"Pseudo-MPEC" for 2007-004D = Themis-D = NORAD 30797

Created 2017 Dec 21 3:06:21 UT using Find_Orb

This object has been maneuvering during November-December 2017. I've posted TLEs based on the observations below. Those TLEs will, of course, become obsolete if the object maneuvers again. You can see the current status of the THEMIS constellation, including that of this object.

Astrometry:
     YX2674E  C2017 12 15.50760 12 33 50.40 +01 32 28.8          16.0 GU     703
     YX2674E  C2017 12 15.51243 12 34 34.34 +01 32 40.0          16.8 GU     703
     YX2674E  C2017 12 15.51726 12 35 18.12 +01 32 50.6          15.9 GU     703
     YX2674E  C2017 12 15.52209 12 36 02.25 +01 33 00.4          16.0 GU     703
     YX2674E  C2017 12 15.54537 12 39 37.76 +01 33 27.1          15.9 GU     703
     YX2674E  C2017 12 15.54549 12 39 38.85 +01 33 27.1          16.0 GU     703
     YX2674E  C2017 12 15.54560 12 39 39.92 +01 33 27.2          16.0 GU     703
     YX2674E  C2017 12 15.54572 12 39 40.99 +01 33 27.3          16.0 GU     703
     YX2674E  C2017 12 15.55223 12 40 42.51 +01 33 28.5          15.8 GU     703
     YX2674E  C2017 12 15.55234 12 40 44.36 +01 33 21.2          15.6 GU     I52
     YX2674E  C2017 12 15.55235 12 40 43.62 +01 33 28.6          15.9 GU     703
     YX2674E  C2017 12 15.55243 12 40 45.19 +01 33 21.1          15.5 GU     I52
     YX2674E  C2017 12 15.55246 12 40 44.71 +01 33 28.5          15.9 GU     703
     YX2674E  C2017 12 15.55252 12 40 46.06 +01 33 21.2          15.5 GU     I52
     YX2674E  C2017 12 15.55258 12 40 45.79 +01 33 28.6          15.9 GU     703
     YX2674E  C2017 12 15.55261 12 40 46.92 +01 33 21.3          15.7 GU     I52
     YX2674E  C2017 12 15.55270 12 40 46.91 +01 33 28.7          15.9 GU     703
     YX2674E  C2017 12 15.55279 12 40 48.71 +01 33 21.4          15.1 GU     I52
     YX2674E  C2017 12 15.55281 12 40 47.99 +01 33 28.5          15.9 GU     703
     YX2674E  C2017 12 15.55288 12 40 49.52 +01 33 21.5          15.1 GU     I52
     YX2674E  C2017 12 15.55292 12 40 49.07 +01 33 28.3          15.8 GU     703
     YX2674E  C2017 12 15.55298 12 40 50.44 +01 33 21.5          15.5 GU     I52
     YX2674E  C2017 12 15.55304 12 40 50.17 +01 33 28.7          15.8 GU     703
     YX2674E  C2017 12 15.55307 12 40 51.29 +01 33 21.5          15.4 GU     I52
     YX2674E  C2017 12 15.55348 12 40 55.15 +01 33 21.2          15.4 GU     I52
     YX2674E  C2017 12 15.55357 12 40 56.04 +01 33 21.1          15.6 GU     I52
     YX2674E  C2017 12 15.55366 12 40 56.88 +01 33 21.3          15.6 GU     I52
     YX2674E  C2017 12 15.55375 12 40 57.75 +01 33 21.2          15.7 GU     I52
     YYBA961  C2017 12 20.48969 11 29 34.12 +00 56 33.9          16.9 GUNEOCPG96
     YYBA961  C2017 12 20.48978 11 29 34.70 +00 56 35.1          17.0 GUNEOCPG96
     YYBA961  C2017 12 20.48987 11 29 35.24 +00 56 36.2          16.9 GUNEOCPG96
     YYBA961  C2017 12 20.48997 11 29 35.79 +00 56 37.4          17.0 GUNEOCPG96
     YYBA961  C2017 12 20.53112 11 33 35.57 +01 04 41.1          16.9 GUNEOCPG96
     YYBA961  C2017 12 20.53122 11 33 36.09 +01 04 42.0          16.9 GUNEOCPG96
     YYBA961  C2017 12 20.53131 11 33 36.62 +01 04 43.0          16.9 GUNEOCPG96
     YYBA961  C2017 12 20.53140 11 33 37.14 +01 04 44.0          17.0 GUNEOCPG96

