Star · M4V
WISEA J201530.67-421542.5
WISEA J201530.67-421542.5 is a main-sequence star of spectral type M4V in the constellation Sagittarius, 114.2 light-years from the Sun.
| Constellation | Sagittarius |
|---|---|
| Distance | 114.2 light-years (35.0 pc) |
| Apparent magnitude | magnitude 23.15 |
| Absolute magnitude | magnitude 20.43 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.06 × 10⁻⁵ L☉ |
| Radius | 0.0122 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 20h 15m 30.6s |
| Declination (J2000) | −42° 15′ 41″ |
| Space velocity (relative to the Sun) | 27.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 23.15. Visible from the whole Southern Hemisphere and north to latitude 48° N. South of latitude 48° S it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1912. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.0 million years.
The Sun seen from there
From a planet around WISEA J201530.67-421542.5, the Sun would look like a star of magnitude 7.55, in the direction where our sky has the constellation Lynx. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 776.1 9.78 light-years
- HIP 97693 11.0 light-years
- HIP 97370 11.3 light-years
- HIP 100184 15.1 light-years
- WISEA J193430.11-421444.3 15.7 light-years
- HIP 101905 16.6 light-years
- HIP 101317 16.6 light-years
- ι Mic 16.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.