نجم السهم vs Rigil Kentaurus
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| Property | نجم السهم | Rigil Kentaurus |
|---|---|---|
| التسمية | N/A | Alp1Cen |
| الكوكبة | N/A | Centaurus |
| النوع الطيفي | N/A | Class G — G-type (Yellow) |
| القدر الظاهري | +9.54 | -0.01 |
| القدر المطلق | 13.24 | 4.38 |
| المسافة | 6.0 ly | 4.3 ly |
| الكتلة | N/A | N/A |
| نصف القطر | N/A | N/A |
| درجة الحرارة | N/A | N/A |
| السطوع | N/A | N/A |
Key Differences
- ◆ Both are among the very closest stars to the Sun, though radically different in character.
- ◆ Rigil Kentaurus (Alpha Cen A) is a G-type solar twin at 4.37 ly; Barnard's Star is an M-type red dwarf at 5.96 ly.
- ◆ Barnard's Star has the largest proper motion in the sky (10.3 arcsec/yr); Rigil Kentaurus also has significant proper motion.
- ◆ Rigil Kentaurus is far brighter and more massive than Barnard's Star.
- ◆ Barnard's Star is the second-closest star system; Alpha Centauri (including Proxima) is the closest.