Jump to content

HD 46509

Edit links
From Wikipedia, the free encyclopedia
HD 46509
Location of HD 46509 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 06h 40m 32.25255s[1]
Declination +71° 44′ 55.6296″[1]
Apparent magnitude (V) 5.86±0.01[2]
Characteristics
Spectral type G9 III[3] or K0 III[4]
B−V color index +1.19[5]
Astrometry
Radial velocity (Rv)−24.02±0.19[6] km/s
Proper motion (μ) RA: +4.653 mas/yr[1]
Dec.: +11.103 mas/yr[1]
Parallax (π)4.1248 ± 0.0376 mas[1]
Distance791 ± 7 ly
(242 ± 2 pc)
Absolute magnitude (MV)−0.98[7]
Details
Mass5.64±1.82[8] M☉
Radius27.3±0.6[1] R☉
Luminosity399±7[1] L☉
Surface gravity (log g)2.34±0.11[8] cgs
Temperature4,675±92[8] K
Metallicity [Fe/H]+0.12±0.05[8] dex
Rotational velocity (v sin i)1.5±1.2[9] km/s
Age339+78
−63[8] Myr
Other designations
AG+71°216, BD+71°359, FK5 2511, GC 8630, HD 46509, HIP 31946, HR 2396, SAO 5925[10]
Database references
SIMBADdata

HD 46509, also designated as HR 2396, is a solitary star located in the northern circumpolar constellation Camelopardalis, the giraffe. It is faintly visible to the naked eye as a yellowish-orange hued point of light with an apparent magnitude of 5.86.[2] The object is located relatively far at a distance of 791 light-years based on Gaia DR3 parallax measurements,[1] but it is drifting closer with a heliocentric radial velocity of −24.02 km/s.[6] At its current distance, HD 46509's brightness is diminished by interstellar extinction of 0.31 magnitudes and it has an absolute magnitude of −0.98.[7]

HD 46509 has a stellar classification of either G9 III or K0 III,[3][4] with both classes indicating that it is an evolved red giant. It is estimated to be 339 million years old,[8] enough time for it to cool and expand to 27.3 times the radius of the Sun.[1] HD 46509 has about 5.6 times the mass of the Sun[8] and it radiates 399 times the luminosity of the Sun[1] from its enlarged photosphere at an effective temperature of 4,675 K.[8] It is metal enriched with an iron abundance 132% that of the Sun's ([Fe/H] = +0.12)[8] and like most giant stars, it spins slowly with a projected rotational velocity of approximately 1.5 km/s.[9]

References

[edit]
  1. ^ a b c d e f g h i 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. S2CID 17128864.
  3. ^ a b Wilson, Ralph E.; Joy, Alfred H. (March 1950). "Radial Velocities of 2111 Stars". The Astrophysical Journal. 111: 221. Bibcode:1950ApJ...111..221W. doi:10.1086/145261. eISSN 1538-4357. ISSN 0004-637X. S2CID 122883647.
  4. ^ a b Halliday, Ian (September 1955). "Luminosity Function and Space Motions of G8-K1 Stars Derived from Spectroscopic Parallaxes". The Astrophysical Journal. 122: 222. Bibcode:1955ApJ...122..222H. doi:10.1086/146080. ISSN 0004-637X. S2CID 119640884.
  5. ^ Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode:1970Priv.........0H. S2CID 231475662.
  6. ^ 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. S2CID 17804304.
  7. ^ 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.
  8. ^ a b c d e f g h i 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. S2CID 118675933.
  9. ^ a b 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. S2CID 54046583.
  10. ^ "HD 46509". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved July 17, 2023.
Retrieved from "https://en.wikipedia.org/w/index.php?title=HD_46509&oldid=1187548393"