Star · M4V
SDSS J121440.95+631643.4
SDSS J121440.95+631643.4 is a main-sequence star of spectral type M4V in the constellation Ursa Major, 58.4 light-years from the Sun.
| Constellation | Ursa Major |
|---|---|
| Distance | 58.4 light-years (17.9 pc) |
| Apparent magnitude | magnitude 24.09 |
| Absolute magnitude | magnitude 22.83 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.16 × 10⁻⁶ L☉ |
| Radius | 0.00406 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 12h 14m 40.9s |
| Declination (J2000) | +63° 16′ 43″ |
| Space velocity (relative to the Sun) | 11.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 24.09. Visible from the whole Northern Hemisphere and south to latitude 27° S. North of latitude 27° 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 1968. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.0 million years.
The Sun seen from there
From a planet around SDSS J121440.95+631643.4, the Sun would look like a star of magnitude 6.09, in the direction where our sky has the constellation Tucana. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 463 1.96 light-years
- GJ 3750 6.94 light-years
- GJ 3684 7.85 light-years
- WISEPC J132004.16+603426.2 9.16 light-years
- GJ 3710 9.26 light-years
- 2MASSW J1108307+683017 9.95 light-years
- GJ 3704 10.0 light-years
- GJ 3815 11.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.