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Comet C2011 J2 (Linear), was discovered to the Catalina Sky SurveyObservatory, based on University of Arizona. Is an hyperbolic comet passed tothe perihelion at T 2013 Dec. 25.4020 TT. The distance q from the Sun is3.443732 A.U., that mean that dont never cross the snow line. Also, the Sungravitational force is not such to determine a strong stress on the cometarynucleus. A possible fragmentation at that distance from the Sun in general, isunlikely, but on 2014 September 19th, the CBAT 3979 by D. Green of the ICQ,report the discoveries of a fragment companion of the comet main body. In thefollowing days others observers confirms the presence of the secondary body.(F. Manzini et al. September 2014, IAU CBET 3986, 2014 September 24th) In theobservation of the comet on 2014 September 28, using a 25 cm Newton and CCDwith R photometric filter, I detect the secondary body and assuming as possiblescenario the presence of a solid fragment in the cloud of material of thefragmentation, I measured some physical parameters, the magnitude in R band andAf(rho) value of the two nuclei. Here are presented the preliminaries data.

Comet C/2011 J2 (Linear): Fragmentation and physical properties of the two nuclei