lunes, 20 de mayo de 2013
I have measured and compared the gas-to-dust ratio ( GDR ) , the GDR of the comet C/2012 S1 ISON with 18 comets of half , the dust outflow velocity is assumed to be proportional to the heliocentric distance to the -0.5 power , the GDR for the 18 comets is not constant , the ISON's comet show the water outgassing rate of 1 kgs/sec based in SWIFT ( NASA ) and the 850 kgrs/sec of dust rate in r=4.9 au. , the next equation ( Weiller et al. 2003 ) log M gas / log Mdust = log Q ( OH ) / Afp , his solution to the ISON's comet is 0.0011 , for the 18 comets increasing gas production may be quantified by setting the dust production proportional to the gas production raised to the 0.55 (+-0.17) power interpret this increase as showing that outgassing is primarily throught a porous mantle , trough which gas can flow relatively easily but in which most of the dust grains are trapped for 18 comets , ISON's comet sublimate large amount of dust and the gas are trapped .
miércoles, 15 de mayo de 2013
J.P.Navarro Pina is admitted for new member of CIOC_NASA facebook group , this group (NASA_Comet ISON Observing Campaign, CIOC) provides outreach and its membership consists of comet observers, imagers, scientists, educators, etc . The administrators of NASA_CIOC : Elizabeth Warner (University of Maryland) and Padma Yanamandra-Fisher (Space Science Institute), web page : http://sungrazer.nrl.navy.mil/index.php?p=ison
viernes, 10 de mayo de 2013
The preliminar analysis of comparison of dust rate production's of comets C/1995 O1 HALE-BOPP , shows the comet C/2012 S1 ISON sublimates a factor of 6 times less than the comet C/1995 O1 HALE-BOPP to heliocentric distance r = 5.0 au , the hale-bopp's comet sublimate's , Q(dust)~ 5.000 kg/sec. in r=5.0 au , the ISON's comet based in observations of SWIFT ( NASA ) sublimate the Jan. 30 UVOT reveal that ISON was shedding about 112,000 pounds (51,000 kg) of dust every minute , or 850 kg/sec. ,in R=4.9 au , the next graphic adapted the work of the M.Weiller et al.( 2.003 ) ''The dust activity of comet C/1995 O1 HALE-BOPP between 3 au and 13 au from the sun'' shows this information .
jueves, 2 de mayo de 2013
Published new work titled : ON PHASE DEPENDENCIES OF COMETARY LIGHT CURVES , by author J.P.Navarro Pina ( Subscribed to the prestigious revist ASTRONOMY AND ASTROPHYSICS and EDPS Sciences Journal List account , and the CORNELL UNIVERSITY LIBRARY , arxiv.org ) , Published in WEB PAGE of facebook INTERNATIONAL COMET GROUP . Download here : https://www.dropbox.com/s/tasayuav1p6x1uu/ON%20PHASE%20DEPENDENCIES%20OF%20COMETARY%20LIGHT%20CURVES.pdf