HD 64440, also known as a Puppis, is a spectroscopic binary[3] star in the constellation Puppis. Its apparent magnitude is 3.71.[2] Located around 108 parsecs (350 ly) distant,[1] the primary is a bright giant of spectral type K1.5II and the secondary is an early A-type star. They orbit with a period just under 7 years and eccentricity 0.38.[3]
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 52m 13.03173s[1] |
| Declination | −40° 34′ 32.8318″[1] |
| Apparent magnitude (V) | 3.71[2] |
| Characteristics | |
| Spectral type | K1II+A0.5[3] |
| U−B color index | +0.75[4] |
| B−V color index | +1.05[4] |
| Astrometry | |
| Radial velocity (Rv) | +24.00[5] km/s |
| Proper motion (μ) | RA: -18.00[1] mas/yr Dec.: +5.01[1] mas/yr |
| Parallax (π) | 9.25 ± 0.83 mas[1] |
| Distance | 350 ± 30 ly (108 ± 10 pc) |
| Absolute magnitude (MV) | -1.44[2] |
| Details[6] | |
| Mass | 3.86±0.30 M☉ |
| Radius | 30.75±1.64 R☉ |
| Luminosity | 405±35 L☉ |
| Surface gravity (log g) | 2.078±0.178 cgs |
| Temperature | 4,670±72 K |
| Metallicity [Fe/H] | −0.048±0.052 dex |
| Rotational velocity (v sin i) | 2.3[7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
edit- ^ a b c d e f 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. Vizier catalog entry
- ^ a b c 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. Vizier catalog entry
- ^ a b c Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.
- ^ a b 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
- ^ Wilson, R. E. (1953). "General Catalogue of Stellar Radial Velocities". Carnegie Institute Washington D.C. Publication. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. LCCN 54001336.
- ^ Ottoni, G.; Udry, S.; Ségransan, D.; Buldgen, G.; Lovis, C.; Eggenberger, P.; Pezzotti, C.; Adibekyan, V.; Marmier, M.; Mayor, M.; Santos, N. C.; Sousa, S. G.; Lagarde, N.; Charbonnel, C. (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. arXiv:2201.01528. Bibcode:2022A&A...657A..87O. doi:10.1051/0004-6361/202040078. ISSN 0004-6361. a Puppis' database entry at VizieR.
- ^ 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. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. S2CID 54046583. Vizier catalog entry
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