Kosmos 123 separated from the carrier rocket into a low Earth orbit with a perigee of 256 kilometres (159 mi), an apogee of 512 kilometres (318 mi), an inclination of 48.8°, and an orbital period of 92.2 minutes.[2] It decayed from orbit on 10 December 1966.[7] Kosmos 123 was the sixth of seventy-nine DS-P1-Yu satellites to be launched,[4] and the fifth of seventy-two to successfully reach orbit.
^ ab"Cosmos 123: Display 1966-061A". nssdc.gsfc.nasa.gov. NASA. 27 February 2020. Retrieved 31 March 2020. This article incorporates text from this source, which is in the public domain.
Launches are separated by dots ( • ), payloads by commas ( , ), multiple names for the same satellite by slashes ( / ). Crewed flights are underlined. Launch failures are marked with the † sign. Payloads deployed from other spacecraft are (enclosed in parentheses).
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