Star · G4
HAT-P-13
HAT-P-13 is a main-sequence star of spectral type G4 in the constellation Ursa Major, 800.4 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Constellation | Ursa Major |
|---|---|
| Distance | 800.4 light-years (245.4 pc) |
| Apparent magnitude | magnitude 10.50 |
| Absolute magnitude | magnitude 3.55 |
| Spectral type | G4 |
| Surface temperature | 5,650 K |
| Luminosity | 2.22 L☉ |
| Radius | 1.76 R☉ |
| Mass | 1.32 M☉ |
| Age | 5.0 billion years |
| Metallicity [Fe/H] | 0.46 |
| Right ascension (J2000) | 8h 39m 31.8s |
| Declination (J2000) | +47° 21′ 07″ |
| Space velocity (relative to the Sun) | 44.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.50. Visible from the whole Northern Hemisphere and south to latitude 43° S. North of latitude 43° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1226. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 14 million years.
The Sun seen from there
From a planet around HAT-P-13, the Sun would look like a star of magnitude 11.78, in the direction where our sky has the constellation Indus. It would be invisible to the naked eye.
Planets
- HAT-P-13 b 2.92-day orbit · 14.3 R⊕
- HAT-P-13 c 446-day orbit · 12.3 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.