Star · K2III
TOI-1820
TOI-1820 is a giant star of spectral type K2III in the constellation Coma Berenices, 849.3 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Coma Berenices |
|---|---|
| Distance | 849.3 light-years (260.4 pc) |
| Apparent magnitude | magnitude 10.99 |
| Absolute magnitude | magnitude 3.91 |
| Spectral type | K2III |
| Surface temperature | 5,730 K |
| Luminosity | 1.97 L☉ |
| Radius | 1.51 R☉ |
| Mass | 1.04 M☉ |
| Age | 11.0 billion years |
| Metallicity [Fe/H] | 0.14 |
| Right ascension (J2000) | 12h 30m 44.7s |
| Declination (J2000) | +27° 27′ 08″ |
| Space velocity (relative to the Sun) | 78.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.99. Visible from the whole Northern Hemisphere and south to latitude 63° S. North of latitude 63° N it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1177. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 15 million years.
The Sun seen from there
From a planet around TOI-1820, the Sun would look like a star of magnitude 11.91, in the direction where our sky has the constellation Sculptor. It would be invisible to the naked eye.
Planets
- TOI-1820 b 4.86-day orbit · 12.8 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.