Star · A
KELT-17
KELT-17 is a main-sequence star of spectral type A in the constellation Cancer, 742.8 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Cancer |
|---|---|
| Distance | 742.8 light-years (227.8 pc) |
| Apparent magnitude | magnitude 9.27 |
| Absolute magnitude | magnitude 2.48 |
| Spectral type | A |
| Surface temperature | 7,450 K |
| Luminosity | 7.51 L☉ |
| Radius | 1.65 R☉ |
| Mass | 1.64 M☉ |
| Age | 0.7 billion years |
| Metallicity [Fe/H] | -0.02 |
| Right ascension (J2000) | 8h 22m 28.2s |
| Declination (J2000) | +13° 44′ 07″ |
| Space velocity (relative to the Sun) | 40.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.27. Visible from the whole Northern Hemisphere and south to latitude 76° S. North of latitude 76° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1283. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 13 million years.
The Sun seen from there
From a planet around KELT-17, the Sun would look like a star of magnitude 11.62, in the direction where our sky has the constellation Capricornus. It would be invisible to the naked eye.
Planets
- KELT-17 b 3.08-day orbit · 17.1 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.