Star · K8V
GJ 3457A
GJ 3457A is a main-sequence star of spectral type K8V in the constellation Gemini, 114.6 light-years from the Sun.
| Other names | HIP 37312 |
|---|---|
| Constellation | Gemini |
| Distance | 114.6 light-years (35.1 pc) |
| Apparent magnitude | magnitude 11.85 |
| Absolute magnitude | magnitude 9.12 |
| Spectral type | K8V |
| Surface temperature | 3,870 K |
| Luminosity | 0.064 L☉ |
| Radius | 0.563 R☉ |
| Mass | 0.503 M☉ (estimated) |
| Right ascension (J2000) | 7h 39m 35.9s |
| Declination (J2000) | +33° 27′ 47″ |
| Space velocity (relative to the Sun) | 42.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.85. Visible from the whole Northern Hemisphere and south to latitude 57° S. North of latitude 57° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1911. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.0 million years.
The Sun seen from there
From a planet around GJ 3457A, the Sun would look like a star of magnitude 7.56, in the direction where our sky has the constellation Sagittarius. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 38647 7.13 light-years
- HIP 37177 8.51 light-years
- GJ 3458B 9.00 light-years
- 2MASSW J0740096+321203 10.5 light-years
- σ Gem 11.1 light-years
- HIP 35198 11.2 light-years
- TOI-5734 12.4 light-years
- HIP 37789 12.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.