HD 126009

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HD 126009
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension  14h 22m 14.00145s[1]
Declination +29° 22′ 11.7169″[1]
Apparent magnitude (V) 6.6[2]
Spectral type M3III[3]
U−B color index +1.46[2]
B−V color index +1.60[2]
Variable type Irregular[4]
Radial velocity (Rv)−19.66±0.54[5] km/s
Proper motion (μ) RA: -38.37[1] mas/yr
Dec.: -25.87[1] mas/yr
Parallax (π)4.23 ± 0.47[1] mas
Distanceapprox. 770 ly
(approx. 240 pc)
Luminosity1,875[6] L
Temperature3,387[6] K
Other designations
CI Boötes, BD+30° 2513, HD126009, HIP 70236, SAO 83312.
Database references

HD 126009 or CI Boötis is a variable star[3] in the northern constellation of Boötes.


  1. ^ a b c d e 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. ^ a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data.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 Tabur, V.; Bedding, T. R. (2009), "Long-term photometry and periods for 261 nearby pulsating M giants", Monthly Notices of the Royal Astronomical Society, 400 (4): 1945–61, arXiv:0908.3228, Bibcode:2009MNRAS.400.1945T, doi:10.1111/j.1365-2966.2009.15588.x
  4. ^ Mennessier, M. O.; et al. (August 2001), "Long period variable stars: galactic populations and infrared luminosity calibrations", Astronomy and Astrophysics, 374: 968–979, arXiv:astro-ph/0105552, Bibcode:2001A&A...374..968M, doi:10.1051/0004-6361:20010764.
  5. ^ Famaey, B.; et al. (2009). "Spectroscopic binaries among Hipparcos M giants,. I. Data, orbits, and intrinsic variations". Astronomy and Astrophysics. 498 (2): 627–640. arXiv:0901.0934. Bibcode:2009A&A...498..627F. doi:10.1051/0004-6361/200810698.
  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, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x

External links[edit]