Langbahn Team – Weltmeisterschaft

HD 64440

This article is about a Puppis. For A Puppis, see HD 54893.
HD 64440
Location of HD 64440 (circled)
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]
Distance350 ± 30 ly
(108 ± 10 pc)
Absolute magnitude (MV)-1.44[2]
Details[6]
Mass3.86±0.30 M☉
Radius30.75±1.64 R☉
Luminosity405±35 L☉
Surface gravity (log g)2.078±0.178 cgs
Temperature4,670±72 K
Metallicity [Fe/H]−0.048±0.052 dex
Rotational velocity (v sin i)2.3[7] km/s
Other designations
a Puppis, CD−40°3579, FK5 301, GC 10655, HD 64440, HIP 38414, HR 3080, WDS J07522-4035AB
Database references
SIMBADdata

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]

References

  1. ^ 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
  2. ^ 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
  3. ^ 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.
  4. ^ 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
  5. ^ 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.
  6. ^ 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.
  7. ^ 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


Quelle: https://en.wikipedia.org/wiki/HD_64440