HD 126009 or CI Boötis is a variable star[4] in the northern constellation of Boötes.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 22m 14.00145s[2] |
| Declination | +29° 22′ 11.7169″[2] |
| Apparent magnitude (V) | 6.6[3] |
| Characteristics | |
| Spectral type | M3III[4] |
| U−B color index | +1.46[3] |
| B−V color index | +1.60[3] |
| Variable type | Irregular[5] |
| Astrometry | |
| Radial velocity (Rv) | −19.66±0.54[6] km/s |
| Proper motion (μ) | RA: -38.37[2] mas/yr Dec.: -25.87[2] mas/yr |
| Parallax (π) | 4.23 ± 0.47 mas[2] |
| Distance | approx. 770 ly (approx. 240 pc) |
| Details | |
| Luminosity | 1,875[7] L☉ |
| Temperature | 3,387[7] K |
| Other designations | |
CI Boötes, BD+30° 2513, HD126009, HIP 70236, SAO 83312. | |
| Database references | |
| SIMBAD | data |
Constellation of Boötes | |||||||||||
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