We report on accurate BVRI photometry for the two Uranian irregular satellites Sycorax and Caliban. We derive colors showing that Sycorax is bluer than Caliban. Our data allow us to detect a significant variability in Caliban's light curve, which suggests an estimated period of about 3 hr. Although it is the brighter of the two bodies, Sycorax does not display a strong, statistically significant variability. However, our data seem to suggest a period of about 4 hr. Based on observations carried out at ESO La Silla (Chile). See the Asteroid Properties Database (1993), http://pdssbn.astro.umd.edu/sbnhtml/.
The Astronomical Journal
- Pub Date:
- May 2001
- Planets and Satellites: General;
- Planets and Satellites: Individual: Caliban;
- Planets and Satellites: Individual: Sycorax;
- 17 pages, 2 eps figures, in press in Astronomical Journal