18 Delphini
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| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Delphinus |
| Right ascension | 20h 58m 25.93s |
| Declination | +10º 50' 21.43″ |
| Apparent magnitude (V) | 5.522 |
| Absolute magnitude (V) | 1.202 |
| Distance | 238.493 ly (73.121 pc) |
| Spectral type | G6III: |
| Other designations | |
| Database references | |
| SIMBAD | data |
18 Delphini is a yellow giant star approximately 238 light-years away in the constellation of Delphinus. As of 2008[update], an extrasolar planet was confirmed to be orbiting the star.
[edit] Planetary system
On February 19, 2008, a 10.3 Jupiter mass extrasolar planet (named 18 Delphini b) is found orbiting around the star.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | >10.3 MJ | 2.6 | 993.3±3.2 | 0.08±0.01 |
[edit] External links
- "Notes for star 18 Del". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=18+Del. Retrieved on 2008-06-30.
Coordinates: 
20h 58m 26s, +10° 50′ 21″
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