More close-calls

ROB MATSON (ROBERT.D.MATSON@cpmx.saic.com)
18 Sep 1997 17:52:14 -0800

Here are several more predicted close approaches between satellites
in the coming days:

Cosmos 858 & Iridium 18: 0.3 km
-------------------------------
Target satellite: #09443
Name: Cosmos 858
Perigee:   776.67 km   Apogee:   795.87 km

   Date     UTC Time   Norad           Name           Range (km) NdAng EphAge
 9/22/1997  7:58:59.19 24871 Iridium 18                    0.3   151.3  +4.21


Cosmos 2334 & Cosmos 1275 Deb K: 0.7 km
---------------------------------------
Target satellite: #12655
Name: Cosmos 1275 Deb K
Perigee:   957.66 km   Apogee:  1014.57 km

   Date     UTC Time   Norad           Name           Range (km) NdAng EphAge
 9/20/1997  6:51:14.72 24304 Cosmos 2334                   0.7    99.2  +2.18


DMSP 5D-2 S-14 & Meteor 1-25 R/B: 1.0 km
----------------------------------------
Target satellite: #08846
Name: Meteor 1-25 R/B
Perigee:   840.87 km   Apogee:   894.13 km

   Date     UTC Time   Norad           Name           Range (km) NdAng EphAge
 9/19/1997 16:37:05.65 24753 DMSP 5D-2 S-14                1.0   102.3  +1.54


Iridium 10 & Cosmos 1814 R/B: 1.1 km
------------------------------------
Target satellite: #17304
Name: Cosmos 1814 R/B
Perigee:   755.68 km   Apogee:   798.71 km

   Date     UTC Time   Norad           Name           Range (km) NdAng EphAge
 9/22/1997 16:28:40.38 24838 Iridium 10                    1.1    20.3  +4.51


TLEs used were latest available from OIG:

Meteor 1-25 R/B
1 08846U 76043B   97261.07501932 +.00000010 +00000-0 -14661-5 0 05146
2 08846 081.2471 112.5984 0036749 217.9901 141.8684 14.07629414096004
Cosmos 858
1 09443U 76098A   97261.05371302 +.00000051 +00000-0 +28616-4 0 05951
2 09443 074.0453 258.6584 0013400 084.7124 275.5548 14.31636344094562
Cosmos 1275 Deb K
1 12655U 81053K   97261.05517601 +.00000027 +00000-0 +12644-4 0 05284
2 12655 082.9569 092.5165 0038635 280.3836 079.2966 13.73758389809913
Cosmos 1814 R/B
1 17304U 87006B   97261.30681514 -.00000081  00000-0 -19411-4 0  6043
2 17304  74.0548   0.3130 0030069 199.3994 160.6021 14.34360857557794
Cosmos 2334
1 24304U 96052A   97261.10804942 +.00000244 +00000-0 +24809-3 0 01592
2 24304 082.9299 285.9127 0029554 307.9619 051.8817 13.72909588051758
DMSP 5D-2 S-14
1 24753U 97012A   97261.15222068 +.00000091 +00000-0 +72425-4 0 01829
2 24753 098.9225 305.1840 0009063 140.9872 219.1956 14.12999638023514
Iridium 10
1 24838U 97030C   97261.17353291 +.00000112 +00000-0 +32940-4 0 00997
2 24838 086.3971 123.7444 0001139 133.4352 226.6938 14.34215928013246
Iridium 18
1 24871U 97034C   97261.12592465 +.00000035 +00000-0 +53001-5 0 00896
2 24871 086.4063 155.3478 0004091 050.9715 309.1851 14.34216869010209