Wed Jul 20 00:40:16 1994
We observed the southern H3+ aurora at UT 1:30 July 18
in order to measure any difference in H3+
temperature after several impacts.
At that time B and D impact sites were visible,
and it was ~1 hour after the F impact.
We used the IRS on the CTIO 1.5 m telescope
with a spectral resolving power of 1600.
The covered spectral range is 2700 - 3000 cm-1.
We found a rotational temperature of
1000 +/- 100 K, which is very close normal auroral
H3+ temperatures measured last several years.
This result suggests that the SL9 impacts might not make
significant influence on the auroral activity.
Sang Kim, Christophe Dumas, Jay Elias, Richard Elston.