السماك الرامح vs رأس التوأم المؤخر
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| Property | السماك الرامح | رأس التوأم المؤخر |
|---|---|---|
| التسمية | 16Alp Boo | 78Bet Gem |
| الكوكبة | N/A | Gemini |
| النوع الطيفي | Class K — K-type (Orange) | Class K — K-type (Orange) |
| القدر الظاهري | -0.05 | +1.16 |
| القدر المطلق | -0.31 | 1.08 |
| المسافة | 36.7 ly | 33.8 ly |
| الكتلة | N/A | N/A |
| نصف القطر | N/A | N/A |
| درجة الحرارة | N/A | N/A |
| السطوع | N/A | N/A |
Key Differences
- ◆ Both are K-type giant stars, but Arcturus is in the northern hemisphere's highlight and Pollux is in Gemini.
- ◆ Arcturus is the brightest star in the northern sky at magnitude −0.05; Pollux is the nearest giant star at ~34 ly.
- ◆ Pollux hosts a confirmed exoplanet (Thestias); Arcturus has no known planetary companions.
- ◆ Arcturus has an unusually high proper motion suggesting an unusual galactic orbit.
- ◆ Arcturus is about 170 times more luminous than the Sun; Pollux is about 33 times more luminous.