Star · G8 IV
HD 221585
HD 221585 is a subgiant star of spectral type G8 IV in the constellation Cassiopeia, 182.0 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 116221 |
|---|---|
| Constellation | Cassiopeia |
| Distance | 182.0 light-years (55.8 pc) |
| Apparent magnitude | magnitude 7.47 |
| Absolute magnitude | magnitude 3.74 |
| Spectral type | G8 IV |
| Surface temperature | 5,620 K |
| Luminosity | 2.64 L☉ |
| Radius | 1.85 R☉ |
| Mass | 1.19 M☉ |
| Age | 6.2 billion years |
| Metallicity [Fe/H] | 0.29 |
| Right ascension (J2000) | 23h 32m 54.1s |
| Declination (J2000) | +63° 09′ 20″ |
| Space velocity (relative to the Sun) | 116.6 km/s |
In the sky
Too faint for the naked eye (magnitude 7.47); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 27° S. North of latitude 27° 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 1844. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.2 million years.
The Sun seen from there
From a planet around HD 221585, the Sun would look like a star of magnitude 8.56, in the direction where our sky has the constellation Centaurus. It would be invisible to the naked eye.
Planets
- HD 221585 b 1,170-day orbit · 13.5 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 114769 9.82 light-years
- HIP 755 15.2 light-years
- HIP 1240 16.2 light-years
- τ Cas 17.1 light-years
- HIP 116101 18.0 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.