HAT-P-18 is 526 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this K2 star; the first was found in 2010 by transit (HATNet).
Fly there in 3DHAT-P-18 b goes round its star every 5.51 days, 16 times as often as Mercury goes round the Sun.
| Spectral type | K2 |
| Surface temperature | 4,870 K |
| Mass | 0.77 solar masses |
| Radius | 0.717 solar radii |
| Luminosity | 0.2598 times the Sun |
| Apparent magnitude | 12.597 |
| Age | about 12.4 billion years |
| Distance from the Sun | 526.4 light-years (161.4 parsecs) |
| Position (J2000) | RA 256.3464°, Dec 33.0123° |
| Constellation | Hercules |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HAT-P-18 b | 5.51 days | 0.0559 AU | 10.705 R⊕ | 55.525 M⊕ | Transit, 2010 |
Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.