  Using Spitzer photometry at 4.5 microns, we search for rings and satellites
around the long period transiting planet CoRoT-9b. We observed two transits in
2010 and 2011. From their non-detection, we derive upper limits on the
plausible physical characteristics of these objects in the planet environment.
We show that a satellite larger than about 2.5 Earth radii is excluded at
3-$\sigma$ for a wide range of elongations at the two epochs of observations.
Combining the two observations, we conclude that rings are excluded for a wide
variety of sizes and inclination. We find that for a ring extending up to the
Roche limit, its inclination angle from the edge-on configuration as seen from
the Earth must be lower than 13{\deg} in the case of silicate composition and
lower than 3{\deg} in the case of material with water ice density.
