Star · K0
GJ 9798
GJ 9798 is a main-sequence star of spectral type K0 in the constellation Pegasus, 73.6 light-years from the Sun.
| Other names | HIP 112870 |
|---|---|
| Constellation | Pegasus |
| Distance | 73.6 light-years (22.6 pc) |
| Apparent magnitude | magnitude 8.29 |
| Absolute magnitude | magnitude 6.52 |
| Spectral type | K0 |
| Surface temperature | 5,140 K |
| Luminosity | 0.273 L☉ |
| Radius | 0.66 R☉ |
| Mass | 0.723 M☉ (estimated) |
| Right ascension (J2000) | 22h 51m 26.4s |
| Declination (J2000) | +13° 58′ 12″ |
| Space velocity (relative to the Sun) | 48.6 km/s |
In the sky
Too faint for the naked eye (magnitude 8.29); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 76° S. North of latitude 76° 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 1952. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.3 million years.
The Sun seen from there
From a planet around GJ 9798, the Sun would look like a star of magnitude 6.60, in the direction where our sky has the constellation Crater. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISEPC J223937.55+161716.2 5.36 light-years
- GJ 9784 9.44 light-years
- ULAS J232035.28+144829.8 9.78 light-years
- GJ 1271 10.3 light-years
- HIP 114378 10.4 light-years
- WISEA J221841.38+143003.4 10.4 light-years
- GJ 4305B 10.6 light-years
- WISEA J221859.33+114644.4 11.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.