Star · M4V
WISE J204356.42+622048.9
WISE J204356.42+622048.9 is a main-sequence star of spectral type M4V in the constellation Cepheus, 85.8 light-years from the Sun.
| Constellation | Cepheus |
|---|---|
| Distance | 85.8 light-years (26.3 pc) |
| Apparent magnitude | magnitude 23.10 |
| Absolute magnitude | magnitude 21.00 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 6.25 × 10⁻⁶ L☉ |
| Radius | 0.00941 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 20h 43m 56.0s |
| Declination (J2000) | +62° 20′ 44″ |
| Space velocity (relative to the Sun) | 71.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 23.10. Visible from the whole Northern Hemisphere and south to latitude 28° S. North of latitude 28° N 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 1940. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.5 million years.
The Sun seen from there
From a planet around WISE J204356.42+622048.9, the Sun would look like a star of magnitude 6.93, in the direction where our sky has the constellation Carina. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISEA J205921.85+662725.2 6.67 light-years
- GJ 4150 6.80 light-years
- WISEPC J201546.27+664645.1 8.52 light-years
- GJ 4156 8.67 light-years
- GJ 9722 8.91 light-years
- HIP 99355 9.86 light-years
- GJ 9706 10.1 light-years
- GJ 9677A 10.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.