Astronomy:HD 94510
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas |
| 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 | |
| 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
- ↑ 1.0 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 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 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 "Michigan catalogue for the HD stars, vol. 1 (Houk+, 1975)". https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=III/31&HD=94510.
- ↑ 7.0 7.1 Ottoni, G.; Udry, S.; Ségransan, D.; Buldgen, G.; Lovis, C.; Eggenberger, P.; Pezzotti, C.; Adibekyan, V. et al. (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. doi:10.1051/0004-6361/202040078. ISSN 0004-6361. Bibcode: 2022A&A...657A..87O. u Carinae' database entry at VizieR.
- ↑ "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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