ATLAS H R/B, 17998
Orbit data source: Space-Track
ATLAS H R/B, 17998 is space debris in LEO originally from a launch on Fri, 15 May 1987 UTC via an ATLAS H launch vehicle from the Air Force Western Test Range (AFWTR). 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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17998 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
NRL
Mission
Spacecraft
Bus & Motor
MSD-PS, Unknown motor
Mass
63 kg wet, 63 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Cyl, 13.5 m
Radar Cross Section
68.331 m², Medium (>0.1 m² and < 1m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 ATLAS H R/B
1 17998U 87043B 26171.41047709 .00000585 00000-0 21985-3 0 9991
2 17998 63.3178 223.6449 0702174 117.5212 249.8961 13.51406682351693Epoch: 2026-06-20T09:51Z
TLE epoch observation values (Epoch: 2026-06-20T09:51:05.220Z)
Latitude
-0.00002°
Longitude
167.24764°
Altitude
1,279.74 km
Speed
7.114 km/s
True Right ascension
14h 54m 34s
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
00:39:27
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
1,588.617 km
Perigee altitude
543.213 km
Semi-major axis
7,444.052 km
Eccentricity
0.07022
Inclination
63.3178°
RAAN
223.6449°
Arg. of periapsis
117.5212°
True anomaly
242.58141°
Mean anomaly
249.8961°
Eccentric anomaly
246.21466°
Mean motion
3.37932 °/min
Orbital period
106.53 mins
BSTAR
0.00021985
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Other satellites on launch #43 in the year 1987 (1987-05-15 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.ATLAS H 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. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-06-22 13:54:55.311Z | 321.58° NNW | 2026-06-22 13:57:55.311Z | 282.784° WNW | 42.892° | 2026-06-22 14:01:55.311Z | 153.821° SSE |
| 8 mins | 2026-06-23 03:40:55.311Z | 162.097° S | 2026-06-23 03:44:55.311Z | 118.552° SE | 23.548° | 2026-06-23 03:48:55.311Z | 66.526° ENE |
| 9 mins | 2026-06-23 05:29:55.311Z | 235.588° WSW | 2026-06-23 05:34:55.311Z | 309.013° NW | 37.44° | 2026-06-23 05:38:55.311Z | 19.581° NNE |
| 6 mins | 2026-06-23 12:59:55.311Z | 350.024° N | 2026-06-23 13:01:55.311Z | 36.39° NE | 32.547° | 2026-06-23 13:05:55.311Z | 121.462° SE |
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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