Observations of faint comets at McDonald Observatory: 1978-1980

Details Observations of faint comets at McDonald Observatory: 1978-1980 Observations of faint comets at McDonald Observatory: 1978-1980

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981motc.conf..150b&link_type=abstract

In JPL Mod. Observational Tech. for Comets p 150-155 (SEE N82-13989 04-89)

Astronomy and Astrophysics

Astronomy

5

Astronomical Photometry, Comets, Magnitude, Spectrophotometry, Spectrum Analysis, Astronomical Spectroscopy, Color, Comet Nuclei, Comet Tails, Digital Techniques, Error Analysis, Reflectance

Scientific paper

Modern observational techniques, developed for spectroscopy and photometry of faint galaxies and quasars, successfully applied to faint comets on the 2.7 m telescope. The periodic comets Van Biesbrock, Ashbrook-Jackson, Schwassmann-Wachmann 1, Tempel 2, Encke, Forbes, Brooks 2, Stephan-Oterma and the new comets Bradfield (19791), Bowell (1980b), Chernis-Petrauskas (1980k) were observed. The comets ranged in magnitude from 10th to 20th magnitude. For comets fainter than 19th magnitude, reflectance spectra at 100A resolution and area photometry were obtained. On comets of 17th or 18th magnitude, spectrometric scans (6A resolution) of the nucleus or inner coma region. On those comets which are brighter than 16th magnitude spatial spectrophotometric (6A resolution) studies of the inner and extended comae were done. An extensive spatial study of the comae of P/Encke and P/Stephen-Oterma, correlated with heliocentric distance is taking place. The observing process used is described and examples of the results obtained to date are discussed.

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