Star · G5II
HIP 100434
HIP 100434 is a bright giant star of spectral type G5II in the constellation Cygnus, 2,084 light-years from the Sun.
| Constellation | Cygnus |
|---|---|
| Distance | 2,084 light-years (638.9 pc) |
| Apparent magnitude | magnitude 6.38 |
| Absolute magnitude | magnitude −2.65 |
| Spectral type | G5II |
| Surface temperature | 4,700 K |
| Luminosity | 1,570 L☉ |
| Radius | 59.6 R☉ |
| Mass | 7.43 M☉ (estimated) |
| Right ascension (J2000) | 20h 22m 03.1s |
| Declination (J2000) | +41° 07′ 56″ |
| Space velocity (relative to the Sun) | 18.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.38). Visible from the whole Northern Hemisphere and south to latitude 49° S. North of latitude 49° N it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around 59 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 37 million years.
The Sun seen from there
From a planet around HIP 100434, the Sun would look like a star of magnitude 13.86, in the direction where our sky has the constellation Puppis. 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.