Star · K1III
Kepler-643
Kepler-643 is a giant star of spectral type K1III in the constellation Lyra, 3,469 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Lyra |
|---|---|
| Distance | 3,469 light-years (1,064 pc) |
| Apparent magnitude | magnitude 13.99 |
| Absolute magnitude | magnitude 3.86 |
| Spectral type | K1III |
| Surface temperature | 4,910 K |
| Luminosity | 3.01 L☉ |
| Radius | 2.52 R☉ |
| Mass | 1 M☉ |
| Age | 12.0 billion years |
| Metallicity [Fe/H] | 0.13 |
| Right ascension (J2000) | 19h 21m 18.5s |
| Declination (J2000) | +42° 53′ 54″ |
| Space velocity (relative to the Sun) | 73.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.99. 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 1444 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 62 million years.
The Sun seen from there
From a planet around Kepler-643, the Sun would look like a star of magnitude 14.96, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Planets
- Kepler-643 b 16.3-day orbit · 10.2 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.