ดาวคาโนปัส vs ดาวไรเจล
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| Property | ดาวคาโนปัส | ดาวไรเจล |
|---|---|---|
| ชื่อเรียก | Alp Car | 19Bet Ori |
| กลุ่มดาว | N/A | Orion |
| ประเภทสเปกตรัม | Class F — F-type (Yellow-White) | Class B — B-type (Blue-White) |
| โชติมาตรปรากฏ | -0.62 | +0.18 |
| โชติมาตรสัมบูรณ์ | -5.50 | -6.93 |
| ระยะทาง | 309 ly | 863 ly |
| มวล | N/A | N/A |
| รัศมี | N/A | N/A |
| อุณหภูมิ | N/A | N/A |
| ความส่องสว่าง | N/A | N/A |
Key Differences
- ◆ Canopus is an F-type bright giant; Rigel is a B-type blue supergiant — they differ greatly in spectral type.
- ◆ Both are extremely luminous: Canopus ~10,700 L☉ and Rigel ~120,000 L☉.
- ◆ Canopus is used for spacecraft navigation; Rigel is a landmark star in Orion.
- ◆ Rigel is hotter at ~12,100 K versus Canopus at ~7,400 K.
- ◆ Canopus is the second-brightest star in the sky; Rigel is the seventh-brightest.