पोलारिस vs अभिजित् तारा
| गुण | पोलारिस | अभिजित् तारा |
|---|---|---|
| पदनाम | 1Alp UMi | 3Alp Lyr |
| नक्षत्रमंडल | N/A | Lyra |
| वर्णक्रम वर्ग | Class F — F-type (Yellow-White) | Class A — A-type (White) |
| आभासी परिमाण | +1.97 | +0.03 |
| निरपेक्ष परिमाण | -3.64 | 0.60 |
| दूरी | 433 ly | 25.0 ly |
| द्रव्यमान | N/A | N/A |
| त्रिज्या | N/A | N/A |
| तापमान | N/A | N/A |
| दीप्तिमानता | N/A | N/A |
मुख्य अंतर
- ◆ Polaris is an F-type Cepheid variable supergiant; Vega is a stable A-type main-sequence star.
- ◆ Polaris is 431 light-years away; Vega is much closer at 25 light-years.
- ◆ Polaris sits near the north celestial pole and has guided navigators for centuries; Vega was the pole star ~14,000 years ago.
- ◆ Vega served as the original zero-magnitude reference for the photometric system.
- ◆ Polaris pulsates in brightness; Vega has a debris disk suggesting a forming planetary system.