S Orionis

from Wikipedia, the free encyclopedia

Database links to S Orionis

Star
S Orionis

Observation
dates equinox : J2000.0 , epoch : J2000.0

Right ascension

05 ^h 29 ^m 0.9 ^s

-04 ° 41 ′ 32.8 ″

Apparent brightness

11.16 mag

Typing

B − V color index

+1.73

U − B color index

+0.15

M6.5-M9.5e

Variable star type

Radial velocity

(22.0 ± 4.8) km / s

distance

~ 10000 ly
~ 3000 pc

Proper movement

Rec. Share:

(+11.57 ± 2.57) mas / a

Dec. portion:

(−11.34 ± 1.62) mas / a

Physical Properties

400 to 500 r _☉

Other names
and catalog entries

Bonn survey	BD −4 ° 1146
Henry Draper Catalog	HD 36090 [1]
Hipparcos catalog	HIP 25673 [2]
SAO catalog	SAO 132163 [3]
Tycho catalog	TYC 4761-1622-1 [4]
2MASS catalog	2MASS J05290088-0441328 [5]

S Orionis is a red giant in the constellation Orion . It is one of the Mira variables and pulsates in a rhythm of 420 days. Its radius varies from 1.9 to 2.3 AU.

See also

Individual evidence