Station data:
(703) Catalina Sky Survey  (N32.417003 W110.732640)  US/Arizona.  Observer E.
   J. Christensen. Measurers E. J. Christensen, D. C. Fuls, A. R. Gibbs, A.
   D. Grauer, J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, R.
   G. Matheny, R. L. Seaman, F. C. Shelly. 0.68-m Schmidt + 10K 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.
(I52) Steward Observatory, Mt. Lemmon Station  (N32.442544 W110.788920)
   US/Arizona.  Observer E. J. Christensen. Measurers E. J. Christensen, D.
   C. Fuls, A. R. Gibbs, A. D. Grauer, J. A. Johnson, R. A. Kowalski, S. M.
   Larson, G. J. Leonard, R. G. Matheny, R. L. Seaman, F. C. Shelly. 1.0-m
   reflector + CCD.

Orbital elements:  2007-004D = Themis-D = NORAD 30797
   Perigee 2017 Dec 19.907723 +/- 8.38e-5 TT = 21:47:07 (JD 2458107.407723)
Epoch 2017 Dec 20.0 TT = JDT 2458107.5                        Gray
M  24.95791 +/- 0.022               (J2000 equator)
n 270.46756701 +/- 0.00192          Peri.  223.85390 +/- 0.0038
a 51112.4513 +/- 0.243              Node   131.19272 +/- 0.00012
e   0.8424243 +/- 2.46e-5           Incl.    4.62263 +/- 0.0008
P1916.64m/1.331d           H 29.1   G  0.15   U  8.5
q 8054.07609 +/- 1.23    Q 94170.8265 +/- 1.62
From 36 observations 2017 Dec. 15-20; mean residual 0".511
Residuals in arcseconds: 
171215 703 .122- 2.11+    171215 703 .837+ .213-    171215 I52 .666- .323-
171215 703 1.44+ 1.22+    171215 I52 .178- .358-    171215 I52 .156- .416-
171215 703 1.15- .932+    171215 703 .046- .114-    171215 I52 .397- .209-
171215 703 .658- 1.09+    171215 I52 .097- .258-    171215 I52 .191- .301-
171215 703 .242+ .118+    171215 703 .333- .013-    171220 G96 .411- .079-
171215 703 .305- .061+    171215 I52 1.11+ .155-    171220 G96 .183+ .011-
171215 703 .252+ .110+    171215 703 .200+ .212-    171220 G96 .179+ .043-
171215 703 .601- .155+    171215 I52 .433+ .052-    171220 G96 .574- .101-
171215 703 .572+ .210-    171215 703 .731+ .410-    171220 G96 .536+ .070+
171215 I52 .045- .358-    171215 I52 .019- .049-    171220 G96 .218- .123-
171215 703 .145+ .112-    171215 703 .134+ 6.3m-    171220 G96 .033+ .107-
171215 I52 .410- .458-    171215 I52 .098- .046-    171220 G96 .135+ .090-

