martes, 26 de marzo de 2013
SYNCHRONE ANALYSIS AND SYNDYNE OF COMET C/2011 L4 PANSTARRS
Preliminar's analysis of the original image of Michael Jaeger ( Austria ) , and processed by J.P.Navarro Pina ( Spain ), by software astroart 5.0 , were applied to analyse the morphology of comet PANSTARR'S dust tail and the evolution of its streamers : 1- direct modelling of the brightness distribution in the tail 2- determination of streamers densities 3- synchrone analysis 4- syndyne analysis The time variable variable particle production rate is given by : N (t , B ) = N0 * B(p) * r (q,c ) * t N0 is an arbitrary scaling factor related to the total dust production q and p , free parameters . B = F rad / F grav denotes the ratio of the solar radiation pressure force vector , F rad , and the vector of the force gravitation F grav .B is dependent only on the bulk properties of the dust grains and can be related to a representative particle radius .
C/2019 Y4 ATLAS by HUBBLE SPACE TELESCOPE Original observing program: 16111 - Jewitt, David - University of California - Los Angeles Breakup...
Discovery Date December 28, 2019 Magnitude 19.6 mag Discoverer Asteroid Terrestrial-Impact Last Alert System (ATLAS) search program