Orbit Fit and Astrometric record for 17UX51

The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.

# Object: 17UX51    
# Created Thu Apr 18 01:10:45 2019
# Orbit generated from Bernstein formalism
# Fitting   72 observations of   74
# Arc:   2.93y
# First observation: 2015/12/05
#  Last observation: 2018/11/10
Preliminary a, adot, b, bdot, g, gdot:
  -0.002265  -0.001794   0.032012  -0.172262   0.084922   0.000000
# Chi-squared of fit:   137.81 DOF:  138 RMS:  0.24
# Min/Max residuals:    -0.74    0.57
# Exact a, adot, b, bdot, g, gdot:
 -1.011370E-06 -3.196938E-03 -2.554137E-05 -1.185987E-01  7.451616E-02 -9.802744E-02
# Covariance matrix:
  1.2445E-13 -5.3335E-14 -9.2734E-15  1.2858E-14 -1.9162E-14 -2.2861E-14
 -5.3335E-14  2.6930E-14  3.1189E-15 -4.1958E-15 -7.4400E-16  7.3040E-15
 -9.2734E-15  3.1189E-15  1.8120E-13 -1.3752E-13  2.9203E-14  1.4736E-13
  1.2858E-14 -4.1958E-15 -1.3752E-13  1.4090E-13 -4.0691E-14 -2.0017E-13
 -1.9162E-14 -7.4400E-16  2.9203E-14 -4.0691E-14  7.1579E-14  7.2594E-14
 -2.2861E-14  7.3040E-15  1.4736E-13 -2.0017E-13  7.2594E-14  3.5088E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   20.783460   35.431118   -0.593062    0.280491   -0.738530  2457361.717899
# Heliocentric elements and errors
Epoch:              2457360.5000  =  2015/12/04
Mean Anomaly:          345.45948 +/-     0.001
Argument of Peri:      255.10265 +/-     0.001
Long of Asc Node:      217.80488 +/-     0.000
Inclination:            90.49896 +/-     0.000
Eccentricity:         0.74897746 +/-    0.0000
Semi-Major Axis:     30.27914628 +/-    0.0012
Time of Perihelion: 2459818.5535 +/-       0.0
Perihelion:           7.60074834 +/-    0.0004
Aphelion:            52.95754422 +/-    0.0022
Period (y)              166.6187 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           10.51946154 +/-    0.0000
Ecliptic Y            8.21364961 +/-    0.0000
Ecliptic Z            4.76154004 +/-    0.0000
Ecliptic XDOT        -0.00141692 +/-    0.0000
Ecliptic YDOT        -0.00115826 +/-    0.0000
Ecliptic ZDOT        -0.00535195 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   14.17022846 +/-    0.0000
Geocenter to KBO     13.41990825 +/-    0.0000
# Hcoef: 10.95

The following table shows the complete astrometric record for 17UX51. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (17UX51) followed by the observatory code and reference code for the source of the astrometry.

