Comet Halley's plasma tail photographed from Germany with a focal reducer to be used at ESO's 1 m telescope.

Details Comet Halley's plasma tail photographed from Germany with a focal reducer to be used at ESO's 1 m telescope. Comet Halley's plasma tail photographed from Germany with a focal reducer to be used at ESO's 1 m telescope.

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985msngr..42....9j&link_type=abstract

The Messenger, vol. 42, p. 9-9

Physics

2

Comet 1910 Ii Halley, Cometary Tails

Scientific paper

A picture of the plasma tail of Comet Halley was obtained at the 1 m telescope of Hoher List Observatory on November 12, 21 UT. A focal reducer, combining instrumentation built at Hoher List Observatory and the Max-Planck-Institute for Aeronomy, was used. At a 1 m telescope the plate scale ofthe focal reducer very nearly equals the scale of the ESO Schmidt telescope but the field has only 25 mm diameter, corresponding to about in the sky. The exposure of Comet Halley was taken through an interference filter of a bandpass of 425 +/ -3nm, which transmits the 0-2 band of the CO+ comet tail band system. A two-stage proximity focus image intensifier was employed and 103 a- F film was pressed against its exit window. Exposure time was 15 minutes.

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