✦ LIBER ✦

Spatial and short-term temporal variations in Uranus’ near-infrared spectrum

✍ Scribed by J.W. Norwood; N.J. Chanover

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 590 KB
Volume: 203
Category: Article
ISSN: 0019-1035
DOI: 10.1016/j.icarus.2009.05.009

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✦ Synopsis

We obtained near-infrared spectra of Uranus at NASA's Infrared Telescope Facility during the planet's September 2006 and September 2007 oppositions. Ratios between the spectra indicate that in 2006, Uranus' methane windows appeared much brighter in the south than in the north, and that between 2006 and 2007 they grew dimmer in the south and brighter in the north; we interpret these variations to be primarily caused by changing brightness in Uranus' upper cloud layer near 2 bars.

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