Star · M0
GJ 9809
GJ 9809 is a main-sequence star of spectral type M0 in the constellation Cepheus, 78.4 light-years from the Sun.
| Other names | HIP 114066 |
|---|---|
| Constellation | Cepheus |
| Distance | 78.4 light-years (24.0 pc) |
| Apparent magnitude | magnitude 10.87 |
| Absolute magnitude | magnitude 8.97 |
| Spectral type | M0 |
| Surface temperature | 3,890 K |
| Luminosity | 0.0725 L☉ |
| Radius | 0.594 R☉ |
| Mass | 0.519 M☉ (estimated) |
| Right ascension (J2000) | 23h 06m 04.9s |
| Declination (J2000) | +63° 55′ 34″ |
| Space velocity (relative to the Sun) | 32.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.87. Visible from the whole Northern Hemisphere and south to latitude 26° S. North of latitude 26° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1948. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around GJ 9809, the Sun would look like a star of magnitude 6.73, in the direction where our sky has the constellation Carina. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 112245 4.98 light-years
- 2MASS J23140244+6939368 8.16 light-years
- HIP 112915 8.79 light-years
- HIP 109980 9.10 light-years
- GJ 4307 9.13 light-years
- GJ 4258A 9.15 light-years
- GJ 4280 9.16 light-years
- GJ 1266 11.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.