Star · M2V
SDSS J155526.15+001720.6
SDSS J155526.15+001720.6 is a main-sequence star of spectral type M2V in the constellation Serpens, 144.8 light-years from the Sun.
| Constellation | Serpens |
|---|---|
| Distance | 144.8 light-years (44.4 pc) |
| Apparent magnitude | magnitude 21.52 |
| Absolute magnitude | magnitude 18.28 |
| Spectral type | M2V |
| Surface temperature | 3,340 K |
| Luminosity | 3.23 × 10⁻⁵ L☉ |
| Radius | 0.017 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 15h 55m 25.9s |
| Declination (J2000) | +0° 17′ 20″ |
| Space velocity (relative to the Sun) | 53.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.52. Visible from the whole Southern Hemisphere and north to latitude 90° N. 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 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 J155526.15+001720.6, the Sun would look like a star of magnitude 8.07, 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 78399 3.21 light-years
- ULAS J154038.87-001256.7 10.9 light-years
- HIP 77810 11.7 light-years
- SDSS J160510.15+042152.1 12.9 light-years
- HIP 77749 13.8 light-years
- HIP 79730 14.1 light-years
- HIP 77210 15.7 light-years
- HIP 76292 15.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.