About HD 222155 b
HD 222155 b is a common exoplanet. It lies about 165.1 light-years from Earth, has an equilibrium temperature near 165 K, spans roughly 13.4 Earth radii and weighs about 581.63 Earth masses.
About 13.4× the width of Earth.
Common exoplanet 19 EP
HD 222155 b
RA 354.5026° · Dec 48.9960° · exoplanet
Score breakdown
· 3 badgesCommon 24 pts → Uncommon
- Long-period world +10
- Confirmed exoplanet +5
- Gas giant +4
Total score 19
5 more points to reach Uncommon.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Long-period world · +10
Trivia
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 2.9 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 257.7 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 1651 years in a starship at a tenth of light speed.
- Distance. 165 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1861.
Saying hello
- Say hello. A radio message and its reply would take 330 years round-trip.
Standing on it
- A year here. A full year lasts about 10.9 Earth years.
By the numbers
- Size. About 13.4× the width of Earth.
- Volume. About 2406 Earths could fit inside it.
- Mass. Roughly 582× Earth's mass — about 1.8 Jupiters.
- Your weight. You'd weigh about 3.2× your Earth weight standing here.
- Temperature. A frigid -108°C — colder than dry ice.
How we found it
- Discovery. Found by Haute-Provence Observatory using the radial velocity method.
Properties
- density gcc
- 1.33
- discovery facility
- Haute-Provence Observatory
- discovery method
- Radial Velocity
- dist ly
- 165.0604
- eccentricity
- 0.16
- eq temp k
- 164.93
- insolation
- 0.1222
- mass earth
- 581.626
- name
- HD 222155 b
- orbital period days
- 3999
- radius earth
- 13.4
- sys num planets
- 1
How to see it
Like any astronomical target, HD 222155 b is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.
Why HD 222155 b is a common exoplanet
HD 222155 b scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 5 points would lift it into a rarer tier.
That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Long-period world — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.