Observations of comets C/2002 T7 (LINEAR) and 2P/Encke at Andrushivka

Abstract

Photometric and spectral observations of C/2002 T7 (LINEAR) and 2P/Encke were made with the Zeiss-600 telescope at the Andrushivka Astronomical Observatory in November 2003. CCD imaging of the comets was carried out with narrowband HB filters CN, RC, and BC. The total number of CN molecules, gas production rate for CN, and Afρ value for the dust coma were obtained. The optical spectra of Comet C/2002 T7 (LINEAR) were obtained and reduced for the wavelength range 4200–7300 Å. The reddening gradient is derived for the