Canopus

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Canopus
Canopus.jpg
An image o Canopus bi Expedition 6
Observation data
Epoch J2000      Equinox J2000
Constellation Carina
Pronunciation /kəˈnpəs/
Richt ascension 06h 23m 57.1099s[1]
Declination −52° 41′ 44.378″
Apparent magnitude (V) −0.72
Characteristics
Spectral teep A9 II[2][3]
U−B colour index 0.04
B−V colour index 0.15
Variable teep None
Astrometry
Radial velocity (Rv) 20.5[1] km/s
Proper motion (μ) RA: 19.99 [1] mas/yr
Dec.: 23.67 [1] mas/yr
Parallax (π) 10.43 ± 0.53[1] mas
Distance 310 ± 20 ly
(96 ± 5 pc)
Absolute magnitude (MV) –5.53
Details
Mass 9.0–10.6[4] M
Radius 71.4 ± 4.0[5] R
Luminosity 15,100[4] L
Surface gravity (log g) 2.10[4] cgs
Temperatur 7,350[6] K
Metallicity [Fe/H] –0.07[4] dex
Rotational velocity (v sin i) 8.0[4] km/s
Ither designations
Suhel, Suhail, Suhayl, Alpha Carinae, CD−52°914, FK5 245, GC 8302, HD 45348, HIP 30438, HR 2326, SAO 234480
Database references
SIMBAD data

Canopus (/kəˈnpəs/; α Car, α Carinae, Alpha Carinae) is the brichtest starn in the soothren constellation o Carina, an the seicont brichtest starn in the nicht-time sky, efter Sirius. Canopus's visual magnitude is −0.72, an it haes an absolute magnitude o −5.53.

Canopus is a supergiant o spectral type F. Canopus is essentially white when seen wi the naked ee (altho F-type starns are sometimes leetit as "yellaeish-white"). It is locatit in the far soothren sky, at a declination o −52° 42' (2000) an a richt ascension o 06h24.0m.[1]

References[eedit | eedit soorce]

  1. 1.0 1.1 1.2 1.3 1.4 1.5 "Database entry for Canopus". SIMBAD, Centre de Données astronomiques de Strasbourg. Retrieved 8 Julie 2012. 
  2. Gray, R. O.; Garrison, R. F. (1989). "The early F-type stars - Refined classification, confrontation with Stromgren photometry, and the effects of rotation". Astrophysical Journal Supplement Series (ISSN 0067-0049). 69: 301. Bibcode:1989ApJS...69..301G. doi:10.1086/191315. 
  3. Lopez-Cruz, O.; Garrison, R. F. (1993). "A Spectroscopic Study of High Galactic Latitude F Supergiant Stars". Luminous High-Latitude Stars. the International Workshop on Luminous High-Latitude Stars. 45: 59. Bibcode:1993ASPC...45...59L. 
  4. 4.0 4.1 4.2 4.3 4.4 Smiljanic, R.; et al. (2006), "CNO in evolved intermediate mass stars", Astronomy and Astrophysics, 449 (2): 655–671, arXiv:astro-ph/0511329, Bibcode:2006A&A...449..655S, doi:10.1051/0004-6361:20054377.  Unknown parameter |month= ignored (help)
  5. Domiciano De Souza, A.; Bendjoya, P.; Vakili, F.; Millour, F.; Petrov, R. G. (2008). "Diameter and photospheric structures of Canopus from AMBER/VLTI interferometry". Astronomy and Astrophysics. 489 (2): L5–L8. Bibcode:2008A&A...489L...5D. doi:10.1051/0004-6361:200810450. 
  6. Desikachary K, Hearnshaw JB (1982). "The spectrum of Canopus. II - Analysis and composition". Royal Astronomical Society, Monthly Notices (PDF). 201: 707–21. Bibcode:1982MNRAS.201..707D.