Star · G2V
HAT-P-55
HAT-P-55 is a main-sequence star of spectral type G2V in the constellation Hercules, 1,668 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Hercules |
|---|---|
| Distance | 1,668 light-years (511.4 pc) |
| Apparent magnitude | magnitude 13.20 |
| Absolute magnitude | magnitude 4.66 |
| Spectral type | G2V |
| Surface temperature | 5,800 K |
| Luminosity | 1.25 L☉ |
| Radius | 1.11 R☉ |
| Mass | 1.03 M☉ |
| Age | 5.3 billion years |
| Metallicity [Fe/H] | 0.00 |
| Right ascension (J2000) | 17h 37m 05.6s |
| Declination (J2000) | +25° 43′ 52″ |
| Space velocity (relative to the Sun) | 26.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.20. Visible from the whole Northern Hemisphere and south to latitude 64° S. North of latitude 64° N it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 358. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 30 million years.
The Sun seen from there
From a planet around HAT-P-55, the Sun would look like a star of magnitude 13.37, in the direction where our sky has the constellation Lepus. It would be invisible to the naked eye.
Planets
- HAT-P-55 b 3.59-day orbit · 14.8 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.