Star · K1V
Kepler-861
Kepler-861 is a main-sequence star of spectral type K1V in the constellation Cygnus, 2,773 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Cygnus |
|---|---|
| Distance | 2,773 light-years (850.3 pc) |
| Apparent magnitude | magnitude 15.99 |
| Absolute magnitude | magnitude 6.34 |
| Spectral type | K1V |
| Surface temperature | 5,050 K |
| Luminosity | 0.374 L☉ |
| Radius | 0.78 R☉ |
| Mass | 0.82 M☉ |
| Age | 4.5 billion years |
| Metallicity [Fe/H] | 0.01 |
| Right ascension (J2000) | 19h 29m 25.0s |
| Declination (J2000) | +46° 13′ 34″ |
| Space velocity (relative to the Sun) | 35.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 15.99. Visible from the whole Northern Hemisphere and south to latitude 44° S. North of latitude 44° 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 748 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 49 million years.
The Sun seen from there
From a planet around Kepler-861, the Sun would look like a star of magnitude 14.48, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Planets
- Kepler-861 b 3.95-day orbit · 2.28 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.