The EURONEAR Lightcurve Survey of Near Earth Asteroids 2017-2020

Vaduvescu, O.; Aznar Macias, A.; Wilson, T. G.; Zegmott, T.; Pérez Toledo, F. M.; Predatu, M.; Gherase, R.; Pinter, V.; Pozo Nunez, F.; Ulaczyk, K.; Soszyński, I.; Mróz, P.; Wrona, M.; Iwanek, P.; Szymanski, M.; Udalski, A.; Char, F.; Salas Olave, H.; Aravena-Rojas, G.; Vergara, A. C.; Saez, C.; Unda-Sanzana, E.; Alcalde, B.; de Burgos, A.; Nespral, D.; Galera-Rosillo, R.; Amos, N. J.; Hibbert, J.; López-Comazzi, A.; Oey, J.; Serra-Ricart, M.; Licandro, J.; Popescu, M.
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Earth Moon and Planets

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This is the fourth data paper publishing lightcurve survey work of 52 Near Earth Asteroids (NEAs) using 10 telescopes available to the EURONEAR network between 2017 and 2020. Forty six targets were not observed before our runs (88% of the sample) but some of these were targeted during the same oppositions mainly by Brian Warner. We propose new periods for 20 targets (38% of the sample), confirming published data for 20 targets, while our results for 8 targets do not match published data. We secured periods for 15 targets (29% of the sample), candidate periods for 23 objects (44%), tentative periods for 11 asteroids (21%), and have derived basic information about 3 targets (6% of the sample). We calculated the lower limit of the ellipsoid shape ratios a/b for 46 NEAs (including 13 PHAs). We confirmed or suggested 4 binary objects, recommending two of them for follow-up during future dedicated campaigns.
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