Interference filter photometry of periodic comet Ashbrook-Jackson

Details Interference filter photometry of periodic comet Ashbrook-Jackson Interference filter photometry of periodic comet Ashbrook-Jackson

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980stin...8033318n&link_type=abstract

Unknown

Physics

Comets, Data Reduction, Flux Density, Perihelions, Photometry, Bandpass Filters, Granular Materials, Ice, Thermal Emission

Scientific paper

P/Ashbrook-Jackson has a period of 7.43 years and comes to perihelion at 2.284 AU. It is a low inclination object (12.5 deg) of moderate eccentricity (0.400). In 1963, it made the best possible apparition, coming to perihelion and opposition virtually simultaneously, but no one made physical observations of faint periodic comets in 1963. In 1978 Ashbrook-Jackson came to opposition on Sept. 28, just 40 days after perihelion. It will be just over 100 years before an equally favorable apparition recurs. P/Ashbrook-Jackson was recovered by Pereyra at Cordoba Observatory on April 28, 1977, more than a year and a quarter before perilhelion and already showing a diffuse coma with central condensation. Its helio-centric distance was then 3.7 AU. An extensive program was planned, but equipment problems and weather ultimately limited it to the two nights of data reported here.

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