Star · A1V
GJ 9800B
GJ 9800B is a main-sequence star of spectral type A1V in the constellation Piscis Austrinus, 226.2 light-years from the Sun.
| Constellation | Piscis Austrinus |
|---|---|
| Distance | 226.2 light-years (69.4 pc) |
| Apparent magnitude | magnitude 8.60 |
| Absolute magnitude | magnitude 4.39 |
| Spectral type | A1V |
| Surface temperature | 9,710 K |
| Luminosity | 1.97 L☉ |
| Radius | 0.496 R☉ |
| Mass | 1.18 M☉ (estimated) |
| Right ascension (J2000) | 22h 52m 31.2s |
| Declination (J2000) | −32° 52′ 33″ |
| Space velocity (relative to the Sun) | 24.1 km/s |
In the sky
Too faint for the naked eye (magnitude 8.60); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 57° N. South of latitude 57° S 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 1800. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.0 million years.
The Sun seen from there
From a planet around GJ 9800B, the Sun would look like a star of magnitude 9.04, in the direction where our sky has the constellation Leo Minor. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 112746 2.30 light-years
- γ PsA 3.37 light-years
- HIP 113213 6.17 light-years
- HIP 112064 11.3 light-years
- HIP 113447 11.6 light-years
- HIP 113179 14.2 light-years
- HIP 114139 17.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.