Star · M4V
ULAS J032143.05+054524.3
ULAS J032143.05+054524.3 is a main-sequence star of spectral type M4V in the constellation Cetus, 257.7 light-years from the Sun.
| Constellation | Cetus |
|---|---|
| Distance | 257.7 light-years (79.0 pc) |
| Apparent magnitude | magnitude 22.83 |
| Absolute magnitude | magnitude 18.34 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 7.23 × 10⁻⁵ L☉ |
| Radius | 0.032 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 3h 21m 43.0s |
| Declination (J2000) | +5° 45′ 26″ |
| Space velocity (relative to the Sun) | 73.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.83. Visible from the whole Northern Hemisphere and south to latitude 84° S. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1768. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.6 million years.
The Sun seen from there
From a planet around ULAS J032143.05+054524.3, the Sun would look like a star of magnitude 9.32, in the direction where our sky has the constellation Libra. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 15279 13.8 light-years
- HIP 16155 14.9 light-years
- HIP 14640 19.0 light-years
- HIP 16240 19.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.