Star · M4V
SDSS J102947.68+483412.2
SDSS J102947.68+483412.2 is a main-sequence star of spectral type M4V in the constellation Ursa Major, 349.0 light-years from the Sun.
| Constellation | Ursa Major |
|---|---|
| Distance | 349.0 light-years (107.0 pc) |
| Apparent magnitude | magnitude 22.26 |
| Absolute magnitude | magnitude 17.11 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 2.24 × 10⁻⁴ L☉ |
| Radius | 0.0564 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 10h 29m 47.7s |
| Declination (J2000) | +48° 34′ 12″ |
| Space velocity (relative to the Sun) | 47.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.26. Visible from the whole Northern Hemisphere and south to latitude 41° S. North of latitude 41° N it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1677. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.2 million years.
The Sun seen from there
From a planet around SDSS J102947.68+483412.2, the Sun would look like a star of magnitude 9.98, in the direction where our sky has the constellation Grus. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.