Star · M4V
2MASS J23313131+2041273
2MASS J23313131+2041273 is a main-sequence star of spectral type M4V in the constellation Pegasus, 140.2 light-years from the Sun.
| Constellation | Pegasus |
|---|---|
| Distance | 140.2 light-years (43.0 pc) |
| Apparent magnitude | magnitude 21.56 |
| Absolute magnitude | magnitude 18.39 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 6.90 × 10⁻⁵ L☉ |
| Radius | 0.0313 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 23h 31m 31.3s |
| Declination (J2000) | +20° 41′ 27″ |
| Space velocity (relative to the Sun) | 23.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.56. Visible from the whole Northern Hemisphere and south to latitude 69° S. North of latitude 69° 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 1886. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
The Sun seen from there
From a planet around 2MASS J23313131+2041273, the Sun would look like a star of magnitude 8.00, 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 117336 12.5 light-years
- GJ 4356A 12.5 light-years
- PSO J358.5527+22.1393 13.5 light-years
- HIP 114863 14.4 light-years
- HIP 115417 14.5 light-years
- SDSS J233129.35+155222.5 14.6 light-years
- HR 8799 15.1 light-years
- HIP 114081 15.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.