Star · F6V
Kepler-642
Kepler-642 is a main-sequence star of spectral type F6V in the constellation Cygnus, 2,549 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Cygnus |
|---|---|
| Distance | 2,549 light-years (781.6 pc) |
| Apparent magnitude | magnitude 13.34 |
| Absolute magnitude | magnitude 3.88 |
| Spectral type | F6V |
| Surface temperature | 6,570 K |
| Luminosity | 2.5 L☉ |
| Radius | 1.66 R☉ |
| Mass | 1.4 M☉ |
| Age | 2.0 billion years |
| Metallicity [Fe/H] | 0.06 |
| Right ascension (J2000) | 19h 35m 20.3s |
| Declination (J2000) | +42° 37′ 30″ |
| Space velocity (relative to the Sun) | 7.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.34. Visible from the whole Northern Hemisphere and south to latitude 47° S. North of latitude 47° 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 524 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 45 million years.
The Sun seen from there
From a planet around Kepler-642, the Sun would look like a star of magnitude 14.29, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Planets
- Kepler-642 b 4.42-day orbit · 2.9 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.