Infrared Observations of Distant Asteroids
Abstract
We present new infrared spectra of the unusual minor planet 5145 Pholus which shows a featureless J band spectrum and does not confirm the 1.72$\mu$m feature weakly detected by Luu, Jewitt and Cloutis (1994). Revised VJHK colours of Pholus from 1992 are presented which confirm the extreme redness of the visual-IR colours. A new detection of 5145 Pholus at 20$\mu$m is combined with earlier data and suggests that the diameter of the object is 185 $\pm$ 16 km. JHK photometry of 1993HA$_2$, and an upper limit for the J magnitude of 1993FW, is presented and the VJHK colours of all three objects are discussed.
- Publication:
-
Completing the Inventory of the Solar System
- Pub Date:
- 1996
- Bibcode:
- 1996ASPC..107...97D
- Keywords:
-
- DISTANT ASTEROIDS;
- KUIPER DISK;
- 5145 PHOLUS;
- 1993HA2;
- 1993FW;
- INFRARED PHOTOMETRY;
- INFRARED SPECTRA;
- VJHK COLOURS;
- CENTAURS;
- KUIPER BELT