V1339 Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | Template:RA |
| Declination | Template:DEC |
| Apparent magnitude (V) | 6.484 |
| Characteristics | |
| Spectral type | B2.5IVe |
| U−B Template:Engvar | -0.7 |
| B−V Template:Engvar | -0.1 |
| Variable type | Be star |
| Astrometry | |
| Radial velocity (Rv) | -30.10 ± 5 km/s |
| Proper motion (μ) | RA: -0.77 ± 0.39 mas/yr Dec.: -5.44 ± 0.46 mas/yr |
| Parallax (π) | 1.89±0.45 mas |
| Distance | approx. Template:Rnd ly (approx. Template:Rnd pc) |
| Details | |
| Mass | 13.0[2] Template:Solar mass |
| Radius | 7.7[2] Template:Solar radius |
| Temperature | 23310[2] K |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| SAO 125116, HD 187567, BD+07° 4252, HIP 97607, HR 7554. | |
| Database references | |
| SIMBAD | data |
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V1339 Aquilae, also known as HD 187567, is a Be star in the constellation Aquila. At its brightest its apparent magnitude is 6.22,[3] making it barely visible to the naked eye at a location with very little light pollution. It is located just 8 arc seconds from the center of the open cluster NGC 6828.[4]
V1339 Aquilae was discovered to be a Be star in 1925 by P. W. Merrill, M. L. Humason and C. G. Burwell.[5] The star's variability was detected in 1966 by A. W. J. Cousins, R. Lake and R. H. Stoy,[6] and because of this it was given its variable star designation, V1339 Aquilae, in 1979.[7]
V1339 Aquilae is around 13 times as massive as the Sun and has 7.7 times its diameter.[2] Its binary nature was discovered by speckle interferometry in 1983, at the Kitt Peak 4 meter telescope. At the time of these speckle observations the stars were separated by 0.057 arc seconds.[8]
References
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