V1339 Aquilae
Appearance
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Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquila |
Right ascension | 19h 50m 17.47943s |
Declination | +07° 54′ 08.6934″ |
Apparent magnitude (V) | 6.484 |
Characteristics | |
Spectral type | B2.5IVe |
U−B color index | -0.7 |
B−V color index | -0.1 |
Variable type | Be star |
Astrometry | |
Radial velocity (Rv) | -30.10 ± 5 km/s |
Proper motion ( | RA: -0.77 ± 0.39 mas/yr Dec.: -5.44 ± 0.46 mas/yr |
Parallax ( | 1.89 ± 0.45 mas |
Distance | approx. 1,700 ly (approx. 500 pc) |
Details | |
Mass | 13.0[1] M☉ |
Radius | 7.7[1] R☉ |
Temperature | 23310[1] K |
Other designations | |
Database references | |
SIMBAD | data |
V1339 Aquilae, also known as HD 187567, is a Be star in the constellation Aquila. It is around 13 times as massive as the Sun and has 7.7 times its diameter.[1]
Its binary nature was discovered by speckle interferometry.
References
[edit]- ^ a b c d Catanzaro, G. (2013). "Spectroscopic atlas of H
α and Hβ in a sample of northern Be stars". Astronomy & Astrophysics. 550: 18. arXiv:1212.6608. Bibcode:2013A&A...550A..79C. doi:10.1051/0004-6361/201220357. A79.