SOCRATES Plus

Search Results

 CelesTrak

Search parameters:

  • Name(s): Top 10 by Minimum Range
  • Order by Minimum Range
  • Return first 10 items

Data current as of 2024 Sep 08 16:05:34 UTC

Computation Interval: Start = 2024 Sep 08 16:00:00 UTC, Stop = 2024 Sep 15 16:00:00 UTC
Computation Threshold: 5.0 km
Considering: 10,251 Primaries, 26,617 Secondaries (70,847 Conjunctions)
27 SGP4 Propagation Errors
Computation run time: 05h 21m 40.569s

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 43799 HAWK-C [+] 4.381 2024-09-12 01:44:13.254 0.024 15.054
50 km All 13030 SL-8 DEB [-] 3.943 2.698E-03 0.016
GP Data 55104 SHARJAHSAT-1 [+] 2.074 2024-09-10 11:56:58.786 0.026 9.496
50 km All 60466 YAOGAN-43 01J [+] 2.337 5.381E-03 0.007
GP Data 25985 ORBCOMM FM35 [+] 7.520 2024-09-15 04:45:16.063 0.034 14.234
50 km All 30622 FENGYUN 1C DEB [-] 7.286 4.875E-03 0.018
GP Data 48321 STARLINK-2457 [+] 6.117 2024-09-13 22:32:06.252 0.035 13.041
50 km All 49962 SHIJIAN-6 05B (SJ-6 05B) [+] 5.998 6.139E-02 0.014
GP Data 56153 PIESAT A [+] 5.395 2024-09-12 23:20:50.124 0.041 0.001
50 km All 56156 PIESAT D [+] 5.395 2.636E-03 0.010
GP Data 56153 PIESAT A [+] 5.461 2024-09-13 00:56:01.892 0.042 0.001
50 km All 56156 PIESAT D [+] 5.461 2.636E-03 0.010
GP Data 49421 STARLINK-3112 [+] 7.255 2024-09-15 04:24:37.384 0.045 13.560
50 km All 33935 COSMOS 2251 DEB [-] 6.893 3.491E-02 0.020
GP Data 39076 GLOBALSTAR M078 [+] 5.406 2024-09-13 21:53:15.250 0.047 7.919
50 km All 23446 COSMOS 2304 [?] 6.026 1.775E-03 0.013
GP Data 46905 RISAT-2BR2 [+] 6.676 2024-09-15 03:27:27.555 0.051 11.432
50 km All 36800 PSLV R/B [-] 6.665 1.193E-03 0.017
GP Data 53926 STARLINK-5014 [+] 1.599 2024-09-09 07:43:21.295 0.051 7.758
50 km All 31758 FENGYUN 1C DEB [-] 0.990 4.212E-02 0.014

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.