HD 128198

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HD 128198
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension  14h 34m 38.5001s[1]
Declination +36° 37′ 33.83″[1]
Apparent magnitude (V) 6.1657[2]
Spectral type K4III[3]
U−B color index +1.59[4]
B−V color index +1.38[4]
Radial velocity (Rv)−9.88±0.20[2] km/s
Proper motion (μ) RA: −24.61[1] mas/yr
Dec.: −46.29[1] mas/yr
Parallax (π)6.43 ± 0.42[1] mas
Distance510 ± 30 ly
(160 ± 10 pc)
Luminosity161[5] L
Temperature4,300[5] K
Metallicity [Fe/H]−0.11±0.09 [6] dex
Other designations
BD+37° 2551, HD 128198, HIP 71277, HR 5448, SAO 64227.
Database references

HD 128198 is a giant star 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 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.
  3. ^ Sato, K.; Kuji, S. (November 1990), "MK classification and photometry of stars used for time and latitude observations at Mizusawa and Washington", Astronomy and Astrophysics Supplement Series, 85 (3): 1069–1087, Bibcode:1990A&AS...85.1069S.
  4. ^ a b Guetter, H. H.; Hewitt, A. V. (June 1984), "Photoelectric UBV photometry for 317 PZT and VZT stars", Publications of the Astronomical Society of the Pacific, 96: 441–443, Bibcode:1984PASP...96..441G, doi:10.1086/131362.
  5. ^ 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.
  6. ^ Taylor, B. J. (February 1999), "Catalogs of temperatures and [Fe/H] averages for evolved G and K stars", Astronomy and Astrophysics Supplement, 134: 523–524, Bibcode:1999A&AS..134..523T, doi:10.1051/aas:1999153.

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