Star · M4V
WISE J223720.39+722833.8
WISE J223720.39+722833.8 is a main-sequence star of spectral type M4V in the constellation Cepheus, 48.6 light-years from the Sun.
| Constellation | Cepheus |
|---|---|
| Distance | 48.6 light-years (14.9 pc) |
| Apparent magnitude | magnitude 23.26 |
| Absolute magnitude | magnitude 22.39 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.73 × 10⁻⁶ L☉ |
| Radius | 0.00495 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 22h 37m 20.6s |
| Declination (J2000) | +72° 28′ 35″ |
| Space velocity (relative to the Sun) | 9.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 23.26. Visible from the whole Northern Hemisphere and south to latitude 18° S. North of latitude 18° N 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 1977. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 862 thousand years.
The Sun seen from there
From a planet around WISE J223720.39+722833.8, the Sun would look like a star of magnitude 5.70, in the direction where our sky has the constellation Carina. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 4312 4.25 light-years
- Errai 6.41 light-years
- CWISEP J213249.05+690113.7 6.61 light-years
- 2MASS J21265916+7617440 7.20 light-years
- G 264-012 7.21 light-years
- Gl 21 8.94 light-years
- GJ 3015B 9.94 light-years
- Alderamin 10.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.