Star · M2.0 V
TOI-1243
TOI-1243 is a main-sequence star of spectral type M2.0 V in the constellation Ursa Major, 140.7 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Ursa Major |
|---|---|
| Distance | 140.7 light-years (43.1 pc) |
| Apparent magnitude | magnitude 13.38 |
| Absolute magnitude | magnitude 10.21 |
| Spectral type | M2.0 V |
| Surface temperature | 3,520 K |
| Luminosity | 0.0359 L☉ |
| Radius | 0.511 R☉ |
| Mass | 0.515 M☉ |
| Metallicity [Fe/H] | -0.20 |
| Right ascension (J2000) | 9h 02m 55.8s |
| Declination (J2000) | +71° 38′ 11″ |
| Space velocity (relative to the Sun) | 35.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.38. Visible from the whole Northern Hemisphere and south to latitude 18° S. North of latitude 18° N it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1885. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
The Sun seen from there
From a planet around TOI-1243, the Sun would look like a star of magnitude 8.00, in the direction where our sky has the constellation Pavo. It would be invisible to the naked eye.
Planets
- TOI-1243 b 4.66-day orbit · 2.33 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISEA J084329.01+694709.8 6.71 light-years
- HIP 42279 14.4 light-years
- HIP 47387 14.7 light-years
- HIP 39822 17.3 light-years
- TOI-1235 18.1 light-years
- HIP 52063 19.7 light-years
- 2 UMa 19.9 light-years
- HIP 44610 19.9 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.