Astronomy:HD 69142
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Short description: Star in the constellation Puppis
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Puppis |
| Right ascension | 08h 14m 02.92219s[1] |
| Declination | −40° 20′ 52.4031″[1] |
| Apparent magnitude (V) | 4.44[2] |
| Characteristics | |
| Spectral type | K1II-III[3] |
| U−B color index | +1.09[2] |
| B−V color index | +1.17[2] |
| Astrometry | |
| Radial velocity (Rv) | +13.50[4] km/s |
| Proper motion (μ) | RA: +45.51[1] mas/yr Dec.: -65.60[1] mas/yr |
| Parallax (π) | 10.93 ± 0.48[1] mas |
| Distance | 300 ± 10 ly (91 ± 4 pc) |
| Absolute magnitude (MV) | -0.38[5] |
| Orbit[6] | |
| Primary | h2 Puppis Aa |
| Companion | h2 Puppis Ab |
| Period (P) | 930 days |
| Semi-major axis (a) | 10.66 mas |
| Eccentricity (e) | 0.4 |
| Inclination (i) | 135.2° |
| Longitude of the node (Ω) | 181.7° |
| Periastron epoch (T) | 2418060 |
| Argument of periastron (ω) (secondary) | 140° |
| Details | |
| Mass | 1.79[7] M☉ |
| Radius | 23[7] R☉ |
| Luminosity | 207[5] L☉ |
| Surface gravity (log g) | 1.97[7] cgs |
| Temperature | 4,467[7] K |
| Rotational velocity (v sin i) | < 1.0[8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 69142 is a class K1II-III[3] (orange bright giant) star in the constellation Puppis. Its apparent magnitude is 4.44[2] and it is approximately 298 light years away based on parallax.[1]
It is a multiple star; the primary is a spectroscopic binary with a 2.55 year orbit with eccentricity 0.4,[9] and there is a more distant companion B at 59.4" and 9.5 magnitude.[10]
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. Vizier catalog entry
- ↑ 2.0 2.1 2.2 2.3 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237. Bibcode: 2002yCat.2237....0D.
- ↑ 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.
- ↑ Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication (Carnegie Institution for Science). Bibcode: 1953GCRV..C......0W.
- ↑ 5.0 5.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. Vizier catalog entry
- ↑ Jancart, S. (2005). "Astrometric orbits of SB9 stars". Astronomy and Astrophysics 442 (1): 365–380. doi:10.1051/0004-6361:20053003. Bibcode: 2005A&A...442..365J.
- ↑ 7.0 7.1 7.2 7.3 Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics 352: 555–562. Bibcode: 1999A&A...352..555A. Vizier catalog entry
- ↑ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics 561: A126. doi:10.1051/0004-6361/201220762. Bibcode: 2014A&A...561A.126D. Vizier catalog entry
- ↑ Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics 546: A69. doi:10.1051/0004-6361/201219774. Bibcode: 2012A&A...546A..69M. Vizier catalog entry
- ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal 122 (6): 3466. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M. Vizier catalog entry
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