About K2-396 b
K2-396 b is a rare exoplanet. It lies about 896.5 light-years from Earth, spans roughly 1.58 Earth radii, weighs about 3.12 Earth masses and completes an orbit every 0.67 days.
One of at least 2 planets orbiting its star.
Rare exoplanet 33 EP
K2-396 b
RA 74.6929° · Dec 17.2691° · exoplanet
Score breakdown
· 4 badgesRare 46 pts → Epic
- Ultra-short period +14
- Super-Earth +8
- Multi-planet system +6
- Confirmed exoplanet +5
Total score 33
13 more points to reach Epic.
Badges
- Confirmed exoplanet · +5
- Super-Earth · +8
- Ultra-short period · +14
- Multi-planet system · +6
Trivia
Could we get there?
- Verdict. Hopelessly far for any craft humanity can build today.
Getting there
- Aboard Voyager 1. ≈ 15.8 million years at Voyager 1's speed (17 km/s).
- Fastest probe ever. ≈ 1.4 million years even at the Parker Solar Probe's 192 km/s.
- At 10% light speed. ≈ 8965 years in a starship at a tenth of light speed.
- Distance. 896 light-years from Earth.
Look-back time
- Look-back time. The light you'd see left around the year 1130.
Saying hello
- Say hello. A radio message and its reply would take 1793 years round-trip.
Standing on it
- A year here. A full year lasts just 0.7 Earth days.
By the numbers
- Size. About 1.6× the width of Earth.
- Mass. About 3.1× the mass of Earth.
- Your weight. You'd weigh about 1.3× your Earth weight standing here.
How we found it
- Discovery. Found by K2 using the transit method.
Cosmic context
- Crowded system. One of at least 2 planets orbiting its star.
Properties
- density gcc
- 4.35
- discovery facility
- K2
- discovery method
- Transit
- dist ly
- 896.4854
- mass earth
- 3.12
- name
- K2-396 b
- orbital period days
- 0.6739
- radius earth
- 1.579
- sys num planets
- 2
How to see it
Like any astronomical target, K2-396 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 K2-396 b is a rare exoplanet
K2-396 b 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 4 science badges — Confirmed exoplanet, Super-Earth, Ultra-short period 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.