Star · K3
Kepler-91
Kepler-91 is a giant star of spectral type K3 in the constellation Lyra, 4,223 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Lyra |
|---|---|
| Distance | 4,223 light-years (1,295 pc) |
| Apparent magnitude | magnitude 12.71 |
| Absolute magnitude | magnitude 2.15 |
| Spectral type | K3 |
| Surface temperature | 4,550 K |
| Luminosity | 16.8 L☉ |
| Radius | 6.3 R☉ |
| Mass | 1.31 M☉ |
| Age | 4.5 billion years |
| Metallicity [Fe/H] | 0.11 |
| Right ascension (J2000) | 19h 02m 41.5s |
| Declination (J2000) | +44° 07′ 00″ |
| Space velocity (relative to the Sun) | 26.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.71. 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 4,223 years ago. At that time the first farming villages were being founded; there was no writing yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 75 million years.
The Sun seen from there
From a planet around Kepler-91, the Sun would look like a star of magnitude 15.39, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Planets
- Kepler-91 b 6.25-day orbit · 15.3 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.