OPS 4078 (DMSP 4B F2), 3510
Orbit data source: Space-Track
OPS 4078 (DMSP 4B F2), 3510 is a payload satellite owned by SAMSO (US) in SSO that was launched on Wed, 23 Oct 1968 UTC via a THOR BURNER 2 launch vehicle from the Air Force Western Test Range (AFWTR). 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
3510 intel report (Beta)
Focus sentinelFocus sentinel
Create New Watchlist
Focus sentinelFocus sentinel
Edit Public Description
Identifier
Orbit
Country
USRelated business
Manufacturer
RCA/East Windsor
Mission
Non-operational spacecraft
Bus & Motor
DMSP BLOCK 4B, Unknown motor
Mass
79 kg wet, 79 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Medium (>0.1 m² and <1 m²)
Expand to show TLE details & historyLast TLE update: 10 hours ago
TLE from 10 hours ago
0 OPS 4078 (DMSP 4B F2)
1 03510U 68092A 26002.33137178 .00000337 00000-0 15174-3 0 9991
2 03510 98.5519 128.0905 0030838 94.1386 266.3321 14.28188274973575Epoch: 2026-01-02T07:57Z
TLE epoch observation values (Epoch: 2026-01-02T07:57:10.521Z)
Latitude
-0.00004°
Longitude
-93.17645°
Altitude
802.208 km
Speed
7.452 km/s
True Right ascension
08h 32m 21s
True Declination
0° 00' 00"
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
17:50:18
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
817.054 km
Perigee altitude
772.813 km
Semi-major axis
7,173.07 km
Eccentricity
0.00308
Inclination
98.5519°
RAAN
128.0905°
Arg. of periapsis
94.1386°
True anomaly
265.97954°
Mean anomaly
266.3321°
Eccentric anomaly
266.15581°
Mean motion
3.57261 °/min
Orbital period
100.77 mins
BSTAR
0.00015174
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 #92 in the year 1968 (1968-10-23 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.OPS 4078 (DMSP 4B F2) 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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-01-02 20:19:14.443Z | 42.528° NE | 2026-01-02 20:23:14.443Z | 106.541° ESE | 25.809° | 2026-01-02 20:26:14.443Z | 149.527° SSE |
| 7 mins | 2026-01-02 21:59:14.443Z | 343.571° N | 2026-01-02 22:02:14.443Z | 294.496° NW | 27.777° | 2026-01-02 22:06:14.443Z | 234.345° WSW |
| 7 mins | 2026-01-03 07:38:14.443Z | 130.695° SE | 2026-01-03 07:41:14.443Z | 74.799° E | 33.994° | 2026-01-03 07:45:14.443Z | 5.14° NNE |
| 5 mins | 2026-01-03 09:19:14.443Z | 236.235° WSW | 2026-01-03 09:21:14.443Z | 267.189° W | 20.406° | 2026-01-03 09:24:14.443Z | 308.708° NW |
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 |
|---|