Star · K0IV
HD 109988
HD 109988 is a subgiant star of spectral type K0IV in the constellation Hydra, 139.2 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 61743 |
|---|---|
| Constellation | Hydra |
| Distance | 139.2 light-years (42.7 pc) |
| Apparent magnitude | magnitude 8.90 |
| Absolute magnitude | magnitude 5.75 |
| Spectral type | K0IV |
| Surface temperature | 5,190 K |
| Luminosity | 0.493 L☉ |
| Radius | 0.87 R☉ |
| Mass | 0.88 M☉ |
| Metallicity [Fe/H] | 0.14 |
| Right ascension (J2000) | 12h 39m 15.8s |
| Declination (J2000) | −32° 43′ 34″ |
| Space velocity (relative to the Sun) | 23.3 km/s |
In the sky
Too faint for the naked eye (magnitude 8.90); 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 March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1887. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
The Sun seen from there
From a planet around HD 109988, the Sun would look like a star of magnitude 7.98, in the direction where our sky has the constellation Andromeda. It would be invisible to the naked eye.
Planets
- HD 109988 b 17,100-day orbit · 12.1 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.