HAT-P-1 is 519 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this G0 V star; the first was found in 2006 by transit (HATNet).
Fly there in 3DHAT-P-1 b goes round its star every 4.47 days, 20 times as often as Mercury goes round the Sun.
HAT-P-1 is one of 2 stars in its system: the other is drawn where the Washington Double Star Catalog measures it on the sky.
| Spectral type | G0 V |
| Surface temperature | 5,980 K |
| Mass | 1.151 solar masses |
| Radius | 1.174 solar radii |
| Luminosity | 1.677 times the Sun |
| Apparent magnitude | 9.827 |
| Age | about 3.6 billion years |
| Distance from the Sun | 518.5 light-years (159.0 parsecs) |
| Position (J2000) | RA 344.4454°, Dec 38.6749° |
| Constellation | Lacerta |
HAT-P-1 A is a F8 star of magnitude 9.81, moving through space with it. In 2016 it was 11.4″ from HAT-P-1, at position angle 253° (Washington Double Star Catalog, 22578+3840 HJ 1832): 1,812 AU on the sky at this distance. The true distance can only be larger.
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HAT-P-1 b | 4.47 days | 0.0556 AU | 14.785 R⊕ | 166.86 M⊕ | Transit, 2006 |
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.