S Orionis
S Orionis is an asymptotic giant branch star in the constellation Orion, approximately 480 parsecs (1,600 ly) away. It varies regularly in brightness between extremes of magnitude 7.2 and 14 every 14 months.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 29m 00.8948s |
| Declination | −04° 41′ 32.748″ |
| Apparent magnitude (V) | 7.2 – 14.0 |
| Characteristics | |
| Evolutionary stage | AGB |
| Spectral type | M6.5e – M9.5e |
| U−B color index | +0.15 |
| B−V color index | +1.73 |
| Variable type | Mira |
| Astrometry | |
| Proper motion (μ) | RA: 14.77 mas/yr Dec.: -10.87 mas/yr |
| Parallax (π) | 0.89 ± 2.08 mas |
| Distance | 480 ± 120 pc |
| Details | |
| Radius | 411 – 498 R☉ |
| Luminosity | 12,474 L☉ |
| Temperature | 2,950 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.