Ephemerides (geocentric):
Date (UTC) HH   RA              Dec         delta   r     elong  mag " sig PA
---- -- -- --  ------------   ------------  ------ ------ -----  --- ---- ---
2017 12 20 00  08 41 03.546   -00 04 29.11   36907 .98405 132.6 12.8 35.4  87
2017 12 20 01  09 17 15.952   +00 39 17.75   46973 .98406 125.2 13.6 17.1  88
2017 12 20 02  09 41 27.471   +01 08 04.03   55413 .98406 120.1 14.1  9.2  89
2017 12 20 03  09 59 38.285   +01 29 12.29   62610 .98406 116.2 14.4  5.1  91
2017 12 20 04  10 14 17.817   +01 45 50.65   68796 .98405 113.1 14.7  2.8  93
2017 12 20 05  10 26 41.285   +01 59 34.44   74122 .98404 110.4 15.0  1.4  99
2017 12 20 06  10 37 31.590   +02 11 17.88   78694 .98403 108.1 15.2  .53 114
2017 12 20 07  10 47 15.485   +02 21 34.53   82587 .98401 106.0 15.4  .21  13
2017 12 20 08  10 56 10.842   +02 30 46.53   85858 .98400 104.0 15.5  .39  62
2017 12 20 09  11 04 30.300   +02 39 09.21   88549 .98398 102.2 15.7  .48  72
2017 12 20 10  11 12 23.266   +02 46 53.67   90691 .98396 100.5 15.8  .45  77
2017 12 20 11  11 19 57.082   +02 54 08.25   92307 .98394  98.8 15.9  .31  80
2017 12 20 12  11 27 17.762   +03 00 59.42   93414 .98392  97.2 15.9  .08  90
2017 12 20 13  11 34 30.485   +03 07 32.37   94022 .98390  95.7 16.0  .24  77
2017 12 20 14  11 41 39.954   +03 13 51.40   94138 .98388  94.1 16.1  .66  80
2017 12 20 15  11 48 50.684   +03 20 00.20   93762 .98386  92.6 16.1  1.2  81
2017 12 20 16  11 56 07.260   +03 26 02.03   92892 .98384  91.0 16.2  1.8  82
2017 12 20 17  12 03 34.609   +03 31 59.92   91518 .98382  89.4 16.2  2.5  83
2017 12 20 18  12 11 18.320   +03 37 56.72   89626 .98380  87.7 16.2  3.4  83
2017 12 20 19  12 19 25.067   +03 43 55.29   87198 .98378  85.9 16.3  4.5  84
2017 12 20 20  12 28 03.212   +03 49 58.52   84204 .98376  84.0 16.3  5.8  84
2017 12 20 21  12 37 23.752   +03 56 09.43   80610 .98374  82.0 16.3  7.4  85
2017 12 20 22  12 47 41.865   +04 02 31.16   76365 .98372  79.7 16.3  9.5  85
2017 12 20 23  12 59 19.656   +04 09 06.78   71405 .98371  77.2 16.2 12.3  86
2017 12 21 00  13 12 51.386   +04 15 58.59   65639 .98369  74.2 16.2 16.2  86
2017 12 21 01  13 29 14.479   +04 23 05.71   58940 .98368  70.7 16.2 22.0  87
2017 12 21 02  13 50 15.875   +04 30 15.66   51119 .98366  66.1 16.2 31.4  88
2017 12 21 03  14 19 48.089   +04 36 29.48   41878 .98366  59.8 16?? 49.3  89
2017 12 21 04  15 08 45.486   +04 36 44.41   30699 .98366  49.6 16?? 94.7  90
2017 12 21 05  17 09 56.046   +03 44 43.61   16691 .98370  29.5 17??  319  93
2017 12 21 06  03 42 09.966   -04 29 31.24   10460 .98384 136.9 10.0  757  89
2017 12 21 07  07 39 14.651   -01 18 40.66   25396 .98393 145.0 11.7  111  86
2017 12 21 08  08 44 28.567   -00 00 24.80   37604 .98396 133.2 12.8 42.4  86
2017 12 21 09  09 19 33.927   +00 42 07.03   47553 .98397 126.0 13.6 21.9  87
2017 12 21 10  09 43 14.350   +01 10 18.72   55906 .98397 121.1 14.1 12.8  88
2017 12 21 11  10 01 07.639   +01 31 07.96   63035 .98397 117.3 14.4  8.0  89
2017 12 21 12  10 15 36.093   +01 47 34.68   69163 .98396 114.1 14.7  5.2  90
2017 12 21 13  10 27 52.018   +02 01 10.79   74440 .98395 111.5 15.0  3.5  91
2017 12 21 14  10 38 36.919   +02 12 48.92   78967 .98394 109.2 15.2  2.4  92
2017 12 21 15  10 48 16.806   +02 23 01.78   82821 .98393 107.1 15.3  1.7  93
2017 12 21 16  10 57 09.120   +02 32 10.98   86055 .98391 105.2 15.5  1.3  93
2017 12 21 17  11 05 26.238   +02 40 31.59   88710 .98390 103.4 15.6  1.1  92
2017 12 21 18  11 13 17.399   +02 48 14.50   90819 .98388 101.6 15.7  1.0  90
2017 12 21 19  11 20 49.835   +02 55 27.92   92403 .98386 100.0 15.8  1.1  88
2017 12 21 20  11 28 09.488   +03 02 18.25   93479 .98384  98.4 15.9  1.3  86
2017 12 21 21  11 35 21.494   +03 08 50.62   94057 .98382  96.9 16.0  1.6  85
2017 12 21 22  11 42 30.530   +03 15 09.28   94142 .98380  95.3 16.0  2.0  84
2017 12 21 23  11 49 41.101   +03 21 17.89   93737 .98378  93.7 16.1  2.6  84
2017 12 22 00  11 56 57.801   +03 27 19.71   92836 .98376  92.1 16.1  3.2  84
2017 12 22 01  12 04 25.580   +03 33 17.74   91430 .98374  90.5 16.2  4.0  84