n-a-s-a: Comets Lemmon and PanSTARRS Peaking Image Credit &...

n-a-s-a:

Comets Lemmon and PanSTARRS Peaking
Image Credit & Copyright: Yuri Beletsky (ESO)

Cometa PanSTARRS

Explanation:
Two impressive comets will both reach their peak brightness during the next two weeks. Taking advantage of a rare imaging opportunity, both of these comets were captured in the sky together last week over the Atacama desert in South America. Comet C/2012 F6 (Lemmon), visible on the upper left of the above image, is sporting a long tail dominated by glowing green ions. Comet C/2011 L4 (PanSTARRS), visible near the horizon on the lower right, is showing a bright tail dominated by dust reflecting sunlight. The tails of both comets point approximately toward the recently set Sun. Comet Lemmon will be just barely visible to the unaided eye before sunset in southern skies for the next week, and then best viewed with binoculars as it fades and moves slowly north. Comet PanSTARRS, however, will remain visible in southern skies for only a few more days, after which it will remain bright enough to be locatable with the unaided eye as it moves into northern skies. To find the giant melting snowball PanSTARRS, sky enthusiasts should look toward the western horizon just after sunset…

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Comets Lemmon and PanSTARRS Peaking
http://apod.nasa.gov/apod/ap130305.html 

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O cometa C/2011 L4 (PANSTARRS) é um cometa não-periódico descoberto em junho de 2011, que está visível a olho nu, próximo periélio em março de 2013.
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Map: visibility of comet Pan-STARRS in March 2013 
https://www.youtube.com/watch?v=WhXyegVTikc

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Comet PANSTARRS Close Approch 5 Mar 2013 
https://www.youtube.com/watch?v=FeeqQFiCc2s 

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PanSTARRS Setting on the Horizon
https://www.youtube.com/watch?v=VicRJnuAYIs

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