Star · M4V
WISE J181243.14+200746.4
WISE J181243.14+200746.4 is a main-sequence star of spectral type M4V in the constellation Hercules, 67.5 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 67.5 light-years (20.7 pc) |
| Apparent magnitude | magnitude 26.04 |
| Absolute magnitude | magnitude 24.46 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 2.58 × 10⁻⁷ L☉ |
| Radius | 0.00191 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 18h 12m 43.2s |
| Declination (J2000) | +20° 07′ 52″ |
| Space velocity (relative to the Sun) | 53.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 26.04. Visible from the whole Northern Hemisphere and south to latitude 70° S. North of latitude 70° N it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1958. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.2 million years.
The Sun seen from there
From a planet around WISE J181243.14+200746.4, the Sun would look like a star of magnitude 6.41, in the direction where our sky has the constellation Canis Major. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 4046 1.70 light-years
- GJ 4030 7.89 light-years
- Gl 698 7.93 light-years
- GJ 4057 8.18 light-years
- HIP 89490 8.30 light-years
- SDSSp J175032.96+175903.9 8.46 light-years
- WISE J175510.28+180320.2 8.84 light-years
- HD 164922 9.04 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.