32008 Adriángalád

Lore & Background

Adriángalád orbits the Sun in the inner main-belt at a distance of 1.8–2.6 AU once every 3 years and 3 months, with a semi-major axis of 2.19 AU, an eccentricity of 0.19, and an inclination of 6° to the ecliptic. It is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements, though based on osculating Keplerian orbital elements it lies in the densely populated region of the Flora family. The body's observation arc begins almost 9 years prior to its official discovery, with a precovery taken by the Steward Observatory's Spacewatch survey at Kitt Peak in November 1991.

The asteroid was named after Slovak astronomer Adrián Galád (born 1970), a discoverer of minor planets and several binary asteroids, known for his photometric observations at both Ondřejov and Modra observatories. The official naming citation was published by the Minor Planet Center on 20 June 2016. In the SDSS-based taxonomy, Adriángalád has been characterized as a bright V-type asteroid.

A rotational lightcurve obtained from photometric observations in the R-band by Czech astronomer Petr Pravec at the Ondřejov Observatory in August 2007 gave a well-defined rotation period of 3.0171±0.0001 hours with a brightness amplitude of 0.19 magnitude. During these observations it was revealed that Adriángalád is a synchronous binary system, with a minor-planet moon orbiting it every 40.24±0.02 hours. The satellite measures approximately 40% of that of its primary, with published diameters of 1.62 and 1.69 kilometers, respectively, and orbits at an estimated average distance of 13 kilometers.

Reader's Guide

32008 Adriángalád is significant as a synchronous binary system in the inner asteroid belt, providing insight into the formation and dynamics of asteroid pairs. Its discovery as a binary was made during photometric observations in August 2007 by Petr Pravec at Ondřejov Observatory, revealing a moon that orbits the primary every 40.24 hours at a distance of only 13 kilometers. The system's combined effective diameter has been estimated at 4.35 kilometers (with a primary of 4.04 km and secondary of 1.62 km) assuming an albedo of 0.16, while Johnston's archive gives an effective diameter of 4.56 km (primary 4.23 km, secondary 1.69 km) using the same diameter ratio of 0.40. The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 derived from 8 Flora and calculates a diameter of 3.07 kilometers based on an absolute magnitude of 14.73. The asteroid's V-type classification indicates a basaltic composition, linking it to the differentiation history of larger bodies. Its naming honors Adrián Galád, a Slovak astronomer who has discovered numerous minor planets and binary systems himself, reflecting the collaborative nature of asteroid research. The system's well-characterized orbit and rotation make it a valuable target for further study of binary asteroid evolution.

Did You Know?

• Its minor-planet moon, discovered in August 2007, is about 1.6 km in diameter and orbits every 40.24 hours.
• The asteroid is a V-type, indicating a basaltic surface composition.
• A precovery observation from November 1991 by the Spacewatch survey at Kitt Peak extends its observation arc nearly 9 years before discovery.