R Serpentis

R Serpentis

The visual band light curve of R Serpentis, from AAVSO data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Serpens
Right ascension 15h 50m 41.73245s[2]
Declination +15° 08′ 01.0810″[2]
Apparent magnitude (V) 9.70[3]
Characteristics
Spectral type M5-8e[4]
B−V color index 1.500±0.510[3]
Variable type Mira[5]
Astrometry
Radial velocity (Rv)23.8±0.8[6] km/s
Proper motion (μ) RA: +2.387[2] mas/yr
Dec.: −36.699[2] mas/yr
Parallax (π)3.5110 ± 0.2966 mas[2]
Distance930 ± 80 ly
(280 ± 20 pc)
Details
Radius~380[7] R☉
Luminosity1,704.70[8] L☉
Temperature2,780±80[9] K
Other designations
R Ser, BD+15° 2918, HD 141850, HIP 77615, HR 5894, SAO 101771[10]
Database references
SIMBADdata

R Serpentis is a Mira variable type star in the equatorial constellation of Serpens. It ranges between apparent magnitude 5.16 and 14.4, and spectral types M5e to M8e, over a period of 356.41 days.[5][11] The variability of this star was discovered in 1826 by Karl Ludwig Harding.[12]

  1. ^ Cite error: The named reference aavso was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Keenan1974 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference gcvs was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference pulkovo was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference CADARS was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference McDonald2012 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Hofmann2002 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference AAVSOR was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Zsoldos1994 was invoked but never defined (see the help page).