Context : Double-lobe radio galaxies are ideally suited to investigate the interaction of the individual components of the radio structure with the intergalactic medium and the interstellar medium of the host galaxy .
SDSS J080800.99+483807.7 has been serendipitously discovered in MERLIN 18 cm observations to be a double-lobed radio galaxy .
Because it is an optically faint source , basic information like redshift , linear size , and structure has been incomplete until now .
Furthermore , there are no spectra of this source available in any databases .

Aims : The goal of this work is to derive the main physical properties of SDSS J080800.99+483807.7 and study the possible interaction between the radio jets and the interstellar medium of the host galaxy .

Methods : To achieve this goal , we used optical spectroscopy and radio interferometry .
The radio data were obtained with MERLIN at 18 cm and the optical data with the Multi-Object Double Spectrograph ( MODS ) at the Large Binocular Telescope ( LBT ) .

Results : The redshift of the galaxy is z = 0.2805 \pm 0.0003 , resulting in a linear size of the observed radio structure of \sim 26.3 \mathrm { kpc } .
The optical line emission as well as the infrared and radio continuum emission suggest a high star-formation activity .
In addition , we estimated the mass of the central black hole to be \log \left ( M _ { BH } / M _ { \sun } \right ) \approx 6.9 .

Conclusions : The MODS spectrum and the optical images from Sloan Digital Sky Survey suggest that SDSS J080800.99+483807.7 is an elliptical host galaxy .
In combination with the overall radio structure , we argue that the star formation could be the result of the back-flow along the jet and the interstellar medium of the host .