Star · M4V
SDSS J091816.02+481300.4
SDSS J091816.02+481300.4 is a main-sequence star of spectral type M4V in the constellation Ursa Major, 159.8 light-years from the Sun.
| Constellation | Ursa Major |
|---|---|
| Distance | 159.8 light-years (49.0 pc) |
| Apparent magnitude | magnitude 21.93 |
| Absolute magnitude | magnitude 18.48 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 6.37 × 10⁻⁵ L☉ |
| Radius | 0.0301 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 9h 18m 16.0s |
| Declination (J2000) | +48° 13′ 00″ |
| Space velocity (relative to the Sun) | 48.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.93. Visible from the whole Northern Hemisphere and south to latitude 42° S. North of latitude 42° 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 1866. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.8 million years.
The Sun seen from there
From a planet around SDSS J091816.02+481300.4, the Sun would look like a star of magnitude 8.28, in the direction where our sky has the constellation Indus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 45274 7.36 light-years
- SDSS J091659.09+512450.4 9.63 light-years
- HIP 44727 10.2 light-years
- HIP 46903 11.0 light-years
- HIP 47605 15.5 light-years
- HIP 47033 15.7 light-years
- HIP 48391 15.9 light-years
- HIP 44607 17.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.