Launch Date
August 2, 1991
Launch Site
Launch Pad
LC39A
Launch Vehicle
Space Shuttle
NORAD ID
21639
International Designator
1991-054B
Epoch
Sat, 04 Jul 2026 04:32:05 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
14.07°
Right Ascension
353.65°
Eccentricity
Calculating...
Argument of Perigee
257.62°
Period
1436.12 min
Mean Motion
1.00 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Name
TDRS 5
Alternative Name
TDRS 5
Type
Status
Owner
GSFC
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
1 21639U 91054B 26185.18895676 .00000091 00000-0 00000-0 0 9992
2 21639 14.0688 353.6484 0006738 257.6174 291.2990 1.00270012127880
Source: Celestrak
Length
1.3
Diameter
2.4
Span
17.4
Dry Mass
1700
Launch Mass
2534
Shape
Box + Dish + 2 Pan
Radar Cross Section
20.8608
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Payload
TDRS-E
Purpose
Communication, data relay
Mission
Communication, data relay
Manufacturer
TRW
Life Expectancy
10 years (design)
Bus
TDRS
Configuration
Unknown
Motor
AOCS
Equipment
4 (+2) 25W Ku-band TWTAs for LP (linearly polarized) zone coverage 2 (+2) 1.5W Ku-band TWTAs for CP (circularly polarized) spot coverage 2 (+4) 25W Ku-band TWTAs for LP zone coverage 2 (+2) 1.5W Ku-band TWTAs for CP spot coverage 12 5W TWTAs for LP C-Band up/down 2 (+2) 26W S-band SSPAs (used for intersatellite links) 8 (+4) 3.5W S-band SSPAs (used for intersatellite links)
Power System
2 deployable solar arrays, batteries
ADCS
Unknown
Transmitter Frequency
Unknown
Learn more about satellites and other related topics.
SpaceX successfully launches GPS satellite for Space Force — third consecutive GPS mission switched from ULA. EBAD demonstrates payload release module on Falcon 9 rideshare mission.
SpaceX launches Twilight rideshare from Vandenberg carrying ~40 payloads including NASA's Pandora satellite. Kepler debuts 10 optical data relay satellites. OroraTech thermal sensors integrated.
Today's briefing covers strategic military developments including missile defense proposals and board realignments, intertwined with rising space defense exports and autonomous launcher progress.
Uncover the top companies dominating the satellite industry. From SpaceX to One Web, learn who's leading in space assets. Full list inside.
Key updates include the impending Falcon 9 launch for Transporter-14, insights on Starship's explosion, and a last-minute abort of the Starlink 10-23 mission.
Hypersonica completes Mach 6+ hypersonic missile flight test in Norway covering 300+ km. Pentagon seeks commercial GEO spy satellites. Gilat wins $9M Israeli defense satcom deal.
Elon Musk controls 79% of SpaceX's votes with just 42% of the equity - and the company just merged with his AI startup at a $1.25 trillion valuation. Here's who actually owns what, how the money works, and what a $1.75 trillion IPO means for investors.
Key space events for today include potential changes in US space policy involving SpaceX, uncertainties regarding NASA's Starliner, and China's new steps in asteroid exploration.
