HD 128333

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.[3]

HD 128333
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension  14h 34m 39.62086s[1]
Declination +49° 22′ 06.0731″[1]
Apparent magnitude (V) 5.74[2]
Characteristics
Spectral type M1III[3]
U−B color index +1.88[2]
B−V color index +1.56[2]
R−I color index 0.72
Variable type Lb[4]
Astrometry
Radial velocity (Rv)-23.93[5] km/s
Proper motion (μ) RA: -45.50[1] mas/yr
Dec.: 50.15[1] mas/yr
Parallax (π)3.81 ± 0.26[1] mas
Distance860 ± 60 ly
(260 ± 20 pc)
Details
Luminosity917[6] L☉
Temperature3,945[6] K
Other designations
CH Boötis, BD+50 2095, FK5 3155, HD 128333, HIP 71280, HR 5452, SAO 45121.
Database references
SIMBADdata

References
  1. van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M.
  3. Eggen, O. J. (1992). "Asymptotic giant branch stars near the sun". The Astronomical Journal. 104: 275. Bibcode:1992AJ....104..275E. doi:10.1086/116239.
  4. Lebzelter, T.; Hinkle, K. H. (October 2002), "Velocity variability of semiregular and irregular variables", Astronomy and Astrophysics, 393: 563–571, Bibcode:2002A&A...393..563L, doi:10.1051/0004-6361:20021085.
  5. Famaey, B.; et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430: 165–186, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272.
  6. McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.


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