Star · K0
HD 128311
HD 128311 is a main-sequence star of spectral type K0 in the constellation Boötes, 53.2 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Other names | GJ 3860 · HIP 71395 |
|---|---|
| Constellation | Boötes |
| Distance | 53.2 light-years (16.3 pc) |
| Apparent magnitude | magnitude 7.48 |
| Absolute magnitude | magnitude 6.42 |
| Spectral type | K0 |
| Surface temperature | 4,970 K |
| Luminosity | 0.308 L☉ |
| Radius | 0.76 R☉ |
| Mass | 0.828 M☉ |
| Age | 1.0 billion years |
| Metallicity [Fe/H] | 0.08 |
| Right ascension (J2000) | 14h 36m 00.6s |
| Declination (J2000) | +9° 44′ 48″ |
| Space velocity (relative to the Sun) | 26.9 km/s |
In the sky
Too faint for the naked eye (magnitude 7.48); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 80° S. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1973. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 944 thousand years.
The Sun seen from there
From a planet around HD 128311, the Sun would look like a star of magnitude 5.89, in the direction where our sky has the constellation Cetus. It would be visible to the naked eye.
Planets
- HD 128311 b 453-day orbit · 13.5 R⊕
- HD 128311 c 922-day orbit · 13 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.