RV Corvi

RV Corvi

A light curve for RV Corvi, plotted from TESS data[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Corvus
Right ascension 12h 37m 40.711s[2]
Declination −19° 34′ 40.03″[2]
Apparent magnitude (V) 8.77[3] (8.6 - 9.16)[4]
Characteristics
Evolutionary stage Main sequence
Spectral type F0V[5] (F0 + G0)[6]
B−V color index 0.404±0.026[3]
Variable type β Lyr[7]
Astrometry
Radial velocity (Rv)19.0±4.6[8] km/s
Proper motion (μ) RA: −29.326 mas/yr[2]
Dec.: 8.954 mas/yr[2]
Parallax (π)4.7351 ± 0.0812 mas[2]
Distance690 ± 10 ly
(211 ± 4 pc)
Absolute magnitude (MV)2.32[3]
Orbit[9]
Period (P)0.7473 d
Eccentricity (e)0.00
Periastron epoch (T)2445792.3578
Argument of periastron (ω)
(secondary)		0.00°
Semi-amplitude (K1)
(primary)		64 km/s
Semi-amplitude (K2)
(secondary)		235 km/s
Details
Primary
Mass1.64±0.14[9] M☉
Radius2.16 or 2.18 ± 0.08[9] R☉
Luminosity8.4 or 8.5 ± 0.6[9] L☉
Secondary
Mass0.44±0.03[9] M☉
Radius1.19 or 1.20 ±0.04[9] R☉
Luminosity1.2 or 1.5 ± 0.1[9] L☉
Other designations
RV Crv, BD−18° 3431, HD 109796, HIP 61620[10]
Database references
SIMBADdata

RV Corvi is an eclipsing binary star system in the southern constellation of Corvus. The brightness of the pair regularly ranges in apparent visual magnitude from 8.6 down to 9.16 over a period 18 hours,[4] even the brightest of which is too faint to be visible to the naked eye. The system is located at a distance of approximately 690 light-years from the Sun based on parallax measurements, and is drifting further away with a radial velocity of ~19 km/s.[8]

The variability of this system was discovered by H. H. Swope.[11] In 1942, Irene G. Buttery published an orbital period of 0.74728 days for the system, showing this is an eclipsing binary.[12] It is a near-contact binary with both stars showing the effect of tidal interactions and the facing sides are less than 10% of the orbital separation apart, but are not in contact.[13] One or both stars may show an excess of luminosity on their facing sides.[9] The system is composed of stars of spectral types F0 and G0, which orbit each other every 0.7473 days.[6]

  1. ^ Cite error: The named reference MAST was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference AAVSORV was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Houk_Smith-Moore_1978 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference aaa446_2_785 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Samus_et_al_2017 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  9. ^ a b c d e f g h Cite error: The named reference McFarlane_et_al_1986 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 Abhyankar_et_al_1974 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Buttery1942 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Shaw_et_al_1996 was invoked but never defined (see the help page).