Star · F6 V
HAT-P-7
HAT-P-7 is a main-sequence star of spectral type F6 V in the constellation Cygnus, 1,088 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Cygnus |
|---|---|
| Distance | 1,088 light-years (333.4 pc) |
| Apparent magnitude | magnitude 10.54 |
| Absolute magnitude | magnitude 2.92 |
| Spectral type | F6 V |
| Surface temperature | 6,390 K |
| Luminosity | 6.52 L☉ |
| Radius | 2 R☉ |
| Mass | 1.56 M☉ |
| Age | 1.8 billion years |
| Metallicity [Fe/H] | 0.26 |
| Right ascension (J2000) | 19h 28m 59.4s |
| Declination (J2000) | +47° 58′ 10″ |
| Space velocity (relative to the Sun) | 33.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.54. Visible from the whole Northern Hemisphere and south to latitude 42° S. North of latitude 42° N it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 938. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 19 million years.
The Sun seen from there
From a planet around HAT-P-7, the Sun would look like a star of magnitude 12.45, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Planets
- HAT-P-7 b 2.2-day orbit · 16.9 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.