Observation of 103P Hartley 2010-08-20

After near 2 hours of exposition (56 x 120" shots) i took this image of 103P-Hartley.



You can see 2 weak but real wave/arclet structures.
Will be very nice to confirm this. I don't see any other image with this kind of feature on the 103P. If you know other images showing this, or if you image the comet and see this features, please, leave me a email or message. :)