"Pseudo-MPEC" for ZLAF9B2

Created 2018 Jun 3 16:04:49 UT using Find_Orb

Click here for an explanation of pseudo-MPECs

 
 Astrometry: 
     ZLAF9B2  C2018 06 02.34330 16 11 10.34 -11 19 34.7                      G96
     ZLAF9B2  C2018 06 02.34851 16 10 59.30 -11 20 21.6          18.2 G      G96
     ZLAF9B2  C2018 06 02.35373 16 10 48.15 -11 21 08.9          18.3 G      G96
     ZLAF9B2  C2018 06 02.35895 16 10 36.57 -11 21 57.6          18.0 G      G96
     ZLAF9B2  C2018 06 02.39785 16 09 02.60 -11 28 26.0          17.5 GUNEOCPI52
     ZLAF9B2  C2018 06 02.39804 16 09 02.13 -11 28 28.1          17.2 GUNEOCPI52
     ZLAF9B2  C2018 06 02.39822 16 09 01.62 -11 28 30.1          17.5 GUNEOCPI52
     ZLAF9B2  C2018 06 02.39840 16 09 01.15 -11 28 31.8          17.7 GUNEOCPI52
     ZLAF9B2  C2018 06 02.40223 16 08 51.04 -11 29 13.6          17.7 GUNEOCPG96
     ZLAF9B2  C2018 06 02.40233 16 08 50.78 -11 29 15.1          17.9 GUNEOCPG96
     ZLAF9B2  C2018 06 02.40242 16 08 50.58 -11 29 16.1          17.8 GUNEOCPG96
     ZLAF9B2  C2018 06 02.40251 16 08 50.28 -11 29 16.8          17.8 GUNEOCPG96
     ZLAF9B2  C2018 06 02.49263 16 06 03.77 -11 44 01.9          17.5 oU     T08
     ZLAF9B2  C2018 06 02.50096 16 05 20.09 -11 46 56.2          17.3 oU     T08

Station data:
(G96) Mt. Lemmon Survey  (N32.442754 W110.788720)  US/Arizona.  Observers B.
   M. Africano, 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. L. Seaman, F.
   C. Shelly. 1.5-m reflector + 10K 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, J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J.
   Leonard, R. L. Seaman, F. C. Shelly. 1.0-m reflector + CCD.
(T08) ATLAS-MLO, Mauna Loa  (N19.535772 W155.576400)  US/Hawaii.  Observers
   L. Denneau, A. Heinze, H. Weiland, J. Tonry. Measurers L. Denneau, H.
   Flewelling, A. Heinze, B. Stalder, J. Tonry. 0.5-m f/2.0 Schmidt + CCD.

Orbital elements:  ZLAF9B2
   Perigee 2018 Jun 2.702886 +/- 0.00134 TT = 16:52:09 (JD 2458272.202886)
Epoch 2018 Jun  2.0 TT = JDT 2458271.5                        Gray
q  5831.08762 +/- 102               (J2000 equator)
H   30.6  G 0.15                    Peri.  316.96478 +/- 0.17
                                    Node    91.33928 +/- 0.058
e   3.2221542 +/- 0.0352            Incl.  158.25700 +/- 0.07
From 14 observations 2018 June 2 (3.8 hr); mean residual 0".491
IMPACT at 2 Jun 2018 16:48:06.08 lat -20.64715 lon E17.45410
Residuals in arcseconds: 
180602 G96 .076- .201+    180602 I52 .380+ .017-    180602 G96 .512+ .161-
180602 G96 .652- .207-    180602 I52 .195- .069-    180602 G96 .374- .132+
180602 G96 1.02+ .160-    180602 I52 .177- .181+    180602 T08 .498- 1.71-
180602 G96 .019- .706-    180602 G96 .161- .244+    180602 T08 .792+ .230+
180602 I52 .013- .029+    180602 G96 .071- .154-

Ephemerides for (ZLA) ZLAF9B2 impact point: ZLAF9B2:
(delta = distance to the object in km;  elong = elongation from sun;  SM = sun/moon
indicator - here,  it just says the ephems start in civil twilight and the sky darkens
to nautical twilight at the end;  alt/az = altitude/azimuth above the horizon - the
object comes in low from a little bit south of due east;  rvel = radial velocity - the
object came in at about 16.6 km/s;  and then you get the track of the object relative
to the ground as latitude,  longitude,  altitude)

