Star · G6 V
Uklun
Uklun is a main-sequence star of spectral type G6 V in the constellation Centaurus, 128.6 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HD 102117 · HIP 57291 |
|---|---|
| Constellation | Centaurus |
| Distance | 128.6 light-years (39.4 pc) |
| Apparent magnitude | magnitude 7.47 |
| Absolute magnitude | magnitude 4.49 |
| Spectral type | G6 V |
| Surface temperature | 5,660 K |
| Luminosity | 1.44 L☉ |
| Radius | 1.23 R☉ |
| Mass | 1.06 M☉ |
| Age | 10.0 billion years |
| Metallicity [Fe/H] | 0.28 |
| Right ascension (J2000) | 11h 44m 50.5s |
| Declination (J2000) | −58° 42′ 13″ |
| Space velocity (relative to the Sun) | 52.6 km/s |
In the sky
Too faint for the naked eye (magnitude 7.47); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 31° N. South of latitude 31° 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 1897. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.3 million years.
The Sun seen from there
From a planet around Uklun, the Sun would look like a star of magnitude 7.81, in the direction where our sky has the constellation Cassiopeia. It would be invisible to the naked eye.
Planets
- HD 102117 b 20.8-day orbit · 8.47 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.