HD 64307
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 08h 00m 11.7385s[1]
Declination +73° 55′ 04.5036″[1]
Apparent magnitude (V) 5.35±0.01[2]
Characteristics
Evolutionary stage red giant branch[3]
Spectral type K3 III[4]
U−B color index +1.64[5]
B−V color index +1.43[5]
Astrometry
Radial velocity (Rv)33.54±0.19[6] km/s
Proper motion (μ) RA: −8.194 mas/yr[1]
Dec.: −37.514 mas/yr[1]
Parallax (π)4.7407 ± 0.0741 mas[1]
Distance690 ± 10 ly
(211 ± 3 pc)
Absolute magnitude (MV)−1.77[7]
Details
Mass1.19[8] M☉
Radius49.9[9] R☉
Luminosity (bolometric)892[10] L☉
Surface gravity (log g)1.18[8] cgs
Temperature4,264±122[11] K
Metallicity [Fe/H]−0.1[12] dex
Rotational velocity (v sin i)<2[13] km/s
Other designations
AG+74°195, BD+74°338, FK5 300, GC 10745, HD 64307, HIP 39117, HR 3075, SAO 6378
Database references
SIMBADdata

HD 64307, also known as HR 3075, is a solitary,[14] orange hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.35,[2] allowing it to be faintly seen with the naked eye. Based on parallax measurements from the Gaia spacecraft, The object is estimated to be 690 light years[1] distant. It appears to be receding from the Sun, having a heliocentric radial velocity of 34 km/s.[6]

HD 64307 is an evolved star with a stellar classification of K3 III.[4] Gaia DR3 stellar evolution models place it on the red giant branch.[3] It has a mass comparable to the Sun[8] but due to its evolved state, it has an enlarged radius of 49.9 R☉. It shines with a bolometric luminosity of 892 L☉ from its photosphere at an effective temperature of 4,264 K.[11] HD 64307 has an iron abundance 80% that of the Sun, and is also lithium enriched.[12] Like most giant stars, the object spins slowly, having a projected rotational velocity lower than 2 km/s.[13]

References

  1. 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.
  2. 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.
  3. 1 2 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.
  4. 1 2 Roman, Nancy G. (July 1952). "The Spectra of the Bright Stars of Types F5-K5". The Astrophysical Journal. 116: 122. Bibcode:1952ApJ...116..122R. doi:10.1086/145598. ISSN 0004-637X.
  5. 1 2 Rybka, E. (1969). "The corrected magnitudes and colours of 278 stars msg ok near SA 1-139 in the UBV system". Acta Astronomica. 19: 229. Bibcode:1969AcA....19..229R. ISSN 0001-5237.
  6. 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 & Astrophysics. 430 (1): 165–186. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. ISSN 0004-6361.
  7. ↑ Anderson, E.; Francis, Ch. (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.
  8. 1 2 3 Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.
  9. ↑ Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics. 657: A7. arXiv:2109.10912. Bibcode:2022A&A...657A...7K. doi:10.1051/0004-6361/202142146. eISSN 1432-0746. ISSN 0004-6361.
  10. ↑ 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. ISSN 0035-8711.
  11. 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.
  12. 1 2 Brown, Jeffery A.; Sneden, Christopher; Lambert, David L.; Dutchover, Edward Jr. (October 1989). "A search for lithium-rich giant stars". The Astrophysical Journal Supplement Series. 71: 293. Bibcode:1989ApJS...71..293B. doi:10.1086/191375. eISSN 1538-4365. ISSN 0067-0049.
  13. 1 2 de Medeiros, J. R.; Mayor, M. (November 1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433–460. Bibcode:1999A&AS..139..433D. doi:10.1051/aas:1999401. ISSN 0365-0138.
  14. ↑ 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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