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] |
Distance | 690 ± 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 | |
Mass | 1.64±0.14 [9] M☉ |
Radius | 2.16 or 2.18 ± 0.08 [9] R☉ |
Luminosity | 8.4 or 8.5 ± 0.6 [9] L☉ |
Secondary | |
Mass | 0.44±0.03 [9] M☉ |
Radius | 1.19 or 1.20 ±0.04 [9] R☉ |
Luminosity | 1.2 or 1.5 ± 0.1 [9] L☉ |
Other designations | |
Database references | |
SIMBAD | data |
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]
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] |
Distance | 690 ± 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 | |
Mass | 1.64±0.14 [9] M☉ |
Radius | 2.16 or 2.18 ± 0.08 [9] R☉ |
Luminosity | 8.4 or 8.5 ± 0.6 [9] L☉ |
Secondary | |
Mass | 0.44±0.03 [9] M☉ |
Radius | 1.19 or 1.20 ±0.04 [9] R☉ |
Luminosity | 1.2 or 1.5 ± 0.1 [9] L☉ |
Other designations | |
Database references | |
SIMBAD | data |
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]