Star · M4V
2MASSW J1123556+412228
2MASSW J1123556+412228 is a main-sequence star of spectral type M4V in the constellation Ursa Major, 131.4 light-years from the Sun.
| Constellation | Ursa Major |
|---|---|
| Distance | 131.4 light-years (40.3 pc) |
| Apparent magnitude | magnitude 21.57 |
| Absolute magnitude | magnitude 18.54 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 6.01 × 10⁻⁵ L☉ |
| Radius | 0.0292 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 11h 23m 55.6s |
| Declination (J2000) | +41° 22′ 28″ |
| Space velocity (relative to the Sun) | 25.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.57. Visible from the whole Northern Hemisphere and south to latitude 49° S. North of latitude 49° N 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 1895. 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 2MASSW J1123556+412228, the Sun would look like a star of magnitude 7.86, in the direction where our sky has the constellation Grus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 55761 3.41 light-years
- HIP 54536 6.36 light-years
- HIP 56837 11.2 light-years
- HIP 56229 12.7 light-years
- ψ UMa 13.2 light-years
- HIP 54614 13.6 light-years
- HIP 55192 13.9 light-years
- 2MASSI J1117369+360936 14.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.