Star · A2 V
KELT-20
KELT-20 is a main-sequence star of spectral type A2 V in the constellation Cygnus, 446.8 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 96618 |
|---|---|
| Constellation | Cygnus |
| Distance | 446.8 light-years (137.0 pc) |
| Apparent magnitude | magnitude 7.59 |
| Absolute magnitude | magnitude 1.91 |
| Spectral type | A2 V |
| Surface temperature | 8,720 K |
| Luminosity | 12.7 L☉ |
| Radius | 1.57 R☉ |
| Mass | 1.76 M☉ |
| Age | 0.6 billion years |
| Metallicity [Fe/H] | -0.29 |
| Right ascension (J2000) | 19h 38m 38.7s |
| Declination (J2000) | +31° 13′ 09″ |
| Space velocity (relative to the Sun) | 27.2 km/s |
In the sky
Too faint for the naked eye (magnitude 7.59); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 59° S. North of latitude 59° 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 1579. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 7.9 million years.
The Sun seen from there
From a planet around KELT-20, the Sun would look like a star of magnitude 10.51, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Planets
- KELT-20 b 3.47-day orbit · 19.5 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.