Star · M4V
SDSS J101929.15+171205.7
SDSS J101929.15+171205.7 is a main-sequence star of spectral type M4V in the constellation Leo, 267.5 light-years from the Sun.
| Constellation | Leo |
|---|---|
| Distance | 267.5 light-years (82.0 pc) |
| Apparent magnitude | magnitude 21.66 |
| Absolute magnitude | magnitude 17.09 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 2.29 × 10⁻⁴ L☉ |
| Radius | 0.057 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 10h 19m 29.2s |
| Declination (J2000) | +17° 12′ 06″ |
| Space velocity (relative to the Sun) | 29.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.66. Visible from the whole Northern Hemisphere and south to latitude 73° S. North of latitude 73° 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 1759. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.7 million years.
The Sun seen from there
From a planet around SDSS J101929.15+171205.7, the Sun would look like a star of magnitude 9.40, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 51479 14.2 light-years
- HIP 51147 16.4 light-years
- SIMP J10144907+1900041 18.0 light-years
- HIP 51145 18.0 light-years
- PSO J152.2977+15.9912 18.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.