アルデバラン vs アークトゥルス
| 特性 | アルデバラン | アークトゥルス |
|---|---|---|
| 名称 | 87Alp Tau | 16Alp Boo |
| 星座 | Taurus | N/A |
| スペクトル型 | Class K — K-type (Orange) | Class K — K-type (Orange) |
| 見かけの等級 | +0.87 | -0.05 |
| 絶対等級 | -0.68 | -0.31 |
| 距離 | 66.6 ly | 36.7 ly |
| 質量 | N/A | N/A |
| 半径 | N/A | N/A |
| 温度 | N/A | N/A |
| 光度 | N/A | N/A |
主な違い
- ◆ Both are orange K-type giants that have evolved off the main sequence.
- ◆ Arcturus is the brightest star in the northern celestial hemisphere at magnitude −0.05.
- ◆ Aldebaran is larger at ~44 R☉ versus Arcturus at ~25 R☉.
- ◆ Arcturus is much closer at 36.7 light-years; Aldebaran is about 65 light-years away.
- ◆ Arcturus has an unusually high proper motion and may be a remnant of a disrupted dwarf galaxy.