Astronomy:HD 94510
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Equinox J2000.0]] (ICRS)
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! style="text-align:left" | Constellation
| Carina
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|- style="vertical-align:top" ! style="text-align:left" | Right ascension | 10h 53m 29.65524s[1] |- style="vertical-align:top" ! style="text-align:left" | Declination | −58° 51′ 11.4163″[1] |- style="vertical-align:top" ! style="text-align:left" | Apparent magnitude (V) | +3.78[2] (3.75–3.80)[3]
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|- style="vertical-align:top" ! style="text-align:left" | Evolutionary stage | subgiant[4] |- style="vertical-align:top" ! style="text-align:left" | Spectral type | K0IV[5] |- style="vertical-align:top"
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|- style="vertical-align:top" ! style="text-align:left" | B−V color index | +0.945±0.005[2] |- style="vertical-align:top"
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|- style="vertical-align:top" ! style="text-align:left" | Variable type | suspected |- style="vertical-align:top"
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AstrometryRadial velocity (Rv)+8.10±0.70[2] km/sProper motion (μ) RA: +79.01±0.13[1] mas/yr
Dec.: +38.47±0.12[1] mas/yr Parallax (π)34.33 ± 0.13[1] masDistance95.0 ± 0.4 ly
(29.1 ± 0.1 pc)Absolute magnitude (MV)1.46[2]
DetailsMass1.60[4] M☉Radius7.55+0.93
−0.12[6] R☉Luminosity30.96±0.27[6] L☉Surface gravity (log g)3.00[7] cgsTemperature4,955+41
−80[6] KMetallicity [Fe/H]−0.13[2] dex
Other designations
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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] stage with a stellar classification of K0IV,[5] 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 1.60[4] times the mass of the Sun and has expanded to nearly eight[6] times the Sun's radius. The star is radiating 31 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,955 K.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Samus, N. N. et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1 61 (1): 80–88, doi:10.1134/S1063772917010085, Bibcode: 2017ARep...61...80S.
- ↑ 4.0 4.1 4.2 4.3 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.
- ↑ 5.0 5.1 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, doi:10.1086/504637, Bibcode: 2006AJ....132..161G.
- ↑ 6.0 6.1 6.2 6.3 6.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ Alves, S. et al. (April 2015), "Determination of the spectroscopic stellar parameters for 257 field giant stars", Monthly Notices of the Royal Astronomical Society 448 (3): 2749–2765, doi:10.1093/mnras/stv189, Bibcode: 2015MNRAS.448.2749A.
- ↑ "HD 94510". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+94510.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
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