Star · K4 III
HD 139357
HD 139357 is a giant star of spectral type K4 III in the constellation Draco, 370.2 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 76311 |
|---|---|
| Constellation | Draco |
| Distance | 370.2 light-years (113.5 pc) |
| Apparent magnitude | magnitude 5.97 |
| Absolute magnitude | magnitude 0.70 |
| Spectral type | K4 III |
| Surface temperature | 4,700 K |
| Luminosity | 66.5 L☉ |
| Radius | 11.5 R☉ |
| Mass | 2.69 M☉ |
| Age | 3.1 billion years |
| Metallicity [Fe/H] | -0.13 |
| Right ascension (J2000) | 15h 35m 16.2s |
| Declination (J2000) | +53° 55′ 20″ |
| Space velocity (relative to the Sun) | 13.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.97). Visible from the whole Northern Hemisphere and south to latitude 36° S. North of latitude 36° 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 1656. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.6 million years.
The Sun seen from there
From a planet around HD 139357, the Sun would look like a star of magnitude 10.10, in the direction where our sky has the constellation Reticulum. It would be invisible to the naked eye.
Planets
- HD 139357 b 1,120-day orbit · 12.1 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.