The flare was expected over
Madrid during the pass of the satellites (NOSS 3-4 (A) - NOSS 3-4 (C)) on the 17th of February 2009
(18.40 UTC). See prediction.
Sirius is easily visible in the
centre area of the video, while Procyon in the upper left corner. The
maximum magnitude of the flare is of about -1. (Click on
the picture to start the video)
The flare of the satellite NOSS
3-4 (C) was longer than the flare of
the companion, as visible from the following picture, which reports the
flare track. The overall duration is of about 45 seconds. A longer
flare should occur if the observer is closer to the location where the
flare reverses its direction. (click here
to see the flare ground track over Madrid).
Many thanks to Francisco and Rafael for the observation. The
results will be useful to adjust the model.