Star · M4V
SDSS J121951.45+312849.4
SDSS J121951.45+312849.4 is a main-sequence star of spectral type M4V in the constellation Coma Berenices, 62.6 light-years from the Sun.
| Constellation | Coma Berenices |
|---|---|
| Distance | 62.6 light-years (19.2 pc) |
| Apparent magnitude | magnitude 21.41 |
| Absolute magnitude | magnitude 19.99 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.58 × 10⁻⁵ L☉ |
| Radius | 0.015 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 12h 19m 51.5s |
| Declination (J2000) | +31° 28′ 49″ |
| Space velocity (relative to the Sun) | 29.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.41. Visible from the whole Northern Hemisphere and south to latitude 59° S. North of latitude 59° N it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1963. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.1 million years.
The Sun seen from there
From a planet around SDSS J121951.45+312849.4, the Sun would look like a star of magnitude 6.25, in the direction where our sky has the constellation Sculptor. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.