EURONEAR – First Lightcurves and physical properties of Near Earth Asteroids

Part of the European Near Earth Asteroids Research (EURONEAR) project, in 2014 we started a survey to observe light curves of Near Earth Asteroids (NEAs) using the available telescopes of this network. This is the first paper presenting light-curves and physical properties of 17 NEAs observed by two amateur astronomers owning small facilities located in good sites, namely a 0.36 m telescope at Isaac Aznar Observatory (Aras de los Olmos, Spain) and a 0.61 m telescope at Blue Mountain Observatory (Leura, Australia). We confirm most recent or older results and find new ones.

Binary asteroid discovery IAU announcement

IAU CBET nº4440:

V. Benishek, Belgrade Astronomical Observatory; P. Pravec, P. Kusnirak, 
and H. Kucakova, Ondrejov Observatory; F. Pilcher, Organ Mesa Observatory, 
Las Cruces, NM, U.S.A.; D. Pray, Sugarloaf Mountain Observatory, South 
Deerfield, MA, U.S.A.; R. Durkee, Shed of Science Observatory, Minneapolis, 
MN, U.S.A.; A. Aznar, Astronomia Para Todos Observatories Group, «European 
Near Earth Asteroids Research» (EURONEAR) project, Spain; and F. J. Aceituno, 
Observatorio de Sierra Nevada, report that photometric observations taken 
with a 0.35-m telescope at the Sopot Observatory in Serbia, a 0.65-m telescope 
at the Ondrejov Observatory, a 0.35-m at the Organ Mesa Observatory, a 0.50-m 
telescope at the Sugarloaf Mountain Observatory, a 0.50-m telescope at the 
Shed of Science Observatory, and a 0.9-m telescope at the Observatorio de 
Sierra Nevada during Aug. 27-Sept. 28 reveal that minor planet (10132) is a 
binary system with an orbital period of 22.44 ± 0.01 hr. The primary shows 
a period of 2.5099 ± 0.0001 hr and has a lightcurve amplitude of 0.11 mag 
at solar phases 2-3 degrees, suggesting a nearly spheroidal shape. Mutual 
eclipse/occultation events that are 0.08- to 0.16-magnitude deep indicate a 
lower limit on the secondary-to-primary mean-diameter ratio of 0.28. 

The EURONEAR Lightcurve Survey

The EURONEAR Lightcurve Survey of Near Earth Asteroids

  • O. Vaduvescu, A. Aznar Macias et al. Published in Earth, Moon and Planet Journal, an international Journal of Solar System Science. 2017.

    Abstrac: This data paper presents lightcurves of 101 near Earth asteroids (NEAs) observed mostly between 2014 and 2017 as part of the EURONEAR photometric survey using 11 telescopes with diameters between 0.4 and 4.2 m located in Spain, Chile, Slovakia and Romania.

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