Star · M4V
WISE J212100.87-623921.6
WISE J212100.87-623921.6 is a main-sequence star of spectral type M4V in the constellation Pavo, 43.4 light-years from the Sun.
| Constellation | Pavo |
|---|---|
| Distance | 43.4 light-years (13.3 pc) |
| Apparent magnitude | magnitude 22.93 |
| Absolute magnitude | magnitude 22.31 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.87 × 10⁻⁶ L☉ |
| Radius | 0.00515 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 21h 21m 00.3s |
| Declination (J2000) | −62° 39′ 19″ |
| Space velocity (relative to the Sun) | 29.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.93. Visible from the whole Southern Hemisphere and north to latitude 27° N. South of latitude 27° S it never sets. 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 1983. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 770 thousand years.
The Sun seen from there
From a planet around WISE J212100.87-623921.6, the Sun would look like a star of magnitude 5.45, in the direction where our sky has the constellation Ursa Major. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.