Star · M4V
SIMP J10390822+2440446
SIMP J10390822+2440446 is a main-sequence star of spectral type M4V in the constellation Leo Minor, 130.5 light-years from the Sun.
| Constellation | Leo Minor |
|---|---|
| Distance | 130.5 light-years (40.0 pc) |
| Apparent magnitude | magnitude 22.26 |
| Absolute magnitude | magnitude 19.25 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 3.13 × 10⁻⁵ L☉ |
| Radius | 0.0211 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 10h 39m 08.2s |
| Declination (J2000) | +24° 40′ 44″ |
| Space velocity (relative to the Sun) | 19.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.26. Visible from the whole Northern Hemisphere and south to latitude 65° S. North of latitude 65° N 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 1896. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.3 million years.
The Sun seen from there
From a planet around SIMP J10390822+2440446, the Sun would look like a star of magnitude 7.84, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 52008 8.34 light-years
- HIP 51550 8.77 light-years
- HIP 53471 11.7 light-years
- HIP 53747 13.8 light-years
- HIP 50355 14.1 light-years
- HIP 52051 14.2 light-years
- Algieba 14.9 light-years
- HIP 51874 16.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.