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Visible Spectroscopy of Possible Cometary Candidates

1996; Elsevier BV; Volume: 122; Issue: 1 Linguagem: Inglês

10.1006/icar.1996.0114

1090-2643

M. Lazzarin, M. A. Barucci, A. Doressoundiram,

Mass Spectrometry Techniques and Applications

It is now accepted that comets and asteroids are not two well-separated classes of objects. In particular, several peculiar objects have been recognized to resemble comets in several aspects: chemical, dynamical, and/or physical. In this context we spectroscopically observed in the visible region three strong cometary candidates: 944 Hidalgo, 2201 Oljato, and 3200 Phaethon. The spectrum of Hidalgo obtained has a reflectivity slope similar to those of known cometary nuclei. Phaethon shows a spectrum with a negative slope. The spectrum of Oljato shows a strong absorption feature around 0.9 μm which is suggestive of the presence of aqueous altered materials. No clear signs of cometary activity have been found in the spectra of these objects.