2026-02-15 obs for USSF-87. Notes for ID: I assigned 26029A and 26029B for the two observed payloads, and 26029C for Centaur V R/B, since the third payload is still missing. ---------- 97757 26029A 0001 G 20260215142618802 17 25 0705274-061399 17 S+119 10 97757 26029A 0001 G 20260215143626592 17 25 0715584-061510 17 S+117 10 97757 26029A 0001 G 20260215144635733 17 25 0725919-061624 17 S+117 10 97757 26029A 0001 G 20260215145643642 17 25 0736230-061737 17 S+116 10 97757 26029A 0001 G 20260215150650109 17 25 0746519-061850 17 S+116 10 97757 26029A 0001 G 20260215151700874 17 25 0756881-061964 17 S+114 10 97757 26029A 0001 G 20260215152711595 17 25 0807242-062076 17 S+113 10 97758 26029B 0001 G 20260215142618802 17 25 0704593-061511 17 S+149 10 97758 26029B 0001 G 20260215143626592 17 25 0714890-061621 17 S+146 10 97758 26029B 0001 G 20260215144635733 17 25 0725206-061729 17 S+149 10 97758 26029B 0001 G 20260215145643642 17 25 0735493-061837 17 S+143 10 97758 26029B 0001 G 20260215150650109 17 25 0745751-061943 17 S+146 10 97758 26029B 0001 G 20260215151700874 17 25 0756076-062051 17 S+144 10 97758 26029B 0001 G 20260215152716065 17 25 0806470-062155 17 S+142 10 97759 26029C 0001 G 20260215122102135 17 25 0613848-061420 17 S+115 10 97759 26029C 0001 G 20260215123115625 17 25 0624243-061484 17 S+118 10 97759 26029C 0001 G 20260215124127665 17 25 0634605-061549 17 S+109 10 97759 26029C 0001 G 20260215134219410 17 25 0736328-061957 17 S+117 10 97759 26029C 0001 G 20260215135230198 17 25 0746639-062028 17 S+109 10 97759 26029C 0001 G 20260215140235078 17 25 0756846-062095 17 S+107 10 Combined past obs, the current fitting: USSF-87 A 35409 x 35436km 1 97757U 0000000 26044.59150402 0.00000087 00000-0 50000-4 0 04 2 97757 0.5243 287.3753 0003181 235.2978 290.1500 1.01585005 07 USSF-87 B 35348 x 35517km 1 97758U 0000000 26044.59855559 0.00000087 00000-0 50000-4 0 00 2 97758 0.5541 286.7932 0020169 94.7565 73.7018 1.01548181 09 USSF-87 R/B 34568 x 35412 km 1 97759U 0000000 26045.53383140 0.00000087 00000-0 50000-4 0 08 2 97759 0.4078 279.7255 0102041 31.2846 136.8228 1.03182276 07 Now, we can address the orbit insertion and post separation story as follows: Centaur V arrived in a sub GEO orbit, ~35420km, at around 1600 UTC Feb 12th, and released multiple payloads, two of which have been found. Then Centaur V did fuel dumping, ending up with a disposal orbit with hundreds of km lower altitude. Currently, it is drifting at the speed 10.3 deg/day eastward. Payload A is 2.9 mag brighter than payload B. The latter did minor maneuvers. Currently, they are drifting eastward at the speed 4.6 and 4.7 deg/day respectively. On Sat, Feb 14, 2026 at 11:04 PM Zhuo-Xiao Wang <zhuoxiaowang_at_gmail.com> wrote: > UNID drifting eastward, coplanar with USSF-87 payload A and B, probably > USSF-87 Centaur V. > The current *presumbly disposal* orbit, several hundreds of km below GEO > altitude, is a bit strange. > > ------ Station ------ > # No ID Latitude Longitude Elev Observer > 0001 FL 39.837556 115.573330 1140 Z. Wang > ------ IOD Lines ------ > 97759 26029C 0001 G 20260214123803017 17 25 0540523-061284 17 S+128 10 > 97759 26029C 0001 G 20260214124843033 17 25 0551388-061346 17 S+123 10 > 97759 26029C 0001 G 20260214125852171 17 25 0601723-061410 17 S+124 10 > 97759 26029C 0001 G 20260214130859887 17 25 0612026-061476 17 S+123 10 > 97759 26029C 0001 G 20260214131907723 17 25 0622323-061541 17 S+109 10 > 97759 26029C 0001 G 20260214132917013 17 25 0632640-061606 17 S+118 10 > 97759 26029C 0001 G 20260214133927829 17 25 0642979-061675 17 S+105 10 > 97759 26029C 0001 G 20260214134929914 17 25 0653156-061741 17 S+111 10 > 97759 26029C 0001 G 20260214135942009 17 25 0703509-061814 17 S+107 10 > 97759 26029C 0001 G 20260214140949990 17 25 0713782-061883 17 S+107 10 > > current fitting: > 0 USSF-87 R/B 35153 x 35646 km > 1 97759U 0000000 26045.53383140 0.00000087 00000-0 50000-4 0 08 > 2 97759 0.4070 277.4961 0059024 79.6389 90.8162 1.01668911 07 > > > On