Star · K5V
TOI-139
TOI-139 is a main-sequence star of spectral type K5V in the constellation Piscis Austrinus, 138.4 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 110692 |
|---|---|
| Constellation | Piscis Austrinus |
| Distance | 138.4 light-years (42.4 pc) |
| Apparent magnitude | magnitude 10.55 |
| Absolute magnitude | magnitude 7.41 |
| Spectral type | K5V |
| Surface temperature | 4,570 K |
| Luminosity | 0.167 L☉ |
| Radius | 0.701 R☉ |
| Mass | 0.69 M☉ |
| Metallicity [Fe/H] | -0.24 |
| Right ascension (J2000) | 22h 25m 36.5s |
| Declination (J2000) | −34° 54′ 34″ |
| Space velocity (relative to the Sun) | 12.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.55. Visible from the whole Southern Hemisphere and north to latitude 55° N. South of latitude 55° S it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1888. 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-139, the Sun would look like a star of magnitude 7.97, in the direction where our sky has the constellation Leo Minor. It would be invisible to the naked eye.
Planets
- TOI-139 b 11.1-day orbit · 2.46 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 2MASS J22351658-3844154 10.9 light-years
- β PsA 11.7 light-years
- HIP 111880 11.8 light-years
- HIP 110156 13.5 light-years
- 2MASS J22444905-3045535 14.0 light-years
- HIP 109468 16.1 light-years
- HD 210193 17.0 light-years
- HIP 110483 17.6 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.