About GJ 433 c
GJ 433 c is a rare exoplanet. It lies about 29.6 light-years from Earth, has an equilibrium temperature near 54 K, spans roughly 6.27 Earth radii and weighs about 32.42 Earth masses.
A deep-frozen world far from its star's warmth.
Rare exoplanet 33 EP
GJ 433 c
RA 173.8619° · Dec -32.5436° · exoplanet
Score breakdown
· 5 badgesRare 46 pts → Epic
- Long-period world +10
- Frozen world +8
- Multi-planet system +6
- Confirmed exoplanet +5
- Gas giant +4
Total score 33
13 more points to reach Epic.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Frozen world · +8
- Long-period world · +10
- Multi-planet system · +6
Trivia
What makes it special
- Frozen world. A deep-frozen world far from its star's warmth.
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 519.5 thousand years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 46.2 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 296 years in a starship at a tenth of light speed.
- Distance. 29.6 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1996.
Saying hello
- Say hello. A radio message and its reply would take 59.1 years round-trip.
Standing on it
- A year here. A full year lasts about 13.9 Earth years.
By the numbers
- Size. About 6.3× the width of Earth.
- Volume. About 246 Earths could fit inside it.
- Mass. About 32.4× the mass of Earth.
- Your weight. You'd weigh about 0.8× your Earth weight standing here.
- Density. Less dense than water — drop it in a big enough ocean and it would float.
- Temperature. A frigid -219°C — colder than dry ice.
How we found it
- Discovery. Found by Multiple Observatories using the radial velocity method.
Cosmic context
- Crowded system. One of at least 3 planets orbiting its star.
Properties
- density gcc
- 0.723
- discovery facility
- Multiple Observatories
- discovery method
- Radial Velocity
- dist ly
- 29.5646
- eccentricity
- 0.12
- eq temp k
- 53.76
- insolation
- 0.0009
- mass earth
- 32.422
- name
- GJ 433 c
- orbital period days
- 5094.105
- radius earth
- 6.27
- sys num planets
- 3
How to see it
Like any astronomical target, GJ 433 c 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 GJ 433 c is a rare exoplanet
GJ 433 c scores 33 points on Spacedle's rarity scale, which places it in the rare tier. Another 13 points would lift it into a rarer tier.
That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Frozen world, Long-period world and Multi-planet system — 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.