Sat, Feb 14, 2026 at 3:04 AM Zhuo-Xiao Wang <zhuoxiaowang_at_gmail.com> > wrote: > >> Observed 2 payloads of USSF-87 mission: >> >> ------ Station ------ >> # No ID Latitude Longitude Elev Observer >> 0001 FL 39.837556 115.573330 1140 Z. Wang >> ------ IOD Lines ------ >> 97757 26029A 0001 G 20260213140129280 17 25 0549507-060414 17 S+117 10 >> 97757 26029A 0001 G 20260213140130756 17 25 0549535-060410 17 S+118 10 >> 97757 26029A 0001 G 20260213140132234 17 25 0549559-060411 17 S+117 10 >> 97757 26029A 0001 G 20260213140133721 17 25 0549583-060410 17 S+117 10 >> 97757 26029A 0001 G 20260213140135210 17 25 0549610-060409 17 S+117 10 >> 97757 26029A 0001 G 20260213140136677 17 25 0549635-060405 17 S+116 10 >> 97757 26029A 0001 G 20260213141138690 17 25 0559845-060517 17 S+116 10 >> 97757 26029A 0001 G 20260213141140174 17 25 0559869-060517 17 S+117 10 >> 97757 26029A 0001 G 20260213141141607 17 25 0559894-060518 17 S+117 10 >> 97757 26029A 0001 G 20260213141143049 17 25 0559916-060523 17 S+115 10 >> 97757 26029A 0001 G 20260213141144510 17 25 0559943-060517 17 S+117 10 >> 97757 26029A 0001 G 20260213141145947 17 25 0559969-060519 17 S+117 10 >> 97757 26029A 0001 G 20260213142147960 17 25 0610180-060627 17 S+117 10 >> 97757 26029A 0001 G 20260213142149391 17 25 0610206-060630 17 S+122 10 >> 97757 26029A 0001 G 20260213142150854 17 25 0610228-060629 17 S+122 10 >> 97757 26029A 0001 G 20260213142152286 17 25 0610253-060628 17 S+123 10 >> 97757 26029A 0001 G 20260213142153752 17 25 0610274-060629 17 S+122 10 >> 97757 26029A 0001 G 20260213142155203 17 25 0610302-060630 17 S+123 10 >> 97757 26029A 0001 G 20260213153019349 17 25 0719916-061391 17 S+171 10 >> 97757 26029A 0001 G 20260213153020844 17 25 0719939-061393 17 S+110 10 >> 97757 26029A 0001 G 20260213153022359 17 25 0719967-061393 17 S+158 10 >> 97757 26029A 0001 G 20260213153023846 17 25 0719991-061391 17 S+112 10 >> 97757 26029A 0001 G 20260213153025398 17 25 0720019-061392 17 S+153 10 >> 97757 26029A 0001 G 20260213153026927 17 25 0720045-061396 17 S+133 10 >> 97757 26029A 0001 G 20260213160048614 17 25 0750946-061737 17 S+111 10 >> 97757 26029A 0001 G 20260213160050092 17 25 0750972-061737 17 S+111 10 >> 97757 26029A 0001 G 20260213160051566 17 25 0750999-061738 17 S+110 10 >> 97757 26029A 0001 G 20260213160053046 17 25 0751023-061738 17 S+111 10 >> 97757 26029A 0001 G 20260213160054525 17 25 0751046-061736 17 S+111 10 >> 97757 26029A 0001 G 20260213160056000 17 25 0751070-061738 17 S+109 10 >> ------------ >> 97758 26029B 0001 G 20260213141143049 17 25 0600389-060532 17 S+166 10 >> 97758 26029B 0001 G 20260213142155203 17 25 0610771-060642 17 S+149 10 >> 97758 26029B 0001 G 20260213143158572 17 25 0621007-060745 17 S+153 10 >> 97758 26029B 0001 G 20260213144210588 17 25 0631387-060860 17 S+145 10 >> 97758 26029B 0001 G 20260213145217056 17 25 0641670-060971 17 S+150 10 >> 97758 26029B 0001 G 20260213150227812 17 25 0652030-061085 17 S+146 10 >> 97758 26029B 0001 G 20260213151238546 17 25 0702391-061199 17 S+149 10 >> 97758 26029B 0001 G 20260213153022359 17 25 0720432-061397 17 S+148 10 >> 97758 26029B 0001 G 20260213154033711 17 25 0730803-061513 17 S+146 10 >> 97758 26029B 0001 G 20260213155040812 17 25 0741097-061626 17 S+152 10 >> >> Current fitting: >> USSF-87 A 35399 x 35420km >> 1 97757U 0000000 26044.59150402 0.00000087 00000-0 50000-4 0 04 >> 2 97757 0.5248 287.4118 0002553 280.5526 244.8510 1.01631311 01 >> USSF-87 B 35414 x 35421km >> 1 97758U 0000000 26044.59855559 0.00000087 00000-0 50000-4 0 00 >> 2 97758 0.5221 287.3575 0000819 233.7114 294.4127 1.01602653 07 >> >> Some images can be seen on X post >> https://x.com/mickeywzx/status/2022017419347411272 >> >> -- >> Regards, >> Zhuoxiao >> > > > -- > Regards, > Zhuoxiao > -- Regards, Zhuoxiao _______________________________________________ Seesat-l mailing list https://lists.seesatmail.org/mailman/listinfo/seesat-lReceived on Sun Feb 15 2026 - 08:11:32 UTC
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