Star · M4V
ULAS J220917.12-005259.9
ULAS J220917.12-005259.9 is a main-sequence star of spectral type M4V in the constellation Aquarius, 508.8 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 508.8 light-years (156.0 pc) |
| Apparent magnitude | magnitude 23.51 |
| Absolute magnitude | magnitude 17.54 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.51 × 10⁻⁴ L☉ |
| Radius | 0.0462 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 22h 09m 17.2s |
| Declination (J2000) | −0° 52′ 59″ |
| Space velocity (relative to the Sun) | 88.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 23.51. 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 1517. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 9.0 million years.
The Sun seen from there
From a planet around ULAS J220917.12-005259.9, the Sun would look like a star of magnitude 10.80, in the direction where our sky has the constellation Sextans. 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.