The 18 Del system contains 1 exoplanet. It is located 248.60 light years away from the solar system.
| Mass | 2.3 solar masses |
| Radius | 8.5 solar radiae |
| Temperature | 4979 kelvin |
| Stellar Metallicity | -0.052 decimal exponent |
| Age | 1.1 billion years |
At more than 50 Earth masses, 18 Del b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 3273.500 Earth masses |
| Density | 9.210 grams per cubic centimeter |
| Radius | 12.500 Earth radiae |
| Semi-major Axis | 2.6 AU |
| Eccentricity | 0.08 |
| Orbital Period | 993.300 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Okayama Astrophysical Observatory |
| Discovery Telescope | 1.88 m Telescope |
| Discovery Instrument | HIDES Echelle Spectrograph |
| Discovery Date | 2008-06 |
| Reference | Sato et al. 2008 |