Bibcode
Ziffer, Julie; Campins, Humberto; Licandro, J.; Pinilla-Alonso, Noemi; Fernandez, Yanga; Bus, Schelte J.
Bibliographical reference
Earth, Moon, and Planets, Volume 97, Issue 3-4, pp. 203-212
Advertised on:
12
2005
Citations
2
Refereed citations
2
Description
We present near infrared reflectance spectra from 0.8 to 2.5 μm of
two asteroids with low Tisserand invariant, 1373 Cincinnati and 2906
Caltech. We compare our spectra with cometary nuclei and other asteroids
in their class. Asteroids Cincinnati and Caltech have Tisserand
invariant values of 2.72 and 2.97, respectively, values less than 3 are
considered suggestive of cometary origin. The observed spectral slopes
in the near-infrared are consistent with both the spectra of cometary
nuclei and of primitive asteroids. However, both asteroids have features
in the near-infrared that are not seen in cometary nuclei, but are
present in other X-type asteroids. 1373 Cincinnati has a sharp slope
change between 0.75 and 1.0 μm and 2906 Caltech has a broad and
shallow absorption between 1.35 and 2.2 μm. Our attempts to model the
visible and near-infrared spectrum of these two objects, with the
components successfully used by Emery and Brown (2004, Icarus 164, 104
121) to fit Trojan asteroids, did not yield acceptable fits.