Star · M4V
ULAS J222711-004547
ULAS J222711-004547 is a main-sequence star of spectral type M4V in the constellation Aquarius, 94.6 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 94.6 light-years (29.0 pc) |
| Apparent magnitude | magnitude 23.76 |
| Absolute magnitude | magnitude 21.45 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 4.14 × 10⁻⁶ L☉ |
| Radius | 0.00766 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 22h 27m 10.9s |
| Declination (J2000) | −0° 45′ 47″ |
| Space velocity (relative to the Sun) | 13.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 23.76. Visible from the whole Southern Hemisphere and north to latitude 89° 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 1931. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.7 million years.
The Sun seen from there
From a planet around ULAS J222711-004547, the Sun would look like a star of magnitude 7.14, in the direction where our sky has the constellation Sextans. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- ζ¹ Aqr 1.40 light-years
- HIP 112388 9.08 light-years
- SIMP J22355244+0418563 9.24 light-years
- WISEPC J223729.53-061434.2 10.0 light-years
- GJ 4278B 12.6 light-years
- GJ 9763 13.1 light-years
- PSO J329.8288+03.0840 13.7 light-years
- Biham 14.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.