अंगिरस तारा vs Dubhe
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| Property | अंगिरस तारा | Dubhe |
|---|---|---|
| पदनाम | 77Eps UMa | 50Alp UMa |
| नक्षत्रमंडल | Ursa Major | Ursa Major |
| वर्णक्रम वर्ग | Class A — A-type (White) | Class F — F-type (Yellow-White) |
| आभासी परिमाण | +1.76 | +1.81 |
| निरपेक्ष परिमाण | -0.26 | -1.07 |
| दूरी | 82.5 ly | 123 ly |
| द्रव्यमान | N/A | N/A |
| त्रिज्या | N/A | N/A |
| तापमान | N/A | N/A |
| दीप्तिमानता | N/A | N/A |
Key Differences
- ◆ Both are the two brightest stars of the Big Dipper in Ursa Major, but they differ in type and motion.
- ◆ Alioth (Epsilon UMa) is an A-type chemically peculiar variable; Dubhe (Alpha UMa) is a K-type giant.
- ◆ Alioth is a member of the Ursa Major Moving Group; Dubhe is not and moves in the opposite direction.
- ◆ Dubhe forms the 'pointer pair' with Merak that indicates Polaris.
- ◆ Alioth is slightly brighter than Dubhe despite the Alpha/Epsilon designations.