Astronomy:HD 102839
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Musca[1] |
| Right ascension | 11h 49m 56.61541s[2] |
| Declination | −70° 13′ 32.8408″[2] |
| Apparent magnitude (V) | 4.98[1] |
| Characteristics | |
| Spectral type | G6Ib[3] |
| U−B color index | +1.22[4] |
| B−V color index | +1.40[4] |
| Astrometry | |
| Radial velocity (Rv) | +15.90[5] km/s |
| Proper motion (μ) | RA: −8.113[2][2] mas/yr Dec.: −0.834[2] mas/yr |
| Parallax (π) | 2.1101 ± 0.1063[2] mas |
| Distance | 1,550 ± 80 ly (470 ± 20 pc) |
| Absolute magnitude (MV) | −2.33[1] |
| Details | |
| Mass | 2.3[6] M☉ |
| Radius | 78[2] R☉ |
| Luminosity | 1,593[1] L☉ |
| Surface gravity (log g) | 0.63[6] cgs |
| Temperature | 4,500[7] K |
| Metallicity [Fe/H] | −0.34[6] dex |
| Rotational velocity (v sin i) | 7.6[8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 102839 is a yellow hued supergiant star in the southern constellation of Musca. With an apparent visual magnitude of 4.98,[1] it is faintly visible to the naked eye under good viewing conditions. Based on a parallax of 2.11 mas,[2] it is located at a distance of approximately 1,550 light-years (480 pc) away from Earth. The star is drifting further away with a line of sight velocity component of +16 km/s.[5]
This star has a stellar classification of G6Ib,[3] matching an evolved G-type supergiant star. With 2.3 times the mass of the Sun,[6] it has expanded to 78 times the Sun's radius.[2] It is spinning with a projected rotational velocity of 7.6 km/s.[8] HD 102839 is radiating almost 1,600[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,500 K.[7]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 Hoffleit, D; Warren, W. H (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H 5050. Bibcode: 1995yCat.5050....0H.
- ↑ 4.0 4.1 Mallama, A (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers 42 (2): 443. Bibcode: 2014JAVSO..42..443M.Vizier catalog entry
- ↑ 5.0 5.1 Gontcharov, G. A (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ 6.0 6.1 6.2 6.3 Anders, F. et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics 628: A94. doi:10.1051/0004-6361/201935765. ISSN 0004-6361. Bibcode: 2019A&A...628A..94A.
- ↑ 7.0 7.1 McDonald, I; Zijlstra, A. A; Boyer, M. L (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society 427 (1): 343–357. doi:10.1111/j.1365-2966.2012.21873.x. Bibcode: 2012MNRAS.427..343M. Vizier catalog entry
- ↑ 8.0 8.1 Glebocki, R; Gnacinski, P (2005). "VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005)". VizieR On-line Data Catalog 3244. Bibcode: 2005yCat.3244....0G. Vizier catalog entry
- ↑ "HD 102839". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+102839.
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