The supernova remnant ( SNR ) , Ho 12 , in the center of the dwarf irregular galaxy NGC 6822 was previously observed at X-ray , optical , and radio wavelengths .
By using archival Chandra and ground-based optical data , we found that the SNR is spatially resolved in X-rays and optical .
In addition , we obtained a \sim 5 \arcsec resolution radio image of the SNR .
These observations provide the highest spatial resolution imaging of an X-ray/optical/radio SNR in that galaxy to date .
The multi-wavelength morphology , X-ray spectrum and variability , and narrow-band optical imagings are consistent with a SNR .
The SNR is a shell-shaped object with a diameter of about 10 ^ { \prime \prime } ( 24 pc ) .
The morphology of the SNR is consistent across the wavelengths while the Chandra spectrum can be well fitted with a nonequilibrium ionization model with an electron temperature of 2.8 keV and a 0.3–7 keV luminosity of 1.6 \times 10 ^ { 37 } \hbox { ergs } \thinspace \hbox { s } ^ { -1 } .
The age of the SNR is estimated to be 1700 - 5800 years .