Star · G9 IV
TOI-157
TOI-157 is a main-sequence star of spectral type G9 IV in the constellation Mensa, 1,160 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Mensa |
|---|---|
| Distance | 1,160 light-years (355.7 pc) |
| Apparent magnitude | magnitude 12.73 |
| Absolute magnitude | magnitude 4.97 |
| Spectral type | G9 IV |
| Surface temperature | 5,400 K |
| Luminosity | 1.05 L☉ |
| Radius | 1.17 R☉ |
| Mass | 0.948 M☉ |
| Age | 12.8 billion years |
| Metallicity [Fe/H] | 0.24 |
| Right ascension (J2000) | 4h 54m 48.3s |
| Declination (J2000) | −76° 40′ 50″ |
| Space velocity (relative to the Sun) | 37.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.73. Visible from the whole Southern Hemisphere and north to latitude 13° N. South of latitude 13° S it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 866. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 21 million years.
The Sun seen from there
From a planet around TOI-157, the Sun would look like a star of magnitude 12.59, in the direction where our sky has the constellation Ursa Minor. It would be invisible to the naked eye.
Planets
- TOI-157 b 2.08-day orbit · 14.4 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.