Star · M4V
ULAS J231557.61+132256.2
ULAS J231557.61+132256.2 is a main-sequence star of spectral type M4V in the constellation Pegasus, 101.1 light-years from the Sun.
| Constellation | Pegasus |
|---|---|
| Distance | 101.1 light-years (31.0 pc) |
| Apparent magnitude | magnitude 25.28 |
| Absolute magnitude | magnitude 22.82 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.17 × 10⁻⁶ L☉ |
| Radius | 0.00406 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 23h 15m 57.6s |
| Declination (J2000) | +13° 22′ 58″ |
| Space velocity (relative to the Sun) | 38.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 25.28. Visible from the whole Northern Hemisphere and south to latitude 77° S. North of latitude 77° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1925. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.8 million years.
The Sun seen from there
From a planet around ULAS J231557.61+132256.2, the Sun would look like a star of magnitude 7.29, in the direction where our sky has the constellation Crater. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 115860 7.12 light-years
- ULAS J230601.02+130225.0 10.9 light-years
- Gl 893.4 11.0 light-years
- HIP 113445 11.8 light-years
- WISE J230356.79+191432.9 12.9 light-years
- HIP 114096 13.0 light-years
- ULAS J232802.03+134544.8 13.9 light-years
- GJ 4328 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.