innerbanor

Innerbanor is a term used in astronomy and planetary science to denote orbital paths that lie closer to the central body than other reference orbits within a system. The exact boundary between innerbanor and outer orbits is not fixed and varies by context; it is typically defined relative to a system’s characteristic scale, such as the extent of a protoplanetary disk, the separation of a binary star, or the semi-major axes of known planets.

In planetary systems, innerbanor commonly describe orbits of close-in planets or debris located inside a defined radius, for example inside the snow line or within a few astronomical units of a sun-like star. In binary-star systems, innerbanor refer to orbits around one member of the binary that lie within the binary separation. In protoplanetary disks, the inner region inside a disk cavity or the inner edge of the disk is sometimes described as the innerbanor.

Dynamics in the innerbanor region are shaped by stronger stellar gravity, tidal forces, and radiation. Evolution is influenced by resonant interactions with other bodies, tidal dissipation, and in some cases rapid orbital migration. The orbital periods for innerbanor bodies span a wide range, from hours for very close-in objects to years in wider systems, depending on stellar mass and distance.

Observation and study of innerbanor bodies often rely on transit photometry and radial-velocity measurements for exoplanets, as well as dynamical modeling to understand migration histories and system architectures. See also orbital mechanics, exoplanet, circumbinary orbit, protoplanetary disk.