SL-3 R/B, 877
Orbit data source: Space-Track
SL-3 R/B, 877 is space debris in LEO originally from a launch on Fri, 28 Aug 1964 UTC launched from the Tyuratam Missile And Space Complex (TTMTR). Debris objects in space refer to the collection of defunct objects orbiting the Earth. Examples of debris include non-operational satellites, rocket bodies, and fragments generated from explosions, collisions, or faulty payload assembly.
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Identifier
Orbit
Country
CISRelated business
Manufacturer
Progress
Mission
Spacecraft
Bus & Motor
BLOK-E, Unknown motor
Mass
1,440 kg wet, 1,440 kg dry
Launch date (UTC)
Launch vehicle
Unknown
Launch site
Object type
Shape & HBR
Unknown
Radar Cross Section
Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 7 hours ago
TLE from 7 hours ago
0 SL-3 R/B
1 877U 64053B 26122.13829383 .00000171 00000-0 57378-4 0 9993
2 877 65.0760 174.5304 0081223 275.4724 83.7115 14.61402855274609Epoch: 2026-05-02T03:19Z
TLE epoch observation values (Epoch: 2026-05-02T03:19:08.586Z)
Latitude
-0.00006°
Longitude
-95.3159°
Altitude
684.827 km
Speed
7.518 km/s
True Right ascension
11h 38m 07s
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
17:38:07
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
744.583 km
Perigee altitude
629.81 km
Semi-major axis
7,065.333 km
Eccentricity
0.00812
Inclination
65.076°
RAAN
174.5304°
Arg. of periapsis
275.4724°
True anomaly
84.63764°
Mean anomaly
83.7115°
Eccentric anomaly
84.17447°
Mean motion
3.65464 °/min
Orbital period
98.51 mins
BSTAR
0.000057378
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Other satellites on launch #53 in the year 1964 (1964-08-28 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.SL-3 R/B Visibility forecast
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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. |
|---|---|---|---|---|---|---|---|
| 9 mins | 2026-05-02 13:42:16.094Z | 340.766° N | 2026-05-02 13:46:16.094Z | 35.587° NE | 35.778° | 2026-05-02 13:51:16.094Z | 126.602° SE |
| 6 mins | 2026-05-02 15:25:16.094Z | 288.102° WNW | 2026-05-02 15:28:16.094Z | 242.594° WSW | 20.407° | 2026-05-02 15:31:16.094Z | 203.63° SW |
| 5 mins | 2026-05-03 04:06:16.094Z | 141.569° SSE | 2026-05-03 04:08:16.094Z | 108.165° ESE | 21.704° | 2026-05-03 04:11:16.094Z | 65.293° ENE |
| 7 mins | 2026-05-03 05:46:16.094Z | 244.676° WSW | 2026-05-03 05:49:16.094Z | 306.826° NW | 34.995° | 2026-05-03 05:53:16.094Z | 15.865° NNE |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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