Other
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250c.503t&link_type=abstract
In ESA, Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 3: Posters p 503-507 (SEE N87-26714
Other
3
Asteroids, Color, Cometary Atmospheres, Comets, Halley'S Comet, Astronomical Photometry, Atmospheric Refraction, Continuums, Space Observations (From Earth)
Scientific paper
Early observations of P/Halley were made with broad-band BVJK filters when a substantial fraction of the light came from the nucleus; the resulting colors appear to be somewhat red, but with signal-to-noise ratios of 5 or less. More recent observations were made with the narrower International Halley Watch continuum filters when the light from the comet was dominated by the coma. The colors over the wavelength range 0.3 - 0.7 μm were more neutral. Continuum colors have also been observed for several other comets. All show moderately red to very red colors that can be best matched by asteroids of the P and D spectral classes, suggesting that the refractory component of comets is similar to that of the more distant asteroids.
Cruickshank D. P.
Hammel Heidi Beth
Hartmann William K.
Lark N.
Piscitelli Joseph R.
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