S4G Mid-Infrared Type: (R)SA(r)ab

Filter: 3.6 microns

Telescope: Spitzer Space Telescope
North up, East left
Field Dimensions: 5.3 x 3.8 arcminutes
Surface Brightness Range Displayed: 14.5-28.0 mag per square arcsec

Notes:
worth Fourier-analyzing for counter-winding spiral structure