w. the proceeds from sale of his late father's small brewery, Krieger built a private observatory w. a 12.5 inch refractor, later moved to Trieste
He had been inspired by the director of the Cologne Observatory to make the study and observation of the Moon his life's work
Germany
lunar map of 3.5 m diameter (never fully finished) ; Mond-Atlas, entworfen nach den Beobachtungen an der PIA-Sternwarte in Tiest (with 28 plates prepared 1898, published posthumously in Vienna, 1912, reprint 2012) ;
member of the Astronomical Society of Triest (Astronomischen Gesellschaft Triest) ;
his remaining drawings and sketches were published at the suggestion of Krieger's friend Professor Seeliger, in a 2nd set compiled & edited by the Austrian selenographer Rudolf König ;
collage of combination of lunar photographs (from Lick Obs., USA) & his own astronomical charcoal, graphite pencil & ink drawing ;
J. N. K.'s Mond-Atlas nachts an der Pia-Sternwarte in Triest angestellten Beobachtungen unter Zugrundelegung der hinterlassenen Zeichnungen und Skizzen bearbeitete und mit Unterstützung der Kaiserl. Akademie der Wissenschaften in Wien aus den Mitteln der Treitl-Stiftung ;
Amateur astronomer, draughtsman & selenographer in Bavaria / Bayern; for a modern reprint cf. http://www.astro-foren.de/showthread.php?11929-Der-Mond-Atlas-von-Johann-Nepomuk-Krieger.
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