About rho CrB c
rho CrB c is a common exoplanet. It lies about 57 light-years from Earth, has an equilibrium temperature near 448 K, spans roughly 5.68 Earth radii and weighs about 27.44 Earth masses.
One of at least 3 planets orbiting its star.
Common exoplanet 15 EP
rho CrB c
RA 240.2601° · Dec 33.3002° · exoplanet
Score breakdown
· 3 badgesCommon 24 pts → Uncommon
- Multi-planet system +6
- Confirmed exoplanet +5
- Neptune-like +4
Total score 15
9 more points to reach Uncommon.
Badges
- Confirmed exoplanet · +5
- Neptune-like · +4
- Multi-planet system · +6
Trivia
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 1 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 89 thousand years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 570 years in a starship at a tenth of light speed.
- Distance. 57 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1969.
Saying hello
- Say hello. A radio message and its reply would take 114 years round-trip.
Standing on it
- A year here. A full year lasts just 102 Earth days.
By the numbers
- Size. About 5.7× the width of Earth.
- Volume. About 183 Earths could fit inside it.
- Mass. About 27.4× the mass of Earth.
- Your weight. You'd weigh about 0.9× your Earth weight standing here.
- Density. Less dense than water — drop it in a big enough ocean and it would float.
- Temperature. A scorching 175°C on average.
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
- 0.823
- discovery facility
- Multiple Observatories
- discovery method
- Radial Velocity
- dist ly
- 56.97
- eccentricity
- 0.048
- eq temp k
- 448.1
- insolation
- 9.85
- mass earth
- 27.442
- name
- rho CrB c
- orbital period days
- 102.036
- radius earth
- 5.68
- sys num planets
- 3
How to see it
Like any astronomical target, rho CrB 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 rho CrB c is a common exoplanet
rho CrB c scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 9 points would lift it into a rarer tier.
That score comes from 3 science badges — Confirmed exoplanet, Neptune-like 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.