Star · G2V
HD 188641
HD 188641 is a main-sequence star of spectral type G2V in the constellation Sagittarius, 209.8 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 98222 |
|---|---|
| Constellation | Sagittarius |
| Distance | 209.8 light-years (64.3 pc) |
| Apparent magnitude | magnitude 7.34 |
| Absolute magnitude | magnitude 3.30 |
| Spectral type | G2V |
| Surface temperature | 5,900 K |
| Luminosity | 4.12 L☉ |
| Radius | 1.94 R☉ |
| Mass | 1.07 M☉ |
| Metallicity [Fe/H] | -0.08 |
| Right ascension (J2000) | 19h 57m 37.2s |
| Declination (J2000) | −37° 44′ 42″ |
| Space velocity (relative to the Sun) | 36.7 km/s |
In the sky
Too faint for the naked eye (magnitude 7.34); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 52° N. South of latitude 52° S 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 the year 1816. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.7 million years.
The Sun seen from there
From a planet around HD 188641, the Sun would look like a star of magnitude 8.87, in the direction where our sky has the constellation Lynx. It would be invisible to the naked eye.
Planets
- HD 188641 b 14,600-day orbit · 11.9 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 98560 12.4 light-years
- HIP 99139 14.1 light-years
- HIP 99668 14.3 light-years
- ι Sgr 17.2 light-years
- HIP 98972 17.8 light-years
- HIP 99132 18.4 light-years
- HIP 98287 18.8 light-years
- HIP 96713 19.0 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.