Star · M0III
TOI-1803
TOI-1803 is a giant star of spectral type M0III in the constellation Ursa Major, 388.2 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Constellation | Ursa Major |
|---|---|
| Distance | 388.2 light-years (119.0 pc) |
| Apparent magnitude | magnitude 12.03 |
| Absolute magnitude | magnitude 6.65 |
| Spectral type | M0III |
| Surface temperature | 4,690 K |
| Luminosity | 0.222 L☉ |
| Radius | 0.715 R☉ |
| Mass | 0.756 M☉ |
| Age | 1.4 billion years |
| Metallicity [Fe/H] | 0.01 |
| Right ascension (J2000) | 11h 52m 11.2s |
| Declination (J2000) | +35° 10′ 18″ |
| Space velocity (relative to the Sun) | 48.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.03. Visible from the whole Northern Hemisphere and south to latitude 55° S. North of latitude 55° 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 1638. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.9 million years.
The Sun seen from there
From a planet around TOI-1803, the Sun would look like a star of magnitude 10.21, in the direction where our sky has the constellation Sculptor. It would be invisible to the naked eye.
Planets
- TOI-1803 b 6.29-day orbit · 2.99 R⊕
- TOI-1803 c 12.9-day orbit · 4.29 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.