| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 10 53 29.65524 |
| Declination | −58° 51′ 11.4163″ |
| Apparent magnitude (V) | +3.78 (3.75–3.80) |
| Characteristics | |
| Evolutionary stage | subgiant |
| Spectral type | K0IV |
| B−V color index | +0.945±0.005 |
| Variable type | suspected |
| Astrometry | |
| Radial velocity (Rv) | +8.10±0.70 km/s |
| Proper motion (μ) | RA: +79.01±0.13 mas/yr Dec.: +38.47±0.12 mas/yr |
| Parallax (π) | 34.33 ± 0.13 mas |
| Distance | 95.0 ± 0.4 ly (29.1 ± 0.1 pc) |
| Absolute magnitude (MV) | 1.46 |
| Details | |
| Mass | 1.60 M☉ |
| Radius | 7.55+0.93 −0.12 R☉ |
| Luminosity | 30.96±0.27 L☉ |
| Surface gravity (log g) | 3.00 cgs |
| Temperature | 4,955+41 −80 K |
| Metallicity | −0.13 dex |
| Other designations | |
| u Car, NSV 5011, CPD−58°2834, GC 14980, HD 94510, HIP 53253, HR 4257, SAO 238574, CCDM J10535-5851 | |
| Database references | |
| SIMBAD | data |
HD 94510 is a single 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. The star is located at a distance of 95 light-years from the Sun based on parallax, and is drifting further away with a radial velocity of +8 km/s.
This is a K-type star in the subgiant stage with a stellar classification of K0IV, 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. It has an estimated 1.60 times the mass of the Sun and has expanded to nearly eight 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.
References
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. 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, arXiv:1503.02556, Bibcode:2015MNRAS.448.2749A, doi:10.1093/mnras/stv189.
- "HD 94510". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-10.
- 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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