Star · M4V
2MASS J21203387-0747208
2MASS J21203387-0747208 is a main-sequence star of spectral type M4V in the constellation Aquarius, 208.7 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 208.7 light-years (64.0 pc) |
| Apparent magnitude | magnitude 22.67 |
| Absolute magnitude | magnitude 18.64 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 5.50 × 10⁻⁵ L☉ |
| Radius | 0.0279 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 21h 20m 33.9s |
| Declination (J2000) | −7° 47′ 21″ |
| Space velocity (relative to the Sun) | 6.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.67. Visible from the whole Southern Hemisphere and north to latitude 82° N. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1817. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.7 million years.
The Sun seen from there
From a planet around 2MASS J21203387-0747208, the Sun would look like a star of magnitude 8.86, in the direction where our sky has the constellation Cancer. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 105641 5.94 light-years
- HIP 105947 7.04 light-years
- HIP 105120 9.63 light-years
- HIP 105451 13.7 light-years
- SIMP J21174252-0611132 16.2 light-years
- HIP 105243 16.5 light-years
- 20 Aqr 17.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.