Star · M4V
2MASS J12171942-4830012
2MASS J12171942-4830012 is a main-sequence star of spectral type M4V in the constellation Centaurus, 231.6 light-years from the Sun.
| Constellation | Centaurus |
|---|---|
| Distance | 231.6 light-years (71.0 pc) |
| Apparent magnitude | magnitude 21.98 |
| Absolute magnitude | magnitude 17.72 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.28 × 10⁻⁴ L☉ |
| Radius | 0.0426 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 12h 17m 19.5s |
| Declination (J2000) | −48° 30′ 02″ |
| Space velocity (relative to the Sun) | 28.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.98. 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 March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1794. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.1 million years.
The Sun seen from there
From a planet around 2MASS J12171942-4830012, the Sun would look like a star of magnitude 9.09, in the direction where our sky has the constellation Cassiopeia. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 58691 10.3 light-years
- HIP 61517 15.2 light-years
- HIP 60658 15.7 light-years
- HIP 58507 16.0 light-years
- HIP 58384 17.4 light-years
- HIP 61328 17.6 light-years
- HIP 58582 18.6 light-years
- HIP 61260 19.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.