आर्द्रा तारा vs Mira

Property आर्द्रा तारा Mira
पदनाम 58Alp Ori 68Omi Cet
नक्षत्रमंडल Orion N/A
वर्णक्रम वर्ग Class M — M-type (Red) Class M — M-type (Red)
आभासी परिमाण +0.45 +6.47
निरपेक्ष परिमाण -5.47 1.66
दूरी 498 ly 299 ly
द्रव्यमान N/A N/A
त्रिज्या N/A N/A
तापमान N/A N/A
दीप्तिमानता N/A N/A

Key Differences

  • ◆ Both are famous variable red giants/supergiants of spectral type M, but at very different evolutionary stages.
  • ◆ Mira is a low-mass AGB star on its final evolutionary phase before becoming a planetary nebula; Betelgeuse is a massive red supergiant heading for a supernova.
  • ◆ Mira has a pulsation period of ~332 days with an enormous magnitude range; Betelgeuse shows semi-regular variability.
  • ◆ Betelgeuse is vastly larger at ~887 R☉ versus Mira's ~332 R☉.
  • ◆ Mira has a remarkable 13-light-year tail of shed material trailing behind it through the interstellar medium.

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