*The Carlos Jaschek Award was created in his honor in 2006 by the Société Européenne pour l Astronomie dans la culture' (European Society for Astronomy in Culture).
* The minor planet (2964) Jaschek was named after him. It was discovered July 16, 1974, at the Carlos U. Cesco Observatory at El Leoncito.
*Received the 1955 John Simon Guggenheim Memorial Foundation fellowship. [https://www.gf.org/fellows/all-fellows/carlos-oton-rudiger-jaschek/ "Carlos Oton Rüdiger Jaschek".] Astronomy and Astrophysics; Latin America & Caribbean competition.
*Member of the National Center for Scientific Research in France 
*Member of the National Academy of Sciences of Argentina.
*Member of the Royal Argentine Astronomical Society
*Member of the Astronomische Gesellschaft, the German Astronomical Society.
*Member of  the International Astronomical Union (IAU) Organizing Committee of Commission 33 Structure & Dynamics of the Galactic System from 1964 to 1967. Member of the Organizing Committee of Commission 45 Stellar Classification from 1967 to 1970, Jaschek became Vice-President from 1970 to 1973, was President from 1973 to 1976, and was on the Organizing Committee from 1976 to 1979. He was on the Organizing Committee of Commission 29 Stellar Spectra from 1973 to 1985, and on the Organizing Committee of Commission 5 Documentation and Astronomical Data from 1982 to 1991.