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Analysis C/2020 F8 SWAN

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In my differential analysis, the comet shows 3 different brightness laws with 3 changes in photometric parameters: 1 law R = 0.87 au 2 law R = 0.77 au 3 law R = 0.67 au the equal difference in the variation of the heliocentric distance of the comet from d (r) ~ 0.10 au, with an increase in brightness and later a decrease in brightness, there is an outburts in DJ = + 2450000 + 8965, of approximately 2 magnitudes: d (m1) / d (r) = 2.0 / 0.10 = 20 mag / au My hypothesis is that the comet has undergone a sudden and brief increase in brightness due to an unusual increase in the comet's dust and gas production rates that has lasted approximately less than a week, the brightness production rate should stagnate and continue even steady rhythm without going down.

Evolution of the fragmentation of the comet ATLAS from April 20 to 23, 2020 based HST images .

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Original observing program: 16111 - Jewitt, David - University of California - Los Angeles Breakup of Long-Period Comet C / 2019 Y4 (ATLAS) Images HST Evolution of the fragmentation of the comet ATLAS from April 20 to 23, 2020, in the images of April 20, 2020, 4 bright fragments called ABCD are observed, after 72 hours the comet only shows 2 main AYB fragments, and several mini fragments Comments, I am in the process of analyzing the images, I hope to present my results soon, in this blog.

C/2019 Y4 ATLAS HST

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C/2019 Y4 ATLAS by HUBBLE SPACE TELESCOPE Original observing program: 16111 - Jewitt, David - University of California - Los Angeles Breakup of Long-Period Comet C/2019 Y4 (ATLAS) Processing J.P.Navarro

Outburst Comet C/209 Y1 ATLAS

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CBET 4751 IAU Comet C/2019 Y4 ATLAS : Navarro Pina mentioned by Z. Sekanina JPL /NASA

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Light visual curve comet C/2019 Y4 ATLAS ( News )

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My last analysis of the visual light curve of the comet C / 2019 Y4 ATLAS, confirms the prediction I made a few days ago in the group, about the change in the evolution of the comet's brightness, in the heliocentric range 1.6 < r < 1.4 au, in my Cometary Astrophysics blog, you can see the change in the rate of increase in brightness, which occurs at the distance R = 1.67, on March 21, 2020, as I predicted a few days ago , the graph based only on visual observations, you can see the green line that shows an activity index or rate of increase in brightness of n = 40.0 a law of brightness (R ^ -16), however there is a change in R = 1.67 au, as I first predicted in this group, a few days ago, occurred on the date of March 21, 2020, confirming my forecasts, that it is a possible fragment or twin comet to comet C / 1844 Y1, since that the orbital elements have a fairly exact match, my bet, is that the eater ta C / 2019 Y4 ATLAS, it is a brother or twin comet, from the date of Mar…

Light Visual CCD Curve Analysis of the comet C/2019 Y4 ATLAS

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Discovery Date December 28, 2019 Magnitude 19.6 mag Discoverer Asteroid Terrestrial-Impact Last Alert System (ATLAS) search program