Star · M4
Gl 799B
Gl 799B is a main-sequence star of spectral type M4 in the constellation Microscopium, 32.0 light-years from the Sun.
| Constellation | Microscopium |
|---|---|
| Distance | 32.0 light-years (9.81 pc) |
| Apparent magnitude | magnitude 11.00 |
| Absolute magnitude | magnitude 11.04 |
| Spectral type | M4 |
| Surface temperature | 3,740 K |
| Luminosity | 0.013 L☉ |
| Radius | 0.272 R☉ |
| Mass | 0.287 M☉ (estimated) |
| Right ascension (J2000) | 20h 41m 51.1s |
| Declination (J2000) | −32° 26′ 11″ |
| Space velocity (relative to the Sun) | 20.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.00. Visible from the whole Southern Hemisphere and north to latitude 58° N. South of latitude 58° S it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1994. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 567 thousand years.
The Sun seen from there
From a planet around Gl 799B, the Sun would look like a star of magnitude 4.79, in the direction where our sky has the constellation Cancer. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 799A 0.37 light-years
- AU Mic 0.78 light-years
- HD 192310 5.29 light-years
- WISE J210200.15-442919.5 8.02 light-years
- WISEPA J195905.66-333833.7 8.85 light-years
- GJ 4207 10.5 light-years
- WISEA J193054.55-205949.4 10.7 light-years
- GJ 4248 11.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.