Star · M3V
2MASSI J0239424-173547
2MASSI J0239424-173547 is a main-sequence star of spectral type M3V in the constellation Cetus, 98.3 light-years from the Sun.
| Constellation | Cetus |
|---|---|
| Distance | 98.3 light-years (30.1 pc) |
| Apparent magnitude | magnitude 21.39 |
| Absolute magnitude | magnitude 18.99 |
| Spectral type | M3V |
| Surface temperature | 3,170 K |
| Luminosity | 2.40 × 10⁻⁵ L☉ |
| Radius | 0.0162 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 2h 39m 42.5s |
| Declination (J2000) | −17° 35′ 49″ |
| Space velocity (relative to the Sun) | 16.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.39. Visible from the whole Southern Hemisphere and north to latitude 72° N. South of latitude 72° S it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1928. 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 2MASSI J0239424-173547, the Sun would look like a star of magnitude 7.23, 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):
- SDSS J024749.90-163112.6 5.27 light-years
- HIP 11739 10.9 light-years
- HIP 13079 11.6 light-years
- HIP 11759 11.7 light-years
- SSSPM J0219-1939 12.3 light-years
- 2MASSW J0309088-194938 12.9 light-years
- GJ 3138 13.5 light-years
- DENIS J0230450-095305 13.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.