Star · M4V
ULAS J082155.49+250939.6
ULAS J082155.49+250939.6 is a main-sequence star of spectral type M4V in the constellation Cancer, 146.8 light-years from the Sun.
| Constellation | Cancer |
|---|---|
| Distance | 146.8 light-years (45.0 pc) |
| Apparent magnitude | magnitude 24.73 |
| Absolute magnitude | magnitude 21.46 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 4.08 × 10⁻⁶ L☉ |
| Radius | 0.0076 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 8h 21m 55.8s |
| Declination (J2000) | +25° 09′ 40″ |
| Space velocity (relative to the Sun) | 96.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 24.73. Visible from the whole Northern Hemisphere and south to latitude 65° S. North of latitude 65° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1879. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.6 million years.
The Sun seen from there
From a planet around ULAS J082155.49+250939.6, the Sun would look like a star of magnitude 8.10, in the direction where our sky has the constellation Capricornus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- ULAS J081110.86+252931.8 6.28 light-years
- HIP 42356 9.88 light-years
- ULAS J081507.26+271119.2 11.6 light-years
- HIP 39528 12.0 light-years
- SDSS J075656.54+231458.5 15.6 light-years
- HIP 41136 15.9 light-years
- SDSS J082642.65+193922.0 16.3 light-years
- ψ Cnc 16.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.