Star · ?
HIP 107129
HIP 107129 is a supergiant star of spectral type ? in the constellation Cygnus, 1,939 light-years from the Sun.
| Constellation | Cygnus |
|---|---|
| Distance | 1,939 light-years (594.4 pc) |
| Apparent magnitude | magnitude 5.98 |
| Absolute magnitude | magnitude −2.89 |
| Spectral type | ? |
| Surface temperature | 2,980 K |
| Luminosity | 22,500 L☉ |
| Radius | 565 R☉ |
| Mass | 15.9 M☉ (estimated) |
| Right ascension (J2000) | 21h 42m 01.1s |
| Declination (J2000) | +35° 30′ 37″ |
| Space velocity (relative to the Sun) | 16.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.98). Visible from the whole Northern Hemisphere and south to latitude 54° S. North of latitude 54° N it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 87. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 34 million years.
The Sun seen from there
From a planet around HIP 107129, the Sun would look like a star of magnitude 13.70, in the direction where our sky has the constellation Antlia. 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.