J. Bauer, D. Simonelli, and B. Buratti, Jet Propulsion Laboratory, California Institute of Technology, report that photometric observations of Saturn IX, obtained with the Table Mountain Observatory 0.6-m telescope on 2003 Dec. 2-3 and 2004 Jan. 13-16 UT in support of NASA's Cassini mission, show a magnitude variation of 0.12 in Johnson V and yield an updated period of 9.2735 +/- 0.0015 hr (a factor-of-10 improvement over prior publications). The light-curve peak was at 2004 Jan. 14.308 UT, which they find corresponds to longitude 355 +/- 15 deg (sub- observer point).
International Astronomical Union Circular
- Pub Date:
- January 2004