Campbell's Hydrogen Star HD 184738 BD+30 3639 planetary nebula PK 64+5.1

Campbell’s Hydrogen Star (BD+30 3639 HD 184738), the star center of the Planetary Nebula PK 64+5.1, is a very unusual Wolf-Rayet star in the constellation of Cygnus. The PN has a size of only 6 arcsec, taken with lucky imaging method approx. 1.200x 500 ms. with ASI533 and Takahashi Mewlon-210 f9.3 (with corrector)