| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Canes Venatici |
| Right ascension | 13h 51m 47.47504s[2] |
| Declination | +34° 26′ 39.2474″[2] |
| Apparent magnitude (V) | 4.76[3](4.73 – 4.85)[4] |
| Characteristics | |
| Spectral type | M3- IIIa[5] |
| B−Vcolor index | 1.611±0.006[3] |
| Variable type | Lb[4] |
| Astrometry | |
| Radial velocity (Rv) | −44.21±0.25[3] km/s |
| Proper motion (μ) | RA: −20.477[2]mas/yr Dec.: −31.626[2]mas/yr |
| Parallax (π) | 5.2734±0.2529 mas[2] |
| Distance | 620 ± 30 ly (190 ± 9 pc) |
| Absolute magnitude (MV) | −1.56[3] |
| Details | |
| Mass | 2.18±0.16[6] M☉ |
| Radius | 117.41+4.25 −4.57[6] R☉ |
| Luminosity | 2,387±213[6] L☉ |
| Surface gravity (log g) | 0.98±0.30[7] cgs |
| Temperature | 3,529±25[7] K |
| Metallicity [Fe/H] | −0.09±0.11[7] dex |
| Age | 1.11±0.21[6] Gyr |
| Other designations | |
| AW CVn,AAVSO 1347+34,BD+35°2496,FK5 3102,HD 120933,HIP 67665,HR 5219,SAO 63793[8] | |
| Database references | |
| SIMBAD | data |
AW Canum Venaticorum is avariable star[4] in theconstellationCanes Venatici. It is visible to thenaked eye with a nominalapparent visual magnitude of 4.76.[3] The distance to this star, as measured from its annualparallax shift of5.3 mas,[2] is around 620 light years. It is moving closer with a heliocentricradial velocity of −44 km/s.[3]
The variability of the brightness of HR 5219 was announced byJoel Stebbins andCharles Morse Huffer in 1928, based on observations made atWashburn Observatory.[9] It was given itsvariable star designation, AW Canum Venaticorum, in 1977.[10]
At the age of 1.1 billion years,[6] this is anevolvedred giant star with astellar classification of M3- IIIa.[5] It is aslow irregular variable of type Lb, with a brightness that ranges between magnitudes 4.73 and 4.85.[4] The star has 2.2[6] times themass of the Sun and has expanded to 117[6] times theSun's radius. It is radiating 2,387[6] times theSun's luminosity from its enlargedphotosphere at aneffective temperature of 3,529 K.[7]
