Kepler-452b orbits its star in roughly how many Earth days?

Kepler-452b orbits its star in roughly 385 Earth days. Its measured period is about 384.843 days, making its year strikingly similar in length to Earth’s 365.25-day year.

NASA’s Kepler space telescope found Kepler-452b through the transit method, observing the slight, regular dimming that occurs when the planet passes across its star. The discovery was announced in 2015. Kepler-452b circles a star that resembles the Sun and travels at about 1.04 astronomical units, slightly farther out than Earth’s orbit.

The familiar “Earth cousin” description should not be taken to mean that the planet is a second Earth. Kepler-452b is about 1.6 times Earth’s radius and probably several times Earth’s mass, but its true composition and atmosphere remain uncertain. Its host star is also older and somewhat more luminous than the Sun, so receiving a similar orbital distance does not guarantee identical climate conditions. The 511-day figure belongs to other exoplanet comparisons, not Kepler-452b’s orbital period.