Star · K0
HIP 72139
HIP 72139 is a giant star of spectral type K0 in the constellation Boötes, 509.2 light-years from the Sun.
| Constellation | Boötes |
|---|---|
| Distance | 509.2 light-years (156.1 pc) |
| Apparent magnitude | magnitude 6.15 |
| Absolute magnitude | magnitude 0.18 |
| Spectral type | K0 |
| Surface temperature | 5,160 K |
| Luminosity | 93.1 L☉ |
| Radius | 12.1 R☉ |
| Mass | 3.32 M☉ (estimated) |
| Right ascension (J2000) | 14h 45m 20.6s |
| Declination (J2000) | +18° 53′ 06″ |
| Space velocity (relative to the Sun) | 16.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.15). Visible from the whole Northern Hemisphere and south to latitude 71° S. North of latitude 71° N it never sets. 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 1517. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 9.0 million years.
The Sun seen from there
From a planet around HIP 72139, the Sun would look like a star of magnitude 10.80, in the direction where our sky has the constellation Eridanus. 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.