S Orionis

Not to be confused with Sigma Orionis or S Ori 70.
S Orionis

The visual band light curve of S Orionis, from AAVSO data[1]
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]
Distance480 ± 120[4] pc
Details
Radius411 – 498[4] R☉
Luminosity12,474[6] L☉
Temperature2,950[6] K
Other designations
S Ori, BD−04°1146, HD 36090, SAO 132163, HIP 25673
Database references
SIMBADdata

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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  2. ^ a b c d e Cite error: The named reference hipparcos was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference gcvs was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference wittkowski was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference ubv was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference uttenthaler was invoked but never defined (see the help page).