Star · ?
GJ 3770
GJ 3770 is a white dwarf of spectral type ? in the constellation Centaurus, 54.7 light-years from the Sun.
| Constellation | Centaurus |
|---|---|
| Distance | 54.7 light-years (16.8 pc) |
| Apparent magnitude | magnitude 17.05 |
| Absolute magnitude | magnitude 15.93 |
| Spectral type | ? |
| Surface temperature | 8,000 K |
| Luminosity | 3.85 × 10⁻⁵ L☉ |
| Radius | 0.012 R☉ |
| Mass | 0.6 M☉ (estimated) |
| Right ascension (J2000) | 13h 12m 59.3s |
| Declination (J2000) | −47° 28′ 10″ |
| Space velocity (relative to the Sun) | 172.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 17.05. Visible from the whole Southern Hemisphere and north to latitude 43° N. South of latitude 43° S it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1971. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 971 thousand years.
The Sun seen from there
From a planet around GJ 3770, the Sun would look like a star of magnitude 5.95, in the direction where our sky has the constellation Andromeda. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- CWISE J131548.23-493645.4 3.03 light-years
- HD 113538 5.08 light-years
- GJ 3787 6.00 light-years
- GJ 3764 7.00 light-years
- Gl 531 7.01 light-years
- VHS J125804.89-441232.4 7.20 light-years
- GJ 3811 8.24 light-years
- GJ 2095 8.40 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.