QS Aquilae
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquila |
Right ascension | 19h 41m 05.528s[1] |
Declination | +13° 48′ 56.45″[1] |
Apparent magnitude (V) | 5.988 |
Characteristics | |
Spectral type | B5V |
U−B color index | −0.52 |
B−V color index | −0.08 |
Variable type | Eclipsing binary[2] |
Astrometry | |
Radial velocity (Rv) | −14.2 ± 2 km/s |
Proper motion (μ) | RA: −0.04 ± 0.60[1] mas/yr Dec.: −11.47 ± 0.43[1] mas/yr |
Parallax (π) | 0.49 ± 0.62[1] mas |
Orbit[2] | |
Primary | QS Aquilae AB (eclipsing pair) |
Companion | QS Aquilae C |
Period (P) | ±4.3 77.0yr |
Semi-major axis (a) | ±0.045″ 0.111 |
Eccentricity (e) | ±0.038 0.947 |
Inclination (i) | ±3.6 61.2° |
Longitude of the node (Ω) | ±5.1 144.5° |
Periastron epoch (T) | 962.3±2.3 1 |
Argument of periastron (ω) (secondary) | ±4.7 336.8° |
Orbit[2] | |
Primary | QS Aquilae A |
Companion | QS Aquilae B |
Period (P) | 2987±0.0000075 d 2.513 |
Semi-major axis (a) | ±0.11 R⊙ 13.78 |
Inclination (i) | ±1.3 83.6° |
Semi-amplitude (K1) (primary) | ±0.33 km/s 73.98 |
Semi-amplitude (K2) (secondary) | ±2.09 km/s 201.76 |
Other designations | |
Database references | |
SIMBAD | data |
QS Aquilae is a triple star system consisting of a eclipsing binary in a 2.5 day orbit around which a third star orbits in 77 years.[2] It is located in the constellation Aquila and is barely visible to the naked eye.
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. Vizier catalog entry
- 1 2 3 4 Zasche, P.; et al. (2017). "V773 Cas, QS Aql, and BR Ind: Eclipsing Binaries as Parts of Multiple Systems". The Astronomical Journal. 153 (1). 36. arXiv:1701.02537. Bibcode:2017AJ....153...36Z. doi:10.3847/1538-3881/153/1/36.
- ↑ "QS Aquilae". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-08.
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