18 Delphini b
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| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | 18 Delphini | |
| Constellation | Delphinus | |
| Right ascension | (α) | 20h 58m 26s |
| Declination | (δ) | +10° 50′ 21″ |
| Distance | 238 ± 11 ly (73.1 ± 3.5 pc) | |
| Spectral type | G6III | |
| Orbital elements | ||
| Semimajor axis | (a) | 2.6 AU |
| Eccentricity | (e) | 0.08 ± 0.01 |
| Orbital period | (P) | 993.3 ± 3.2 d |
| Longitude of periastron |
(ω) | 166.1 ± 6.5° |
| Time of periastron | (T0) | 2451672 ± 18 JD |
| Physical characteristics | ||
| Mass | (m) | >10.3 MJ |
| Discovery information | ||
| Discovery date | February 19, 2008 | |
| Discoverer(s) | Sato et al. | |
| Detection method | radial velocity | |
| Discovery status | Published | |
18 Delphini b (HD 199665 b) is a planet orbits the star 18 Delphini. It has a minimum mass of 10.3 MJ and a period of 993 days. This planet was discovered on February 19, 2008 by Sato.
