Star · M4V
SDSS J213240.36+102949.4
SDSS J213240.36+102949.4 is a main-sequence star of spectral type M4V in the constellation Pegasus, 145.5 light-years from the Sun.
| Constellation | Pegasus |
|---|---|
| Distance | 145.5 light-years (44.6 pc) |
| Apparent magnitude | magnitude 22.09 |
| Absolute magnitude | magnitude 18.84 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 4.56 × 10⁻⁵ L☉ |
| Radius | 0.0254 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 21h 32m 40.3s |
| Declination (J2000) | +10° 29′ 49″ |
| Space velocity (relative to the Sun) | 23.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.09. Visible from the whole Northern Hemisphere and south to latitude 80° S. North of latitude 80° N it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1881. 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 SDSS J213240.36+102949.4, the Sun would look like a star of magnitude 8.08, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 828.4 2.81 light-years
- HIP 105202 10.7 light-years
- HIP 104759 12.9 light-years
- BD+05 4868 A 13.8 light-years
- HIP 107924 17.9 light-years
- HIP 108228 18.1 light-years
- HIP 104075 18.4 light-years
- GJ 4231 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.