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Images obtained by Anthony Wesley from Australia on 19th July 2009 show a new dark spot in Jupiter’s South Polar Region whose morphology differs from “normal features” in Jupiter, strongly suggesting that it was caused by a cometary or asteroidal impact. This seems confirmed by later observations in the infrarred range that indicate a warming in the upper troposphere and lower stratosphere of Jupiter.We urge observations of this spot in any spectral range in order to follow its evolution. Since NEW IMPACTS can occur, we strongly suggest obtaining Jupiter images in any longitude. See the initial report and ephemeris of the impact spot visibility for planning observations
in the News section
The International Outer Planets
Watch (IOPW) is an informal organization of astronomers and planetary
scientists who are interested in the study of the Solar System's giant planets,
their atmospheres, satellites, rings, magnetospheres, aurorae, and other phenomena.
For this purpose, the International Outer Planets Watch has a Steering Committee
and six discipline groups.
The Atmosphere Discipline of the IOPW is devoted to coordinate and
encourage observations of the atmospheres of the giant planets and their satellites,
from the Earth and from space, with an emphasis on time-variable phenomena.
Our logo is a composition of images from Voyager and Hubble Space Telescope.
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International Outer Planets Watch - Atmosphere Discipline |
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Discipline Leader  Web Site Manager Web Page Designer |
Ricardo Hueso Alonso  Jon J. Legarreta Etxagibel  Irma T. Flores Mendoza  |
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Occasionally we will send you bulletins on Jupiter or Saturn observations.