Star · G0V
TOI-640
TOI-640 is a main-sequence star of spectral type G0V in the constellation Columba, 1,106 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Columba |
|---|---|
| Distance | 1,106 light-years (339.1 pc) |
| Apparent magnitude | magnitude 10.57 |
| Absolute magnitude | magnitude 2.92 |
| Spectral type | G0V |
| Surface temperature | 6,460 K |
| Luminosity | 6.83 L☉ |
| Radius | 2.08 R☉ |
| Mass | 1.54 M☉ |
| Age | 2.0 billion years |
| Metallicity [Fe/H] | 0.07 |
| Right ascension (J2000) | 6h 38m 56.3s |
| Declination (J2000) | −36° 38′ 46″ |
| Space velocity (relative to the Sun) | 41.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.57. Visible from the whole Southern Hemisphere and north to latitude 53° N. South of latitude 53° S it never sets. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 920. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 20 million years.
The Sun seen from there
From a planet around TOI-640, the Sun would look like a star of magnitude 12.48, in the direction where our sky has the constellation Lyra. It would be invisible to the naked eye.
Planets
- TOI-640 b 5-day orbit · 19.3 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.