Star · M4V
SIMP J22552905-0725440
SIMP J22552905-0725440 is a main-sequence star of spectral type M4V in the constellation Aquarius, 257.7 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 257.7 light-years (79.0 pc) |
| Apparent magnitude | magnitude 21.58 |
| Absolute magnitude | magnitude 17.09 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 2.29 × 10⁻⁴ L☉ |
| Radius | 0.0569 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 22h 55m 29.1s |
| Declination (J2000) | −7° 25′ 44″ |
| Space velocity (relative to the Sun) | 171.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.58. Visible from the whole Southern Hemisphere and north to latitude 83° N. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1768. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.6 million years.
The Sun seen from there
From a planet around SIMP J22552905-0725440, the Sun would look like a star of magnitude 9.32, in the direction where our sky has the constellation Leo. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 113926 15.0 light-years
- HIP 112621 15.6 light-years
- HIP 111873 18.0 light-years
- HIP 113537 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.