HD 128333 or CH Boötis is an irregular variable star in the northern constellation of Boötes. It is currently on the asymptotic giant branch of the HR diagram.[4]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 34m 39.62086s[2] |
| Declination | +49° 22′ 06.0731″[2] |
| Apparent magnitude (V) | 5.74[3] |
| Characteristics | |
| Spectral type | M1III[4] |
| U−B color index | +1.88[3] |
| B−V color index | +1.56[3] |
| R−I color index | 0.72 |
| Variable type | Lb[5] |
| Astrometry | |
| Radial velocity (Rv) | -23.93[6] km/s |
| Proper motion (μ) | RA: -45.50[2] mas/yr Dec.: 50.15[2] mas/yr |
| Parallax (π) | 3.81 ± 0.26 mas[2] |
| Distance | 860 ± 60 ly (260 ± 20 pc) |
| Details | |
| Luminosity | 917[7] L☉ |
| Temperature | 3,945[7] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
Constellation of Boötes | |||||||||||
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