Star · K1 IV
HD 210702
HD 210702 is a giant star of spectral type K1 IV in the constellation Pegasus, 176.7 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 109577 |
|---|---|
| Constellation | Pegasus |
| Distance | 176.7 light-years (54.2 pc) |
| Apparent magnitude | magnitude 5.93 |
| Absolute magnitude | magnitude 2.26 |
| Spectral type | K1 IV |
| Surface temperature | 4,910 K |
| Luminosity | 10.9 L☉ |
| Radius | 4.54 R☉ |
| Mass | 1.33 M☉ |
| Age | 2.1 billion years |
| Metallicity [Fe/H] | -0.02 |
| Right ascension (J2000) | 22h 11m 51.3s |
| Declination (J2000) | +16° 02′ 26″ |
| Space velocity (relative to the Sun) | 16.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.93). Visible from the whole Northern Hemisphere and south to latitude 74° S. North of latitude 74° N it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1849. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.1 million years.
The Sun seen from there
From a planet around HD 210702, the Sun would look like a star of magnitude 8.50, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Planets
- HD 210702 b 356-day orbit · 13.6 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 110354 7.34 light-years
- HIP 110650 10.7 light-years
- HIP 109450 13.4 light-years
- GJ 4261 13.6 light-years
- 2MASS J22295358+1556180 16.6 light-years
- TOI-5947 17.1 light-years
- HIP 110218 17.4 light-years
- HIP 109440 18.1 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.