SOCRATES

Search Results


Search parameters:

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


Data current as of 2020 Jul 11 00:06 UTC

Computation Interval: Start = 2020 Jul 11 00:00:00.000, Stop = 2020 Jul 18 00:00:00.000
Computation Threshold: 5.0 km
Considering: 5,532 Primaries, 18,843 Secondaries (33,884 Conjunctions)

See notes at bottom of page for data field descriptions

Re-sort results by Maximum Probability, Time In.

Action NORAD
Catalog
Number
Name Days
Since
Epoch
Max
Probability
Dilution
Threshold
(km)
Min
Range
(km)
Relative
Velocity
(km/sec)
Start
(UTC)
TCA
(UTC)
Stop
(UTC)
43479 IRIDIUM 152 [+] 6.428 3.152E-02 0.009 0.017 14.412
13028 SL-8 R/B [-] 6.632 2020 Jul 16 21:24:21.578 2020 Jul 16 21:24:21.925 2020 Jul 16 21:24:22.272
44421 COSMOS 2535 [+] 0.509 7.060E-03 0.008 0.019 0.000
44835 COSMOS 2543 [+] 0.644 2020 Jul 11 00:00:00.000 2020 Jul 11 05:38:35.529 2020 Jul 14 08:49:11.795
01292 GGSE 3 [?] 1.995 3.961E-03 0.013 0.019 14.776
32354 FENGYUN 1C DEB [-] 2.523 2020 Jul 12 12:42:15.499 2020 Jul 12 12:42:15.837 2020 Jul 12 12:42:16.175
04237 OPS 7613 (P/L 4) [?] 6.984 9.972E-04 0.024 0.043 14.262
28995 METEOR 2-17 DEB [-] 6.633 2020 Jul 17 09:24:21.235 2020 Jul 17 09:24:21.585 2020 Jul 17 09:24:21.936
43712 TIANPING 1A [+] 4.236 8.445E-04 0.027 0.046 14.759
32435 FENGYUN 1C DEB [-] 4.171 2020 Jul 15 00:35:45.422 2020 Jul 15 00:35:45.761 2020 Jul 15 00:35:46.100
43609 HAIYANG-1C [+] 4.320 4.282E-04 0.039 0.062 14.657
33736 FENGYUN 1C DEB [-] 4.614 2020 Jul 15 03:08:47.745 2020 Jul 15 03:08:48.086 2020 Jul 15 03:08:48.427
13148 COSMOS 1354 [?] 7.375 8.168E-04 0.046 0.066 14.865
31007 FENGYUN 1C DEB [-] 7.892 2020 Jul 17 20:40:26.962 2020 Jul 17 20:40:27.298 2020 Jul 17 20:40:27.634
43775 OBJECT T [+] 6.712 3.558E-04 0.042 0.069 14.864
45140 ONEWEB-0028 [+] 6.606 2020 Jul 17 04:33:10.302 2020 Jul 17 04:33:10.639 2020 Jul 17 04:33:10.975
43801 OBJECT AV [+] 2.283 3.329E-04 0.044 0.071 14.858
32410 FENGYUN 1C DEB [-] 2.671 2020 Jul 13 02:01:29.238 2020 Jul 13 02:01:29.575 2020 Jul 13 02:01:29.911
44736 STARLINK-1031 [+] 5.393 7.997E-04 0.018 0.071 6.062
45071 STARLINK-1167 [+] 5.726 2020 Jul 16 07:25:45.058 2020 Jul 16 07:25:45.883 2020 Jul 16 07:25:46.707

10 records found

Data Fields:
  • Action: The Analysis button links to a page which provides a capability to build an interactive 3-D STK/CAT (Conjunction Analysis Tools) scenario detailing the conjunction.
  • NORAD Catalog Number: NORAD Catalog Numbers of the two conjuncting objects.
  • Name: Common 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 two-line element set or operator ephemerides (green) used to produce the prediction until the time of closest approach for the conjunction.
  • 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.
  • 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.
  • Min Range (km): The distance between the two conjuncting objects at the time of closest approach.
  • Start (UTC): Time when the two conjuncting objects come within the computation threshold from each other.
  • TCA (UTC): Time of closest approach.
  • Stop (UTC): Time when the two conjuncting objects move beyond the computation threshold from each other.
  • Relative Velocity (km/sec): Relative velocity of the two conjuncting objects at the time of closest approach.

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Dr. T.S. Kelso [TS.Kelso@celestrak.com]
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Last updated: 2020 Jul 11 02:58:44 UTC
Accessed 1 times since 2000 December 16
Current system time: 2020 Jul 11 05:09:37 UTC