Star · G8
Xihe
Xihe is a supergiant star of spectral type G8 in the constellation Lyra, 432.8 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HD 173416 · HIP 91852 |
|---|---|
| Constellation | Lyra |
| Distance | 432.8 light-years (132.7 pc) |
| Apparent magnitude | magnitude 6.04 |
| Absolute magnitude | magnitude 0.43 |
| Spectral type | G8 |
| Surface temperature | 4,680 K |
| Luminosity | 78 L☉ |
| Radius | 13.5 R☉ |
| Mass | 2 M☉ |
| Age | 1.7 billion years |
| Metallicity [Fe/H] | -0.22 |
| Right ascension (J2000) | 18h 43m 36.1s |
| Declination (J2000) | +36° 33′ 24″ |
| Space velocity (relative to the Sun) | 72.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.04). Visible from the whole Northern Hemisphere and south to latitude 53° S. North of latitude 53° N it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1593. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 7.7 million years.
The Sun seen from there
From a planet around Xihe, the Sun would look like a star of magnitude 10.44, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Planets
- HD 173416 b 322-day orbit · 13.4 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.