[meteorite-list] A Temperature Map of Comet Tempel 1

From: Ron Baalke <baalke_at_meteoritecentral.com>
Date: Fri Oct 21 12:49:15 2005
Message-ID: <200510211616.j9LGGG504060_at_zagami.jpl.nasa.gov>

http://deepimpact.jpl.nasa.gov/gallery/Temperature_Map.html

A Temperature Map of Tempel 1
Deep Impact Project

[Temperature Map Image]

A temperature map of the nucleus with different spatial resolutions. The
context image (in black and white) is a HRIVIS image taken just before
impact. The color bar in the middle gives temperature in Kelvins. The
sun is to the right in all images.

These data were acquired with the IR spectrometer using signal between
1.8 and 2.2 ?m and modeled to contain both a reflected and an emitted
component. After this model is applied, the resulting number is a
temperature which is represented by different colors with red being the
highest and purple the coldest.

The derived temperature varies from 260 +/- 6 K to 329 +/- 8K. Shadows
are the coolest temperatures, and the point directly below the sun is
hottest. These temperatures indicate that the thermal inertia of the
surface (the quality of the surface describing the ability to conduct
and store heat) is low. In other words, on Tempel 1, it is hot in the
sun and cold in the shadows. A value for thermal inertia is estimated at
<100 W/K/m2/s1/2.

Photo Credit: NASA/JPL/UMD
and from ScienceExpress
Received on Fri 21 Oct 2005 12:16:15 PM PDT