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CelesTrak

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  • Name(s): Top 10 by Relative Speed
  • Order by Relative Speed
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Data current as of 2024 Jul 17 00:05:36 UTC

Computation Interval: Start = 2024 Jul 17 00:00:00 UTC, Stop = 2024 Jul 24 00:00:00 UTC
Computation Threshold: 5.0 km
Considering: 10,061 Primaries, 26,280 Secondaries (68,839 Conjunctions)
14 SGP4 Propagation Errors
Computation run time: 05h 02m 18.506s

SOCRATES Format Documentation

See notes at bottom of page for data field descriptions

Data
&
Graphs
NORAD
Catalog
Number
Name [Ops Status] Days
Since
Epoch
TCA
(UTC)
Min
Range
(km)
Relative
Speed
(km/sec)
Max
Probability
Dilution
Threshold
(km)
GP Data 51053 HYPSO-1 [+] 6.780 2024-07-23 14:49:11.962 4.084 17.256
50 km All 48090 COSMOS 1024 DEB [-] 7.950 1.039E-07 2.450
GP Data 58330 PICO-01G005 [+] 3.704 2024-07-20 11:13:08.844 4.292 16.932
50 km All 16445 SL-12 R/B(AUX MOTOR) [-] 4.459 6.090E-08 2.729
GP Data 56332 STARLINK-5093 [+] 1.887 2024-07-18 11:30:57.165 2.327 16.904
50 km All 12624 DYNAMICS EXPLORER 1 [?] 1.998 1.830E-05 1.438
GP Data 58260 LEMUR-2-DILIGHTFUL [+] 5.806 2024-07-22 13:52:59.940 3.648 16.894
50 km All 16445 SL-12 R/B(AUX MOTOR) [-] 6.570 8.547E-08 2.285
GP Data 56958 GHOST-3 [+] 1.187 2024-07-17 12:01:40.926 3.609 16.885
50 km All 21220 SL-12 R/B(AUX MOTOR) [-] 0.967 8.553E-08 2.308
GP Data 48957 HAWK-3A [+] 7.352 2024-07-23 17:06:39.278 4.578 16.729
50 km All 41696 SL-12 DEB [-] 7.959 8.438E-08 2.690
GP Data 55012 CONNECTA T1.2 [+] 1.185 2024-07-17 21:49:20.219 3.773 16.628
50 km All 38600 BREEZE-M DEB [-] 2.008 1.355E-07 2.035
GP Data 52752 NUSAT-31 (RUBY PAYNE-S) [+] 5.349 2024-07-22 04:35:54.584 4.672 16.520
50 km All 43247 CZ-3B R/B [-] 6.099 8.421E-08 2.641
GP Data 53666 STARLINK-4449 [+] 2.424 2024-07-19 00:44:25.514 2.357 16.517
50 km All 16446 SL-12 R/B(AUX MOTOR) [-] 2.734 2.593E-06 1.361
GP Data 55932 STARLINK-5848 [+] 1.077 2024-07-17 16:46:02.953 4.786 16.350
50 km All 3173 OV1-13 [?] 1.276 5.851E-07 3.178

10 records found

Data Fields:
  • Data: The GP Data button links to a page which provides the GP data used to generate the associated prediction.
  • NORAD Catalog Number: NORAD Catalog Numbers of the two conjuncting objects.
  • Name: SATCAT names of the two conjuncting objects. Operational status of each object is shown in brackets, using the standard CelesTrak SATCAT codes.
  • Days Since Epoch: The number of days from the epoch of the NORAD GP or SupGP (green) element set used to produce the prediction until the time of closest approach for the conjunction.
  • TCA (UTC): Time of closest approach.
  • Min Range (km): The distance between the two conjuncting objects at the time of closest approach.
  • Relative Speed (km/sec): Relative speed of the two conjuncting objects at the time of closest approach.
  • Max Probability: Given fixed spherical object radii and relative distance at the time of closest approach (TCA), the projected covariance ellipse is sized and oriented to produce the maximum probability. For these reports the ratio of major-to-minor axes of the projected covariance ellipse is set using radial, in-track, and cross-track values of 100 m, 300 m, 100 m, respectively. If the combined object radius is greater than the relative distance, the maximum probability will be one; such occurrences are not addressed here. For more details on the maximum probability method, see Dr. Sal Alfano's paper titled "Relating Position Uncertainty to Maximum Conjunction Probability".
  • Dilution Threshold (km): The standard deviation that produces the maximum probability defines the threshold of dilution. A smaller or larger standard deviation will produce a smaller probability. In the case of computing true probability with a smaller standard deviation, the data is of sufficient quality to associate low probability with low risk. For a larger standard deviation, this is not the case and the resulting true probability calculation becomes "diluted." If operating in this dilution region, the recommendation is to obtain better data and reassess the encounter. If time or resources do not permit, then the maximum probability should be used in place of the true probability.
  • SGP4 Propagation Errors: A list of objects which were not screened because their GP data shows they have already decayed (but haven't yet been reflected in the SATCAT) or will decay prior to the end of the computation interval.