Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-08-29
Astronomy and Astrophysics
Astrophysics
Accepted to Icarus 2008-Aug-19. 19 pages total, including 4 figures and 1 table
Scientific paper
10.1016/j.icarus.2008.08.001
We report a multi-week sequence of B-band photometric measurements of the dwarf planet Eris using the {\it Swift} satellite. The use of an observatory in low-Earth orbit provides better temporal sampling than is available with a ground-based telescope. We find no compelling evidence for an unusually slow rotation period of multiple days, as has been suggested previously. A $\sim$1.08 day rotation period is marginally detected at a modest level of statistical confidence ($\sim$97%). Analysis of the combination of the $Swift$ data with the ground-based B-band measurements of \citet{2007AJ....133...26R} returns the same period ($\sim$1.08 day) at a slightly higher statistical confidence ($\sim$99%).
Brown Michael E.
Pike Rosemary E.
Roe Henry Garfitt
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