The HAT-P-34 system contains 1 exoplanet. It is located 813.19 light years away from the solar system.
| Mass | 1.39 solar masses | 
| Radius | 1.53 solar radiae | 
| Temperature | 6442 kelvin | 
| Stellar Metallicity | 0.22 decimal exponent | 
| Age | 1.7 billion years | 
At more than 50 Earth masses, HAT-P-34 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 1058.374 Earth masses | 
| Density | 2.500 grams per cubic centimeter | 
| Radius | 13.417 Earth radiae | 
| Semi-major Axis | 0.06774 AU | 
| Eccentricity | 0.432 | 
| Orbital Period | 5.453 days | 
| Discovery Method | Transit | 
| Discovery Facility | HATNet | 
| Discovery Telescope | Canon 200mm f/1.8L | 
| Discovery Instrument | 2K CCD Sensor | 
| Discovery Date | 2012-07 | 
| Reference | Bakos et al. 2012 |