Star · M4V
USco J154722.82-213914.3
USco J154722.82-213914.3 is a main-sequence star of spectral type M4V in the constellation Scorpius, 587.1 light-years from the Sun.
| Constellation | Scorpius |
|---|---|
| Distance | 587.1 light-years (180.0 pc) |
| Apparent magnitude | magnitude 21.53 |
| Absolute magnitude | magnitude 15.25 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 0.00124 L☉ |
| Radius | 0.133 R☉ |
| Mass | 0.103 M☉ (estimated) |
| Right ascension (J2000) | 15h 47m 22.8s |
| Declination (J2000) | −21° 39′ 14″ |
| Space velocity (relative to the Sun) | 22.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.53. 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 1439. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 10 million years.
The Sun seen from there
From a planet around USco J154722.82-213914.3, the Sun would look like a star of magnitude 11.11, in the direction where our sky has the constellation Taurus. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.