Star · M0 V
TOI-198
TOI-198 is a main-sequence star of spectral type M0 V in the constellation Sculptor, 77.5 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | Gl 7 · HIP 738 |
|---|---|
| Constellation | Sculptor |
| Distance | 77.5 light-years (23.8 pc) |
| Apparent magnitude | magnitude 11.73 |
| Absolute magnitude | magnitude 9.85 |
| Spectral type | M0 V |
| Surface temperature | 3,800 K |
| Luminosity | 0.0328 L☉ |
| Radius | 0.418 R☉ |
| Mass | 0.417 M☉ |
| Age | 1.0 billion years |
| Metallicity [Fe/H] | -0.66 |
| Right ascension (J2000) | 0h 09m 04.4s |
| Declination (J2000) | −27° 07′ 19″ |
| Space velocity (relative to the Sun) | 81.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.73. Visible from the whole Southern Hemisphere and north to latitude 63° N. South of latitude 63° S it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1948. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around TOI-198, the Sun would look like a star of magnitude 6.71, in the direction where our sky has the constellation Coma Berenices. It would be invisible to the naked eye.
Planets
- TOI-198 b 10.2-day orbit · 1.36 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.