الدبران (نجم) vs السماك الرامح
| الخاصية | الدبران (نجم) | السماك الرامح |
|---|---|---|
| التسمية | 87Alp Tau | 16Alp Boo |
| الكوكبة | Taurus | N/A |
| النوع الطيفي | Class K — K-type (Orange) | Class K — K-type (Orange) |
| القدر الظاهري | +0.87 | -0.05 |
| القدر المطلق | -0,68 | -0,31 |
| المسافة | 66.6 ly | 36.7 ly |
| الكتلة | N/A | N/A |
| نصف القطر | N/A | N/A |
| درجة الحرارة | N/A | N/A |
| السطوع | N/A | N/A |
الاختلافات الرئيسية
- ◆ 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.