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Kepler-1223 b

Kepler-1223 b is a hot Earth-size planet orbiting an orange star 1,500 ly away. A year there lasts 16.3 days. It was found using the transit method: it dims its star as it passes in front. Note: its mass is estimated from its size.

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Gravity13.05 m/s²1.33× Earth estimated

Size1.22× Earthradius measured

Mass1.98× Earthestimated

Temperature≈ 284 °Cequilibrium temperature measured

Distance1,500 light-yearsfrom the Sun

Its star4,870 Kan orange dwarf

One year16.3 daystime to orbit its star

Discovered2016transit

What it would be like in Worldwalk imagined

Nobody has seen the surface of Kepler-1223 b. The game builds it from the real numbers above: you land on bare, cratered rock with no air.

Air: None (bare rock). Surface pressure: almost none.
A 70 kg explorer would feel like 93 kg.
A jump that clears 50 cm on Earth would reach about 38 cm.
With almost no air, a hammer and a feather fall side by side, and sound cannot travel.

Pack the right suit. Choose 3 of 6 modules (cooling, heating, pressure hull, extra oxygen, radiation shield, jetpack), complete 3 surveys and get back to the lander before your oxygen runs out.

Play Kepler-1223 b

Similar worlds nearby

Kepler-105 c1,498 light-years Kepler-1185 b1,498 light-years Kepler-1481 b1,497 light-years Kepler-1576 b1,503 light-years Kepler-1957 b1,503 light-years Kepler-450 d1,487 light-years

Sizes, masses, temperatures and orbits come from the NASA Exoplanet Archive (Planetary Systems Composite table). Values marked estimated are calculated from the other measurements; the surface and air are imagined for the game.