HR 8799 is 135 light-years from the Sun. The NASA Exoplanet Archive lists 4 planets around this A5 V star; the first was found in 2008 by imaging (W. M. Keck Observatory).
Fly there in 3DHR 8799 e was photographed directly: it is one of the few exoplanets seen as its own point of light rather than inferred from its star.
| Spectral type | A5 V |
| Surface temperature | 7,205 K |
| Mass | 1.5 solar masses |
| Radius | 1.49338 solar radii |
| Luminosity | 4.92 times the Sun |
| Apparent magnitude | 5.98 |
| Age | about 0.06 billion years |
| Distance from the Sun | 134.5 light-years (41.2 parsecs) |
| Position (J2000) | RA 346.8701°, Dec 21.1340° |
| Constellation | Pegasus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| HR 8799 e | 57.0 years | 16.400 AU | 13.115 R⊕ | 3178.3 M⊕ | Imaging, 2010 |
| HR 8799 d | 101.3 years | 24.000 AU | 13 R⊕ | 3000 M⊕ | Imaging, 2008 |
| HR 8799 c | 188.9 years | 38.000 AU | 13 R⊕ | 3000 M⊕ | Imaging, 2008 |
| HR 8799 b | 465.4 years | 68.000 AU | 13 R⊕ | 2000 M⊕ | Imaging, 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.