Star · M4V
ULAS J091740.85+004254.0
ULAS J091740.85+004254.0 is a main-sequence star of spectral type M4V in the constellation Hydra, 339.2 light-years from the Sun.
| Constellation | Hydra |
|---|---|
| Distance | 339.2 light-years (104.0 pc) |
| Apparent magnitude | magnitude 23.07 |
| Absolute magnitude | magnitude 17.98 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.00 × 10⁻⁴ L☉ |
| Radius | 0.0377 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 9h 17m 40.8s |
| Declination (J2000) | +0° 42′ 54″ |
| Space velocity (relative to the Sun) | 12.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 23.07. Visible from the whole Northern Hemisphere and south to latitude 89° S. 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 1687. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.0 million years.
The Sun seen from there
From a planet around ULAS J091740.85+004254.0, the Sun would look like a star of magnitude 9.92, 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.