Star · M3V
2MASS J21574904-5534420
2MASS J21574904-5534420 is a main-sequence star of spectral type M3V in the constellation Indus, 111.4 light-years from the Sun.
| Constellation | Indus |
|---|---|
| Distance | 111.4 light-years (34.1 pc) |
| Apparent magnitude | magnitude 21.55 |
| Absolute magnitude | magnitude 18.88 |
| Spectral type | M3V |
| Surface temperature | 3,130 K |
| Luminosity | 2.95 × 10⁻⁵ L☉ |
| Radius | 0.0185 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 21h 57m 49.1s |
| Declination (J2000) | −55° 34′ 42″ |
| Space velocity (relative to the Sun) | 8.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.55. Visible from the whole Southern Hemisphere and north to latitude 34° N. South of latitude 34° 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 1915. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.0 million years.
The Sun seen from there
From a planet around 2MASS J21574904-5534420, the Sun would look like a star of magnitude 7.50, in the direction where our sky has the constellation Ursa Major. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 107620 6.49 light-years
- HIP 108736 8.88 light-years
- WISEAR J220746.67-503631.7 10.1 light-years
- HIP 107865 10.5 light-years
- HIP 106704 10.9 light-years
- HIP 108216 11.5 light-years
- Gl 863.3 13.4 light-years
- HIP 104526 13.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.