"Pseudo-MPEC" for 1964-040B = NORAD 00837 = Vela 2B

Created 2018 Sep 18 13:57:09 UT using Find_Orb

Click here for an explanation of pseudo-MPECs

TLEs are available for this and other objects on these pages.

This object was first found by the Zwicky Transient Facility on 2018 August 30, designated as ZTF00XY, with four observations over 73 minutes. It was enough to make me suspect it might be an artsat, but not enough to prove it, much less say anything about its orbit.

On 2018 September 18, the Catalina Sky Survey found an object that appeared to be a likely artsat. Follow-up confirmed this, and Marco Micheli linked the new data back to the ZTF observations.

I (Bill Gray) then tried to identify the object. There are not many objects in orbits with a period of 6000 minutes. Running the orbit back to the launch date of 1964-040B = Vela 2B on 1964 July 17 got an inclination of 40.9 degrees and perigee height above ground 95518 km. (Here's a graph of inclination and perigee height from launch in 1964 to a bit into the future.) The catalogued initial inclination is 40.7 degrees, perigee 94374 km, orbital period 6002.73 minutes. I'm calling it a match.

 
 Astrometry: 
     ZTF00XY  C2018 08 30-cAstrometry2Y$qe3dxaPtsE!_2fo'Q[KT`icSrJp^]O/IOBg']I41
     ZTF00XY  C2018 08 30q!1pVp(C?0NT5):$FHPqhTGwWvtD#1oYBe5mHXf2aAGj5%j]/aVQI41
     ZTF00XY  C2018 08 30#(MTr14Aj0-#U8jAy1hCFG4^VO:aEqisKFk]42'DsaH(8IS#kQ#8I41
     ZTF00XY  C2018 08 30?aHnU/:My3REXiYDqredacted;WX%2qJ@NoqR.6mV*#@x*s1\iLQI41
     ZS09798  C2018 09 18.18549 21 58 48.21 +22 24 04.8          16.9 GVNEOCP703
     ZS09798  C2018 09 18.19079 21 58 59.85 +22 22 31.7          16.8 GVNEOCP703
     ZS09798  C2018 09 18.19610 21 59 11.40 +22 20 55.0          17.0 GVNEOCP703
     ZS09798  C2018 09 18.29370 22 02 44.93 +21 42 26.1          17.5 GVNEOCPI52
     ZS09798  C2018 09 18.29383 22 02 45.22 +21 42 22.6          17.4 GVNEOCPI52
     ZS09798  C2018 09 18.29396 22 02 45.51 +21 42 18.8          17.5 GVNEOCPI52
     ZS09798  C2018 09 18.29408 22 02 45.81 +21 42 14.9          17.5 GVNEOCPI52
     ZS09798 KC2018 09 18hw.,/h`B_db4Z3@h#gx-jr,tkq1/;]:)ZIii7OeP:'tn8qn%Jgey850
     ZS09798 KC2018 09 18X\0BQG\Z[_I$PyD'mKEg@^]kQpB5AwL+?#RU^g;alk`6rS;rt50W850
     ZS09798 KC2018 09 18'(/QJ'Al$mQwJ^SbKHJq90af#8llHJMP3%:FsmxJq\WZa%*Ysn@_850
     ZS09798 KC2018 09 18fwwYDy]q)pP)dP*7w\bor?OYyYlr'gWnseed.Mba0ZjZdsx;W689850
     ZS09798 KC2018 09 18Ra1K6EJI7BQ$SyC;L+6?lJ*@yw87kDSVpi!@mm=xqpw:fIh9?[cI850
     ZS09798 KC2018 09 18U?RXnwVGTLj/G]d[N4XB[BCtbX7e3Wh?i\=y]KLMZM177Fe%%-Z:850
     ZS09798 KC2018 09 18*#il5Z1HkSg4i*4L/`Tj3e[$eF]D-=_7tN]/bI1TyhF]Lm7NEOCP850

