Star · F9V
Kepler-187
Kepler-187 is a main-sequence star of spectral type F9V in the constellation Cygnus, 3,728 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Constellation | Cygnus |
|---|---|
| Distance | 3,728 light-years (1,143 pc) |
| Apparent magnitude | magnitude 14.30 |
| Absolute magnitude | magnitude 4.01 |
| Spectral type | F9V |
| Surface temperature | 6,110 K |
| Luminosity | 3.11 L☉ |
| Radius | 1.29 R☉ |
| Mass | 1.08 M☉ |
| Age | 6.5 billion years |
| Metallicity [Fe/H] | -0.04 |
| Right ascension (J2000) | 19h 59m 11.2s |
| Declination (J2000) | +44° 05′ 21″ |
| Space velocity (relative to the Sun) | 78.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.30. Visible from the whole Northern Hemisphere and south to latitude 46° S. North of latitude 46° 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 1703 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 66 million years.
The Sun seen from there
From a planet around Kepler-187, the Sun would look like a star of magnitude 15.12, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Planets
- Kepler-187 b 4.94-day orbit · 1.41 R⊕
- Kepler-187 c 10.6-day orbit · 2.67 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.