Procyon

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Procyon
Position Alpha Cmi.png
The poseetion o Procyon
Observation data
Epoch J2000      Equinox J2000
Constellation Canis Minor
Richt ascension 07h 39m 18.11950s[1]
Declination +05° 13′ 29.9552″[1]
Apparent magnitude (V) 0.34[2] (A) / 10.7[3] (B)
Chairactereestics
Spectral type F5 IV–V[2] + DQZ[4]
U−B colour index +0.00[5]
B−V colour index +0.42[5]
Variable teep suspected[6] (A)
Astrometry
Radial velocity (Rv)−3.2[7] km/s
Proper motion (μ) RA: −714.590[1] mas/yr
Dec.: −1036.80[1] mas/yr
Parallax (π)284.56 ± 1.26[1] mas
Distance11.46 ± 0.05 ly
(3.51 ± 0.02 pc)
Absolute magnitude (MV)2.66/13.0[3]
Details
Procyon A
Mass1.499±0.031[8] M
Radius2.048±0.025[2] R
Luminosity6.93[2] L
Surface gravity (log g)3.96[2] cgs
Temperatur6,530±50[2] K
Metallicity [Fe/H]−0.05±0.03[2] dex
Rotation23 days[9]
Rotational velocity (v sin i)3.16±0.50[2] km/s
Age1.87±0.13[8] Gyr
Procyon B
Mass0.602±0.015[4] M
Radius0.01234±0.00032[4] R
Luminosity0.00049[10] L
Surface gravity (log g)8.0[4] cgs
Temperatur7,740±50[4] K
Age1.37[10] Gyr
Orbit[11]
CompanionProcyon B
Period (P)40.82 yr
Semi-major axis (a)4.3″
Eccentricity (e)0.407
Inclination (i)31.1°
Longitude o the node (Ω)97.3°
Periastron epoch (T)1967.97
Argument o periastron (ω)
(seicontar)
92.2°
Ither designations
Elgomaisa, Algomeysa, Antecanis, α Canis Minoris, 10 Canis Minoris, GCTP 1805.00, HR 2943, BD+05°1739, HD 61421, LHS 233, GJ 280, HIP 37279, SAO 115756.[12]
Database references
SIMBADThe system
A
B

Procyon, an aw designatit Alpha Canis Minoris (α Canis Minoris, abbreviatit Alpha CMi, α CMi), is the brichtest starn in the constellation o Canis Minor.

References[eedit | eedit soorce]

  1. 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357 
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Kervella, P.; et al. (January 2004), "The diameter and evolutionary state of Procyon A. Multi-technique modeling using asteroseismic and interferometric constraints", Astronomy and Astrophysics, 413 (1): 251–256, arXiv:astro-ph/0309148Freely accessible, Bibcode:2004A&A...413..251K, doi:10.1051/0004-6361:20031527 
  3. 3.0 3.1 Schroeder, Daniel J.; Golimowski, David A.; Brukardt, Ryan A.; Burrows, Christopher J.; Caldwell, John J.; Fastie, William G.; Ford, Holland C.; Hesman, Brigette; Kletskin, Ilona; Krist, John E.; Royle, Patricia; Zubrowski, Richard. A. (February 2000), "A Search for Faint Companions to Nearby Stars Using the Wide Field Planetary Camera 2", The Astronomical Journal, 119 (2): 906–922, Bibcode:2000aj....119..906s, doi:10.1086/301227 
  4. 4.0 4.1 4.2 4.3 4.4 Provencal, J. L.; et al. (2002), "Procyon B: Outside the Iron Box", The Astrophysical Journal, 568 (1): 324–334, Bibcode:2002ApJ...568..324P, doi:10.1086/338769 
  5. 5.0 5.1 Mermilliod, J.-C (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M. 
  6. Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007–2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1: 02025. Bibcode:2009yCat....102025S. 
  7. Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Washington. Bibcode:1953GCRV..C......0W. 
  8. 8.0 8.1 Liebert, James; et al. (May 2013), "The Age and Stellar Parameters of the Procyon Binary System", The Astrophysical Journal, 769 (1): 10, arXiv:1305.0587Freely accessible, Bibcode:2013ApJ...769....7L, doi:10.1088/0004-637X/769/1/7, 7 
  9. Koncewicz, R.; Jordan, C. (January 2007), "OI line emission in cool stars: calculations using partial redistribution", Monthly Notices of the Royal Astronomical Society, 374 (1): 220–231, Bibcode:2007MNRAS.374..220K, doi:10.1111/j.1365-2966.2006.11130.x 
  10. 10.0 10.1 Giammichele, N.; Bergeron, P.; Dufour, P. (April 2012), "Know Your Neighborhood: A Detailed Model Atmosphere Analysis of Nearby White Dwarfs", The Astrophysical Journal Supplement, 199 (2): 29, arXiv:1202.5581Freely accessible, Bibcode:2012ApJS..199...29G, doi:10.1088/0067-0049/199/2/29  Age is for the white dwarf stage.
  11. Girard, T. M.; et al. (May 2000), "A Redetermination of the Mass of Procyon", The Astronomical Journal, 119 (5): 2428–2436, Bibcode:2000AJ....119.2428G, doi:10.1086/301353 
  12. "PROCYON AB -- Spectroscopic binary", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2011-11-23 

Coordinates: Sky map 07h 39m 18.1s, +05° 13′ 29″