Star · M4V
SDSS J100559.85+035842.3
SDSS J100559.85+035842.3 is a main-sequence star of spectral type M4V in the constellation Sextans, 225.1 light-years from the Sun.
| Constellation | Sextans |
|---|---|
| Distance | 225.1 light-years (69.0 pc) |
| Apparent magnitude | magnitude 21.45 |
| Absolute magnitude | magnitude 17.26 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.97 × 10⁻⁴ L☉ |
| Radius | 0.0528 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 10h 05m 59.9s |
| Declination (J2000) | +3° 58′ 43″ |
| Space velocity (relative to the Sun) | 53.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.45. Visible from the whole Northern Hemisphere and south to latitude 86° S. 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 1801. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.0 million years.
The Sun seen from there
From a planet around SDSS J100559.85+035842.3, the Sun would look like a star of magnitude 9.02, 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 49777 7.33 light-years
- HIP 49508 7.74 light-years
- CFBDS J100113.05+022622.3 9.97 light-years
- HIP 50656 16.8 light-years
- HIP 49256 16.9 light-years
- HIP 49396 19.2 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.