Star · K5
GJ 9725
GJ 9725 is a main-sequence star of spectral type K5 in the constellation Cepheus, 112.9 light-years from the Sun.
| Other names | HIP 104197 |
|---|---|
| Constellation | Cepheus |
| Distance | 112.9 light-years (34.6 pc) |
| Apparent magnitude | magnitude 10.84 |
| Absolute magnitude | magnitude 8.14 |
| Spectral type | K5 |
| Surface temperature | 4,190 K |
| Luminosity | 0.111 L☉ |
| Radius | 0.631 R☉ |
| Mass | 0.577 M☉ (estimated) |
| Right ascension (J2000) | 21h 06m 38.3s |
| Declination (J2000) | +80° 47′ 37″ |
| Space velocity (relative to the Sun) | 51.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.84. Visible from the whole Northern Hemisphere and south to latitude 9° S. North of latitude 9° N it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1913. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.0 million years.
The Sun seen from there
From a planet around GJ 9725, the Sun would look like a star of magnitude 7.53, in the direction where our sky has the constellation Chamaeleon. It would be invisible 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.