X Report 25 Jul 2025
SpaceX successfully launched NASA's TRACERS mission while Starlink faced a brief global outage, affecting users worldwide.
OPS 5721 (DMSP 5D-1 F1) (09415)
COSPAR: 1976-091A | Alt Name: DMSP F-1
Image
Additional Sources
Launch Details
Launch Date
September 11, 1976
Launch Site
AFWTR
Launch Pad
SLC10W
Launch Vehicle
Thor DSV-2U
Orbital Elements
NORAD ID
09415
International Designator
1976-091A
Epoch
Sat, 04 Jul 2026 04:02:53 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
98.36°
Right Ascension
335.43°
Eccentricity
Calculating...
Argument of Perigee
204.93°
Period
100.85 min
Mean Motion
14.28 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Polar Plot
3D Visualization
Basic Satellite Info
Name
OPS 5721 (DMSP 5D-1 F1)
Alternative Name
DMSP F-1
Type
Payload
Status
Non-operational
Owner
SAMSO
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 09415U 76091A 26185.16867995 .00000322 00000-0 14683-3 0 9997
2 09415 98.3603 335.4280 0016808 204.9254 155.1118 14.27863496354930
Source: Celestrak
Summary
Apologies, there is no summary for this satellite yet. I am working to generate these for every object in the catalog, but it is going to take time.
Physical Characteristics
Length
6.1
Diameter
1.5
Span
6.1
Dry Mass
447
Launch Mass
447
Shape
Box + Pan
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
DMSP Block 5D S-1
Purpose
Meteorology
Mission
Meteorology
Manufacturer
RCA
Life Expectancy
Unknown
Bus
Block 5D
Configuration
TIROS-N Bus
Motor
Star 37S
Equipment
see above
Power System
Deployable solar array, batteries
ADCS
Unknown
Transmitter Frequency
Unknown
Map
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration
Satellite Articles
View All Posts »Learn more about satellites and other related topics.
Space Brief 4 Nov 2025
Today's brief covers China's new GEO Yaogan satellite launch, India's record-mass commsat, military tech updates, autonomous systems for maritime security, and insights from satellite imagery of Hurricane Melissa's impact in Jamaica.
Space Brief 9 Apr 2025
Today's brief covers Blue Origin’s new defense launch contracts, the ISS launch of a Navy SEAL astronaut, Sierra Space’s GPS security advancements for the U.S. Space Force, and the Space Force's 'Orbital Watch' initiative.
X Report 27 Nov 2025
SpaceX's plans for the Transporter-15 mission are temporarily delayed as the Falcon 9 launch was scrubbed. The next launch attempt is now targeted for Friday, Nov. 28, with hopes of delivering 140 payloads into sun-synchronous orbit.
Iran Struck U.S. Aircraft Despite 'Maxed Out' Defense | KeepTrack Space Brief
Iran successfully struck U.S. aircraft in Saudi Arabia despite maxed-out defensive posture. Space Force ISR and missile warning gaps exposed. Tracking impacts.
Space Brief 4 Mar 2025
Today's brief covers the historic lunar touchdown by Firefly Aerospace's Blue Ghost lander, highlights in military space activity, and a reflection on Pearl Young's pioneering legacy at NASA.
SpaceX Stacks Super Heavy for Starship's 12th Test Flight | KeepTrack X Report
SpaceX stacks Super Heavy booster in preparation for Starship's 12th test flight. Three launches planned this week including ISRO rideshare mission. Musk shares AI and robotics predictions on podcast.
NASA Pressures Blue Origin on HLS After New Glenn Explosion | KeepTrack Space Brief
NASA demands Blue Origin find alternate launcher for Artemis moon landers after New Glenn test explosion damaged Cape Canaveral LC-36. Schedule risk to lunar missions.