Back Sirius AF الشعرى اليمانية Arabic شعرى يمانيه ARZ Sirius AST Рукьал (цӀва) AV Sirius AZ کروان قیران AZB Сириус BA Сірыус BE Сириус Bulgarian
 Posisi Sirius. | |
| Dhata pangamatan Epos J2000 | |
|---|---|
| Rasi lintang | Canis Major |
| Asensio rekta | 06j 45m 08.9173d |
| Dhéklinasi | −16° 42' 58.017" |
| Magnitudo katon (V) | −1.47 (A) / 8.44 (B) |
| Ciri-ciri | |
| Kelas spektrum | A1V (A) / DA2 (B) |
| Indèks warna U-B | −0.08 (A) / −1.04 (B) |
| Indèks warna B-V | 0.01 (A) / −0.03 (B) |
| Jinis variabel | Bintang ganda gerhana |
| Astrometri | |
| Kacepetan radhial (Rv) | −7.6 km/s |
| Gerak dhiri (μ) | RA: −546.01 mas/taun Dek.: −1223.08 mas/taun |
| Paralaks (π) | 379.21 ± 1.58 mas |
| Let | 8.6 ± 0.04 tc (2.64 ± 0.01 pc) |
| Magnitudo mutlak (MV) | 1.47 (A) / 11.35 (B) |
| Orbit lintang gandha visual | |
| Lintang sékundhèr | α CMa B[1] |
| Periodhe (P) | 50.09 taun |
| Sumbu semi-mayor (a) | 7.56" |
| Eksentrisitas (e) | 0.5923 |
| Inklinasi (i) | 136.5° |
| Bujur node (Ω) | 44.6° |
| Epoch periastron (T) | 1894.13 |
| Detail | |
| Massa | 2.02[2] (A) / 0.978[2] (B) M☉ |
| Radhius | 1.711[2] (A) / 0.008 (B) R☉ |
| Luminositas | 25.4[2] (A) / 0.0024 (B) L☉ |
| Suhu | 9,900 (A) / 25,200[2] (B) K |
| Metalisitas | 190% Matahari (A) |
| Umur | 2-3 × 108[2] taun |
| Pamènèhan jeneng liya | |
| Réferènsi database | |
| SIMBAD | data
|
Sirius (α CMa / α Canis Majoris / Alpha Canis Majoris) ya iku lintang paling padang ing langit wengi, nganggo magnitudo tampak −1.47. Lintang iki mapan ing rasi Canis Major lan minangka sistem lintang ganda kanthi piranti primèr lintang deret utama kelas A lan piranti sekunder siji katai putih.
- ↑ G. D. Gatewood, C. V. Gatewood (1978). "A study of Sirius". Astrophysical Journal. 225: 191–197.
- ↑ a b c d e f J. Liebert, P. A. Young, D. Arnett, J. B. Holberg, K. A. Williams (2005). "The Age and Progenitor Mass of Sirius B". The Astrophysical Journal. 630 (1): L69–L72.
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