Photoelectric photometry of Comet Bradfield (1987s)

Details Photoelectric photometry of Comet Bradfield (1987s) Photoelectric photometry of Comet Bradfield (1987s)

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989em%26p...44...25p&link_type=abstract

Earth, Moon, and Planets (ISSN 0167-9295), vol. 44, Jan. 1989, p. 25-27.

Astronomy and Astrophysics

Astronomy

Comet Heads, Electrophotometry, Ubv Spectra, Astronomical Photometry, Comet Nuclei, Orbital Elements

Scientific paper

UBV observations of the head of Comet Bradfield (1987s) were obtained during six nights in December 1987. Magnitude and intensity variations and color indices were estimated for three circular zones in the center of the cometary head. It is suggested that the sudden rise in brightness observed on December 14 may be due to the enhanced solar activity noted 12 h prior to the cometary observations. The observed decrease in U-B may be due to the difference in scale lengths for the destruction of the CN (in the U system) and C2 (in the B and V systems) molecules.

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