Star · M4V
2MASSW J0309088-194938
2MASSW J0309088-194938 is a main-sequence star of spectral type M4V in the constellation Eridanus, 94.6 light-years from the Sun.
| Constellation | Eridanus |
|---|---|
| Distance | 94.6 light-years (29.0 pc) |
| Apparent magnitude | magnitude 21.25 |
| Absolute magnitude | magnitude 18.94 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 4.18 × 10⁻⁵ L☉ |
| Radius | 0.0243 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 3h 09m 08.9s |
| Declination (J2000) | −19° 49′ 39″ |
| Space velocity (relative to the Sun) | 28.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.25. Visible from the whole Southern Hemisphere and north to latitude 70° N. South of latitude 70° S it never sets. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1931. 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 2MASSW J0309088-194938, the Sun would look like a star of magnitude 7.14, in the direction where our sky has the constellation Boötes. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISEA J032440.23-191905.6 7.00 light-years
- HIP 14593 7.22 light-years
- HIP 14589 7.24 light-years
- HIP 14623 8.56 light-years
- WISEA J030119.39-231921.1 9.05 light-years
- τ³ Eri 9.10 light-years
- SDSS J024749.90-163112.6 9.98 light-years
- 2MASS J03264225-2102057 10.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.