HD 187923

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 187923
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 19h 52m 03.43868s[1]
Declination +11° 37′ 41.9767″[1]
Apparent magnitude (V) 6.148[2]
Characteristics
Spectral type G0V[3]
U−B color index +0.12[4]
B−V color index +0.65[4]
Astrometry
Radial velocity (Rv) −20.7±0.2[2] km/s
Proper motion (μ) RA: −343.68[1] mas/yr
Dec.: -333.92[1] mas/yr
Parallax (π) 37.57 ± 0.34[1] mas
Distance 86.8 ± 0.8 ly
(26.6 ± 0.2 pc)
Absolute magnitude (MV) 3.94[2]
Details
Surface gravity (log g) 3.99[5] cgs
Temperature 5,700[5] K
Metallicity [Fe/H] −0.14[5] dex
Age 10.3[2] Gyr
Other designations
BD+11° 4019, GJ 4126, HD 188385, HIP 97767, HR 7569, LTT 15805, SAO 105348.
Database references
SIMBAD data

HD 187923 is a suspected variable star in the equatorial constellation of Aquila.

References[edit]

  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 d Nordström, B. et al. (May 2004), "The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of 14,000 F and G dwarfs", Astronomy and Astrophysics 418: 989–1019, arXiv:astro-ph/0405198, Bibcode:2004A&A...418..989N, doi:10.1051/0004-6361:20035959 
  3. ^ Cenarro, A. J. et al. (July 2009), "Mg and TiO spectral features at the near-IR: spectrophotometric index definitions and empirical calibrations", Monthly Notices of the Royal Astronomical Society 396 (4): 1895−1914, arXiv:0903.4835, Bibcode:2009MNRAS.396.1895C, doi:10.1111/j.1365-2966.2009.14839.x 
  4. ^ a b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M 
  5. ^ a b c Lee, Young Sun et al. (March 2011), "The SEGUE Stellar Parameter Pipeline. V. Estimation of Alpha-element Abundance Ratios from Low-resolution SDSS/SEGUE Stellar Spectra", The Astronomical Journal 141 (3): 18, Bibcode:2011AJ....141...90L, doi:10.1088/0004-6256/141/3/90, 90 

External links[edit]