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Spectroscopic Observations of Comet Kohoutek (1973f)

Published online by Cambridge University Press:  22 February 2018

Lubos Kohoutek  and
Jurgen Rahe

Extract

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Between January 5 and January 15, 1974, nine coudé spectrograms of Comet Kohoutek (1973f) were obtained with the ESO 152-cm telescope in La Silla, Chile. The emulsion is Kodak IIa-0 (3 plates) and Kodak 103a-F (6 plates), the dispersion is 20.2 Å/mm. The useful spectral range extends from about 3500 Å to about 5000 Å (Kodak IIa-0 plates) and from about 4500 Å to about 6700 Å (Kodak 103a-F plates). The original scale was 4.55 arc sec/mm on the slit, and the full length of the slit was about 3 arc minutes. 1 mm on the plates corresponds to 66.5 arc sec, or about 3.9-4 4x104 km at the Comet projected on the plane of the sky. The slit was always centered on the image of the Comet, and except for plate No. 1436, was oriented along the radius vector. A field rotator was used which dimished the stellar light by about 30 %.

Type
Part I
Information
International Astronomical Union Colloquium , Volume 25 , Issue Part1: The Study of Comets , 1976 , pp. 159 - 181
Copyright
Copyright © NASA 1976

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