Star · M4V
SDSS J081556.74+452411.8
SDSS J081556.74+452411.8 is a main-sequence star of spectral type M4V in the constellation Lynx, 221.8 light-years from the Sun.
| Constellation | Lynx |
|---|---|
| Distance | 221.8 light-years (68.0 pc) |
| Apparent magnitude | magnitude 21.56 |
| Absolute magnitude | magnitude 17.40 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.73 × 10⁻⁴ L☉ |
| Radius | 0.0495 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 8h 15m 56.7s |
| Declination (J2000) | +45° 24′ 12″ |
| Space velocity (relative to the Sun) | 23.9 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 45° S. North of latitude 45° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1804. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.9 million years.
The Sun seen from there
From a planet around SDSS J081556.74+452411.8, the Sun would look like a star of magnitude 8.99, in the direction where our sky has the constellation Telescopium. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 40674 3.78 light-years
- HIP 40844 7.45 light-years
- HIP 40927 8.82 light-years
- HIP 40447 9.78 light-years
- HIP 41815 12.6 light-years
- SDSS J080159.52+480628.6 16.9 light-years
- HIP 39072 17.0 light-years
- HIP 42233 18.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.