Star · G3 V
HD 187123
HD 187123 is a main-sequence star of spectral type G3 V in the constellation Cygnus, 150.2 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Other names | HIP 97336 |
|---|---|
| Constellation | Cygnus |
| Distance | 150.2 light-years (46.0 pc) |
| Apparent magnitude | magnitude 7.83 |
| Absolute magnitude | magnitude 4.51 |
| Spectral type | G3 V |
| Surface temperature | 5,790 K |
| Luminosity | 1.34 L☉ |
| Radius | 1.15 R☉ |
| Mass | 1.04 M☉ |
| Age | 7.4 billion years |
| Metallicity [Fe/H] | 0.09 |
| Right ascension (J2000) | 19h 46m 58.1s |
| Declination (J2000) | +34° 25′ 10″ |
| Space velocity (relative to the Sun) | 44.5 km/s |
In the sky
Too faint for the naked eye (magnitude 7.83); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 56° S. North of latitude 56° 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 the year 1876. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.7 million years.
The Sun seen from there
From a planet around HD 187123, the Sun would look like a star of magnitude 8.15, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Planets
- HD 187123 b 3.1-day orbit · 14.2 R⊕
- HD 187123 c 3,810-day orbit · 13.2 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.