HD 46509

Last updated
HD 46509
Camelopardalis constellation map.svg
Red circle.svg
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]
Distance 791 ± 7  ly
(242 ± 2  pc)
Absolute magnitude  (MV)−0.98 [7]
Details
Mass 5.64±1.82 [8]   M☉
Radius 27.3±0.6 [1]   R☉
Luminosity 399±7 [1]   L☉
Surface gravity (log g)2.34±0.11 [8]   cgs
Temperature 4,675±92 [8]   K
Metallicity [Fe/H]+0.12±0.05 [8]   dex
Rotational velocity (v sin i)1.5±1.2 [9]  km/s
Age 339+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
SIMBAD data

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]

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<span class="mw-page-title-main">2 Piscis Austrini</span> Star in the constellation Microscopium

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<span class="mw-page-title-main">HD 26764</span> Star in the constellation Camelopardalis

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<span class="mw-page-title-main">HD 27022</span> Star in the constellation Camelopardalis

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<span class="mw-page-title-main">HD 76236</span> Star in the constellation Chamaeleon

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<span class="mw-page-title-main">HD 106248</span> Star in the constellation Chamaeleon

HD 106248, also known as HR 4649, is a solitary, orange hued star located in the southern circumpolar constellation Chamaeleon. It has an apparent magnitude of 6.34, placing it near the limit for naked eye visibility. Based on parallax measurements from Gaia DR3, the object is estimated to be 358 light years away from the Solar System. It appears to be receding with a heliocentric radial velocity of 34.5 km/s. At its current distance, HD 106248's brightness is diminished by 0.32 due to interstellar dust and Eggen (1993) lists it as a member of the old (thick) disk population.

28 Leonis Minoris is a solitary, orange hued star located in the northern constellation Leo Minor, the lesser lion. It has an apparent magnitude of 5.5, allowing it to be faintly visible to the naked eye. Based on parallax measurements from the Gaia satellite, it is estimated to be 480 light years distant. 28 LMi is approaching the Solar System with a heliocentric radial velocity of −24 km/s. At its current distance, the star brightness is diminished by 0.14 magnitudes due to interstellar dust.

<span class="mw-page-title-main">HD 36187</span> Star in the constellation of Columba

HD 36187, also known as HR 1835, is a solitary, bluish-white hued star located in the southern constellation Columba, the dove. It has an apparent magnitude of 5.55, making it faintly visible to the naked eye under ideal conditions. Based on parallax measurements from the Gaia spacecraft, it is estimated to be 282 light years away from the Solar System. However, it is receding rapidly with a heliocentric radial velocity of 50 km/s. At its current distance, HD 36187's brightness is diminished by 0.21 magnitude due to interstellar dust.

<span class="mw-page-title-main">HD 26755</span> Binary star system in Camelopardalis

HD 26755, also known as HR 1313, is a spectroscopic binary located in the northern circumpolar constellation Camelopardalis, the giraffe. It has an apparent magnitude of 5.72, making it faintly visible to the naked eye under ideal conditions. Gaia DR3 parallax measurements place the system at a distance of 271 light years and is currently drifitng closer with a heliocentric radial velocity of −38 km/s. At its current distance, HD 26755's brightness is diminished by 0.19 magnitudes due to interstellar dust.

<span class="mw-page-title-main">HD 117566</span> High proper motion star; Camelopardalis

HD 117566, also known as HR 5091, is a solitary yellow-hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.74, making it faintly visible to the naked eye. This object is relatively close at a distance of 291 light years based on Gaia DR3 parallax measurements but is receding with a heliocentric radial velocity of 14 km/s. At its current distance, HD 117566's brightness is diminished by 0.12 magnitudes due to interstellar dust.

<span class="mw-page-title-main">HD 45866</span> Star in the constellation of Camelopardalis

HD 45866, also known as HR 2363 is a solitary star 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. 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. At its current distance, HD 45866's brightness is diminished by 0.26 magnitudes due to interstellar dust. It has an absolute magnitude of −0.89

<span class="mw-page-title-main">HD 187420/187421</span> Binary star in the constellation Telescopium

HD 187420 and HD 187421, are the components of a binary star located in the southern constellation Telescopium. Gaia DR3 parallax measurements place the stars at a distance of 407 and 414 light years respectively. The two are separated by 23″, and they are approaching the Solar System with heliocentric radial velocities of −17.9 km/s and −21.5 km/s respectively.

<span class="mw-page-title-main">HD 25274</span> M-type giant in the constellation Camelopardalis

HD 25274, also known as HR 1241, is a solitary star located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as a red hued point of light with an apparent magnitude of 5.86. Gaia DR3 parallax measurements imply a distance of 597 light-years and it is currently drifting closer with a heliocentric radial velocity of −48.23 km/s. At its current distance, HD 25274's brightness is diminished by three-tenths of a magnitude due to interstellar extinction and it has an absolute magnitude of −0.51.

<span class="mw-page-title-main">HD 120565</span> Spectroscopic binary in the constellation Camelopardalis

HD 120565, also designated as HR 5203, is a star located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orange-hued point of light with an apparent magnitude of 5.91. Gaia DR3 parallax measurements imply a distance of 370 light-years and it is currently drifting closer with a heliocentric radial velocity of −45.2 km/s. At its current distance, HD 120565's brightness is diminished by 0.12 magnitudes due to interstellar extinction and it has an absolute magnitude of +0.48.

<span class="mw-page-title-main">51 Camelopardalis</span> K-type giant in the constellation Camelopardalis

51 Camelopardalis, also designated as HD 62066, is a solitary star located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orange-hued point of light with an apparent magnitude of 5.93. Gaia DR3 parallax measurements imply a distance of 334 light-years and it is currently receding with a heliocentric radial velocity of −30.9 km/s. At its current distance, 51 Cam's brightness is diminished by 0.17 magnitudes due to interstellar extinction and it has an absolute magnitude of +0.92.

References

  1. 1 2 3 4 5 6 7 8 9 10 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. 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. S2CID   17128864.
  3. 1 2 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. 1 2 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. 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 and Astrophysics. 430: 165. arXiv: astro-ph/0409579 . Bibcode:2005A&A...430..165F. doi: 10.1051/0004-6361:20041272 . S2CID   17804304.
  7. 1 2 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. 1 2 3 4 5 6 7 8 9 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. 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. S2CID   54046583.
  10. ↑ "HD 46509". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved July 17, 2023.
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