File:Hubble comet c 2014 un271.png

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DescriptionHubble comet c 2014 un271.png	English: 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 about 2 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.
Date	8 January 2022
Source	https://www.nasa.gov/feature/goddard/2022/hubble-confirms-largest-comet-nucleus-ever-seen
Author	NASA, ESA, Man-To Hui (Macau University of Science and Technology), David Jewitt (UCLA); Image processing: Alyssa Pagan (STScI)

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Author	Space Telescope Science Institute Office of Public Outreach
Image title	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.
Copyright holder	Public
Short title	Comet C/2014 UN271 Nucleus
Credit/Provider	NASA, ESA, Man-To Hui (Macau University), David Jewitt (UCLA)
Headline	Comet C/2014 UN271 Nucleus Is Isolated From Surrounding Coma
Source	STScI
Usage terms	http://hubblesite.org/copyright/
Date and time of data generation	00:00, 29 March 2022
Color space	sRGB
Exif version	2.31
Image width	1,080 px
Image height	360 px
Bits per component	16 16 16
Height	360 px
Width	1,080 px
Pixel composition	RGB
Number of components	3
Horizontal resolution	25.4 dpi
Vertical resolution	25.4 dpi
Contact information	outreach@stsci.edu http://hubblesite.org 3700 San Martin Drive Baltimore, MD, 21218 USA 410-338-4444
Keywords	Comet C/2014 UN271
Date and time of digitizing	03:27, 8 March 2022
Software used	Adobe Photoshop 23.2 (Macintosh)
Date metadata was last modified	10:28, 29 March 2022
File change date and time	09:54, 29 March 2022
Unique ID of original document	xmp.did:f43422ed-b925-41a0-abef-e6038e92bcad
Copyright status	Copyright status not set

File:Hubble comet c 2014 un271.png

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C/2014 UN₂₇₁ (Bernardinelli-Bernstein)

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8 January 2022

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File:Hubble comet c 2014 un271.png

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