Star · M4V
2MASS J10212570-2830427
2MASS J10212570-2830427 is a main-sequence star of spectral type M4V in the constellation Hydra, 159.8 light-years from the Sun.
| Constellation | Hydra |
|---|---|
| Distance | 159.8 light-years (49.0 pc) |
| Apparent magnitude | magnitude 22.41 |
| Absolute magnitude | magnitude 18.96 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 4.10 × 10⁻⁵ L☉ |
| Radius | 0.0241 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 10h 21m 25.7s |
| Declination (J2000) | −28° 30′ 43″ |
| Space velocity (relative to the Sun) | 20.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.41. 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 February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1866. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.8 million years.
The Sun seen from there
From a planet around 2MASS J10212570-2830427, the Sun would look like a star of magnitude 8.28, in the direction where our sky has the constellation Pegasus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 50176 11.5 light-years
- HIP 49821 11.6 light-years
- HIP 50681 13.6 light-years
- HIP 51980 14.4 light-years
- HIP 52091 14.7 light-years
- HIP 49285 15.9 light-years
- HIP 52045 18.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.