Star · M4V
SDSS J125645.82+151443.7
SDSS J125645.82+151443.7 is a main-sequence star of spectral type M4V in the constellation Coma Berenices, 247.9 light-years from the Sun.
| Constellation | Coma Berenices |
|---|---|
| Distance | 247.9 light-years (76.0 pc) |
| Apparent magnitude | magnitude 21.63 |
| Absolute magnitude | magnitude 17.23 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 2.02 × 10⁻⁴ L☉ |
| Radius | 0.0535 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 12h 56m 45.8s |
| Declination (J2000) | +15° 14′ 44″ |
| Space velocity (relative to the Sun) | 22.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.63. Visible from the whole Northern Hemisphere and south to latitude 75° S. North of latitude 75° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1778. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.4 million years.
The Sun seen from there
From a planet around SDSS J125645.82+151443.7, the Sun would look like a star of magnitude 9.23, in the direction where our sky has the constellation Cetus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 63509 9.91 light-years
- SDSS J125108.28+155911.1 10.8 light-years
- SDSS J125550.62+170059.7 12.6 light-years
- HIP 63694 14.7 light-years
- HIP 63878 15.4 light-years
- HIP 63660 15.4 light-years
- HIP 62198 17.0 light-years
- HIP 62751 17.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.