"Pseudo-MPEC" for XW99CEC = XV902A4

Created 2016 Nov 19 19:13:55 UT using Find_Orb

Note: Further analysis from later observations makes me reasonably sure that these were early observations of Multijunk, a piece of junk which gets its name because it's been seen many times and given many designations. Original analysis from when the object was found follows.

Further data from (H01) Magdalena Ridge and from (G96) Mt. Lemmon made it very clear that this object is in a two-day orbit and made four orbits between the first and second sets of observations. The link between those arcs is quite rough. Either the object is very light (like a piece of Mylar) and has some really serious non-gravs, or it's an active satellite.

The latter is a little difficult to believe. Not much is in two-day orbits. The main candidates are XMM-Newton (1999-066) and Vela 4a (1967-040). Except that it's not either of those objects, nor a catalogued piece of those objects. It's unlikely that uncatalogued bits would still be maneuvering. So a light bit of trash from one of those launches seems like the best candidate to me.

For customized ephemerides, cut-and-paste the 2016 November 19 observations shown below (you can leave out the November 11 arc) and put them into the big text box in the on-line version of Find_Orb, and set up your observatory code, time span, and so on.

Astrometry:
     XV902A4  C2016 11 11.38964 04 28 16.69 +10 49 46.9         x19.3 VqNEOCPG96
     XV902A4  C2016 11 11.39397 04 28 43.37 +10 52 03.2         x18.7 VqNEOCPG96
     XV902A4  C2016 11 11.39825 04 29 09.79 +10 54 16.1         x18.3 VqNEOCPG96
     XV902A4  C2016 11 11.40277 04 29 37.64 +10 56 33.5         x18.3 VqNEOCPG96
     XV902A4  C2016 11 11.44967 04 34 57.96 +11 19 44.5         x            G96
     XV902A4  C2016 11 11.44991 04 34 59.85 +11 19 51.8         x18.1 V      G96
     XV902A4  C2016 11 11.45015 04 35 01.55 +11 19 58.3         x            G96
     XV902A4  C2016 11 11.45039 04 35 03.37 +11 20 05.1         x18.4 V      G96
     XW99CEC  C2016 11 19.43356 03 54 56.57 +09 05 53.2          18.1 V D0552G96
     XW99CEC  C2016 11 19.43372 03 54 57.37 +09 05 57.1          18.2 V D0552G96
     XW99CEC  C2016 11 19.43388 03 54 58.13 +09 06 01.1          18.3 V D0552G96
     XW99CEC  C2016 11 19.43405 03 54 58.97 +09 06 04.7          18.2 V D0552G96
     XW99CEC  C2016 11 19.45396 03 56 40.74 +09 13 52.1          18.0 V D0552G96
     XW99CEC  C2016 11 19.45414 03 56 41.72 +09 13 56.3          18.1 V D0552G96
     XW99CEC  C2016 11 19.45431 03 56 42.58 +09 14 00.2          18.2 V D0552G96
     XW99CEC  C2016 11 19.45956803 56 57.82 +09 10 25.0          17.8 V D0552H01
     XW99CEC  C2016 11 19.46247103 57 14.19 +09 11 29.9          18.1 V D0552H01
     XW99CEC  C2016 11 19.46902603 57 51.81 +09 13 54.9          17.7 V D0552H01
     XW99CEC  C2016 11 19.47892 03 58 58.59 +09 23 08.9          18.1 V D0552G96
     XW99CEC  C2016 11 19.47908 03 58 59.55 +09 23 12.5          18.1 V D0552G96
     XW99CEC  C2016 11 19.47925 03 59 00.48 +09 23 16.1          18.0 V D0552G96
     XW99CEC  C2016 11 19.47941 03 59 01.38 +09 23 19.7          18.1 V D0552G96
     XW99CEC KC2016 11 19.47953 03 59 03.64 +09 25 02.2          18.3 R D0552291
     XW99CEC  C2016 11 19.47993303 58 56.27 +09 17 52.4          17.8 V D0552H01
     XW99CEC KC2016 11 19.48010 03 59 06.90 +09 25 14.7          18.3 R D0552291
     XW99CEC KC2016 11 19.48070 03 59 10.38 +09 25 28.0          18.2 R D0552291
     XW99CEC  C2016 11 19.49818 04 00 53.43 +09 29 58.7                 D0552G96
     XW99CEC  C2016 11 19.49834 04 00 54.48 +09 30 02.2          18.2 V D0552G96
     XW99CEC  C2016 11 19.49851 04 00 55.48 +09 30 05.8          18.1 V D0552G96
     XW99CEC  C2016 11 19.49870 04 00 56.73 +09 30 09.9          18.3 V D0552G96

