1338 Duponta

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1338 Duponta is a small, stony asteroid in the inner part of the main asteroid belt. It is about 7.8 kilometers across and has a small moon about 1.8 kilometers in diameter.

Key facts
- Type and family: S-type asteroid in the Flora family (inner main belt).
- Orbit: orbits the Sun every 3.41 years (about 1,245 days) at 2.0–2.5 AU, with an eccentricity of ~0.11 and an inclination of ~4.8°.
- Rotation and satellite: rotates every ~3.8545 hours. It has a moon that orbits every ~17.57 hours; the moon is ~1.77 kilometers across and about 14 kilometers from the primary.
- Discovery and naming: discovered on 4 December 1934 by Louis Boyer at the Algiers Observatory in Algeria. Provisional designation was 1934 XA. Named after the discoverer’s nephew, Marc Dupont.
- Measurements: diameters reported around 7.47–7.88 km with albedos roughly 0.22–0.25 (NEOWISE values); adopted estimates give about 7.885 km diameter and albedo ~0.216. Absolute magnitude around 12.8.