ดาวแอลกอล vs Mira
Four magnitudes and more separate the pair overhead, +2.09 for ดาวแอลกอล and +6.47 for Mira. Set side by side at equal distance the ranking changes — absolute magnitudes of −0.11 and +1.66 leave ดาวแอลกอล roughly 5.1 times the more luminous. Only 89.9 light-years separate the Sun from ดาวแอลกอล; Mira sits 3.3 times further out at 299.
Property comparison
| Property | ดาวแอลกอล | Mira |
|---|---|---|
| ชื่อเรียก | 26Bet Per | 68Omi Cet |
| กลุ่มดาว | Perseus | N/A |
| ประเภทสเปกตรัม | Class B — B-type (Blue-White) | Class M — M-type (Red) |
| โชติมาตรปรากฏ | +2.09 | +6.47 |
| โชติมาตรสัมบูรณ์ | -0.11 | 1.66 |
| ระยะทาง | 89.9 ly | 299 ly |
| มวล | N/A | N/A |
| รัศมี | N/A | N/A |
| อุณหภูมิ | N/A | N/A |
| ความส่องสว่าง | N/A | N/A |
Full data for each star: ดาวแอลกอล · Mira
Key differences
Key Differences
- ◆ Both are famous variable stars but of completely different types.
- ◆ Algol is an eclipsing binary — it dims when its fainter companion passes in front; Mira is a pulsating long-period variable.
- ◆ Algol varies every 2.87 days; Mira has a pulsation period of ~332 days.
- ◆ Mira is a red giant that sheds material, leaving a 13-light-year tail; Algol is a B-type star system.
- ◆ Algol was probably the first eclipsing variable to be recognized by ancient observers.