Interestingly, the most distant [TNOs], with semimajor axes greater than 150 AU and perihelia beyond Neptune, also seem to have values for such angles comparable to those of Sedna and 2012 VP113. (creationscience.com)
Because of that, the Earth's orbital semimajor axis must slowly increase. (wattsupwiththat.com)
The semimajor axis of the planet is closer relative to that of its hierarchical triple - star system than for any known exoplanet within a stellar binary or triple, making HD 131399 dynamically unlike any other known system. (science.sciencemag.org)