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VAMOR CAD – Validation of Asteroid Models by Occultation Results by Means of CAD

JOA 2023, Vol. 13, No. 2, Page 16

Author(s): Frank Schaffer, Konrad Guhl

Abstract: The combination of 3D models of asteroids obtained from rotational light curve inversion with the measured times of disappearance and reappearance from stellar occultations is realised with a new ongoing project called VAMORCAD (Validation of Asteroid Models by Occultation Results by means of CAD – a Computer Aided Design program). Graphical data (3D models and images of chords) from two different databases (DAMIT and Occult V4) are read into a commercial CAD program and positioned and edited in relation to each other to scale. In the project the occultations data are centred and positioned to the centre of the asteroid model. The result is a graphical representation of the asteroid model, in relation to all the occultations measured on it, in order to get a first impression of the spatial distribution of observations. Furthermore, automated calculations (e.g. shortest distances of the measurements to the model) as well as statistical evaluations are possible via a macro programming language embedded in the CAD program. These results can be used to optimise or adjust the size as well as the shape of the asteroid model.