Star · M4V
ULAS J100731.32+104758.8
ULAS J100731.32+104758.8 is a main-sequence star of spectral type M4V in the constellation Leo, 352.3 light-years from the Sun.
| Constellation | Leo |
|---|---|
| Distance | 352.3 light-years (108.0 pc) |
| Apparent magnitude | magnitude 23.22 |
| Absolute magnitude | magnitude 18.05 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 9.44 × 10⁻⁵ L☉ |
| Radius | 0.0366 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 10h 07m 31.4s |
| Declination (J2000) | +10° 47′ 59″ |
| Space velocity (relative to the Sun) | 48.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 23.22. Visible from the whole Northern Hemisphere and south to latitude 79° S. North of latitude 79° 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 1674. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.2 million years.
The Sun seen from there
From a planet around ULAS J100731.32+104758.8, the Sun would look like a star of magnitude 10.00, in the direction where our sky has the constellation Aquarius. 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.