Star · M4V
USco J155150.2-213457
USco J155150.2-213457 is a main-sequence star of spectral type M4V in the constellation Scorpius, 254.4 light-years from the Sun.
| Constellation | Scorpius |
|---|---|
| Distance | 254.4 light-years (78.0 pc) |
| Apparent magnitude | magnitude 23.63 |
| Absolute magnitude | magnitude 19.17 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 3.37 × 10⁻⁵ L☉ |
| Radius | 0.0219 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 15h 51m 50.2s |
| Declination (J2000) | −21° 34′ 58″ |
| Space velocity (relative to the Sun) | 8.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 23.63. Visible from the whole Southern Hemisphere and north to latitude 68° N. South of latitude 68° S it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1772. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.5 million years.
The Sun seen from there
From a planet around USco J155150.2-213457, the Sun would look like a star of magnitude 9.29, in the direction where our sky has the constellation Taurus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 77543 3.24 light-years
- HIP 77000 9.74 light-years
- HIP 78123 11.5 light-years
- PSO J239.7016-23.2664 12.1 light-years
- HIP 77184 16.4 light-years
- USco J160818.43-223225.0 17.9 light-years
- USco J160606.29-233513.3 18.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.