Xi Aquilae
From Wikipedia, the free encyclopedia
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 54m 14.8816s |
| Declination | +08° 27′ 41.23″ |
| Apparent magnitude (V) | 4.722 |
| Characteristics | |
| Spectral type | G9IIIb |
| U−B color index | 0.91 |
| B−V color index | 1.05 |
| R−I color index | 0.57 |
| Astrometry | |
| Radial velocity (Rv) | -41.8 ± 0.9 km/s |
| Proper motion (μ) | RA: 101.43 ± 0.78 mas/yr Dec.: -81.28 ± 0.66 mas/yr |
| Parallax (π) | 15.96 ± 1.01 mas |
| Distance | 200 ± 10 ly (63 ± 4 pc) |
| Absolute magnitude (MV) | 5.769 |
| Details | |
| Mass | 2.2 M☉ |
| Radius | 12 R☉ |
| Luminosity | 1,900 L☉ |
| Temperature | 4780 (± 30) K |
| Metallicity | -0.205 (± 0.039) dex |
| Rotation | < 19 Km/s 32 days |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
|
Xi Aquilae (ξ Aql, ξ Aquilae) is a yellow giant star approximately 204 light-years away in the constellation of Aquila. As of 2008, an extrasolar planet has been confirmed to be orbiting the star.
[edit] Planetary system
It has a 2.8 Jupiter mass planet orbiting at 0.68 AU, designated as Xi Aquilae b.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | >2.8 MJ | 0.68 | 136.75 ± 0.25 | 0 (fixed) |
[edit] References
[edit] External links
- "ksi Aql". Exoplanets. http://media4.obspm.fr/exoplanets/base/etoile.php?nom=ksi+Aql. Retrieved 2008-06-25.
- "Notes for star ksi Aql". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=ksi+Aql. Retrieved 2008-06-25.
- HR 7595
- Image Xi Aquilae
- wikisky.org
Coordinates: 
19h 54m 15s, +08° 27′ 41″
|
|||||||||||
 |
This giant star-related article is a stub. You can help Wikipedia by expanding it. |
 |
This extrasolar planet related article is a stub. You can help Wikipedia by expanding it. |
