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Light curves of Jovian Trojan asteroids from the TESS mission

Presentation #113.05 in the session Asteroids: Observational Surveys (Oral Presentation)

Published onOct 23, 2023
Light curves of Jovian Trojan asteroids from the TESS mission

Jovian Trojans are of particular importance because they are touchstones for solar system evolution models. Despite their large number, rotational characteristics are known for a relatively limited sample of targets from ground-based observations. Rotation period and amplitude distributions derived from this sample are strongly affected by ground-based biases, as it was shown by recent studies using data from the K2 mission of the Kepler Space Telescope. The main result of these investigations is that there are a significantly larger number of slow rotators than previously thought. Month-long, uninterrupted light curve data, in many cases spanning over multiple sectors are provided by the TESS mission for a large number of Jovian Trojans. Here we present the first results of our study that could derive accurate light curves for more than 500 Jovian Trojans and provide amplitude upper limits for another three thousand. Our results are compared with the previous investigations of ground based observations and K2 measurements. We also investigate the difference between the rotational characteristics of the ‘red’ and ‘less red’ groups and between collisional families and the background population of Jovian Trojans.

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