Asymmetries Toward Higher Ecliptic Longitudes than
the Nominal Upstream Direction in Twelve Heliospheric Data Sets.

Michael. R. Collier

I will present twelve heliospheric data sets from eleven
different spacecraft which all show evidence for a
heliospheric asymmetry.  Furthermore, all these data sets
show the asymmetry in the same direction, towards higher
ecliptic longitudes than the nominal symmetry axis at 74
degrees/254 degrees ecliptic longitude, and about the same
magnitude, generally between 10 and 30 degrees.  One possible
explanation is the presence of a secondary stream of
heliospheric neutral fluxes arriving from this direction with
a density somewhere around 10^-3-10^-2 per centimeter cubed.