Star · G0 IV
HD 219828
HD 219828 is a subgiant star of spectral type G0 IV in the constellation Pegasus, 236.6 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Other names | HIP 115100 |
|---|---|
| Constellation | Pegasus |
| Distance | 236.6 light-years (72.5 pc) |
| Apparent magnitude | magnitude 8.04 |
| Absolute magnitude | magnitude 3.74 |
| Spectral type | G0 IV |
| Surface temperature | 5,890 K |
| Luminosity | 2.63 L☉ |
| Radius | 1.56 R☉ |
| Mass | 1.04 M☉ |
| Age | 5.7 billion years |
| Metallicity [Fe/H] | 0.19 |
| Right ascension (J2000) | 23h 18m 46.7s |
| Declination (J2000) | +18° 38′ 45″ |
| Space velocity (relative to the Sun) | 24.2 km/s |
In the sky
Too faint for the naked eye (magnitude 8.04); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 71° S. North of latitude 71° 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 1789. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.2 million years.
The Sun seen from there
From a planet around HD 219828, the Sun would look like a star of magnitude 9.13, in the direction where our sky has the constellation Crater. It would be invisible to the naked eye.
Planets
- HD 219828 b 3.83-day orbit · 4.59 R⊕
- HD 219828 c 4,790-day orbit · 12.2 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 114759 11.8 light-years
- HIP 114235 13.1 light-years
- HIP 113981 15.6 light-years
- HIP 115800 16.9 light-years
- HIP 115419 17.5 light-years
- HIP 115279 18.9 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.