Full Nucleus Rotation of Comet Hale-Bopp
Full nucleus rotation !
Comet Hale-Bopp has now become bright enough to be observable during
day-time! The good quality of the sky above Pic du Midi Observatory
allowed us to follow the comet during an entire rotation of the
nucleus, i.e. about 11.4 hours (see IAU Circ. 6560). This animation was
made with CCD images obtained on February 28th between 3H50m and 15H35m UT
with a Gunn-z (broad-band, near infra-red) filter. Several images
(until 50 images) were centered and co-added in order to create the
individual frames presented in this animation. There is about one frame
every 10 minutes. We obtained a total of 1100 images during the whole
The first and the last image are quite the same, the only difference is
the different signal/noise ratios. In fact the animation "in loop"
allows to see the perpetual evolution of the jet.
Pic du Midi Animation (Animated GIF, 285K)
Scientific team : Laurent Jorda, Jean Lecacheux, François Colas and Pierre
All the images were taken with the 105 cm telescope at Pic du Midi
Observatory (Station de Planetologie des Pyrenees)
Comments can be sent to Francois Colas
Comet Hale-Bopp Home Page