Station data:
(703) Catalina Sky Survey  (N32.417006 W110.732640)  US/Arizona.  Observer G.
   J. Leonard. Measurers B. M. Africano, E. J. Christensen, G. A. Farneth, D.
   C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, J. A. Johnson, R. A.
   Kowalski, S. M. Larson, G. J. Leonard, R. L. Seaman, F. C. Shelly. 0.68-m
   Schmidt + 10K CCD.
(850) Cordell-Lorenz Observatory, Sewanee  (N35.204094 W85.919800)
   US/Tennessee. 0.3-m Schmidt-Cassegrain.
(I41) Palomar Mountain--ZTF  (N33.357340 W116.859780)  US/California. 1.2-m
   f/2.44 Oschin Schmidt + CCD.
(I52) Steward Observatory, Mt. Lemmon Station  (N32.442547 W110.788920)
   US/Arizona.  Observers B. M. Africano, E. J. Christensen, D. C. Fuls, A.
   R. Gibbs, A. D. Grauer, H. Groeller, J. A. Johnson, R. A. Kowalski, S. M.
   Larson, G. J. Leonard, R. L. Seaman, F. C. Shelly. 1.0-m reflector + CCD.

Orbital elements:  1964-040B = NORAD 00837 = Vela 2B
   Perigee 2018 Sep 19.701160 +/- 0.000508 TT = 16:49:40 (JD 2458381.201160)
Epoch 2018 Sep 18.0 TT = JDT 2458379.5                        Gray
M 212.9972031 +/- 0.040             (J2000 equator)
n  86.4132437703 +/- 0.00225        Peri.  295.2740129 +/- 0.007
a109366.24491 +/- 1.9               Node   200.2629581 +/- 0.00014
e   0.777453798 +/- 6.23e-5         Incl.   28.3427956 +/- 0.00015
P5998.97m/4.166d           H 30.9   G  0.15   U  8.6
q 24339.042358 +/- 7.22    Q 194393.44747 +/- 3.62
From 18 observations 2018 Aug. 30-Sept. 18; mean residual 1".221
Residuals in arcseconds: 
180830 I41 3.33- 1.51-    180918 703 .420- .375+    180918 850 .857- .462+
180830 I41 2.80- .119-    180918 I52 .489+ .255-    180918 850 1.63+ 1.01-
180830 I41 2.12+ .289+    180918 I52 .249+ .017-    180918 850 1.01+ .262+
180830 I41 3.41+ .745+    180918 I52 6.8m+ .078-    180918 850 .566+ .125+
180918 703 .122- .181+    180918 I52 .232+ .525-    180918 850 2.28- .535+
180918 703 .207- .541+    180918 850 .712+ 1.32-    180918 850 .732- 8.3m+

