Star · K2III
HIP 28139
HIP 28139 is a giant star of spectral type K2III in the constellation Orion, 339.5 light-years from the Sun.
| Constellation | Orion |
|---|---|
| Distance | 339.5 light-years (104.1 pc) |
| Apparent magnitude | magnitude 5.89 |
| Absolute magnitude | magnitude 0.80 |
| Spectral type | K2III |
| Surface temperature | 4,490 K |
| Luminosity | 75.1 L☉ |
| Radius | 14.3 R☉ |
| Mass | 3.12 M☉ (estimated) |
| Right ascension (J2000) | 5h 56m 49.5s |
| Declination (J2000) | +11° 31′ 16″ |
| Space velocity (relative to the Sun) | 61.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.89). Visible from the whole Northern Hemisphere and south to latitude 78° S. North of latitude 78° N it never sets. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1687. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.0 million years.
The Sun seen from there
From a planet around HIP 28139, the Sun would look like a star of magnitude 9.92, in the direction where our sky has the constellation Serpens. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.