R Serpentis

R Serpentis
Observation data
Epoch J2000      Equinox J2000
Constellation Serpens
Right ascension 15h 50m 41.7346s
Declination +15° 08 01.105
Apparent magnitude (V) 7.10
Characteristics
Spectral type M5-8e
B−V color index 1.39
Variable type Mira
Astrometry
Radial velocity (Rv)23.80 km/s
Proper motion (μ) RA: -1.31 mas/yr
Dec.: -35.73 mas/yr
Parallax (π)4.78 ± 1.84 mas
Distanceapprox. 700 ly
(approx. 210 pc)
Absolute magnitude (MV)0.50
Other designations
R Serpentis, HD 141850, BD+15° 2918, HIP 77615, HR 5894, SAO 101771.
Database references
SIMBADdata

R Serpentis (R Ser) is a Mira variable type star in the constellation Serpens. It ranges between apparent magnitude 5.1 and 14.4, and spectral types M5IIIe to M9e, over a period of 356 days.[1]

References

  1. Watson, Christopher (4 January 2010). "R Serpentis". AAVSO Website. American Association of Variable Star Observers. Retrieved 22 May 2014.


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