HD 128333

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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]
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]
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
Distance 860 ± 60 ly
(260 ± 20 pc)
Luminosity 917[6] L
Temperature 3,945[6] K
Other designations
CH Boötis, BD+50 2095, FK5 3155, HD 128333, HIP 71280, HR 5452, SAO 45121.
Database references

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]


  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752Freely accessible, doi:10.1051/0004-6361:20078357. 
  2. ^ a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data.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. ^ a b 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, Bibcode:2005A&A...430..165F, arXiv:astro-ph/0409579Freely accessible, doi:10.1051/0004-6361:20041272. 
  6. ^ a b McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, Bibcode:2012MNRAS.427..343M, arXiv:1208.2037Freely accessible, doi:10.1111/j.1365-2966.2012.21873.x. 

External links[edit]