NED object is MESSIER 033; Reference is 1987A&AS...68..171B

   FIGURE 3.-Distribution of the total intensity at 17.4 cm in the field of M33
 shown as contours in equal steps of 20 mJy per b.a. (2.3 {sigma}). Contour
 lines with an arrow pointing clockwise indicate decreasing intensities,
 whereas those pointing anticlockwise indicate increasing intensities.
 Positions of 18 point sources with flux densities exceeding 4 {sigma} are
 marked. The coordinate grid is the same in all maps and refers to right
 ascension and declination of 1950.0. The optical centre at {alpha}_50_ =
 1h31m01.67s and {delta}_50_ = 30deg24'15.0" (de Vaucouleurs and Leach, 1981)
 is marked by << + >> in all figures.