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Week 41


Comet of the Week: Donati 1858 VI

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Special Topic: 2008 TC3 and the Almahata Sitta Meteorite

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OCTOBER 4, 2020: The main-belt asteroid (1679) Nevanlinna will occult the 7th-magnitude star HD 224945 in Pisces. The predicted path of the occultation crosses Newfoundland, part of the Maritime Provinces of Canada, the northeastern through the south-central U.S. (including Houston, Texas), north-central Mexico (including the northern regions of Monterrey, Nuevo Leon), and the southern Pacific …

Perihelion: 1858 September 30.46, q = 0.578 AU  Among the many individuals who made important contributions to astronomy during the mid-19th Century was the Italian astronomer Giovanni Donati, who observed from the Observatory of Florence and who was Director of that institution from 1864 until his death (at age 46) in 1873. He made the …

The “Special Topics” presentation three weeks ago discussed actions that we might take should we detect an asteroid that appears will impact Earth. The first and foremost task is the collection of as much data as possible in order to refine the orbit and the likelihood of an actual impact, and if this continues to …