Star · M4V
2MASS J21513839-4853542
2MASS J21513839-4853542 is a main-sequence star of spectral type M4V in the constellation Grus, 56.8 light-years from the Sun.
| Constellation | Grus |
|---|---|
| Distance | 56.8 light-years (17.4 pc) |
| Apparent magnitude | magnitude 23.23 |
| Absolute magnitude | magnitude 22.03 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 2.43 × 10⁻⁶ L☉ |
| Radius | 0.00586 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 21h 51m 38.4s |
| Declination (J2000) | −48° 53′ 54″ |
| Space velocity (relative to the Sun) | 38.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 23.23. Visible from the whole Southern Hemisphere and north to latitude 41° N. South of latitude 41° 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 1969. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.0 million years.
The Sun seen from there
From a planet around 2MASS J21513839-4853542, the Sun would look like a star of magnitude 6.03, in the direction where our sky has the constellation Ursa Major. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISE J221140.52-475826.5 6.05 light-years
- WISEA J214155.85-511853.1 6.17 light-years
- Gl 838 6.21 light-years
- Gl 838.6 6.37 light-years
- Gl 841A 8.54 light-years
- Gl 841B 8.55 light-years
- Gl 833 8.89 light-years
- GJ 9780 9.42 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.