The NGTS-21 system contains 1 exoplanet. It is located 1933.75 light years away from the solar system.
| Mass | 0.72 solar masses |
| Radius | 0.86 solar radiae |
| Temperature | 4660 kelvin |
| Stellar Metallicity | -0.26 decimal exponent |
| Age | 10.02 billion years |
At more than 50 Earth masses, NGTS-21 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 750.075 Earth masses |
| Density | 1.250 grams per cubic centimeter |
| Radius | 14.908 Earth radiae |
| Semi-major Axis | 0.0236 AU |
| Eccentricity | 0 |
| Orbital Period | 1.543 days |
| Discovery Method | Transit |
| Discovery Facility | Paranal Observatory |
| Discovery Telescope | 20 cm Telescope |
| Discovery Instrument | Andor Ikon-L Camera |
| Discovery Date | 2022-10 |
| Reference | Alves et al. 2022 |