Star · K0V
Kepler-821
Kepler-821 is a main-sequence star of spectral type K0V in the constellation Lyra, 2,004 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Lyra |
|---|---|
| Distance | 2,004 light-years (614.6 pc) |
| Apparent magnitude | magnitude 15.15 |
| Absolute magnitude | magnitude 6.21 |
| Spectral type | K0V |
| Surface temperature | 5,190 K |
| Luminosity | 0.432 L☉ |
| Radius | 0.8 R☉ |
| Mass | 0.84 M☉ |
| Age | 4.8 billion years |
| Metallicity [Fe/H] | -0.03 |
| Right ascension (J2000) | 19h 02m 28.2s |
| Declination (J2000) | +39° 22′ 46″ |
| Space velocity (relative to the Sun) | 37.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 15.15. Visible from the whole Northern Hemisphere and south to latitude 51° S. North of latitude 51° 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 the year 22. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 36 million years.
The Sun seen from there
From a planet around Kepler-821, the Sun would look like a star of magnitude 13.77, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Planets
- Kepler-821 b 1.92-day orbit · 1.31 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.