DPS Pasadena Meeting 2000, 23-27 October 2000
Session 9. Outer Planets II - Atmospheric Dynamics and Clouds
Oral, Chairs: K. Baines, G. Lockwood, Monday, 2000/10/23, 4:10-4:40pm, Little Theater (C107)

[Previous] | [Session 9] | [Next]

[9.01] How I Spent My Summer Vacation on Uranus -- HST Images

K. A. Rages (SPRI/Ames), H. B. Hammel (SSI), G. W. Lockwood (Lowell Obs.), M. Marley (NMSU)

Hubble Space Telescope images of Uranus obtained in June 2000 show several discrete clouds near the sunrise line at ~42\deg N latitude, including one with a contrast of ~2.5 at 800-1000 nm wavelength. The derived zonal wind speed of 161± 6 m/s westward at this latitude is very close to that at the equivalent southern latitude at the time of the Voyager encounter. A discrete feature detected at 39\deg S latitude has a speed of 132± 8 m/s westward, which places it right on the Voyager zonal wind profile. Latitudinal bands are visible longward of 600 nm, but not in 467-nm and 547-nm images obtained in August 2000. Center-to-limb profiles at all latitudes south of 20\deg N will be compared to vertical structure models derived from HST images obtained in 1997 to characterize long-term changes in Uranus' latitude bands.

This work was funded through Grants GO-08680 and SNAP-08634, submitted to the Space Science Telescope Institute, which is operated by the Association of Universities for Research in Astronomy.

[Previous] | [Session 9] | [Next]