Station data:
(291) LPL/Spacewatch II (N31.961626 W111.599100)  US/Arizona.  1.8-m f/2.7
    reflector + CCD.
(G96) Mt. Lemmon Survey (N32.442751 W110.788720)  US/Arizona.   Observers E.
    J. Christensen, A. R. Gibbs, A. D. Grauer, R. E. Hill, J. A. Johnson, R. A.
    Kowalski, S. M. Larson, F. C. Shelly.  1.5-m reflector + CCD.
(H01) Magdalena Ridge Observatory, Socorro (N33.985148 W107.189200)  US/New Mexico.
      Observers W. H. Ryan, E. V. Ryan.  Measurer W. H. Ryan.  2.4-m f/8.9
    reflector + CCD.

Orbital elements:  XV902A4
   Perigee 2016 Nov 18.323245 +/- 0.00669 TT =  7:45:28 (JD 2457710.823245)
Epoch 2016 Nov 19.0 TT = JDT 2457711.5                        Find_Orb
M 116.874202 +/- 0.9                (J2000 equatorial)
n 172.697909557 +/- 0.301           Peri.  213.327817 +/- 0.12
a 68930.60957 +/- 80.1              Node    26.376258 +/- 0.044
e   0.80239288 +/- 0.000305         Incl.   18.052713 +/- 0.0031
P3001.72m/2.085d           H 33.0   G  0.15   U 11.9
q 13621.17907 +/- 36    Q 124240.0400 +/- 126
22 of 30 observations 2016 Nov. 19 (93.8 min); mean residual 0".290
Residuals in arcseconds: 
161111 G96(9720- 2473-)   161119 G96 .251- .203+    161119 G96 .030- .156-
161111 G96(9657- 2454-)   161119 G96 .249- .282-    161119 G96 .384- .026-
161111 G96(9598- 2437-)   161119 G96 .091- .193-    161119 291 .497- .129-
161111 G96(9539- 2420-)   161119 G96 .326+ .120-    161119 H01 .405+ .118+
161111 G96(8738- 2197-)   161119 G96 .258- .117-    161119 291 .582- 6.7m+
161111 G96(8732- 2195-)   161119 H01 .247+ .125+    161119 291 .060- .307+
161111 G96(8729- 2194-)   161119 H01 3.5m+ .083+    161119 G96 .460- .254-
161111 G96(8723- 2193-)   161119 H01 .291+ .104-    161119 G96 .471+ .092-
161119 G96 .040+ 4.2m-    161119 G96 .177+ .196-    161119 G96 .259- .039-
161119 G96 .194+ .049+    161119 G96 .726+ .068-    161119 G96 .871+ .099+

