TU Corvi
Star in the constellation Corvus
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TU Corvi is a yellow-white hued star in the southern constellation of Corvus. It is a dimly visible to the naked eye with an apparent visual magnitude of 6.20.[2] The distance to this star can be estimated from its annual parallax shift of 13.3 mas, yielding a range of about 246 light years. Based upon measured changes in its proper motion, it may be a close binary system.[12]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Corvus[2] |
| Right ascension | 12h 35m 58.79603s[3] |
| Declination | −20° 31′ 38.9160″[3] |
| Apparent magnitude (V) | 6.20[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | F0 V[4] |
| B−V color index | 0.34±0.01[2] |
| Variable type | δ Sct[5][6] |
| Astrometry | |
| Radial velocity (Rv) | −2.0±4.3[7] km/s |
| Proper motion (μ) | RA: +30.202[3] mas/yr Dec.: −51.280[3] mas/yr |
| Parallax (π) | 13.2558±0.3343 mas[3] |
| Distance | 246 ± 6 ly (75 ± 2 pc) |
| Absolute magnitude (MV) | 2.08[2] |
| Details | |
| Mass | 1.45[8] M☉ |
| Radius | 2.7[3] R☉ |
| Luminosity | 12.6+1.2 −1.1[8] L☉ |
| Surface gravity (log g) | 3.93±0.14[8] cgs |
| Temperature | 7,132±242[8] K |
| Metallicity [Fe/H] | −0.07±0.07[9] dex |
| Rotational velocity (v sin i) | 103[10] km/s |
| Age | 786[8] Myr |
| Other designations | |
| TU Crv, AAVSO 1230-19, BD−19°3521, HD 109585, HIP 61496, HR 4797, SAO 180937[11] | |
| Database references | |
| SIMBAD | data |
This is an F-type main-sequence star with a stellar classification of F0 V.[4] Previously it had been classed as F0 III,[13] matching an evolved giant star. It is a Delta Scuti variable, varying by an amplitude of 0.025 in B magnitude with a period of 118 minutes.[5][6] At the age of 786[8] million years, it has a high rate of spin with a projected rotational velocity of 103 km/s.[10] The star has 1.45 times the mass of the Sun and is radiating 12.6 times the Sun's luminosity from its photosphere at an effective temperature of 7,132 K.[8]