Canopus
Frae Wikipedia
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Carina |
| Pronunciation | /kəˈnoʊpəs/ |
| Richt ascension | 06h 23m 57.1099s[1] |
| Declination | −52° 41′ 44.378″ |
| Apparent magnitude (V) | −0.72 |
| Characteristics | |
| Spectral type | F0 II or F0 Ib[2] |
| U−B colour index | 0.04 |
| B−V colour index | 0.15 |
| Variable type | 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[3] M☉ |
| Radius | 71.4 ± 4.0[2] R☉ |
| Luminosity | 15,100[3] L☉ |
| Surface gravity (log g) | 2.10[3] |
| Temperatur | 7,350[4] K |
| Metallicity [Fe/H] | –0.07[3] dex |
| Rotational velocity (v sin i) | 8.0[3] km/s |
| Ither designations | |
| Database references | |
| SIMBAD | data |
Canopus (/kəˈnoʊpəs/; 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]
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "Database entry for Canopus". SIMBAD, Centre de Données astronomiques de Strasbourg. Retrieved 8 July 2012.
- ↑ 2.0 2.1 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.
- ↑ 3.0 3.1 3.2 3.3 3.4 Smiljanic, R. et al. (April 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.
- ↑ 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.
