Star · G2 V
HD 222155
HD 222155 is a main-sequence star of spectral type G2 V in the constellation Andromeda, 164.7 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 116616 |
|---|---|
| Constellation | Andromeda |
| Distance | 164.7 light-years (50.5 pc) |
| Apparent magnitude | magnitude 7.11 |
| Absolute magnitude | magnitude 3.59 |
| Spectral type | G2 V |
| Surface temperature | 5,700 K |
| Luminosity | 3.23 L☉ |
| Radius | 1.85 R☉ |
| Mass | 1.21 M☉ |
| Age | 8.2 billion years |
| Metallicity [Fe/H] | -0.18 |
| Right ascension (J2000) | 23h 38m 00.3s |
| Declination (J2000) | +48° 59′ 48″ |
| Space velocity (relative to the Sun) | 70.1 km/s |
In the sky
Too faint for the naked eye (magnitude 7.11); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 41° S. North of latitude 41° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1861. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.9 million years.
The Sun seen from there
From a planet around HD 222155, the Sun would look like a star of magnitude 8.35, in the direction where our sky has the constellation Centaurus. It would be invisible to the naked eye.
Planets
- HD 222155 b 4,000-day orbit · 13.4 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 2MASS J23253519+4608098 11.2 light-years
- HIP 116222 12.4 light-years
- κ And 14.0 light-years
- HIP 117397 15.3 light-years
- HIP 114561 17.4 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.