Star · ?
GJ 4004
GJ 4004 is a main-sequence star of spectral type ? in the constellation Apus, 41.5 light-years from the Sun.
| Constellation | Apus |
|---|---|
| Distance | 41.5 light-years (12.7 pc) |
| Apparent magnitude | magnitude 12.10 |
| Absolute magnitude | magnitude 11.57 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.00906 L☉ |
| Radius | 0.238 R☉ |
| Mass | 0.245 M☉ (estimated) |
| Right ascension (J2000) | 17h 29m 30.6s |
| Declination (J2000) | −80° 10′ 33″ |
| Space velocity (relative to the Sun) | 42.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.10. Visible from the whole Southern Hemisphere and north to latitude 10° N. South of latitude 10° S it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1984. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 737 thousand years.
The Sun seen from there
From a planet around GJ 4004, the Sun would look like a star of magnitude 5.36, in the direction where our sky has the constellation Camelopardalis. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISE J173551.72-820900.1 2.10 light-years
- LHS 475 3.49 light-years
- GJ 1251 6.79 light-years
- 2MASS J13550323-8258375 7.33 light-years
- WISEPA J201824.96-742325.9 7.80 light-years
- ζ TrA 7.88 light-years
- GJ 4154 8.45 light-years
- CWISEP J124138.41-820051.9 9.97 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.