Star · M4V
SIMP J21503911-0412117
SIMP J21503911-0412117 is a main-sequence star of spectral type M4V in the constellation Aquarius, 241.4 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 241.4 light-years (74.0 pc) |
| Apparent magnitude | magnitude 21.64 |
| Absolute magnitude | magnitude 17.29 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.90 × 10⁻⁴ L☉ |
| Radius | 0.0519 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 21h 50m 39.1s |
| Declination (J2000) | −4° 12′ 12″ |
| Space velocity (relative to the Sun) | 29.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.64. Visible from the whole Southern Hemisphere and north to latitude 86° N. 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 1785. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.3 million years.
The Sun seen from there
From a planet around SIMP J21503911-0412117, the Sun would look like a star of magnitude 9.18, in the direction where our sky has the constellation Sextans. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 108144 7.11 light-years
- HIP 107564 9.05 light-years
- HIP 107307 13.3 light-years
- HIP 108748 17.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.