Tracking 17332 objects as of 26-November-2015
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COSMOS 721 is no longer on orbit
COSMOS 721 is classified as:

NORAD ID: 7705
Int'l Code: 1975-020A
Launch date: March 26, 1975
Source: Commonwealth of Independent States (former USSR) (CIS)
Decay date: 1975-04-07
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NASA's NSSDC Master Catalog

Two Line Element Set (TLE):

Source of the keplerian elements: AFSPC

N2YO: 260