Star · M4V
SDSS J102109.69-030420.1
SDSS J102109.69-030420.1 is a main-sequence star of spectral type M4V in the constellation Sextans, 96.9 light-years from the Sun.
| Constellation | Sextans |
|---|---|
| Distance | 96.9 light-years (29.7 pc) |
| Apparent magnitude | magnitude 23.75 |
| Absolute magnitude | magnitude 21.39 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 4.38 × 10⁻⁶ L☉ |
| Radius | 0.00788 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 10h 21m 09.7s |
| Declination (J2000) | −3° 04′ 20″ |
| Space velocity (relative to the Sun) | 26.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 23.75. Visible from the whole Southern Hemisphere and north to latitude 87° N. 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 1929. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.7 million years.
The Sun seen from there
From a planet around SDSS J102109.69-030420.1, the Sun would look like a star of magnitude 7.19, in the direction where our sky has the constellation Pegasus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 51127 7.19 light-years
- HIP 50657 8.02 light-years
- HIP 51386 9.33 light-years
- WISEA J104216.89-003935.9 9.96 light-years
- HIP 49350 11.5 light-years
- 2MASS J09553336-0208403 12.0 light-years
- Gl 389.1 12.5 light-years
- SDSS J104922.45+012559.2 14.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.