HAT-P-9 is 1,485 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this F7 star; the first was found in 2008 by transit (HATNet).
Fly there in 3DHAT-P-9 b goes round its star every 3.92 days, 22 times as often as Mercury goes round the Sun.
| Spectral type | F7 |
| Surface temperature | 6,350 K |
| Mass | 1.281 solar masses |
| Radius | 1.338 solar radii |
| Luminosity | 2.62 times the Sun |
| Apparent magnitude | 12.344 |
| Age | about 1.6 billion years |
| Distance from the Sun | 1484.7 light-years (455.2 parsecs) |
| Position (J2000) | RA 110.1685°, Dec 37.1406° |
| Constellation | Auriga |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HAT-P-9 b | 3.92 days | 0.0529 AU | 15.614 R⊕ | 238.05 M⊕ | Transit, 2008 |
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.
For a star of 6,350 K, 2.6 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 1.49 to 2.59 AU. None of its known planets orbits inside it. The zone says how much starlight arrives, not whether a planet has water or air. The edges follow Kopparapu et al. (2014), as the 3D view draws them.
The light you see left 1,485 years ago, around AD 540.