Key statistics
Satellite NNSS 20 (TRANSIT 20) at a glance.
Uptime
18938
Days in orbit
Revolutions
≈ 13.7
Per day
Orbit
LEO
Low Earth Orbit
Inclination
89.8
Latest
Satellite identification and parameters
Extended collection of information and parameters for NNSS 20 (TRANSIT 20).
Object identification
Identified? True
Debris? False
Object name: NNSS 20 (TRANSIT 20)
International designator: 1973-081A
Object number (NORAD): 6909
Object ID (CCSDS): 6909
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 105.004 minutes
Inclination: 89.844 deg
SMA: 7372.76 km
Apoapsis: 1109.231 km
Periapsis: 880.019 km
RAAN: 256.6131 deg
Eccentricy: 0.01554454
Argument of periapsis: 17.8798 deg
Mean anomaly: 342.7748 deg
Mean motion: 13.71379382 rev/day
Mean motion (dot): 0.00000327 rev/day2
B* drag term: 0.00032392603 1/REarth
Two-line elements (TLE)
Creation date: Sept. 4, 2025, 10:13 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 4, 2025, 2:13 a.m. UTC
TLE line 0: 0 NNSS 20 (TRANSIT 20)
TLE line 1: 1 06909U 73081A 25247.09276636 .00000327 00000-0 32393-3 0 9997
TLE line 2: 2 06909 89.8440 256.6131 0155445 17.8798 342.7748 13.71379382789954
Live tracking on map
Real-time ground track for satellite NNSS 20 (TRANSIT 20).
In-orbit conjunctions
There are no conjunctions computed for NNSS 20 (TRANSIT 20), at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
The Transit-O series of satellites that closely followed the design of Transit 5C-1 were also called “Oscars” (Oscar is the phonetic alphabet for “O”, i. e., operational). They were also called NNS (Navy Navigation Satellite) or shortened NavSat.
NNSS 20 (TRANSIT 20) was lifted into orbit during the mission ‘Scout A-1 | Transit-O 20’, on board a Scout A-1 space rocket.
The launch took place on Oct. 30, 1973, 12:37 a.m. from Space Launch Complex 5.
For more information about the launch, click the button.
Scout A-1 | Transit-O 20
Agency: N/A
Status: Launch Successful
Launch date: Oct. 30, 1973, 12:37 a.m. UTC
Rocket: Scout A-1
Launch pad: Space Launch Complex 5
Location: Vandenberg SFB, CA, USA
...
Latest news about this satellite
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