classification of A2 Vn, indicating that the object is an A-type main-sequence star with broad (nebulous) absorption lines due to rotation.[4] At present it has 2.78 times the mass of the Sun[7] and 3.2 times the Sun’s radius.[8] It radiates at 94.12 solar luminosities from its photosphere at an effective temperature of 9,825 K,[7] giving it a white glow. HD 26764 is a young star with an age of 169 million years and spins rapidly with a projected rotational velocity of 228 km/s.[7]


References


  1. 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.
  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.
  3. Zorec, J.; Royer, F. (January 2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. ISSN 0004-6361. S2CID 55586789.
  4. Cowley, A. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications.", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
  5. Anderson, E. (May 2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331–346, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644
  6. 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. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN 1063-7737.
  7. David, Trevor J.; Hillenbrand, Lynne A. (12 May 2015). "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804: 146. arXiv:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. ISSN 0004-637X.
  8. 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. ISSN 0004-6256.
  9. Eggleton, P. P.; Tokovinin, A. A. (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, S2CID 14878976


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