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Asteroid (130) Elektra belongs to one of the six known triple asteroids inthe main belt, so its mass has been reliably determined. We aim to use allavailable disk-resolved images of (130) Elektra obtained by the SPHEREinstrument at VLT and by the Nirc2 of the Keck telescope together with thedisk-integrated photometry to determine its shape model and its size. Thevolume can be then used in combination with the known mass to derive the bulkdensity of the primary. We apply the All-Data Asteroid Modeling (ADAM)algorithm to the optical disk-integrated data, 2 disk-resolved images obtainedby the SPHERE instrument and 13 disk-resolved images from the Nirc2 of the Kecktelescope, and derive the shape model and size of Elektra. We present the shapemodel, volume-equivalent diameter (199$\pm$7 km) and bulk density(1.60$\pm$0.13 g cm$^{-3}$) of the C-type asteroid Elektra.

Shape model of asteroid (130) Elektra from optical photometry and disk-resolved images from VLT/SPHERE and Nirc2/Keck