Star · M1
GJ 4258A
GJ 4258A is a main-sequence star of spectral type M1 in the constellation Cepheus, 76.5 light-years from the Sun.
| Constellation | Cepheus |
|---|---|
| Distance | 76.5 light-years (23.5 pc) |
| Apparent magnitude | magnitude 11.62 |
| Absolute magnitude | magnitude 9.77 |
| Spectral type | M1 |
| Surface temperature | 3,720 K |
| Luminosity | 0.0431 L☉ |
| Radius | 0.5 R☉ |
| Mass | 0.456 M☉ (estimated) |
| Right ascension (J2000) | 22h 05m 45.8s |
| Declination (J2000) | +65° 38′ 54″ |
| Space velocity (relative to the Sun) | 63.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.62. Visible from the whole Northern Hemisphere and south to latitude 24° S. North of latitude 24° 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 1949. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around GJ 4258A, the Sun would look like a star of magnitude 6.68, 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):
- HIP 109980 4.26 light-years
- HIP 106400 6.85 light-years
- GJ 1266 7.39 light-years
- HIP 112245 7.91 light-years
- GJ 9809 9.15 light-years
- GJ 4280 9.47 light-years
- TOI-6324 9.78 light-years
- 2MASS J23140244+6939368 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.