PLANETARY SYSTEM
HAT-P-21
1 confirmed planet in our catalogue, 904.4 light-years from Earth.
Ordered by orbital period where known. Diagram is illustrative; distances and planet sizes are not to scale.
| World / host star | Type | Distance | Year length | Discovery |
|---|---|---|---|---|
| HAT-P-21 b ↗HAT-P-21 | Gas giant | 904.4 ly | 4.124 days | 2010Transit |
System discovery history
2010 · HAT-P-21 b · Transit