viernes, 16 de julio de 2010
Updating the light visual curve pre-perihelion of comet C/2009 R1 McNaught based in 121 visuals magnitudes from International Comet Quaterly , international observers of comets lists of yahoogroups.com CometObs , and spanish lists observadorescometas , the preliminar analysis of author show the discovery of 2 outburts , T ~ 30 days before from perihelion d(m1) = +0.8 magnitudes , and
d(m2) = +0.6 magnitudes , the comet show 'brakes' ~ 18 days from perihelion and the maximum magnitude +5.0 . The comet have 3 three laws photometricals , the next power's law n1 = 8.3 , n2 = 10.1 , and n3 = 1.0 .
martes, 25 de mayo de 2010
The next work and graphics this is based in 61 magnitudes visuals from the International Comet Quaterly and spanish list observadorescometas from yahoogrouops.com , J.P.Navarro Pina , author have analyzed and calculate the parameters photometricals of the comet C/2009 K5 McNaught , resumen two graphics , the first show the magnitudes visuals axis y , and axis x days from perihelio , and the second show magnitude reduced ( m1 = mv - 5log delta ) and distance heliocentric , the comet is high brightness from post-perihelio before pre-perihelio , probably the post-perihelio show different hemisphere nucleus .
lunes, 12 de abril de 2010
Analysis by isophotes of coma of comet C/2007 W1 , this image this based in preliminar image processed CCD from "Observatorio Astronomico Vega del Thader"
El Palmar , Murcia , Spain , your author is J.P.Navarro Pina , the image calculate the velocity expansion of coma based in distances of lines of contours , and calculate column density grains of dust in the coma of the comet C/2007 W1 , the next publication of results for this work .
domingo, 14 de marzo de 2010
* Work of reference " correlation between visual magnitudes and outgassing rate of CO in comets beyond 3 AU" ,Author : N.Biver , 1.999) The next law properly conforms to the equation of the graph and only for the comet 29p , for anothers comets this next equation is correct log Q (CO) = 30.0-0.29*mred .* The speed of ejection of CO gas escaping the nucleus is 450-500 m s-1 ( e.g. Gunnarsson et al. 2002 ) ,Carbon monoxide gas has been detected in the coma of SW-1 and is thought to be the primary driver gas ( Senay & Jewitt 1994 , Festou et al. 2001 ) , Gunnarsson et al. 2002 ) . The nucleus of SW-1 has been estimated to be 15-40 km in diameter ( e.g. based on analysis of its 20 um thermal emission and photometry visible .
Comet C / 2021 A1 Leonard shows at the moment with 272 ccd observations a linear fit in its light curve, the provisional photometric parame...