Star · G0
HD 171028
HD 171028 is a main-sequence star of spectral type G0 in the constellation Ophiuchus, 366.1 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Ophiuchus |
|---|---|
| Distance | 366.1 light-years (112.3 pc) |
| Apparent magnitude | magnitude 8.37 |
| Absolute magnitude | magnitude 3.12 |
| Spectral type | G0 |
| Surface temperature | 5,670 K |
| Luminosity | 5.41 L☉ |
| Radius | 2.47 R☉ |
| Mass | 1.53 M☉ |
| Age | 8.6 billion years |
| Metallicity [Fe/H] | -0.48 |
| Right ascension (J2000) | 18h 32m 15.5s |
| Declination (J2000) | +6° 56′ 45″ |
| Space velocity (relative to the Sun) | 27.9 km/s |
In the sky
Too faint for the naked eye (magnitude 8.37); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 83° S. 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 1660. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.5 million years.
The Sun seen from there
From a planet around HD 171028, the Sun would look like a star of magnitude 10.08, in the direction where our sky has the constellation Monoceros. It would be invisible to the naked eye.
Planets
- HD 171028 b 550-day orbit · 13.2 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.