description HD 217107 b Overview
HD 217107 b is a giant exoplanet orbiting the G-type star HD 217107. It completes one orbit in about 7.1 days, placing it in the hot-Jupiter class of close-in giant planets. The planet was discovered through radial-velocity measurements reported in 1998, during the early period of confirmed exoplanet discoveries, and its orbit was notable for having measurable eccentricity rather than being perfectly circular.
help HD 217107 b FAQ
How long is a year on HD 217107 b?
HD 217107 b completes one orbit in about 7.1 Earth days. That very short period places it in the hot-Jupiter class of close-in giant planets.
How was HD 217107 b discovered?
It was discovered through radial-velocity measurements of the G-type star HD 217107. The discovery was reported in 1998, during the early era of exoplanet discoveries around Sun-like stars.
Why is HD 217107 b called a hot Jupiter?
It is a giant planet with an orbit extremely close to its host star. Its roughly 7.1-day orbit means the planet receives intense stellar radiation and likely has a very hot atmosphere.
Does the HD 217107 system contain another planet?
Yes, long-term radial-velocity observations have indicated an additional outer companion in the HD 217107 system. HD 217107 b remains the short-period inner giant planet.
explore Explore More
Reviews & Comments
Write a Review
Be the first to review
Share your thoughts with the community and help others make better decisions.
