1. Photographic isophotes of comet Arend-Roland 1956h
- Creator:
- Ceplecha, Zd.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- comets, photographic isophotes, and objective Tessar
- Language:
- Czech
- Description:
- Isophotes of comet Arend-Roland were constructed from 20 photographs gained by objective Tessar 1 : 4,5, f = 18 cm. The photographs were exposed in the visible spectral region in integral light, and with orange and blue filters on panchromatic emulsion of Agfa ISS plates (21/10 Din). The plates were measured on recording microdensitometer. The extreme measurable extent of the normal tail was 7° and of the anomal tail 1,5°.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public