Star · M2
Gl 909B
Gl 909B is a main-sequence star of spectral type M2 in the constellation Cepheus, 35.2 light-years from the Sun.
| Constellation | Cepheus |
|---|---|
| Distance | 35.2 light-years (10.8 pc) |
| Apparent magnitude | magnitude 11.70 |
| Absolute magnitude | magnitude 11.53 |
| Spectral type | M2 |
| Surface temperature | 3,890 K |
| Luminosity | 0.00682 L☉ |
| Radius | 0.182 R☉ |
| Mass | 0.217 M☉ (estimated) |
| Right ascension (J2000) | 23h 52m 20.6s |
| Declination (J2000) | +75° 32′ 37″ |
| Space velocity (relative to the Sun) | 18.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.70. Visible from the whole Northern Hemisphere and south to latitude 14° S. North of latitude 14° N it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1991. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 625 thousand years.
The Sun seen from there
From a planet around Gl 909B, the Sun would look like a star of magnitude 5.00, in the direction where our sky has the constellation Musca. It would be visible 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.