Spectrophotometry of J8, J9, and four Trojan asteroids from 0.32 to 1.05 microns

Details Spectrophotometry of J8, J9, and four Trojan asteroids from 0.32 to 1.05 microns Spectrophotometry of J8, J9, and four Trojan asteroids from 0.32 to 1.05 microns

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...46..108s&link_type=abstract

Icarus, vol. 46, Apr. 1981, p. 108-113.

Astronomy and Astrophysics

Astronomy

15

Asteroids, Jupiter (Planet), Natural Satellites, Spectral Reflectance, Spectrophotometry, Albedo, Infrared Astronomy, Spectrum Analysis, Taxonomy, Asteroids, Trojan Asteroids, Spectrophotometry, Jupiter, Observations, Satellites, J9, Pasiphae, J8, Sinope, 617 Asteroid, 884 Asteroid, 1172 Asteroid, 1173 Asteroid, Data, Infrared, Photometry, Procedure, Spectrum, Reflectivity, Brightness, Classification, Wavelengths

Scientific paper

New 30-channel narrowband photometry from 0.32 to 1.05 microns of the retrograde Jovian satellites J9 (to 0.7 micron) and J8 and the trailing Trojan asteroids 617, 884, 1172, and 1173 is presented. The data confirm previous measurements of J8, 617, 884, and 1172 at wavelengths less than 0.8 micron, but the extension into the infrared shows that the normalized spectral reflectance of these objects rises steadily from approximately 0.8 at 0.4 micron to approximately 1.4 at 1.05 microns, suggesting they are too bright in the near infrared to be C-type asteroids. The C classification of 1173 is confirmed. J9 is markedly redder than J8 at visible wavelengths. The results indicate a greater taxonomic contrast between these distant objects and main-belt asteroids than previously thought.

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