RS Canum Venaticorum

RS Canum Venaticorum

Visual band light curves for RS Canum Venaticorum, adapted from Rodonò et al. (1995)[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Canes Venatici
Right ascension 13h 10m 36.908s[2]
Declination +35° 56′ 05.58″[2]
Apparent magnitude (V) 7.93[3] to 9.14 (secondary: 8.19)[4]
Characteristics
A
Evolutionary stage Main-sequence[5]
Spectral type F6IV[6] or F5V[5]
B−V color index 0.46[7]
B
Evolutionary stage Subgiant[5]
Spectral type G8IV[6] or K2IV[5]
B−V color index 0.91[7]
Variable type Algol and RS CVn[4]
Astrometry
Radial velocity (Rv)−13.62±0.44[8] km/s
Proper motion (μ) RA: −49.898 mas/yr[2]
Dec.: +20.754 mas/yr[2]
Parallax (π)7.3486 ± 0.0225 mas[2]
Distance444 ± 1 ly
(136.1 ± 0.4 pc)
Absolute magnitude (MV)2.95[9]
Orbit[10]
Period (P)4.797695 d
Eccentricity (e)0.00[1]
Inclination (i)85.55°
Periastron epoch (T)2,448,379.1993 HJD
Semi-amplitude (K1)
(primary)		90.2±0.1 km/s
Semi-amplitude (K2)
(secondary)		84.3 km/s
Details[10]
A
Mass1.44[7] M☉
Radius2.1 R☉
Temperature6,800 K
Rotation8.542 d
Rotational velocity (v sin i)11±2 km/s
Age2.5 Gyr
B
Mass1.31[7] M☉
Radius4.3 R☉
Temperature4,580 K
Rotational velocity (v sin i)42±3 km/s
Other designations
RS CVn, BD−36°2344, GJ 9430, HD 114519, HIP 64293, SAO 63382, WDS J13106+3556[11]
Database references
SIMBADdata

RS Canum Venaticorum is a binary star system in the northern constellation of Canes Venatici. It serves as the prototype to the class of RS Canum Venaticorum variables. The peak apparent visual magnitude of this system is below the level needed to observe it with the naked eye. It is located at a distance of approximately 443 light years from the Sun based on parallax,[2] but is drifting closer with a net radial velocity of −14 km/s.[8] Olin J. Eggen (1991) included this system as a member of the IC 2391 supercluster,[7] but it was later excluded.[12]

  1. ^ a b Cite error: The named reference Rodono1995 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. ^ Cite error: The named reference Malkov2006 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference gcvs was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference Messina2008 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Strassmeier1990 was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference Eggen1991 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Karataş2004 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference Xiang2020 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Eggen1995 was invoked but never defined (see the help page).