Star · M4V
2MASSI J2254188+312349
2MASSI J2254188+312349 is a main-sequence star of spectral type M4V in the constellation Pegasus, 45.3 light-years from the Sun.
| Constellation | Pegasus |
|---|---|
| Distance | 45.3 light-years (13.9 pc) |
| Apparent magnitude | magnitude 22.76 |
| Absolute magnitude | magnitude 22.04 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 2.39 × 10⁻⁶ L☉ |
| Radius | 0.00582 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 22h 54m 18.9s |
| Declination (J2000) | +31° 23′ 50″ |
| Space velocity (relative to the Sun) | 12.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.76. Visible from the whole Northern Hemisphere and south to latitude 59° S. North of latitude 59° 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 1981. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 804 thousand years.
The Sun seen from there
From a planet around 2MASSI J2254188+312349, the Sun would look like a star of magnitude 5.55, in the direction where our sky has the constellation Hydra. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.