Star · G5 V
HAT-P-22
HAT-P-22 is a main-sequence star of spectral type G5 V in the constellation Ursa Major, 265.8 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Ursa Major |
|---|---|
| Distance | 265.8 light-years (81.5 pc) |
| Apparent magnitude | magnitude 9.86 |
| Absolute magnitude | magnitude 5.30 |
| Spectral type | G5 V |
| Surface temperature | 5,300 K |
| Luminosity | 0.769 L☉ |
| Radius | 1.11 R☉ |
| Mass | 1.13 M☉ |
| Age | 12.4 billion years |
| Metallicity [Fe/H] | 0.24 |
| Right ascension (J2000) | 10h 22m 43.6s |
| Declination (J2000) | +50° 07′ 42″ |
| Space velocity (relative to the Sun) | 36.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.86. Visible from the whole Northern Hemisphere and south to latitude 40° S. North of latitude 40° N it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1760. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.7 million years.
The Sun seen from there
From a planet around HAT-P-22, the Sun would look like a star of magnitude 9.39, in the direction where our sky has the constellation Grus. It would be invisible to the naked eye.
Planets
- HAT-P-22 b 3.21-day orbit · 12.9 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 50783 6.24 light-years
- HIP 51062 14.6 light-years
- HIP 51163 15.5 light-years
- SDSS J103115.68+525853.5 16.9 light-years
- HIP 50362 17.4 light-years
- SDSS J103143.09+524558.7 17.9 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.