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Public Universe

Exoplanet

iot Dra b

102.18 light-years

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Discovery
Radial Velocity · 2002
Radius
12.4 Earth radii
Mass
3,756.7318 (+133.4879 / −130.3096) Earth masses
Orbital period
510.8544 (+0.0128 / −0.0128) days
Semi-major axis
1.453 (+0.026 / −0.026) AU
Equilibrium temperature
618.67 (+11.95 / −11.95) K
Mass provenance
Msini

Measurements may come from different studies and need not form one self-consistent model. “Msini” is a minimum mass; a mass inferred from radius is an estimate. Equilibrium temperature is a model estimate, not a measured surface temperature or evidence of habitability.

NASA archive record and references ↗

Snapshot retrieved: 2026-10-11T04:15:07.688253+00:00