Star · ?
GJ 3458B
GJ 3458B is a main-sequence star of spectral type ? in the constellation Gemini, 123.5 light-years from the Sun.
| Constellation | Gemini |
|---|---|
| Distance | 123.5 light-years (37.9 pc) |
| Apparent magnitude | magnitude 18.00 |
| Absolute magnitude | magnitude 15.11 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 3.50 × 10⁻⁴ L☉ |
| Radius | 0.0468 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 7h 39m 36.6s |
| Declination (J2000) | +33° 28′ 02″ |
| Space velocity (relative to the Sun) | 43.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 18.00. 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 1902. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.2 million years.
The Sun seen from there
From a planet around GJ 3458B, the Sun would look like a star of magnitude 7.72, 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):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.