HATS-40 is 4,378 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this 6,460 K star; the first was found in 2018 by transit (HATSouth).
Fly there in 3DHATS-40 b goes round its star every 3.26 days, 27 times as often as Mercury goes round the Sun.
| Surface temperature | 6,460 K |
| Mass | 1.561 solar masses |
| Radius | 2.26 solar radii |
| Luminosity | 8 times the Sun |
| Apparent magnitude | 13.478 |
| Age | about 2.07 billion years |
| Distance from the Sun | 4378.0 light-years (1342.3 parsecs) |
| Position (J2000) | RA 100.5712°, Dec -29.7768° |
| Constellation | Canis Major |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HATS-40 b | 3.26 days | 0.0500 AU | 17.71 R⊕ | 505.35 M⊕ | Transit, 2018 |
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 6,460 K, 8.0 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 2.58 to 4.49 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 4,378 years ago, around 2400 BC.