Back S Orionis AST S d'Orió Catalan S Orionis German S Orionis Spanish اس شکارچی Persian S Orionis Hungarian S Orionis ID S Orionis Italian オリオン座S星 Japanese 오리온자리 S Korean
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 29m 00.8948s[2] |
| Declination | −04° 41′ 32.748″[2] |
| Apparent magnitude (V) | 7.2 – 14.0[3] |
| Characteristics | |
| Evolutionary stage | AGB[4] |
| Spectral type | M6.5e – M9.5e[3] |
| U−B color index | +0.15[5] |
| B−V color index | +1.73[5] |
| Variable type | Mira[3] |
| Astrometry | |
| Proper motion (μ) | RA: 14.77[2] mas/yr Dec.: -10.87[2] mas/yr |
| Parallax (π) | 0.89 ± 2.08 mas[2] |
| Distance | 480 ± 120[4] pc |
| Details | |
| Radius | 411 – 498[4] R☉ |
| Luminosity | 12,474[6] L☉ |
| Temperature | 2,950[6] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.
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