R Equulei

R Equulei

The visual band light curve of R Equulei, from AAVSO data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Equuleus
Right ascension 21h 13m 11.49118s[2]
Declination 12° 48′ 06.1620″[2]
Apparent magnitude (V) 8.7 - 15.0[3]
Characteristics
Spectral type M3e - M4e[3]
B−V color index +1.41[4]
Variable type Mira[3]
Astrometry
Radial velocity (Rv)−54±5[5] km/s
Proper motion (μ) RA: −2.713[2] mas/yr
Dec.: −11.232[2] mas/yr
Parallax (π)0.4329 ± 0.0437 mas[2]
Distanceapprox. 7,500 ly
(approx. 2,300 pc)
Details
Mass3.42[6] M☉
Luminosity33,791[7] L☉
Surface gravity (log g)−0.007[6] cgs
Temperature3,395[6] K
Metallicity [Fe/H]−0.13[6] dex
Other designations
R Equ, BD+12°4573a, HD 202051, PPM 139768[8]
Database references
SIMBADdata

R Equulei is a class M Mira variable star in the constellation Equuleus. Its brightness varies between a minimum magnitude of 15.0 to a maximum of 8.7 with an average period of 261 days.[3]

  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 GaiaEDR3 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference gcvs was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Zacharias_et_al_2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Wilson1953 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference starhorse was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference simbad was invoked but never defined (see the help page).