HD 94510

Last updated
HD 94510
Observation data
Epoch J2000       Equinox J2000
Constellation Carina
Right ascension 10h 53m 29.65524s [1]
Declination −58° 51′ 11.4163″ [1]
Apparent magnitude  (V)+3.78 [2] (3.75–3.80) [3]
Characteristics
Evolutionary stage subgiant [4]
Spectral type K0IV [5] or K1III [6]
B−V color index +0.945±0.005 [2]
Variable type suspected
Astrometry
Radial velocity (Rv)+8.10±0.70 [2]  km/s
Proper motion (μ)RA: +79.01±0.13 [1]   mas/yr
Dec.: +38.47±0.12 [1]   mas/yr
Parallax (π)34.33 ± 0.13  mas [1]
Distance 95.0 ± 0.4  ly
(29.1 ± 0.1  pc)
Absolute magnitude  (MV)1.46 [2]
Details [7]
Mass 1.90±0.06  M☉
Radius 6.90±0.10  R☉
Luminosity 26.85±0.55  L☉
Surface gravity (log g)3.020±0.069  cgs
Temperature 5,006±25  K
Metallicity [Fe/H]−0.07±0.06  dex
Other designations
u Car, NSV  5011, CPD−58°2834, GC  14980, HD  94510, HIP  53253, HR  4257, SAO  238574, CCDM J10535-5851 [8]
Database references
SIMBAD data

HD 94510 is a single [9] star in the southern constellation of Carina, positioned near the northern constellation border with Vela. It has the Bayer designation u Carinae; HD 94520 is the identifier from the Henry Draper Catalogue . This object has an orange hue and is visible to the naked eye with an apparent visual magnitude that fluctuates around +3.78. [2] The star is located at a distance of 95  light-years from the Sun based on parallax, [1] and is drifting further away with a radial velocity of +8 km/s. [2]

This is a K-type star in the subgiant [4] or giant [6] stage with a stellar classification of K0IV, [5] or K1III [6] which indicates it has exhausted the supply of hydrogen at its core and is evolving into a giant. HD 94510 is a suspected variable star with a brightness that has been measured varying from magnitude 3.75 down to 3.80. [3] It has an estimated 1.90 times the mass of the Sun and has expanded to 6.9 times the Sun's radius. The star is radiating 27 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,006  K . [7]

References

  1. 1 2 3 4 5 6 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID   18759600.
  2. 1 2 3 4 5 6 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv: 1108.4971 , Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID   119257644.
  3. 1 2 Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID   125853869.
  4. 1 2 Edvardsson, B. (January 1988), "Spectroscopic surface gravities and chemical compositions for 8 nearby single sub-giants.", Astronomy and Astrophysics, 190: 148–166, Bibcode:1988A&A...190..148E.
  5. 1 2 Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal , 132 (1): 161–170, arXiv: astro-ph/0603770 , Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID   119476992.
  6. 1 2 3 "Michigan catalogue for the HD stars, vol. 1 (Houk+, 1975)". VizieR . Retrieved 2025-02-15.
  7. 1 2 Ottoni, G.; Udry, S.; Ségransan, D.; Buldgen, G.; Lovis, C.; Eggenberger, P.; Pezzotti, C.; Adibekyan, V.; Marmier, M.; Mayor, M.; Santos, N. C.; Sousa, S. G.; Lagarde, N.; Charbonnel, C. (2022-01-01). "CORALIE radial-velocity search for companions around evolved stars (CASCADES). I. Sample definition and first results: Three new planets orbiting giant stars". Astronomy and Astrophysics. 657: A87. arXiv: 2201.01528 . Bibcode:2022A&A...657A..87O. doi:10.1051/0004-6361/202040078. ISSN   0004-6361. u Carinae' database entry at VizieR.
  8. ↑ "HD 94510". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2018-07-10.
  9. ↑ Eggleton, P. P.; Tokovinin, A. A. (2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869, arXiv: 0806.2878 , Bibcode:2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x , S2CID   14878976.
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