Бетельгейзе vs Mira
Four magnitudes and more separate the pair overhead, +0.45 for Бетельгейзе and +6.47 for Mira. Corrected for distance, Бетельгейзе outproduces Mira by some 711 times, absolute magnitudes −5.47 and +1.66. Mira is an M-type star, while Бетельгейзе is an M-type star in Orion.
Property comparison
| Property | Бетельгейзе | Mira |
|---|---|---|
| Обозначение | 58Alp Ori | 68Omi Cet |
| Созвездие | Orion | N/A |
| Спектральный класс | Class M — M-type (Red) | Class M — M-type (Red) |
| Видимая звёздная величина | +0.45 | +6.47 |
| Абсолютная звёздная величина | -5.47 | 1.66 |
| Расстояние | 498 ly | 299 ly |
| Масса | N/A | N/A |
| Радиус | N/A | N/A |
| Температура | N/A | N/A |
| Светимость | N/A | N/A |
Full data for each star: Бетельгейзе · 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.