Star · ?
GJ 4312
GJ 4312 is a main-sequence star of spectral type ? in the constellation Cepheus, 50.2 light-years from the Sun.
| Constellation | Cepheus |
|---|---|
| Distance | 50.2 light-years (15.4 pc) |
| Apparent magnitude | magnitude 12.45 |
| Absolute magnitude | magnitude 11.51 |
| Spectral type | ? |
| Surface temperature | 3,730 K |
| Luminosity | 0.00848 L☉ |
| Radius | 0.22 R☉ |
| Mass | 0.238 M☉ (estimated) |
| Right ascension (J2000) | 23h 07m 22.7s |
| Declination (J2000) | +68° 40′ 04″ |
| Space velocity (relative to the Sun) | 83.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.45. Visible from the whole Northern Hemisphere and south to latitude 21° S. North of latitude 21° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1976. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 891 thousand years.
The Sun seen from there
From a planet around GJ 4312, the Sun would look like a star of magnitude 5.77, 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):
- WISE J223720.39+722833.8 4.25 light-years
- Gl 21 6.85 light-years
- G 264-012 7.24 light-years
- CWISEP J213249.05+690113.7 7.82 light-years
- GJ 4311 9.11 light-years
- Errai 9.29 light-years
- GJ 4267 9.71 light-years
- 2MASS J21265916+7617440 10.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.