HD 118889

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 118889
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 13h 39m 34.61613s[1]
Declination +10° 44′ 46.5827″[1]
Apparent magnitude (V) 5.58[2] (6.35 + 6.47)[3]
Characteristics
Spectral type F0V[4]
U−B color index +0.045[2]
B−V color index +0.33[2]
Astrometry
Radial velocity (Rv) -25.9[5] km/s
Proper motion (μ) RA: -114.96[1] mas/yr
Dec.: -11.74[1] mas/yr
Parallax (π) 16.67 ± 0.58[1] mas
Distance 196 ± 7 ly
(60 ± 2 pc)
Absolute magnitude (MV) +2.40[6]
Details
Luminosity 16.4[7] L
Temperature 7,105[7] K
Rotational velocity (v sin i) 144[4] km/s
Orbit[3]
Companion CCDM 13395+1045 B
BU 612
Period (P) 22.46 yr
Semi-major axis (a) 0.1998"
Eccentricity (e) 0.5450
Inclination (i) 47.8°
Longitude of the node (Ω) 35.4°
Periastron epoch (T) 1929.69
Other designations
BD+11° 2589, HD 118889, HIP 66640, HR 5138, SAO 100654.
Database references
SIMBAD data

HD 118889 is a binary star in the northern constellation of Boötes.

References[edit]

  1. ^ a b c d e van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, 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 ^ a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data.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 Malkov, O. Yu.; et al. (2012), "Dynamical Masses of a Selected Sample of Orbital Binaries", Astronomy & Astrophysics, 546: 5, Bibcode:2012A&A...546A..69M, doi:10.1051/0004-6361/201219774, A69 
  4. ^ a b Royer, F.; et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785Freely accessible, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224 
  5. ^ Holmberg, J.; et al. (2007), "The Geneva-Copenhagen survey of the Solar neighbourhood. II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk", Astronomy & Astrophysics, 475 (2): 519–537, arXiv:0707.1891Freely accessible, Bibcode:2007A&A...475..519H, doi:10.1051/0004-6361:20077221 
  6. ^ Reiners, A. (January 2006), "Rotation- and temperature-dependence of stellar latitudinal differential rotation", Astronomy and Astrophysics, 446 (1): 267–277, arXiv:astro-ph/0509399Freely accessible, Bibcode:2006A&A...446..267R, doi:10.1051/0004-6361:20053911. 
  7. ^ 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:1208.2037Freely accessible, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x 

External links[edit]