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P/Halley: The Disconnection Event of 1986 April 11

Published online by Cambridge University Press:  12 April 2016

P.M. Bergé ,
G. Mahoux  and
A.C. Levasseur-Regourd
P.M. Bergé
Affiliation:
Residence “La Dauniere” Bat. D, F-91940 Les Ulis, France
G. Mahoux
Affiliation:
12 rue du Dr. Kurzenne, F-78350 Jouy-en-Josas, France
A.C. Levasseur-Regourd
Affiliation:
Université Paris VI, Service d’Aeronomie, F-91370 Verrières-le-Buisson, France

Extract

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This work was carried out by an expedition organized by the S.A.F. in 1986 April to La Réunion. The aim was to observe and photograph P/Halley, within the framework of IHW, as part of the Island Network in the southern hemisphere. To be more precise, our work consisted of studying large-scale phenomena: the structure, dynamics and possible disconnection events in the plasma tail. We were lucky enough to observe one of the latter on the night of April 11/12, and describe it here.

For the Island Network, IHW had a number of Schmidt telescopes (Celestron 8). One was lent to the S.A.F. and this is what we used. This telescope has a focal ratio of 1.5, with a 200-mm (8-inch) objective and 300-mm focal length. We used only Kodak TP2415 film, hypersensitized in forming gas (24h at 60°C).

Type
Part III Observations and Results
Information
International Astronomical Union Colloquium , Volume 98: Stargazers: The Contribution of Amateurs to Astronomy , 1988 , pp. 155 - 157
Copyright
Copyright © Springer-Verlag 1988

References

1. Niedner, M.B., Brandt, J.C.: Astrophys. J., 223, 655 (1978)Google Scholar
2. Niedner, M.B.: COSPAR Meeting, Toulouse, France, 1986 JulyGoogle Scholar