Date (UTC) HH:MM:SS   RA              Dec         delta  elong SM  mag  '/hr    PA   alt  az  rvel   lon      lat      alt (km)
---- -- -- --------  -------------   -----------  ------ ----- --  --- ------ ------ --- ---  ----- -------- -------- ----------
2018 06 02 16:40:00  15 53 06.451   -12 09 36.04    7954 164.7 C  10.1   1166 249.3  +13 099 -15.34  63.2947 -20.4662   4843.659
2018 06 02 16:40:10  15 52 53.981   -12 10 45.50    7800 164.7 C  10.0   1185 249.2  +13 099 -15.36  62.7721 -20.5334   4723.375
2018 06 02 16:40:20  15 52 41.320   -12 11 56.16    7647 164.7 C  10.0   1203 249.2  +13 098 -15.39  62.2386 -20.6007   4603.483
2018 06 02 16:40:30  15 52 28.464   -12 13 08.04    7493 164.7 C   9.9   1222 249.2  +13 098 -15.42  61.6938 -20.6681   4484.001
2018 06 02 16:40:40  15 52 15.412   -12 14 21.18    7338 164.6 C   9.9   1240 249.1  +13 098 -15.44  61.1374 -20.7355   4364.946
2018 06 02 16:40:50  15 52 02.163   -12 15 35.61    7184 164.6 C   9.9   1259 249.1  +13 098 -15.47  60.5691 -20.8028   4246.336
2018 06 02 16:41:00  15 51 48.715   -12 16 51.36    7029 164.6 C   9.8   1279 249.0  +13 098 -15.50  59.9883 -20.8699   4128.190
2018 06 02 16:41:10  15 51 35.066   -12 18 08.45    6874 164.6 C   9.8   1298 249.0  +13 098 -15.53  59.3949 -20.9368   4010.527
2018 06 02 16:41:20  15 51 21.218   -12 19 26.92    6718 164.5 C   9.7   1317 248.9  +13 098 -15.56  58.7883 -21.0034   3893.369
2018 06 02 16:41:30  15 51 07.169   -12 20 46.79    6562 164.5 C   9.7   1337 248.8  +13 098 -15.59  58.1683 -21.0697   3776.737
2018 06 02 16:41:40  15 50 52.920   -12 22 08.11    6406 164.5 C   9.6   1356 248.7  +13 098 -15.62  57.5343 -21.1354   3660.654
2018 06 02 16:41:50  15 50 38.473   -12 23 30.90    6250 164.4 C   9.6   1376 248.7  +14 098 -15.65  56.8860 -21.2005   3545.145
2018 06 02 16:42:00  15 50 23.830   -12 24 55.20    6093 164.4 C   9.5   1395 248.6  +14 098 -15.68  56.2228 -21.2649   3430.233
2018 06 02 16:42:10  15 50 08.993   -12 26 21.04    5937 164.4 C   9.5   1414 248.5  +14 098 -15.71  55.5445 -21.3285   3315.945
2018 06 02 16:42:20  15 49 53.966   -12 27 48.46    5779 164.3 C   9.4   1433 248.3  +14 098 -15.74  54.8504 -21.3911   3202.309
2018 06 02 16:42:30  15 49 38.757   -12 29 17.49    5622 164.3 C   9.3   1451 248.2  +14 098 -15.78  54.1402 -21.4526   3089.352
2018 06 02 16:42:40  15 49 23.370   -12 30 48.16    5464 164.3 C   9.3   1469 248.1  +14 098 -15.81  53.4133 -21.5128   2977.105
2018 06 02 16:42:50  15 49 07.815   -12 32 20.51    5305 164.2 C   9.2   1486 247.9  +14 098 -15.84  52.6692 -21.5715   2865.600
2018 06 02 16:43:00  15 48 52.104   -12 33 54.58    5147 164.2 C   9.1   1502 247.7  +14 098 -15.88  51.9075 -21.6287   2754.868
2018 06 02 16:43:10  15 48 36.250   -12 35 30.39    4988 164.2 C   9.1   1517 247.5  +14 098 -15.91  51.1277 -21.6840   2644.944
2018 06 02 16:43:20  15 48 20.268   -12 37 08.00    4829 164.1 C   9.0   1531 247.3  +15 098 -15.95  50.3291 -21.7372   2535.865
2018 06 02 16:43:30  15 48 04.181   -12 38 47.42    4669 164.1 C   8.9   1543 247.1  +15 098 -15.98  49.5113 -21.7882   2427.667
2018 06 02 16:43:40  15 47 48.011   -12 40 28.69    4509 164.1 C   8.9   1552 246.8  +15 098 -16.02  48.6737 -21.8367   2320.389
2018 06 02 16:43:50  15 47 31.788   -12 42 11.85    4349 164.0 C   8.8   1560 246.4  +15 098 -16.05  47.8159 -21.8825   2214.073
