A visual band light curve for UU Comae Berenices from MOST data. Adapted from Paunzen et al. (2019)[1] | |
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Coma Berenices |
Right ascension | 12h 31m 00.561s[2] |
Declination | +24° 34′ 01.80″[2] |
Apparent magnitude (V) | 5.47[3] or 5.41 – 5.46[4] |
Characteristics | |
Evolutionary stage | main sequence[1] |
Spectral type | A3p SrCr[5] |
B−V color index | 0.056±0.008[3] |
Variable type | α2 CVn[1] + δ Sct[4] |
Astrometry | |
Radial velocity (Rv) | +1.0±1.8[3] km/s |
Proper motion (μ) | RA: −12.474 mas/yr[2] Dec.: −9.085 mas/yr[2] |
Parallax (π) | 12.0785 ± 0.1214 mas[2] |
Distance | 270 ± 3 ly (82.8 ± 0.8 pc) |
Absolute magnitude (MV) | 0.66[3] |
Details[1] | |
Mass | 2.29±0.10 M☉ |
Radius | 2.6±0.2 R☉ |
Luminosity | 38.2±1.3 L☉ |
Surface gravity (log g) | 3.9±0.2 cgs |
Temperature | 8,900±200 K |
Rotation | 2.05219 d |
Rotational velocity (v sin i) | 63±2 km/s |
Age | 400–800 Myr |
Other designations | |
Database references | |
SIMBAD | data |
21 Comae Berenices is a variable star in the northern constellation of Coma Berenices.[8] It has the variable star designation UU Comae Berenices, while 21 Comae Berenices is the Flamsteed designation.[7][8][9]
Paunzen2019
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