Ephemerides (geocentric):
Date (UTC) HH   RA              Dec         delta  elong  mag " sig PA
---- -- -- --  -------------   -----------  ------ -----  --- ---- ---
2018 09 18 14  22 30 58.683   +20 01 09.94  164505 151.9 17.4 2.62 107
2018 09 18 15  22 35 01.706   +19 39 34.28  161729 152.8 17.3 3.32 108
2018 09 18 16  22 39 12.287   +19 16 50.55  158808 153.7 17.3 4.14 109
2018 09 18 17  22 43 31.268   +18 52 51.71  155738 154.6 17.2 5.10 110
2018 09 18 18  22 47 59.611   +18 27 29.64  152514 155.6 17.1 6.23 111
2018 09 18 19  22 52 38.418   +18 00 34.95  149131 156.6 17.1 7.55 111
2018 09 18 20  22 57 28.960   +17 31 56.64  145584 157.6 17.0 9.09 112
2018 09 18 21  23 02 32.721   +17 01 21.82  141864 158.6 16.9 10.9 112
2018 09 18 22  23 07 51.440   +16 28 35.19  137967 159.7 16.8 13.0 113
2018 09 18 23  23 13 27.178   +15 53 18.52  133883 160.8 16.7 15.5 114
2018 09 19 00  23 19 22.405   +15 15 09.82  129604 162.0 16.6 18.5 114
2018 09 19 01  23 25 40.106   +14 33 42.30  125120 163.1 16.5 22.0 114
2018 09 19 02  23 32 23.943   +13 48 23.01  120420 164.2 16.3 26.3 115
2018 09 19 03  23 39 38.464   +12 58 30.82  115492 165.3 16.2 31.4 115
2018 09 19 04  23 47 29.412   +12 03 13.72  110321 166.3 16.1 37.7 116
2018 09 19 05  23 56 04.170   +11 01 24.88  104893 167.1 15.9 45.5 116
2018 09 19 06  00 05 32.429   +09 51 36.81   99188 167.5 15.8 55.4 117
2018 09 19 07  00 16 07.223   +08 31 52.66   93187 167.3 15.7 68.0 117
2018 09 19 08  00 28 06.599   +06 59 32.64   86868 166.4 15.6 84.6 118
2018 09 19 09  00 41 56.424   +05 10 52.39   80205 164.4 15.5  107 118
2018 09 19 10  00 58 15.380   +03 00 27.36   73172 161.4 15.4  138 118
2018 09 19 11  01 18 04.429   +00 20 12.84   65747 156.9 15.3  183 118
2018 09 19 12  01 43 06.233   -03 02 17.12   57915 150.8 15.2  252 118
2018 09 19 13  02 16 28.912   -07 26 24.28   49702 142.1 15.1  364 118
2018 09 19 14  03 04 35.282   -13 20 05.64   41243 129.6 15.0  561 115
2018 09 19 15  04 21 49.507   -21 01 31.49   33006 110.3 15.1  925 110
2018 09 19 16  06 37 46.624   -27 58 46.55   26418  79.5 15.8 1519  95
2018 09 19 17  09 51 30.236   -23 09 07.74   24479  37.3 19?? 1853  73
2018 09 19 18  12 24 37.669   -07 26 51.03   28628  12.9 26?? 1406  63
2018 09 19 19  13 58 04.508   +05 01 45.09   36133  32.8 20??  907  62
2018 09 19 20  14 58 54.743   +12 40 18.45   44554  48.7 19??  608  64
2018 09 19 21  15 42 15.279   +17 23 33.86   52947  59.8 18??  437  67
2018 09 19 22  16 15 13.247   +20 27 47.25   61019  67.9 18.3  332  70
2018 09 19 23  16 41 29.071   +22 33 31.76   68693  74.2 18.2  263  72
2018 09 20 00  17 03 07.953   +24 02 43.33   75963  79.2 18.1  216  74
2018 09 20 01  17 21 26.654   +25 07 52.71   82849  83.4 18.1  182  76
2018 09 20 02  17 37 15.120   +25 56 32.05   89374  87.0 18.1  156  78
2018 09 20 03  17 51 07.417   +26 33 27.02   95566  90.0 18.2  135  79
2018 09 20 04  18 03 27.678   +27 01 45.68  101449  92.7 18.2  119  81
2018 09 20 05  18 14 33.546   +27 23 36.16  107043  95.2 18.2  106  82
2018 09 20 06  18 24 38.258   +27 40 28.43  112368  97.3 18.2 95.4  83
2018 09 20 07  18 33 51.972   +27 53 27.29  117442  99.3 18.2 86.3  84
2018 09 20 08  18 42 22.632   +28 03 20.43  122278 101.1 18.3 78.5  85
2018 09 20 09  18 50 16.554   +28 10 43.64  126891 102.8 18.3 71.8  86
2018 09 20 10  18 57 38.837   +28 16 04.22  131293 104.4 18.3 66.0  87
2018 09 20 11  19 04 33.646   +28 19 43.33  135494 105.9 18.3 60.8  88
2018 09 20 12  19 11 04.427   +28 21 57.55  139503 107.2 18.3 56.3  88
2018 09 20 13  19 17 14.058   +28 23 00.04  143328 108.5 18.4 52.3  89
2018 09 20 14  19 23 04.969   +28 23 01.34  146978 109.8 18.4 48.6  90
2018 09 20 15  19 28 39.225   +28 22 10.00  150459 110.9 18.4 45.4  91
2018 09 20 16  19 33 58.596   +28 20 32.96  153778 112.1 18.4 42.4  91
2018 09 20 17  19 39 04.613   +28 18 15.95  156939 113.1 18.4 39.7  92
2018 09 20 18  19 43 58.606   +28 15 23.67  159949 114.2 18.4 37.2  92
2018 09 20 19  19 48 41.738   +28 12 00.05  162811 115.2 18.4 35.0  93
2018 09 20 20  19 53 15.033   +28 08 08.35  165530 116.1 18.4 32.9  93
2018 09 20 21  19 57 39.398   +28 03 51.31  168109 117.0 18.4 30.9  94
2018 09 20 22  20 01 55.638   +27 59 11.21  170553 117.9 18.4 29.2  94
2018 09 20 23  20 06 04.475   +27 54 09.98  172864 118.8 18.4 27.5  95
2018 09 21 00  20 10 06.556   +27 48 49.25  175046 119.7 18.5 26.0  95
2018 09 21 01  20 14 02.467   +27 43 10.37  177101 120.5 18.5 24.5  96