HD 45866

Star in the constellation of Camelopardalis
HD 45866
Location of HD 45866 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 06h 40m 28.87701s[1]
Declination +77° 59′ 44.8179″[1]
Apparent magnitude (V) 5.72±0.01[2]
Characteristics
Spectral type K5 III[3]
B−V color index +1.47[4]
Astrometry
Radial velocity (Rv)−16.6±0.2[5] km/s
Proper motion (μ) RA: +13.997 mas/yr[1]
Dec.: −5.701 mas/yr[1]
Parallax (π)4.4952 ± 0.0455 mas[1]
Distance726 ± 7 ly
(222 ± 2 pc)
Absolute magnitude (MV)−0.89[6]
Details
Mass2.34±0.69[7] M☉
Radius49.6±2.6[8] R☉
Luminosity468±8[1] L☉
Surface gravity (log g)1.62±0.11[7] cgs
Temperature4,207±140[9] K
Metallicity [Fe/H]−0.11±0.01[10] dex
Age1.15+0.51
−0.35[7] Gyr
Other designations
AG+78°144, BD+78°227, FK5 2507, GC 8574, HD 45866, HIP 31940, HR 2363, SAO 5919[11]
Database references
SIMBADdata

HD 45866, also known as HR 2363 is a solitary star[12] located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orange-hued star with an apparent magnitude of 5.72.[2] Gaia DR3 parallax measurements place it 726 light years away and it is currently approaching the Solar System with a heliocentric radial velocity of −16.6 km/s.[5] At its current distance, HD 45866's brightness is diminished by 0.26 magnitudes due to interstellar dust.[13] It has an absolute magnitude of −0.89[6]

This is an evolved red giant with a stellar classification of K5 III.[3] It has 2.34 times the mass of the Sun[7] but it has expanded to nearly 50 times the radius of the Sun[8] at an age of 1.15 billion years.[7] It radiates 468 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 4,207 K.[9] It has an iron abundance 78% of the Sun's,[10] making it slightly metal deficient.

References

  1. ^ a b c d e f 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.
  2. ^ a b 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. ^ a b Adams, Walter S.; Joy, Alfred H.; Humason, Milton L.; Brayton, Ada Margaret (April 1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". The Astrophysical Journal. 81: 187. Bibcode:1935ApJ....81..187A. doi:10.1086/143628. eISSN 1538-4357. ISSN 0004-637X.
  4. ^ Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode:1970Priv.........0H.
  5. ^ a b 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 and Astrophysics. 430: 165. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. eISSN 1432-0746. ISSN 0004-6361. S2CID 17804304.
  6. ^ a b 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
  7. ^ a b c d e Feuillet, Diane K.; Bovy, Jo; Holtzman, Jon; Girardi, Léo; MacDonald, Nick; Majewski, Steven R.; Nidever, David L. (20 January 2016). "Determining Ages of APOGEE Giants with Known Distances". The Astrophysical Journal. 817 (1): 40. arXiv:1511.04088. Bibcode:2016ApJ...817...40F. doi:10.3847/0004-637X/817/1/40. eISSN 1538-4357.
  8. ^ a b Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics. 426 (1): 297–307. arXiv:astro-ph/0404180. Bibcode:2004A&A...426..297K. doi:10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361.
  9. ^ a b Bai, Yu; Liu, JiFeng; Bai, ZhongRui; Wang, Song; Fan, DongWei (2 August 2019). "Machine-learning Regression of Stellar Effective Temperatures in the Second Gaia Data Release". The Astronomical Journal. 158 (2): 93. arXiv:1906.09695. Bibcode:2019AJ....158...93B. doi:10.3847/1538-3881/ab3048. eISSN 1538-3881.
  10. ^ a b Sprague, Dani; et al. (8 March 2022). "APOGEE Net: An Expanded Spectral Model of Both Low-mass and High-mass Stars". The Astronomical Journal. 163 (4): 152. arXiv:2201.03661. Bibcode:2022AJ....163..152S. doi:10.3847/1538-3881/ac4de7. eISSN 1538-3881. ISSN 0004-6256.
  11. ^ "HD 45866". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved January 19, 2023.
  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. S2CID 14878976.
  13. ^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv:1709.01160. Bibcode:2017MNRAS.472.3805G. doi:10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711.
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