V923 Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 30m 33.12318s[1] |
| Declination | +03° 26′ 39.8594″[1] |
| Apparent magnitude (V) | 6.06[2] |
| Characteristics | |
| Spectral type | B7III[3] |
| U−B color index | -0.31[2] |
| B−V color index | −0.02[2] |
| Variable type | γ Cas |
| Astrometry | |
| Radial velocity (Rv) | -26[4] km/s |
| Proper motion (μ) | RA: 14.42[1] mas/yr Dec.: 2.20[1] mas/yr |
| Parallax (π) | 4.03 ± 0.31 mas[1] |
| Distance | 810 ± 60 ly (250 ± 20 pc) |
| Details | |
| Luminosity | 175[5] L☉ |
| Temperature | 8,115[5] K |
| Rotational velocity (v sin i) | 300[6] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
V923 Aquilae is a Be star in the equatorial constellation of Aquila. It is a binary star with a low mass secondary star orbiting at a separation of around 250 times the radius of the Sun. The primary varies with both short term and long term periodicity.[7]
References
- ^ 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.
- ^ a b c Haupt, H. F.; Schroll, A. (1974), "Photoelektrische Photometrie von Shell-Sternen", Astronomy and Astrophysics Supplement Series, 15: 311, Bibcode:1974A&AS...15..311H
- ^ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 05: 0. Bibcode:1999MSS...C05....0H.
- ^ Kharchenko, N. V.; et al. (2007), "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations", Astronomische Nachrichten, 328 (9): 889–896, arXiv:0705.0878, Bibcode:2007AN....328..889K, doi:10.1002/asna.200710776
- ^ 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
{{citation}}: CS1 maint: unflagged free DOI (link) - ^ Slettebak, A. (September 1982), "Spectral types and rotational velocities of the brighter Be stars and A-F type shell stars", Astrophysical Journal Supplement Series, 50: 55–83, Bibcode:1982ApJS...50...55S, doi:10.1086/190820
- ^ Arias, M. L.; et al. (April 2004), "The circumstellar environment of the star V923 Aquilae", Astronomy and Astrophysics, 417 (2): 679–688, Bibcode:2004A&A...417..679A, doi:10.1051/0004-6361:20034435
External links
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