https://en.wikipedia.org/wiki/Tropic_of_Cancer
The Tropic of Cancer's position is not fixed, but constantly changes because of a slight wobble in the Earth's longitudinal alignment relative to the ecliptic, the plane in which the Earth orbits around the Sun. Earth's axial tilt varies over a 41,000-year period from 22.1 to 24.5 degrees, and as of 2000 is about 23.4 degrees, which will continue to remain valid for about a millennium. This wobble means that the Tropic of Cancer is currently drifting southward at a rate of almost half an arcsecond (0.468″) of latitude, or 15 m (49 ft), per year. The circle's position was at exactly 23° 27′N in 1917 and will be at 23° 26'N in 2045.[2] The distance between the Antarctic Circle and the Tropic of Cancer is essentially constant as they move in tandem. This is based on an assumption of a constant equator, but the precise location of the equator is not truly fixed. See: equator, axial tilt and circles of latitude for additional details.
https://earthscience.stackexchange.com/questions/11913/does-the-elliptical-orbit-of-the-earth-have-effect-on-earths-climate
Questions
Does the elliptical orbit of the Earth have effect on Earth's climate?
Short answer. When the Earth is closest to the sun in January that softens the seasonal variation in the Northern Hemisphere and it increases the seasonal variation in the Southern Hemisphere, so for now, in the Northern Hemisphere, the Summers are colder than they would be with a circular orbit and the winters are hotter. The opposite is true in the Southern Hemisphere.
Overall the eccentricity variation doesn't change how much solar energy hits the Earth by much, so it's not the total solar energy. It's when combined with precession, and the effect on the seasons, that the global effect can be significant.
If we had a perfectly circular obit then the only Milankovich cycle that would matter would be axial tilt. Ice ages would either be on a 41,000 year cycle - very neat and tidy, or they wouldn't happen at all cause the orbital variation wouldn't be enough to get ice ages started. Other factors, like solar minimums could play a role and over longer periods of time, continental drift and variations in plant life, so, maybe not that exactly that, but I think it's likely.