Ephemerides (geocentric):
Date (UTC) HH   RA              Dec         delta   r     elong  mag " sig PA
---- -- -- --  ------------   ------------  ------ ------ -----  --- ---- ---
2016 11 19 19  04 51 55.655   +13 19 38.63  109641 .98878 162.0 18.3  108  75
2016 11 19 20  04 58 57.475   +13 41 37.37  106516 .98875 160.6 18.2  142  75
2016 11 19 21  05 06 27.731   +14 04 11.41  103041 .98871 159.0 18.2  184  76
2016 11 19 22  05 14 32.829   +14 27 27.11   99195 .98867 157.3 18.2  235  77
2016 11 19 23  05 23 21.096   +14 51 31.15   94954 .98863 155.4 18.2  299  78
2016 11 20 00  05 33 03.647   +15 16 30.21   90288 .98858 153.3 18.1  381  79
2016 11 20 01  05 43 55.776   +15 42 30.07   85160 .98853 150.9 18.1  485  80
2016 11 20 02  05 56 19.289   +16 09 33.50   79525 .98848 148.1 18.0  624  81
2016 11 20 03  06 10 46.670   +16 37 35.15   73325 .98842 144.8 17.9  814  82
2016 11 20 04  06 28 09.010   +17 06 08.74   66484 .98836 140.9 17.8 1085  83
2016 11 20 05  06 49 52.508   +17 33 52.56   58905 .98829 135.9 17.7 1500  85
2016 11 20 06  07 18 36.970   +17 56 44.61   50455 .98821 129.3 17.5 2191  87
2016 11 20 07  08 00 00.679   +18 01 45.19   40965 .98812 119.7 17.3 3513  91
2016 11 20 08  09 08 35.184   +16 57 37.29   30267 .98803 103.7 17.2 6668  96
2016 11 20 09  11 33 54.828   +10 02 57.91   18838 .98792  68.4 17.8 289' 105
2016 11 20 10  17 29 01.090   -15 06 24.58   14196 .98788  25.4 22?? 543' 100
2016 11 20 11  21 55 42.244   -15 22 06.09   23909 .98795  87.4 17.3 182'  81
2016 11 20 12  23 32 27.414   -10 08 15.46   35212 .98803 111.1 17.3 4514  75
2016 11 20 13  00 21 55.879   -06 37 47.87   45358 .98811 123.6 17.5 2383  74
2016 11 20 14  00 53 37.070   -04 10 57.24   54360 .98817 131.6 17.6 1421  73
2016 11 20 15  01 16 32.443   -02 20 57.81   62401 .98823 137.4 17.8  898  73
2016 11 20 16  01 34 24.097   -00 54 00.88   69636 .98828 141.8 17.9  577  74
2016 11 20 17  01 49 01.578   +00 17 30.34   76179 .98833 145.5 18.0  364  75
2016 11 20 18  02 01 25.991   +01 18 07.64   82118 .98837 148.5 18.0  214  77
2016 11 20 19  02 12 14.535   +02 10 43.47   87519 .98840 151.1 18.1  104  81
2016 11 20 20  02 21 51.392   +02 57 13.10   92434 .98843 153.4 18.2   24 108
2016 11 20 21  02 30 33.106   +03 38 56.87   96905 .98846 155.5 18.2   46  56
2016 11 20 22  02 38 31.471   +04 16 52.84  100965 .98849 157.3 18.2   96  65
2016 11 20 23  02 45 55.191   +04 51 44.17  104641 .98851 159.0 18.3  138  68
2016 11 21 00  02 52 50.877   +05 24 03.79  107956 .98853 160.5 18.3  172  69
2016 11 21 01  02 59 23.682   +05 54 17.38  110929 .98855 161.9 18.3  200  70
2016 11 21 02  03 05 37.718   +06 22 45.38  113574 .98856 163.1 18.3  223  71
2016 11 21 03  03 11 36.340   +06 49 44.31  115906 .98857 164.3 18.3  243  71
2016 11 21 04  03 17 22.334   +07 15 27.78  117935 .98858 165.4 18.3  260  72
2016 11 21 05  03 22 58.072   +07 40 07.15  119670 .98859 166.4 18.3  274  72
2016 11 21 06  03 28 25.603   +08 03 52.05  121118 .98859 167.2 18.3  286  73
2016 11 21 07  03 33 46.743   +08 26 50.76  122285 .98859 168.0 18.3  296  73
2016 11 21 08  03 39 03.128   +08 49 10.51  123176 .98859 168.6 18.3  304  73
2016 11 21 09  03 44 16.271   +09 10 57.69  123795 .98859 169.2 18.3  311  74
2016 11 21 10  03 49 27.598   +09 32 18.04  124143 .98859 169.5 18.3  316  74
2016 11 21 11  03 54 38.486   +09 53 16.79  124223 .98858 169.8 18.3  321  74
2016 11 21 12  03 59 50.299   +10 13 58.79  124034 .98857 169.9 18.3  324  75
2016 11 21 13  04 05 04.414   +10 34 28.59  123576 .98856 169.8 18.2  326  75
2016 11 21 14  04 10 22.260   +10 54 50.57  122846 .98855 169.5 18.2  327  76
2016 11 21 15  04 15 45.351   +11 15 08.97  121843 .98853 169.1 18.2  327  76
2016 11 21 16  04 21 15.326   +11 35 28.01  120562 .98851 168.6 18.2  326  76
2016 11 21 17  04 26 54.001   +11 55 51.92  118998 .98849 167.9 18.2  324  77
2016 11 21 18  04 32 43.420   +12 16 25.06  117144 .98847 167.1 18.2  321  77
2016 11 21 19  04 38 45.941   +12 37 11.94  114993 .98844 166.1 18.2  316  78
