Star · G2V
KMT-2021-BLG-2478L
KMT-2021-BLG-2478L is a main-sequence star of spectral type G2V in the constellation Sagittarius, 9,687 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Sagittarius |
|---|---|
| Distance | 9,687 light-years (2,970 pc) |
| Apparent magnitude | magnitude 29.57 |
| Absolute magnitude | magnitude 17.21 |
| Spectral type | G2V |
| Surface temperature | 5,780 K |
| Luminosity | 1.22 × 10⁻⁵ L☉ |
| Radius | 0.00348 R☉ |
| Mass | 0.2 M☉ (estimated) |
| Right ascension (J2000) | 17h 57m 14.2s |
| Declination (J2000) | −29° 06′ 07″ |
In the sky
A telescope is needed to see it: its apparent magnitude is 29.57. Visible from the whole Southern Hemisphere and north to latitude 61° N. South of latitude 61° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 9,687 years ago. At that time the first farming villages were being founded; there was no writing yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 172 million years.
The Sun seen from there
From a planet around KMT-2021-BLG-2478L, the Sun would look like a star of magnitude 17.19, in the direction where our sky has the constellation Auriga. It would be invisible to the naked eye.
Planets
- KMT-2021-BLG-2478L b 13.9 R⊕
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.