"Pseudo-MPEC" for ZTF01ZJ

Created 2018 Oct 28 0:27:25 UT using Find_Orb

Click here for an explanation of pseudo-MPECs

This is quite likely to be another ETBO (Empty Trash Bag Object), a very small artsat (H=33.4 makes it around a meter across) light enough to be strongly affected by solar radiation pressure. ZTF found several similar objects at about the same time, such as ZTF00Y9 = ZTF00Yp = ZTF00ah and ZTF00hf = ZTF00YB. This one was only tracked for 2.7 hours; that's enough to get a very solid orbit, convincingly geocentric, but is nowhere near what we'd need to determine its area/mass ratio. Unless somebody accidentally recovers it, we won't know; it is currently "lost".

 
 Astrometry: 
     ZTF01ZJ  C2018 10 06.29562801 00 30.33 +23 15 05.8                UNEOCPI41
     ZTF01ZJ  C2018 10 06.29597501 00 34.19 +23 15 47.1                UNEOCPI41
     ZTF01ZJ  C2018 10 06.35967001 12 47.82 +25 16 04.7          17.99gUNEOCPI41
     ZTF01ZJ  C2018 10 06.36001601 12 51.75 +25 16 39.8          17.99gUNEOCPI41
     ZTF01ZJ  C2018 10 06.40613401 22 27.24 +26 31 49.1          17.24RUNEOCPI41
     ZTF01ZJ  C2018 10 06.40648101 22 31.68 +26 32 20.3          17.24RUNEOCPI41

Station data:
(I41) Palomar Mountain--ZTF  (N33.357340 W116.859780)  US/California. 1.2-m
   f/2.44 Oschin Schmidt + CCD.

Orbital elements:  ZTF01ZJ
   Perigee 2018 Oct 5.776032 +/- 0.00152 TT = 18:37:29 (JD 2458397.276032)
Epoch 2018 Oct  6.0 TT = JDT 2458397.5                        Gray
M  77.286607736 +/- 0.38            (J2000 equator)
n 345.079347982 +/- 0.746           Peri.  226.822225 +/- 0.06
a 43450.10800 +/- 62.6              Node   332.964819 +/- 0.028
e   0.76722633 +/- 0.000618         Incl.   34.096999 +/- 0.00057
P1502.23m/1.043d           H 33.4   G  0.15   U 12.5
q 10114.04075 +/- 41.3    Q 76786.17525 +/- 84.4
From 6 observations 2018 Oct. 6 (2.7 hr); mean residual 0".742
Residuals in arcseconds: 
181006 I41 .453+ .621+    181006 I41 1.31+ .470+    181006 I41 .838+ .271+
181006 I41 .457- .627-    181006 I41 1.32- .469-    181006 I41 .826- .268-

