Star · F8 V
TrES-4
TrES-4 is a main-sequence star of spectral type F8 V in the constellation Hercules, 1,657 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Hercules |
|---|---|
| Distance | 1,657 light-years (508.0 pc) |
| Apparent magnitude | magnitude 11.98 |
| Absolute magnitude | magnitude 3.45 |
| Spectral type | F8 V |
| Surface temperature | 6,200 K |
| Luminosity | 5.32 L☉ |
| Radius | 1.66 R☉ |
| Mass | 1.08 M☉ |
| Age | 2.2 billion years |
| Metallicity [Fe/H] | 0.14 |
| Right ascension (J2000) | 17h 53m 13.1s |
| Declination (J2000) | +37° 12′ 42″ |
| Space velocity (relative to the Sun) | 54.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.98. Visible from the whole Northern Hemisphere and south to latitude 53° S. North of latitude 53° 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 369. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 29 million years.
The Sun seen from there
From a planet around TrES-4, the Sun would look like a star of magnitude 13.36, in the direction where our sky has the constellation Columba. It would be invisible to the naked eye.
Planets
- TrES-4 b 3.55-day orbit · 18 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.