Star · M4V
ULAS J211317.05+001840.7
ULAS J211317.05+001840.7 is a main-sequence star of spectral type M4V in the constellation Aquarius, 172.9 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 172.9 light-years (53.0 pc) |
| Apparent magnitude | magnitude 25.79 |
| Absolute magnitude | magnitude 22.17 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 2.13 × 10⁻⁶ L☉ |
| Radius | 0.0055 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 21h 13m 17.1s |
| Declination (J2000) | +0° 18′ 46″ |
| Space velocity (relative to the Sun) | 18.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 25.79. Visible from the whole Southern Hemisphere and north to latitude 90° N. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1853. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.1 million years.
The Sun seen from there
From a planet around ULAS J211317.05+001840.7, the Sun would look like a star of magnitude 8.45, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 105639 10.5 light-years
- HIP 104138 11.2 light-years
- HIP 104047 11.7 light-years
- CFBDS J212702.19+002344.7 12.1 light-years
- CFBDS J212243.69+042941.9 16.1 light-years
- ε Equ 16.6 light-years
- HIP 104045 17.1 light-years
- HIP 103571 17.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.