Dallorbita

Dallorbita is a small, irregularly shaped minor planet that orbits in the inner edge of the main asteroid belt between Mars and Jupiter. It was first observed on 7 August 1998 by the Sloan Digital Sky Survey using a 1.5‑meter telescope in Arizona. Its provisional designation was 1998 PA₃, and it was later given the permanent number 42079 and the name “Dallorbita” in 2003 in honor of the Italian astronomer L. Dall'Orbit, who first predicted the existence of such bodies using dynamical simulations.

The object has an estimated diameter of approximately 7 kilometers, based on an absolute magnitude of 14.2 and an assumed albedo of 0.15. Photometric light‑curve observations indicate a rotation period of 5.7 hours, with a brightness variation of 0.4 magnitudes, suggestive of a non‑spherical shape. Spectral analysis classifies Dallorbita as a C-type (carbonaceous) asteroid, showing a featureless, dark spectrum typical of primitive material.

Dallorbita follows an orbit with a semimajor axis of 2.19 AU, eccentricity of 0.08 and inclination of 12.9° to the ecliptic. Its perihelion distance is 2.02 AU and aphelion distance is 2.36 AU. These orbital parameters place it in the outer region of the inner belt, where many similar carbonaceous objects are found.

Studying Dallorbita contributes to understanding the composition and dynamical evolution of the asteroid belt, offering clues to the distribution of primitive materials in the early solar system. Its relatively small size and stable orbit make it a target for future mission concepts aimed at sampling C‑type asteroids for in‑situ mineralogical analysis.