السلبار vs النسر الطائر

Property السلبار النسر الطائر
التسمية Alp Eri 53Alp Aql
الكوكبة N/A Aquila
النوع الطيفي Class B — B-type (Blue-White) Class A — A-type (White)
القدر الظاهري +0.45 +0.76
القدر المطلق -2.70 2.21
المسافة 139 ly 16.7 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 among the most rapidly rotating known stars and are significantly oblate as a result.
  • Altair rotates in ~10.4 hours and has been directly imaged to confirm its flattened disk-like shape.
  • Achernar's equatorial diameter is 56% wider than its poles — the most flattened bright star known.
  • Altair is an A-type star; Achernar is a hotter B-type star.
  • Altair is very close at 16.7 light-years; Achernar is 139 light-years away.

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