The bare nucleus of comet Neujmin 1

Details The bare nucleus of comet Neujmin 1 The bare nucleus of comet Neujmin 1

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...316..847c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 316, May 15, 1987, p. 847-857.

Astronomy and Astrophysics

Astrophysics

80

Comet Nuclei, Spectrophotometry, Coma, Gases, Infrared Photometry, Spectral Reflectance, Thermal Emission, Visible Spectrum

Scientific paper

Simultaneous visible and infrared observations of P/Neujmin 1 1984c obtained from CTIO in 1984 August yield evidence that cometary nuclei are physically similar to some classes of asteroids, and hence that cometary nuclei may evolve into asteroids, as suggested by dynamical arguments. The comet showed a faint but detectable gaseous coma with "normal" relative abundances of OH, CN, C2, and C3. No detectable coma dust was found. The nucleus is nonspherical. Measurements of the thermal emission at two extremes of the light curve yield effective radiometric radii of 8.8 and 10.6 km and geometric albedos of 0.02 and 0.03. The 0.3650 - 2.2 μm reflectance (through six filters) of the comet is compared with that of four asteroids observed on the same nights.

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