Posts Tagged ‘Голдстоун’
14 сентября 2012 года, в 9:13 утра, мимо Земли пролетит достаточно крупный объект – недавно открытый астероид 2012 QG42. В момент максимального сближения, дистанция до него составит свыше 2 840 000 км, что абсолютно безопасно для жителей Земли. Максимального видимого блеска, 13.8 звездной величины, астероид достигнет двумя днями ранее. Хотя подобные астероиды считаются яркими и их пролеты достаточно редки, этого гостя смогут увидеть лишь астрономы-любители, обладающие крупными любительскими телескопа, вдали от городов.
Comet C/2010 X1 ( Elenin) may be studied with the help of one of the biggest radio telescopes in the world – Arecibo. This only very recently became known. Lance Benner answered my letter having to do with the detection of NEOs with the help of the 70 meter Goldstone radio telescope. From his words we learn that finding a comet at a distance of 0.23 a.u. is a complex task for their radio telescope. For that purpose the gigantic 300 meter Arecibo radio telescope is better suited.
According to Ellen Howell, such work has been done at Arecibo and in 30-50% of the cases it has been successful. An application for four nights of observing time in the period from September 27 to November 10, 2011 has already been sent to the committee that apportions observing time. I hope these observations will all take place and that they will be successful!
December 11-12, 2010 radiolocation was carried out of the moderately large near-Earth asteroid 2010 JL33 using the Goldstone radio telescope of the Deep Space Network (Goldstone Solar System Radar). The asteroid was discovered May 6 of last year at Mt Lemmon Observatory, and it belongs to the class of potentially hazardous objects (PHA). Radiolocation helped to determine the size and shape of the heavenly body which you can see in the illustration at left.
The form of the asteroid is slightly extended, with length on the order of 1.8 km (1.1 mile). The period of rotation on its axis is 9 hours. The most interesting detail on the surface of the asteroid is a large crater, perhaps of impact origin.
At the moment of location, the asteroid was 8.5 million km from the Earth. Although it is bright enough, optical observations were hampered by the fact that 2010 JL33 had the Milky Way in the background the whole time. The observations are another success for the team of American radio astronomers conducting regular observations on the Goldstone and Arecibo radio telescopes.