Star · K0
HD 142245
HD 142245 is a giant star of spectral type K0 in the constellation Serpens, 318.6 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 77783 |
|---|---|
| Constellation | Serpens |
| Distance | 318.6 light-years (97.7 pc) |
| Apparent magnitude | magnitude 7.46 |
| Absolute magnitude | magnitude 2.51 |
| Spectral type | K0 |
| Surface temperature | 4,920 K |
| Luminosity | 13.5 L☉ |
| Radius | 4.63 R☉ |
| Mass | 3.5 M☉ |
| Age | 2.3 billion years |
| Metallicity [Fe/H] | 0.17 |
| Right ascension (J2000) | 15h 52m 56.3s |
| Declination (J2000) | +15° 25′ 50″ |
| Space velocity (relative to the Sun) | 29.2 km/s |
In the sky
Too faint for the naked eye (magnitude 7.46); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 75° S. North of latitude 75° N it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1707. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.7 million years.
The Sun seen from there
From a planet around HD 142245, the Sun would look like a star of magnitude 9.78, in the direction where our sky has the constellation Eridanus. It would be invisible to the naked eye.
Planets
- HD 142245 b 1,300-day orbit · 13.1 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 77775 5.19 light-years
- HIP 77536 10.9 light-years
- HIP 78648 15.7 light-years
- HIP 76715 19.9 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.