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USA
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21218
MD
outreach@stsci.edu
410-338-4444
http://hubblesite.org
Hubble
2022-020a
Good
WFC3/UVIS
2022-03-29
1.2
16886
https://archive.stsci.edu/proposal_search.php?mission=hst&id=16886
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-56.30690278
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Space Telescope Science Institute Office of Public Outreach
This sequence shows how the nucleus of Comet C/2014 UN271 (Bernardinelli-Bernstein) was isolated from a vast shell of dust and gas surrounding the solid icy nucleus. On the left is a photo of the comet taken by the NASA Hubble Space Telescope’s Wide Field Camera 3 on January 8, 2022. A model of the coma (middle panel) was obtained by means of fitting the surface brightness profile assembled from the observed image on the left. This allowed for the coma to be subtracted, unveiling the point-like glow from the nucleus. Combined with radio telescope data, astronomers arrived at a precise measurement of the nucleus size. That’s no small feat from something 3 billion miles away. Though the nucleus is estimated to be as large as 85 miles across, it is so far away it cannot be resolved by Hubble. Its size is derived from its reflectivity as measured by Hubble. The nucleus is estimated to be as black as charcoal. The nucleus area is gleaned from radio observations.
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Public
Comet C/2014 UN271
Comet C/2014 UN271 Nucleus
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NASA, ESA, Man-To Hui (Macau University), David Jewitt (UCLA)
2022-03-29T00:00
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