आर्द्रा तारा vs Mira
Four magnitudes and more separate the pair overhead, +0.45 for आर्द्रा तारा and +6.47 for Mira. Corrected for distance, आर्द्रा तारा outproduces Mira by some 711 times, absolute magnitudes −5.47 and +1.66. Mira is an M-type star, while आर्द्रा तारा is an M-type star in Orion.
Property comparison
| 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 |
Full data for each star: आर्द्रा तारा · Mira
Key differences
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.