Star · M4V
SIMP J10391406-1904471
SIMP J10391406-1904471 is a main-sequence star of spectral type M4V in the constellation Hydra, 182.6 light-years from the Sun.
| Constellation | Hydra |
|---|---|
| Distance | 182.6 light-years (56.0 pc) |
| Apparent magnitude | magnitude 21.72 |
| Absolute magnitude | magnitude 17.98 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.01 × 10⁻⁴ L☉ |
| Radius | 0.0378 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 10h 39m 14.1s |
| Declination (J2000) | −19° 04′ 47″ |
| Space velocity (relative to the Sun) | 43.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.72. Visible from the whole Southern Hemisphere and north to latitude 71° N. South of latitude 71° 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 1843. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.2 million years.
The Sun seen from there
From a planet around SIMP J10391406-1904471, the Sun would look like a star of magnitude 8.57, 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 52737 8.14 light-years
- HIP 51372 8.78 light-years
- 2MASS J10513331-1916530 13.0 light-years
- HIP 52220 14.5 light-years
- HIP 51237 16.4 light-years
- HIP 51018 16.7 light-years
- HIP 51860 17.0 light-years
- HIP 51258 17.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.