The V0391 Peg system contains 1 exoplanet. It is located 3900.76 light years away from the solar system.
| Mass | 0.5 solar masses |
| Radius | 0.23 solar radiae |
| Temperature | 29300 kelvin |
| Stellar Metallicity | - decimal exponent |
| Age | 10 billion years |
At more than 50 Earth masses, V0391 Peg b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 1017.056 Earth masses |
| Density | 2.490 grams per cubic centimeter |
| Radius | 13.100 Earth radiae |
| Semi-major Axis | 1.7 AU |
| Eccentricity | 0 |
| Orbital Period | 1170.000 days |
| Discovery Method | Pulsation Timing Variations |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2007-09 |
| Reference | Silvotti et al. 2007 |