Chi Aquilae
 Location of χ Aquarii (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 42m 34.00828s[1] |
| Declination | +11° 49′ 35.7023″[1] |
| Apparent magnitude (V) | 5.292[2] (5.80/6.68)[3] |
| Characteristics | |
| Spectral type | G2 Ib-II + B5 V[3] |
| U−B color index | -0.04[4] |
| B−V color index | +0.57[4] |
| Astrometry | |
| Radial velocity (Rv) | -19.2[2] km/s |
| Proper motion (μ) | RA: 1.75[1] mas/yr Dec.: -10.11[1] mas/yr |
| Parallax (π) | 3.82 ± 0.51[1] mas |
| Distance | approx. 900 ly (approx. 260 pc) |
| Other designations | |
Chi Aquilae (χ Aql, χ Aquilae) is the Bayer designation for a binary star[3] in the equatorial constellation of Aquila, the eagle. This system is bright enough to be seen with the naked eye at a combined visual magnitude of +5.29.[2] Based upon parallax measurements made during the Hipparcos mission, Chi Aquilae is at a distance of approximately 900 light-years (280 parsecs) from Earth.[1]
The brighter member of Chi Aquilae is yellow-hued G-type star with a stellar classification of G2 Ib-II and an apparent magnitude of 5.80. A luminosity class of Ib-II indicates the spectrum lies midway between that of a bright giant and a supergiant star. The companion is a white-hued A-type main sequence star with a classification of B5 V and an apparent magnitude of 6.68.[3] As of 2004, the secondary is located at an angular separation of 0.418 arcseconds along a position angle of 76.7° from the primary.[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 3.0 3.1 3.2 3.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 4.0 4.1 4.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
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