Star · M3
TOI-2257
TOI-2257 is a main-sequence star of spectral type M3 in the constellation Camelopardalis, 188.7 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Camelopardalis |
|---|---|
| Distance | 188.7 light-years (57.9 pc) |
| Apparent magnitude | magnitude 15.24 |
| Absolute magnitude | magnitude 11.43 |
| Spectral type | M3 |
| Surface temperature | 3,430 K |
| Luminosity | 0.0136 L☉ |
| Radius | 0.313 R☉ |
| Mass | 0.328 M☉ |
| Metallicity [Fe/H] | -0.27 |
| Right ascension (J2000) | 12h 58m 57.5s |
| Declination (J2000) | +77° 39′ 42″ |
| Space velocity (relative to the Sun) | 13.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 15.24. Visible from the whole Northern Hemisphere and south to latitude 12° S. North of latitude 12° N it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1837. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.3 million years.
The Sun seen from there
From a planet around TOI-2257, the Sun would look like a star of magnitude 8.64, in the direction where our sky has the constellation Hydrus. It would be invisible to the naked eye.
Planets
- TOI-2257 b 35.2-day orbit · 2.19 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 66386 11.1 light-years
- HIP 58619 12.1 light-years
- HIP 57532 14.3 light-years
- HIP 58924 17.6 light-years
- HIP 57994 18.4 light-years
- HIP 56253 19.7 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.