The KELT-4 A system contains 1 exoplanet. It is located 711.18 light years away from the solar system.
| Mass | 1.2 solar masses | 
| Radius | 1.6 solar radiae | 
| Temperature | 6206 kelvin | 
| Stellar Metallicity | -0.116 decimal exponent | 
| Age | 4.44 billion years | 
At more than 50 Earth masses, KELT-4 A b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 286.683 Earth masses | 
| Density | 0.228 grams per cubic centimeter | 
| Radius | 19.044 Earth radiae | 
| Semi-major Axis | 0.04317 AU | 
| Eccentricity | 0 | 
| Orbital Period | 2.990 days | 
| Discovery Method | Transit | 
| Discovery Facility | KELT | 
| Discovery Telescope | Mamiya 645 80mm f/1.9 | 
| Discovery Instrument | Apogee 4K CCD Sensor | 
| Discovery Date | 2016-02 | 
| Reference | Eastman et al. 2016 |