AEHF 4 (USA 288), 43651
Orbit data source: Space-Track
AEHF 4 (USA 288), 43651 is a payload satellite owned by USAF MCSW (US) in GEO that was launched on Wed, 17 Oct 2018 UTC via an ATLAS V 551 launch vehicle from the Air Force Eastern Test Range (AFETR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
Focus sentinelFocus sentinel
Request partner network tasking
Focus sentinelFocus sentinel
Embed this page
Focus sentinelFocus sentinel
43651 intel report (Beta)
Focus sentinelFocus sentinel
Edit Public Description
Focus sentinelFocus sentinel
Edit Sat Name
Focus sentinelFocus sentinel
Create New Watchlist
Identifier
Orbit
Country
USRelated business
Manufacturer
LMSS
Mission
Operational Defense Communications
Bus & Motor
A2100M, BT-4/AJ-EP?
Mass
6,200 kg wet, ~4,000 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 2 Pan, 13.5 m
Radar Cross Section
35.027 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 6 hours ago
TLE from 6 hours ago
0 AEHF 4 (USA 288)
1 43651U 18079A 26201.81884095 -.00000276 00000-0 00000+0 0 9993
2 43651 1.4353 5.2466 0059841 355.2654 165.3478 1.00273818 28630Epoch: 2026-07-20T19:39Z
TLE epoch observation values (Epoch: 2026-07-20T19:39:07.858Z)
Latitude
0.48804°
Longitude
-67.33095°
Altitude
36,029.295 km
Speed
3.057 km/s
True Right ascension
11h 04m 11s
True Declination
0° 29' 15"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
15:02:30
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
36,039.415 km
Perigee altitude
35,534.774 km
Semi-major axis
42,165.232 km
Eccentricity
0.00598
Inclination
1.4353°
RAAN
5.2466°
Arg. of periapsis
355.2654°
True anomaly
165.52001°
Mean anomaly
165.3478°
Eccentric anomaly
165.43403°
Mean motion
0.25068 °/min
Orbital period
1,436.12 mins
BSTAR
0
Loading maneuver chart data...
Computing Atmospheric mass density...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Loading historical data...
Other satellites on launch #79 in the year 2018 (2018-10-17 UTC)
Did you know?
You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.AEHF 4 (USA 288) Visibility forecast
Loading observer location...
Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 1440 mins | 2026-07-21 02:07:32.083Z | 131.497° SE | 2026-07-21 15:23:32.083Z | 128.008° SE | 27.054° | 2026-07-22 02:07:32.083Z | 131.499° SE |
Loading historical data...
43651 neighbors
Authenticating...
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
Click to sort rows by RSO header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Type header in ascending order | Click to sort rows by Inclination Δ header in ascending order | Click to sort rows by RAAN Δ header in ascending order | Click to sort rows by Coplanar Angle header in ascending order | Click to sort rows by SMA Δ header in ascending order | Click to sort rows by Orbital period header in ascending order | Click to sort rows by <5km Md TCA header in descending order |
|---|
CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
Authenticating...
Click to sort rows by Secondary header in ascending order | Click to sort rows by Secondary name header in ascending order | Click to sort rows by Country header in ascending order | Click to sort rows by Owner header in ascending order | Click to sort rows by Obj. Type header in ascending order | Click to sort rows by Miss dist. header in ascending order | Click to sort rows by Rel. speed header in ascending order | Click to sort rows by Apr. angle header in ascending order | Click to sort rows by TCA header in descending order |
|---|