2016 11 21 20  04 45 04.326   +12 58 17.33  112535 .98842 165.0 18.2  310  78
2016 11 21 21  04 51 41.874   +13 19 46.33  109757 .98839 163.8 18.2  302  79
2016 11 21 22  04 58 42.608   +13 41 44.39  106647 .98835 162.5 18.2  293  79
2016 11 21 23  05 06 11.521   +14 04 17.43  103187 .98832 161.0 18.2  281  80
2016 11 22 00  05 14 14.952   +14 27 31.79   99356 .98828 159.3 18.1  266  81
2016 11 22 01  05 23 01.137   +14 51 34.17   95132 .98824 157.4 18.1  248  82
2016 11 22 02  05 32 41.051   +15 16 31.26   90484 .98819 155.4 18.1  224  83
2016 11 22 03  05 43 29.781   +15 42 28.92   85375 .98814 153.0 18.0  194  85
2016 11 22 04  05 55 48.805   +16 09 30.14   79761 .98809 150.2 17.9  155  87
2016 11 22 05  06 10 10.058   +16 37 30.07   73584 .98803 147.0 17.8  102  92
2016 11 22 06  06 27 23.654   +17 06 03.76   66769 .98797 143.1 17.7   30 119
2016 11 22 07  06 48 53.882   +17 33 53.01   59220 .98790 138.2 17.6   91  73
2016 11 22 08  07 17 16.363   +17 57 06.28   50806 .98782 131.7 17.5  276  83
2016 11 22 09  07 57 58.566   +18 03 21.24   41357 .98774 122.3 17.3  623  89
2016 11 22 10  09 04 56.749   +17 04 16.87   30702 .98764 106.6 17.1 1431  95
2016 11 22 11  11 25 15.694   +10 37 33.15   19246 .98753  72.6 17.6 4058 104
2016 11 22 12  17 13 18.589   -14 24 59.63   14016 .98748  20.0 23?? 7388 101
2016 11 22 13  21 50 26.391   -15 35 39.44   23464 .98754  84.1 17.4 1935  82
2016 11 22 14  23 30 18.464   -10 17 20.59   34805 .98762 108.5 17.3  416  79
2016 11 22 15  00 20 45.382   -06 43 27.77   45001 .98770 121.2 17.5   70  51
2016 11 22 16  00 52 52.061   -04 14 43.45   54045 .98776 129.3 17.7  276  67
2016 11 22 17  01 16 00.953   -02 23 36.09   62121 .98782 135.2 17.8  386  69
2016 11 22 18  01 34 00.698   -00 55 55.27   69385 .98787 139.7 17.9  452  69
2016 11 22 19  01 48 43.426   +00 16 06.10   75953 .98792 143.4 18.0  494  70
2016 11 22 20  02 01 11.433   +01 17 05.12   81915 .98796 146.5 18.1  524  70
2016 11 22 21  02 12 02.537   +02 09 57.17   87336 .98800 149.1 18.2  545  70
2016 11 22 22  02 21 41.269   +02 56 39.25   92270 .98803 151.4 18.2  561  71
2016 11 22 23  02 30 24.379   +03 38 32.82   96758 .98806 153.5 18.3  573  71
2016 11 23 00  02 38 23.796   +04 16 36.61  100834 .98808 155.4 18.3  583  71
2016 11 23 01  02 45 48.308   +04 51 34.29  104525 .98811 157.1 18.3  590  71
2016 11 23 02  02 52 44.586   +05 23 59.10  107854 .98813 158.7 18.3  597  72
2016 11 23 03  02 59 17.823   +05 54 16.99  110841 .98814 160.1 18.3  603  72
2016 11 23 04  03 05 32.163   +06 22 48.54  113500 .98816 161.5 18.4  608  72
2016 11 23 05  03 11 30.977   +06 49 50.42  115845 .98817 162.7 18.4  612  72
2016 11 23 06  03 17 17.071   +07 15 36.34  117886 .98818 163.9 18.4  616  73
2016 11 23 07  03 22 52.824   +07 40 17.72  119634 .98819 164.9 18.4  620  73
2016 11 23 08  03 28 20.296   +08 04 04.26  121094 .98819 165.9 18.3  623  73
2016 11 23 09  03 33 41.305   +08 27 04.29  122274 .98820 166.8 18.3  627  74
2016 11 23 10  03 38 57.493   +08 49 25.06  123177 .98820 167.6 18.3  630  74
2016 11 23 11  03 44 10.372   +09 11 12.99  123808 .98820 168.3 18.3  634  74
2016 11 23 12  03 49 21.368   +09 32 33.85  124169 .98819 168.9 18.3  637  74
2016 11 23 13  03 54 31.858   +09 53 32.87  124261 .98819 169.4 18.3  641  75
2016 11 23 14  03 59 43.200   +10 14 14.91  124085 .98818 169.8 18.3  645  75
2016 11 23 15  04 04 56.768   +10 34 44.55  123640 .98817 170.0 18.2  650  75
2016 11 23 16  04 10 13.984   +10 55 06.14  122924 .98816 170.0 18.2  655  76
2016 11 23 17  04 15 36.354   +11 15 23.95  121934 .98814 169.9 18.2  660  76
2016 11 23 18  04 21 05.506   +11 35 42.17  120667 .98813 169.5 18.2  666  76
2016 11 23 19  04 26 43.239   +11 56 05.04  119117 .98811 169.1 18.2  673  77
2016 11 23 20  04 32 31.582   +12 16 36.89  117278 .98808 168.4 18.2  681  77
2016 11 23 21  04 38 32.868   +12 37 22.25  115142 .98806 167.6 18.2  690  77
2016 11 23 22  04 44 49.829   +12 58 25.84  112700 .98803 166.7 18.2  700  78