Planetary research at Lowell Observatory

Details Planetary research at Lowell Observatory Planetary research at Lowell Observatory

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986plas.rept...68b&link_type=abstract

In NASA, Washington Reports of Planetary Astronomy, 1985 p 68-70 (SEE N87-12407 03-89)

Astronomy and Astrophysics

Astronomy

Atmospheric Composition, Comet Nuclei, Cometary Atmospheres, Light Curve, Spectral Bands, Carbon Isotopes, Charge Coupled Devices, Giacobini-Zinner Comet, Halley'S Comet, Trace Elements

Scientific paper

Narrowband CCD profiles of C2 and grains in several comets (including P/Halley and P/Giacobini-Zinner) were performed. Rotational light curves were made of Comet P/Arend-Rigaux (visible and infrared) yielding the size, shape, albedo, and rotation period of the nucleus. Production rates were measured as a function of heliocentric distance for OH, CN, and C2 in P/Giacobini-Zinner and for OH, NH, CN, C3, and C2 in P/Halley. Detection and measurement was made of forbidden (O I) lines near 6300 and 5577 A in P/Halley, permitting the production rate of oxygen from CO to be distinguished from that from H2O. Identification of C-12C-13 lines in cometary spectra indicating a possible enrichment of C-13 over the telluric value was made. An assessment of techniques for detecting (determining the existence of) a trans-Neptunian comet belt is included.

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