Star · M2V
SDSS J155120.86+432930.3
SDSS J155120.86+432930.3 is a main-sequence star of spectral type M2V in the constellation Hercules, 147.8 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 147.8 light-years (45.3 pc) |
| Apparent magnitude | magnitude 22.17 |
| Absolute magnitude | magnitude 18.89 |
| Spectral type | M2V |
| Surface temperature | 3,320 K |
| Luminosity | 1.90 × 10⁻⁵ L☉ |
| Radius | 0.0131 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 15h 51m 20.9s |
| Declination (J2000) | +43° 29′ 30″ |
| Space velocity (relative to the Sun) | 87.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.17. Visible from the whole Northern Hemisphere and south to latitude 47° S. North of latitude 47° N it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1878. 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 J155120.86+432930.3, the Sun would look like a star of magnitude 8.11, in the direction where our sky has the constellation Eridanus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 77451 5.13 light-years
- HIP 78356 11.3 light-years
- HIP 78678 17.1 light-years
- HIP 78074 17.2 light-years
- λ CrB 17.5 light-years
- HIP 76540 18.5 light-years
- HIP 76156 19.7 light-years
- HIP 79700 19.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.