Hi Jari, Kevin,

After commenting that maybe I should add the ability to shut
off interplanetary probes, it occurred to me that a better way
would be to add a function similar to the "asteroid filtering"
described at

http://www.projectpluto.com/update7.htm#asteroid_filtering

to filter satellites in addition to interplanetary probes.
This would have other uses. For example, if the filter were

alt < 1000

you could show all objects lower than a thousand kilometers.
Something like

P<.52 & P > .48 & i > 60 & i < 70 & e > .5

(with P=period in days) would show all Molniya satellites.

P < 1.1 & P > .9 & e < .2

would filter out everything except the geosats. And, to
finally get around to what started this conversation,

alt < 400000

would leave only the earth-orbiters. Turn the '<' into a
'>', and you would have the situation you describe: only the
interplanetary probes would be shown.

All of which, again, will have to wait a bit until the
current update is stabilized!

-- Bill