VV Corvi

VV Corvi (abbreviated as VV Crv) is an eclipsing binary in the constellation Corvus. At an apparent magnitude of 5.843, the system is faintly visible to the naked eye in regions not significantly affected by light pollution. Parallax measurements imply a distance of 266 light-years (82 parsecs).

VV Corvi

A light curve for VV Corvi, plotted from TESS data[1]
Observation data Epoch J2000      Equinox J2000
Constellation	Corvus[2]
Right ascension	12h 41m 15.9526s[3]
Declination	−13° 00′ 50.036″[3]
Apparent magnitude (V)	5.843±0.010 (6.10 + 7.54)[4]
Characteristics
Spectral type	F5V + F5V[4]
U−B color index	+0.10[5]
B−V color index	+0.42[5]
Variable type	Eclipsing[4]
Astrometry
Radial velocity (Rv)	−10.14±0.17[4] km/s
Proper motion (μ)	RA: −117.671 mas/yr[3] Dec.: +8.138 mas/yr[3]
Parallax (π)	12.2688±0.0530 mas[3]
Distance	266 ± 1 ly (81.5 ± 0.4 pc)
Absolute magnitude (MV)	1.581±0.034[4]
Orbit
Primary	VV Corvi A
Companion	VV Corvi B
Period (P)	3.1445358(97) days
Semi-major axis (a)	13.70±0.03 R☉
Eccentricity (e)	0.0852±0.0010
Inclination (i)	88.47±0.24°
Semi-amplitude (K1) (primary)	95.82±0.05 km/s
Semi-amplitude (K2) (secondary)	129.29±0.05 km/s
Details[4]
VV Corvi A
Mass	1.978±0.010 M☉
Radius	3.375±0.010 R☉
Luminosity	18±2 L☉
Temperature	6,500 K
Metallicity [Fe/H]	+0.3 dex
Rotational velocity (v sin i)	81±3 km/s
Age	1.2 Gyr
VV Corvi B
Mass	1.513±0.008 M☉
Radius	1.650±0.008 R☉
Luminosity	4.7±0.6 L☉
Temperature	6,638 K
Metallicity [Fe/H]	+0.3 dex
Rotational velocity (v sin i)	24±2 km/s
Age	1.2 Gyr
Other designations
BD−12°3676, HD 110317, HIP 61910, HR 4821[6]
Database references
SIMBAD	data

The two stars orbit each other with an orbital period of 1.46 days and an eccentricity of 0.088.^[7] The primary is 1.98 times as massive as the Sun, has 3.375 the Sun's radius and 18 its luminosity. The secondary is 1.513 times as massive as the Sun, has 1.650 the Sun's radius and 4.745 times its luminosity. Both are F-type main-sequence stars of spectral type F5V, though the primary has begun expanding and cooling as it nears the end of its time on the main sequence.^[4] A tertiary companion was discovered during the Two Micron All-Sky Survey.^[8]

VV Corvi makes part of a multiple star system. It is the secondary component of the sextuple^[a] star system ADS 8627, whose primary member is HR 4822,^[4] a magnitude 5.98 star separated by 5.24" from VV Corvi,^[9] which at the system's distance implies a projected separation of 416 astronomical units and an orbital period around 3,500 years.^[4] HR 4822 is itself a triple star system.^[4] The third component, separated by 59.5" from the primary and secondary, is BD-12°3675, a magnitude magnitude 10.28 star.^[9]

Notes

1. While classified as a quintuple in Fekel et al. 2013, with BD-12°3675 being only a candidate member, BD-12°3675 was included in Tokovinin's Multiple Star Catalog.^[9]