Not much traffic these days so let me ask a somewhat
off-topic question please.

Last night on one follow-up field I had a satellite crossing
the field, but the trail it left looks somewhat unusual to me.

I've seen thousands of them before but never something
like this. The trail seems to consist of two trails which are
wound around each other.

What is it? I don't think a satellite would be resolved on our
imaging system, even if flying *very* low. But what was it then?

It fully crossed the field during one exposure. I can therefore
not tell in which of both directions it moved, nor can I tell the
speed. As it crossed the entire field during the 90s exposure time
it must have moved faster than 22arcmin/90s.

I have uploaded some screenshots here:
http://www.minorplanets.org/OLS/misc/

These are just a part of the full frame. The lower screenshot
is a zoomed version of the center part of the upper one.
The coordinates of the center are appr. 21 03 59 +12 02 57.

DATE-OBS= '2009-07-14T03:31:35' /YYYY-MM-DDThh:mm:ss observation start, UT
EXPTIME = 90.000000000000000 /Exposure time in seconds

Reiner
J75 LSSS