"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