Ephemerides (geocentric):
Date (UTC) HH   RA              Dec         delta   r     elong  mag " sig PA
---- -- -- --  -------------   -----------  ------ ------ -----  --- ---- ---
2018 10 06 00  23 24 37.215   +11 56 00.13   58482 1.0003 158.8 17.4 95.1  67
2018 10 06 01  23 40 57.077   +14 23 28.69   63529 1.0003 161.4 17.4 57.0  72
2018 10 06 02  23 55 21.691   +16 27 35.13   67652 1.0003 163.1 17.5 35.1  79
2018 10 06 03  00 08 31.672   +18 15 33.88   70943 1.0003 163.8 17.6 22.2  87
2018 10 06 04  00 20 53.639   +19 51 58.58   73465 1.0003 163.9 17.7 14.5  96
2018 10 06 05  00 32 46.762   +21 19 52.85   75262 1.0003 163.3 17.8 9.71 107
2018 10 06 06  00 44 26.189   +22 41 26.41   76362 1.0003 162.3 17.8 6.56 119
2018 10 06 07  00 56 05.094   +23 58 15.06   76782 1.0003 160.9 17.9 4.20 136
2018 10 06 08  01 07 56.108   +25 11 32.25   76530 1.0003 159.2 17.9 2.78 179
2018 10 06 09  01 20 12.562   +26 22 15.90   75601 1.0003 157.3 18.0 4.43  53
2018 10 06 10  01 33 09.826   +27 31 12.25   73980 1.0002 155.0 18.0 9.27  71
2018 10 06 11  01 47 07.090   +28 38 57.09   71643 1.0002 152.5 18.0 17.4  77
2018 10 06 12  02 02 30.087   +29 45 53.80   68549 1.0002 149.7 18.0 30.6  79
2018 10 06 13  02 19 55.747   +30 52 05.28   64640 1.0001 146.4 17.9 52.2  81
2018 10 06 14  02 40 20.908   +31 56 51.76   59833 1.0001 142.4 17.9 88.6  82
2018 10 06 15  03 05 20.294   +32 57 49.55   54010 1.0000 137.6 17.8  153  85
2018 10 06 16  03 37 48.218   +33 47 43.94   46994 0.9999 131.4 17.7  278  88
2018 10 06 17  04 23 51.615   +34 03 04.83   38515 0.9998 122.5 17.5  555  93
2018 10 06 18  05 39 12.480   +32 07 58.33   28155 0.9997 107.4 17.3 1376 103
2018 10 06 19  08 20 04.242   +17 34 59.35   15659 0.9996  70.0 17.6 5854 120
2018 10 06 20  17 00 18.784   -33 28 52.09   12235 0.9996  64.6 17.4 194'  83
2018 10 06 21  20 58 24.947   -11 59 12.59   24771 0.9997 120.2 16.6 3405  57
2018 10 06 22  22 03 45.543   -01 19 03.68   35765 0.9998 138.2 16.9 1850  55
2018 10 06 23  22 39 35.812   +04 43 21.88   44733 0.9999 147.7 17.1 1290  55
2018 10 07 00  23 04 33.487   +08 49 06.36   52135 0.9999 153.8 17.3 1012  56
2018 10 07 01  23 24 06.271   +11 53 50.70   58280 1.0000 157.9 17.4  849  57
2018 10 07 02  23 40 31.531   +14 22 09.10   63364 1.0000 160.7 17.5  743  58
2018 10 07 03  23 54 59.656   +16 26 45.53   67521 1.0000 162.6 17.5  670  59
2018 10 07 04  00 08 11.967   +18 15 02.26   70843 1.0000 163.6 17.6  620  60
2018 10 07 05  00 20 35.446   +19 51 37.09   73393 1.0000 163.8 17.7  584  61
2018 10 07 06  00 32 29.457   +21 19 35.95   75216 1.0000 163.5 17.7  561  62
2018 10 07 07  00 44 09.251   +22 41 09.99   76343 1.0000 162.7 17.8  548  63
2018 10 07 08  00 55 48.041   +23 57 55.82   76789 1.0000 161.4 17.9  544  65
2018 10 07 09  01 07 38.447   +25 11 07.39   76563 1.0000 159.8 17.9  550  66
2018 10 07 10  01 19 53.741   +26 21 42.89   75660 1.0000 158.0 17.9  567  67
2018 10 07 11  01 32 49.176   +27 30 28.73   74066 0.9999 155.8 18.0  596  69
2018 10 07 12  01 46 43.736   +28 38 00.80   71757 0.9999 153.4 18.0  643  71
2018 10 07 13  02 02 02.808   +29 44 42.63   68693 0.9999 150.6 17.9  714  73
2018 10 07 14  02 19 22.724   +30 50 37.65   64817 0.9998 147.3 17.9  820  75
2018 10 07 15  02 39 39.233   +31 55 07.72   60047 0.9998 143.5 17.9  984  78
2018 10 07 16  03 04 24.910   +32 55 54.21   54266 0.9997 138.8 17.8 1252  81
2018 10 07 17  03 36 29.337   +33 45 59.19   47300 0.9996 132.6 17.6 1727  86
2018 10 07 18  04 21 47.217   +34 02 57.76   38885 0.9996 123.9 17.5 2711  92
2018 10 07 19  05 35 20.483   +32 16 40.01   28606 0.9995 109.2 17.2 5400 102
2018 10 07 20  08 10 05.562   +18 51 42.72   16162 0.9994  73.7 17.5 313' 119
2018 10 07 21  16 38 20.054   -33 53 10.41   11833 0.9993  59.2 17?? 557'  86
2018 10 07 22  20 54 44.561   -12 29 35.17   24297 0.9994 118.2 16.6 8672  58
2018 10 07 23  22 02 09.745   -01 31 51.87   35382 0.9995 136.8 16.9 4367  56
2018 10 08 00  22 38 37.411   +04 36 47.89   44421 0.9996 146.5 17.1 2898  56
2018 10 08 01  23 03 52.094   +08 45 23.83   51879 0.9996 152.7 17.3 2195  56
2018 10 08 02  23 23 34.304   +11 51 39.44   58068 0.9997 157.0 17.4 1795  57
2018 10 08 03  23 40 05.392   +14 20 50.68   63191 0.9997 160.0 17.5 1543  58
2018 10 08 04  23 54 37.344   +16 25 58.93   67383 0.9997 162.0 17.6 1375  59
2018 10 08 05  00 07 52.235   +18 14 34.79   70736 0.9997 163.2 17.6 1260  60
2018 10 08 06  00 20 17.435   +19 51 20.48   73315 0.9997 163.7 17.7 1181  61
2018 10 08 07  00 32 12.520   +21 19 24.41   75166 0.9997 163.6 17.7 1129  62
2018 10 08 08  00 43 52.850   +22 40 59.19   76320 0.9997 162.9 17.8 1099  64
2018 10 08 09  00 55 31.684   +23 57 42.31   76793 0.9997 161.9 17.8 1089  65
2018 10 08 10  01 07 21.638   +25 10 48.22   76592 0.9997 160.4 17.9 1098  66
2018 10 08 11  01 19 35.931   +26 21 15.44   75716 0.9997 158.7 17.9 1128  67