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 | |
| Database references | |
| SIMBAD | data |
HD 187923 is a suspected variable star in the equatorial constellation of Aquila.
References
- 1 2 3 4 5 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. - 1 2 3 4 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
- ↑ 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
- 1 2 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M
- 1 2 3 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, arXiv:1010.2934, Bibcode:2011AJ....141...90L, doi:10.1088/0004-6256/141/3/90, 90
External links
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