Cosmic Scale
HAT-P-67b
Inflated hot Saturn · 1,200 light-years
How big is HAT-P-67b?
HAT-P-67b is about 299,200 km across.
See HAT-P-67b in 3D, at true scale
HAT-P-67b is one of the largest planets known and one of the least dense — a Saturn-mass world blown up to more than twice Jupiter's width, trailing a vast cloud of escaping helium.
At a glance
| Diameter | 299,200 km |
|---|---|
| Mass | 8.54 × 10²⁶ kg |
| Diameter compared with Earth | 23.5 × Earth |
| Distance | About 1,200 light-years |
| Size | 2.1× Jupiter |
| Year | 4.8 days |
Good to know
- In 2023 astronomers measured helium streaming away from it in enormous tails.
- It is losing hundreds of thousands of tonnes of gas every second.
- Its density is roughly that of candy floss.
- Next smaller: Barnard's Star · 260,200 km
- Next larger: Epsilon Eridani · 1,023,000 km