Star · ?
GJ 3440
GJ 3440 is a main-sequence star of spectral type ? in the constellation Mensa, 90.1 light-years from the Sun.
| Constellation | Mensa |
|---|---|
| Distance | 90.1 light-years (27.6 pc) |
| Apparent magnitude | magnitude 11.75 |
| Absolute magnitude | magnitude 9.54 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.0588 L☉ |
| Radius | 0.607 R☉ |
| Mass | 0.492 M☉ (estimated) |
| Right ascension (J2000) | 7h 15m 39.8s |
| Declination (J2000) | −83° 00′ 04″ |
| Space velocity (relative to the Sun) | 88.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.75. Visible from the whole Southern Hemisphere and north to latitude 7° N. South of latitude 7° S it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1936. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.6 million years.
The Sun seen from there
From a planet around GJ 3440, the Sun would look like a star of magnitude 7.04, in the direction where our sky has the constellation Draco. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 3486 4.90 light-years
- WISEA J065113.90-835502.6 5.58 light-years
- HIP 35937 8.96 light-years
- GJ 3591 9.68 light-years
- 2MASS J09221952-8010399 10.5 light-years
- HIP 25612 10.8 light-years
- HIP 64690 14.6 light-years
- Gl 67.1 14.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.