2018 06 02 16:44:00  15 47 15.550   -12 43 56.93    4188 164.0 C   8.7   1564 246.0  +15 098 -16.09  46.9371 -21.9252   2108.762
2018 06 02 16:44:10  15 46 59.338   -12 45 43.95    4027 164.0 C   8.6   1565 245.6  +15 098 -16.13  46.0370 -21.9645   2004.499
2018 06 02 16:44:20  15 46 43.205   -12 47 32.95    3865 163.9 C   8.5   1561 245.0  +15 098 -16.17  45.1149 -22.0002   1901.332
2018 06 02 16:44:30  15 46 27.217   -12 49 23.95    3703 163.9 C   8.4   1552 244.4  +15 098 -16.21  44.1702 -22.0319   1799.310
2018 06 02 16:44:40  15 46 11.449   -12 51 16.98    3541 163.9 C   8.3   1536 243.6  +15 098 -16.24  43.2026 -22.0592   1698.483
2018 06 02 16:44:50  15 45 56.000   -12 53 12.03    3378 163.9 C   8.2   1513 242.6  +16 098 -16.28  42.2113 -22.0818   1598.904
2018 06 02 16:45:00  15 45 40.985   -12 55 09.14    3215 163.8 N   8.1   1480 241.4  +16 098 -16.32  41.1959 -22.0993   1500.628
2018 06 02 16:45:10  15 45 26.551   -12 57 08.30    3052 163.8 N   8.0   1435 239.9  +16 098 -16.36  40.1559 -22.1112   1403.713
2018 06 02 16:45:20  15 45 12.882   -12 59 09.49    2888 163.8 N   7.9   1376 237.9  +16 098 -16.40  39.0909 -22.1170   1308.218
2018 06 02 16:45:30  15 45 00.206   -13 01 12.71    2724 163.7 N   7.8   1300 235.1  +16 098 -16.44  38.0002 -22.1164   1214.205
2018 06 02 16:45:40  15 44 48.819   -13 03 17.90    2559 163.7 N   7.6   1205 231.2  +16 098 -16.48  36.8835 -22.1088   1121.739
2018 06 02 16:45:50  15 44 39.100   -13 05 25.00    2394 163.7 N   7.5   1089 225.2  +16 098 -16.53  35.7404 -22.0937   1030.886
2018 06 02 16:46:00  15 44 31.546   -13 07 33.91    2229 163.7 N   7.3  956.2 215.7  +16 098 -16.57  34.5705 -22.0705    941.715
2018 06 02 16:46:10  15 44 26.820   -13 09 44.46    2063 163.7 N   7.2  832.7 199.3  +16 098 -16.61  33.3736 -22.0387    854.297
2018 06 02 16:46:20  15 44 25.827   -13 11 56.44    1896 163.7 N   7.0  799.6 172.8  +16 098 -16.65  32.1493 -21.9977    768.705
2018 06 02 16:46:30  15 44 29.825   -13 14 09.47    1730 163.8 N   6.8   1002 142.8  +16 098 -16.69  30.8974 -21.9469    685.016
2018 06 02 16:46:40  15 44 40.624   -13 16 23.01    1563 163.8 N   6.6   1527 121.5  +16 098 -16.73  29.6179 -21.8856    603.308
2018 06 02 16:46:50  15 45 00.915   -13 18 36.19    1395 163.9 N   6.3   2420 109.1  +16 098 -16.76  28.3106 -21.8133    523.660
2018 06 02 16:47:00  15 45 34.876   -13 20 47.51    1227 164.1 N   6.0   3809 101.7  +16 099 -16.80  26.9756 -21.7294    446.153
2018 06 02 16:47:10  15 46 29.366   -13 22 54.33    1059 164.3 N   5.7   5993  97.0  +16 099 -16.84  25.6129 -21.6331    370.872
2018 06 02 16:47:20  15 47 56.470   -13 24 51.48  890.6k 164.6 N   5.3   9607  93.9  +16 099 -16.87  24.2228 -21.5238    297.902
2018 06 02 16:47:30  15 50 19.628   -13 26 27.63  721.8k 165.0 N   4.9  16129  91.7  +15 099 -16.90  22.8057 -21.4009    227.328
2018 06 02 16:47:40  15 54 31.025   -13 27 13.16  552.7k 165.8 N   4.2  29626  90.0  +14 099 -16.91  21.3618 -21.2638    159.239
2018 06 02 16:47:50  16 02 54.760   -13 25 26.08  383.7k 167.3 N   3.4  64849  88.5  +12 100 -16.88  19.8918 -21.1119     93.722
2018 06 02 16:48:00  16 25 22.090   -13 11 12.27  215.8k 170.2 N  Sha  212203  86.7  +07 101 -16.62  18.3963 -20.9445     30.866
2018 06 02 16:48:10  18 55 27.540   -08 22 09.60  62090m 144.9 N  Sha  ------  79.1  -28 112 -10.97  16.8762 -20.7612    -29.239