"Pseudo-MPEC" for YS17B74

Created 2017 Sep 20 11:59:03 UT using Find_Orb

Astrometry:
     YS17B74  C2017 09 20.17211 21 50 41.20 -18 18 39.3          17.8 VqNEOCP703
     YS17B74  C2017 09 20.18282 21 51 11.00 -18 18 08.0          17.9 VqNEOCP703
     YS17B74  C2017 09 20.18817 21 51 26.11 -18 17 50.9          17.8 VqNEOCP703
     YS17B74  C2017 09 20.22047 21 53 02.52 -18 15 44.7          17.8 VqNEOCPI52
     YS17B74  C2017 09 20.22092 21 53 03.92 -18 15 42.8          17.7 VqNEOCPI52
     YS17B74  C2017 09 20.22137 21 53 05.33 -18 15 40.4          17.7 VqNEOCPI52
     YS17B74  C2017 09 20.22184 21 53 06.78 -18 15 38.6          17.9 VqNEOCPI52

Station data:
(703) Catalina Sky Survey  (N32.417003 W110.732640)  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. 0.68 m Schmidt + CCD.
(I52) Steward Observatory, Mt. Lemmon Station  (N32.442544 W110.788920)
   US/Arizona.

Orbital elements:  YS17B74
   Perigee 2017 Sep 20.859935 +/- 0.015 TT = 20:38:18 (JD 2458017.359935)
Epoch 2017 Sep 20.0 TT = JDT 2458016.5                        Gray
q 93275.9662 +/- 7620               (J2000 equator)
H   28.6  G 0.15                    Peri.   14.09853 +/- 0.54
                                    Node    35.11911 +/- 0.12
e  21.4624318 +/- 5.19              Incl.   19.17355 +/- 0.17
From 7 observations 2017 Sept. 20 (71.6 min); mean residual 0".170
Residuals in arcseconds: 
170920 703 .092- 7.0m-    170920 I52 .103+ .060+    170920 I52 .208- .164-    
170920 703 .382+ .022+    170920 I52 .039+ .108-    
170920 703 .313- .017-    170920 I52 .091+ .215+    

Ephemerides (geocentric):
Date (UTC) HH   RA              Dec         delta   r     elong  mag " sig PA
---- -- -- --  ------------   ------------  ------ ------ -----  --- ---- ---
2017 09 20 12  22 24 56.311   -16 34 34.02   309656 1.0061 153.8 16.4  780  61
2017 09 20 13  22 33 57.505   -16 11 25.34   277376 1.0059 155.7 16.1 1029  64
2017 09 20 14  22 45 16.998   -15 40 12.52   245544 1.0057 158.1 15.8 1377  66
2017 09 20 15  22 59 51.110   -14 56 35.95   214370 1.0055 161.1 15.4 1879  67
2017 09 20 16  23 19 07.292   -13 53 07.73   184207 1.0054 164.8 15.0 2629  68
2017 09 20 17  23 45 23.118   -12 16 33.30   155666 1.0052 168.5 14.4 3790  68
2017 09 20 18  00 22 09.039   -09 43 42.20   129864 1.0050 168.4 14.1 5606  68
2017 09 20 19  01 13 59.864   -05 39 49.78   108825 1.0048 158.9 14.0 8249  67
2017 09 20 20  02 23 42.695   +00 18 03.23    95822 1.0046 142.0 14.2 185'  67
2017 09 20 21  03 44 49.176   +07 09 06.66    94303 1.0044 121.4 14.8 204'  69
2017 09 20 22  05 00 38.432   +12 37 46.26   104776 1.0042 102.4 15.6 185'  73
2017 09 20 23  05 59 36.906   +15 52 35.23   124203 1.0041  88.0 16.5 9251  77
2017 09 21 00  06 41 49.134   +17 33 05.01   149073 1.0039  78.0 17.4 7768  80
2017 09 21 01  07 11 44.700   +18 23 22.43   177070 1.0037  71.0 18.1 6761  82
2017 09 21 02  07 33 26.138   +18 48 40.32   206901 1.0035  66.0 18.8 6099  84
2017 09 21 03  07 49 38.009   +19 01 23.05   237860 1.0033  62.3 19.3 5658  86
2017 09 21 04  08 02 05.193   +19 07 32.80   269545 1.0031  59.5 19?? 5356  87
2017 09 21 05  08 11 54.661   +19 10 11.28   301720 1.0029  57.2 20?? 5144  88
2017 09 21 06  08 19 50.160   +19 10 53.42   334237 1.0027  55.4 20?? 4991  89
2017 09 21 07  08 26 21.077   +19 10 30.71   367001 1.0025  54.0 20?? 4879  90
2017 09 21 08  08 31 47.719   +19 09 32.04   399946 1.0024  52.8 21?? 4795  91
2017 09 21 09  08 36 24.489   +19 08 14.05   433030 1.0022  51.8 21?? 4731  91
2017 09 21 10  08 40 21.853   +19 06 46.50   466220 1.0020  50.9 21?? 4682  92
2017 09 21 11  08 43 47.574   +19 05 15.20   499494 1.0018  50.1 21?? 4643  92
2017 09 21 12  08 46 47.524   +19 03 43.58   532833 1.0016  49.5 22?? 4612  92
2017 09 21 13  08 49 26.222   +19 02 13.68   566227 1.0014  48.9 22?? 4588  93
2017 09 21 14  08 51 47.195   +19 00 46.68   599664 1.0013  48.4 22?? 4569  93
2017 09 21 15  08 53 53.239   +18 59 23.18   633136 1.0011  48.0 22?? 4553  93
2017 09 21 16  08 55 46.592   +18 58 03.50   666639 1.0009  47.6 22?? 4540  93
2017 09 21 17  08 57 29.072   +18 56 47.70   700166 1.0007  47.3 23?? 4529  94