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CelesTrak

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  • Name(s): Top 25 by Minimum Range
  • Order by Minimum Range
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Data current as of 2024 Nov 13 08:06:02 UTC

Computation Interval: Start = 2024 Nov 13 08:00:00 UTC, Stop = 2024 Nov 20 08:00:00 UTC
Computation Threshold: 5.0 km
Considering: 10,375 Primaries, 26,687 Secondaries (74,947 Conjunctions)
13 SGP4 Propagation Errors
Computation run time: 06h 02m 52.988s

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 59680 OBJECT D [+] 0.772 2024-11-13 22:54:17.476 0.003 15.048
50 km All 26740 PEGASUS DEB [-] 1.024 2.071E-01 0.002
GP Data 47768 STARLINK-2189 [P] 3.234 2024-11-16 03:36:55.157 0.014 8.769
50 km All 49319 OBJECT E [-] 3.020 3.559E-01 0.004
GP Data 43005 MOHAMMED VI-A [+] 7.003 2024-11-19 23:42:30.244 0.029 14.817
50 km All 61793 OBJECT B [+] 6.846 1.922E-03 0.018
GP Data 37730 SJ-11-03 [+] 1.849 2024-11-14 23:09:03.084 0.035 15.022
50 km All 23106 PEGASUS R/B [-] 2.051 8.672E-04 0.025
GP Data 58268 CONNECTA T3.2 [+] 6.372 2024-11-19 02:34:15.612 0.044 14.673
50 km All 59264 STARLINK-31645 [+] 6.005 2.822E-02 0.025
GP Data 39090 STRAND-1 [+] 1.944 2024-11-15 00:40:49.715 0.047 14.683
50 km All 54555 CZ-6A DEB [-] 2.076 7.514E-04 0.030
GP Data 49455 STARLINK-3145 [+] 0.764 2024-11-13 19:02:52.113 0.051 14.675
50 km All 60015 OBJECT D [-] 0.660 2.108E-02 0.029
GP Data 53537 STARLINK-4120 [+] 4.848 2024-11-17 11:34:20.801 0.051 13.525
50 km All 59225 ELECTRON KICK STAGE R/B [-] 4.599 2.745E-02 0.022
GP Data 53172 STARLINK-4299 [+] 2.012 2024-11-14 23:00:54.284 0.054 7.162
50 km All 35248 CZ-4C DEB [-] 2.239 3.801E-02 0.015
GP Data 54101 STARLINK-5204 [+] 1.796 2024-11-14 22:58:09.425 0.054 10.905
50 km All 48609 FALCON 9 DEB [-] 2.016 3.204E-02 0.018
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 54851 STARLINK-5084 [+] 0.724 2024-11-13 17:29:15.781 0.054 6.352
50 km All 58754 CZ-2C R/B [-] 1.354 3.923E-02 0.014
GP Data 61906 OBJECT N [+] 0.395 2024-11-13 12:33:38.667 0.055 0.000
50 km All 61907 OBJECT P [+] 0.395 1.464E-03 0.013
GP Data 57031 OBJECT AD [+] 3.893 2024-11-17 01:28:53.956 0.056 3.817
50 km All 58922 OBJECT F [+] 3.897 1.389E-03 0.013
GP Data 59803 STARLINK-31794 [+] 6.747 2024-11-19 12:15:00.145 0.056 11.166
50 km All 45638 FREGAT DEB [-] 6.980 3.027E-02 0.018
GP Data 25397 TECHSAT 1B (GO-32) [P] 6.801 2024-11-19 16:56:41.932 0.057 13.730
50 km All 31841 FENGYUN 1C DEB [-] 13.391 3.457E-04 0.027
GP Data 49137 STARLINK-3055 [+] 0.773 2024-11-13 18:42:46.956 0.060 14.101
50 km All 9822 COSMOS 886 DEB [-] 0.845 1.897E-02 0.027
GP Data 59032 STARLINK-30862 [+] 4.369 2024-11-17 06:51:23.497 0.060 14.341
50 km All 44623 CZ-4C R/B [-] 4.567 1.683E-02 0.031
GP Data 40055 CANX-4 [+] 5.429 2024-11-18 13:47:18.284 0.061 12.204
50 km All 35401 SCOUT G-1 DEB [-] 5.535 7.732E-04 0.022
GP Data 38358 NUSTAR [+] 5.275 2024-11-18 06:35:32.560 0.067 11.033
50 km All 56318 STARLINK-5954 [+] 5.365 2.120E-02 0.022
GP Data 61227 OBJECT A [+] 4.204 2024-11-17 09:09:19.184 0.070 0.003
50 km All 61229 OBJECT C [+] 4.205 8.830E-04 0.017
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 35935 ITUPSAT1 [+] 5.062 2024-11-17 22:43:53.617 0.071 13.389
50 km All 31330 FENGYUN 1C DEB [-] 5.680 4.699E-04 0.031
GP Data 41772 SKYSAT-C5 [+] 5.680 2024-11-18 19:41:29.572 0.073 13.340
50 km All 56443 ELECTRON KICK STAGE R/B [-] 5.974 2.665E-04 0.030
GP Data 39240 YAOGAN-17 01B [+] 1.275 2024-11-14 09:27:26.498 0.075 14.395
50 km All 41147 NOAA 16 DEB [-] 2.086 3.219E-04 0.043
GP Data 42839 LEMUR-2-MONSON [+] 2.095 2024-11-14 20:59:43.042 0.078 14.993
50 km All 44390 ICEYE-X4 [+] 1.779 2.625E-04 0.051
GP Data 56450 STARLINK-5970 [+] 1.756 2024-11-14 16:44:33.366 0.078 11.700
50 km All 40798 COSMOS 2251 DEB [-] 19.619 1.491E-02 0.027

25 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.