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Baltimore
USA
3700 San Martin Drive
21218
MD
outreach@stsci.edu
410-338-4444
https://www.stsci.edu/
Distance in au
2.0897
Webb
2023-123b
Good
NIRCam
2023-05-11
1.2
1252
https://www.stsci.edu/cgi-bin/get-proposal-info?id=1252&observatory=JWST
STScI
stsci
https://webbtelescope.org/contents/news-releases/2023/news-2023-123
STSCI-J-p23123b-f-972x855.png
https://stsci-opo.org/STScI-01H05V7T4BZQ267RG99ZACNRTF.png
ICRS
TAN
2000.0
Position
67.04671667
21.54858333
Infrared
2000
Blue
Observation
Space Telescope Science Institute Office of Public Outreach
This image of Comet 238P/Read was captured by the NIRCam (Near-Infrared Camera) instrument on NASA’s James Webb Space Telescope on September 8, 2022. It displays the hazy halo, called the coma, and tail that are characteristic of comets, as opposed to asteroids. The dusty coma and tail result from the vaporization of ices as the Sun warms the main body of the comet.
Comet Read was among three objects used to define the category of main belt comets in 2006. Before that, comets were understood to reside in the Kuiper Belt and Oort Cloud, beyond the orbit of Neptune, where their ices were preserved farther from the Sun. Since that time scientists have sought to confirm the presence of sublimating material in main belt comets, proving that their coma and tail were due to the same processes that other comets exhibit. With the detection of water vapor on Comet Read, Webb’s sensitive NIRSpec (Near-Infrared Spectrograph) instrument has achieved this goal.
image/png
Public
Comet 238P/Read
P/2005 U1
Comet 238P/Read (NIRCam Image)
hs-2004-07-a-full-tif.tif
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NASA, ESA, CSA, STScI, M. Kelley (UMD), and H. Hsieh (PSI)
2023-05-15T10:00
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