sábado, 31 de enero de 2015
domingo, 11 de enero de 2015
Hi , recent update the light visual and ccd curve of comet C/2014 Q2 LOVEJOY , the comet continue the increase of brightness , my last anaysis indicate variation of activity index of d(n)= -0.5 , the rate of increment continue high for this comet , n=9.7 , the power law is R^-9 , the normal power law is R^-4 , the formula general analyzed by Navarro Pina is m1= 2.9 + 5 log (delta) + 24.4 log (R) , the ICQ / MPC formula is m1= 4.0 + 5 log (delta) + 21.0 log (R) , the light curve is based in 828 from MPC/IAU , Comet Obs , Comet base , COBS , LIADA and observadorescometas original sources . * Preliminar results of comet C/2014 Q2 LOVEJOY * Calculated Mass , Diameter , Water rate production , and Fraction of active surface Area ( FASA ) Based in the work of Masses of long period comets ( A. Sosa , J.Fdez. 2011 ) , Analysis by J.P.Navarro Pina. * Water rate production log10 Q ( H2O ) = 10^-29.38 mol s-1 > 3.500 kgs /sec ( 3.5 tons / sec. ) Diameter ( km) * log10 D ( kms ) = 1.123 * log 10 M ( kgs ) = 13.96 For comparison : C/2004 Q2 .... log10 M ( kg ) = 13.0 C/2002 V1 NEAT .....log10 M ( kg) = 12.8 * Fraction of Active Surface Area = 3.1 For comparison : C/2004 Q2 , C/2007 W1 ..... FASA = 2.5 ** Note : These results are based on theoretical models and should be taken with caution .
Comet C / 2021 A1 Leonard shows at the moment with 272 ccd observations a linear fit in its light curve, the provisional photometric parame...