Star · M0III
HIP 77902
HIP 77902 is a giant star of spectral type M0III in the constellation Serpens, 652.0 light-years from the Sun.
| Constellation | Serpens |
|---|---|
| Distance | 652.0 light-years (199.9 pc) |
| Apparent magnitude | magnitude 5.45 |
| Absolute magnitude | magnitude −1.05 |
| Spectral type | M0III |
| Surface temperature | 3,670 K |
| Luminosity | 995 L☉ |
| Radius | 78.2 R☉ |
| Mass | 6.53 M☉ (estimated) |
| Right ascension (J2000) | 15h 54m 34.6s |
| Declination (J2000) | +20° 18′ 40″ |
| Space velocity (relative to the Sun) | 107.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.45). Visible from the whole Northern Hemisphere and south to latitude 70° S. North of latitude 70° 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 1374. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 12 million years.
The Sun seen from there
From a planet around HIP 77902, the Sun would look like a star of magnitude 11.33, 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.