& comet Machholz 2004 Q2 

pd2005.01.24.9127 & perihelion passage date (yy.mm.dd.fractions-of-day)
an93.6239     & ascension node
pn19.5064     % perihelion from node
i38.5894       & inclination
q1.205035      # distance from Sun in perihelion
e0.999473      # numerical excentricity
s1              # step for next (or preceding) positions : two days
ce              # cometary exponent (default one:4) 
fa500          # absolute faintness 5 mag