Occultation-based Size and Shape of (269) Justitia

Le résumé fourni par la source

Abstract We present results from an occultation of a star by the asteroid (269) Justitia on 2023 August 31 UT using a deployment of 34 stations. Of the deployed stations, 29 were successful in collecting useful data and 19 recorded a positive occultation event. All stations were regularly spaced 2.45 km apart in the cross-track direction to cover ±3σ of the ephemeris uncertainty with a planning diameter of 59 km. We find that the shape of Justitia is irregular, with large-scale facets and a circular-equivalent radius in the range of 28.5–28.9 km. The inferred albedo is p V = 0.072 ± 0.007 using a rotation-corrected absolute magnitude of H V = 9.72. Astrometry from the occultation is provided.

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