Beside the famous NGC/IC Planetary Nebula we all know the Minkowski’s and the Kohoutek’s, of course also the Abell’s. But next to them the knowledge of the numerous catalogues drops. This is of course the difficult observation which concerns the faint brightness or often the very small angular size <5” which let the PN looks like a star.
Today we meet one of the very rare exceptions – “Peimbert-Costero 22”.
But WTF is PB 22? “P” stands for the person Manuel Peimbert, “C” for Rafael Costero – both Mexican astronomers who worked at the Tonantzintla Observatory (Bill Keel's presentation) near Puebla, Mexico. They published a list (the second list of them) of 14 new discovered PN (Nuevas Nebulosas Planetarias II) which were found trough objective prism plates with the 28-inch Schmid camera.
Number 22 is the goal this week. With 20" it belongs to the bigger PN. I noted "nonstellar from 100x up". With the brightness it could be a goal already for the 8" class. With higher magnification the rectangular for is obvious and good good seeing brings out some detail within the brighter rim. I could not detect any CS, one source says 18.1mag.
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