Star · M4V
ULAS J151821.34+085517.5
ULAS J151821.34+085517.5 is a main-sequence star of spectral type M4V in the constellation Serpens, 185.9 light-years from the Sun.
| Constellation | Serpens |
|---|---|
| Distance | 185.9 light-years (57.0 pc) |
| Apparent magnitude | magnitude 22.92 |
| Absolute magnitude | magnitude 19.14 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 3.47 × 10⁻⁵ L☉ |
| Radius | 0.0222 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 15h 18m 21.4s |
| Declination (J2000) | +8° 55′ 18″ |
| Space velocity (relative to the Sun) | 30.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.92. Visible from the whole Northern Hemisphere and south to latitude 81° S. 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 1840. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.3 million years.
The Sun seen from there
From a planet around ULAS J151821.34+085517.5, the Sun would look like a star of magnitude 8.61, in the direction where our sky has the constellation Eridanus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- ULAS J153128.47+073755.0 13.2 light-years
- CFBDS J152514.82+111833.1 13.8 light-years
- HIP 75964 14.9 light-years
- HIP 73815 15.1 light-years
- ULAS J152912.23+092228.5 15.6 light-years
- HIP 73418 16.6 light-years
- HIP 73434 17.1 light-years
- HIP 76710 19.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.