description HAT-P-13c Overview
HAT-P-13c is a reported outer planetary companion in the HAT-P-13 system, whose inner planet HAT-P-13b transits its host star. The outer body was identified through radial-velocity measurements and has a substantially longer, eccentric orbit than planet b. Its gravitational effect has been studied because an additional companion can help constrain the orbital dynamics and possible interior properties of the transiting planet.
help HAT-P-13c FAQ
How was HAT-P-13c detected?
HAT-P-13c was reported from radial-velocity measurements of the HAT-P-13 system. Unlike inner HAT-P-13b, it is described as an outer companion rather than a transiting inner planet.
What is the relationship between HAT-P-13b and HAT-P-13c?
HAT-P-13b is the inner planet and transits its host star, while HAT-P-13c is the reported outer companion. The outer body's gravity affects the system's measured motion.
Why is HAT-P-13c's orbit notable?
It has a substantially longer and more eccentric orbit than HAT-P-13b. That orbital difference is part of why radial-velocity data are important for identifying its effect on the system.
Is HAT-P-13c a confirmed transiting planet?
It is described as a reported outer planetary companion identified through radial velocity, not as the transiting planet in the system. The transiting body specifically named in the system description is HAT-P-13b.
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