From spencer Thu Feb  4 10:12:15 1993
From spencer Thu Feb  4 10:12:15 1993
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Date: Thu, 4 Feb 93 10:12:10 MST
From: spencer (John R. Spencer)
To: spencer@sunkng
Subject: Io Volcano News
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                                                  February 4 1993.

Last night, 1993/02/04 UT, Beth Clark, Bill Golisch, and I obtained
1.6-4.8 micron images of Io in Jupiter eclipse and during Jupiter
occultation ingress and egress, using the NASA Infrared Telescope
Facility and the InSb camera "ProtoCAM".  Best angular resolution of
the images was about 0.35 arcsec.  The appearance and brightness of Io
showed no obvious change from 1993/01/12 and 1993/01/19, when we
obtained similar observations, some of which were reported in the last
Io volcano news bulletin.  Loki dominates the 4.8 micron volcanic
flux, but other smaller but warmer hot spots to the south and west of
it become significant at shorter wavelengths.  Loki is somewhat
brighter than in the winter of 1992 but much fainter than during the major
brightening in the winter of 1991.

John Spencer
Lowell Observatory