S Orionis

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S Orionis
Observation data
Epoch J2000      Equinox J2000
Constellation Orion
Right ascension 05h 29m 00.8948s[1]
Declination −04° 41′ 32.748″[1]
Apparent magnitude (V) 9.20[1]
Characteristics
Spectral type M7e
U−B color index +0.15[1]
B−V color index +1.73[1]
Variable type Mira variable
Astrometry
Proper motion (μ) RA: 14.77 mas/yr
Dec.: -10.87 mas/yr
Parallax (π) 0.32 ± 2.56 mas
Details
Radius 400—500 R☉
Other designations

S Orionis is a red giant star in the constellation Orion. It is a Mira variable that pulsates with a 420–day cycle, and varies in radius from 1.9 to 2.3 astronomical units.[2]

References

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  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
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