2015 12  05.21711  01 40 13.338  +32 45 43.52  22.3G 17UX51    F51  C~2jiV      
2015 12  05.22813  01 40 13.208  +32 45 41.31  22.8G 17UX51    F51  C~2jiV      
2015 12  05.23918  01 40 13.077  +32 45 39.25  23.2G 17UX51    F51  C~2jiV      
2015 12  05.25034  01 40 12.943  +32 45 36.94  22.5G 17UX51    F51  C~2jiV      
2015 12  06.21621  01 40 01.598  +32 42 25.58  22.6G 17UX51    F51  C~2jiV      
2015 12  06.22883  01 40 01.457  +32 42 23.13  22.3G 17UX51    F51  C~2jiV      
2015 12  06.25104  01 40 01.177  +32 42 18.86  22.3G 17UX51    F51  C~2jiV      
2016 10  08.39602  02 08 36.558  +28 36 14.95  21.7G 17UX51    F51  C~2jiV      
2016 10  08.40729  02 08 36.355  +28 36 13.47  22.1G 17UX51    F51  C~2jiV      
2016 10  08.41861  02 08 36.144  +28 36 11.88  21.8G 17UX51    F51  C~2jiV      
2016 10  08.43001  02 08 35.940  +28 36 10.36  22.2G 17UX51    F51  C~2jiV      
2017 08  04.59232  02 32 12.838  +22 08 52.29  21.7G 17UX51    F51  C~2jiV      
2017 08  04.60475  02 32 12.865  +22 08 51.77  21.8G 17UX51    F51  C~2jiV      
2017 10  18.53211  02 19 16.051  +19 33 13.83  21.9w 17UX51    F51  C~2Pmz      
2017 10  18.55789  02 19 15.559  +19 33 08.90  21.9w 17UX51    F51  C~2Pmz      
2017 10  18.57079  02 19 15.304  +19 33 06.40  21.7w 17UX51    F51  C~2Pmz      
2017 10  27.52065  02 16 20.048  +19 03 16.83  21.7w 17UX51    F51  C~2Pmz      
2017 10  27.53296  02 16 19.776  +19 03 13.92  21.3w 17UX51    F51  C~2Pmz      
2017 10  27.54524  02 16 19.534  +19 03 11.48  21.4w 17UX51    F51  C~2Pmz      
2017 10  27.55749  02 16 19.292  +19 03 09.10  21.5w 17UX51    F51  C~2Pmz      
2017 10  28.22018  02 16 06.23   +19 00 53.1   21.8G 17UX51    V06  C~2Pmz      
2017 10  28.22345  02 16 06.16   +19 00 52.4   21.4G 17UX51    V06  C~2Pmz      
2017 10  28.22672  02 16 06.12   +19 00 51.8   21.2G 17UX51    V06  C~2Pmz      
2017 10  28.22999  02 16 06.05   +19 00 50.9   21.4G 17UX51    V06  C~2Pmz      
2017 10  28.34944  02 16 03.63   +19 00 26.6   21.5R 17UX51    691  C~2Pmz      
2017 10  28.36301  02 16 03.33   +19 00 23.7   21.4R 17UX51    691  C~2Pmz      
2017 10  28.37657  02 16 03.12   +19 00 22.0   21.2R 17UX51    691  C~2Pmz      
2017 10  31.28576  02 15 05.55   +18 50 20.0   20.4R 17UX51    695  C~2Y5B      
2017 10  31.29432  02 15 05.38   +18 50 18.3   21.4R 17UX51    695  C~2Y5B      
2017 10  31.30288  02 15 05.21   +18 50 16.4   20.5R 17UX51    695  C~2Y5B      
2017 11  10.86228  02 11 38.78   +18 13 12.0   20.8R 17UX51    Z84  C~2Pmz      
2017 11  10.87131  02 11 38.60   +18 13 10.0   21.1R 17UX51    Z84  C~2Pmz      
2017 11  10.87988  02 11 38.44   +18 13 08.0   21.0R 17UX51    Z84  C~2Pmz      
2017 11  12.22759  02 11 12.65   +18 08 22.1         17UX51    711  C~2Pmz      
2017 11  12.23274  02 11 12.54   +18 08 20.9         17UX51    711  C~2Pmz      
2017 11  12.23778  02 11 12.44   +18 08 19.8         17UX51    711  C~2Pmz      
2017 11  13.24875  02 10 53.27   +18 04 44.0         17UX51    U69  C~2SWM      
2017 11  13.25341  02 10 53.18   +18 04 43.2         17UX51    U69  C~2SWM      
2017 11  13.25806  02 10 53.12   +18 04 42.7   22.1w 17UX51    U69  C~2SWM      
2017 11  13.43555  02 10 49.696  +18 04 05.27  20.7G 17UX51    F51  C~2jiV      
2017 11  22.43051  02 08 05.625  +17 32 17.02  21.8w 17UX51    F51  C~2QkY      
2017 11  22.44444  02 08 05.381  +17 32 14.03  21.6w 17UX51    F51  C~2QkY      
2017 11  22.45840  02 08 05.129  +17 32 11.17  21.6w 17UX51    F51  C~2QkY      
2017 11  22.47236  02 08 04.884  +17 32 07.83  21.4w 17UX51    F51  C~2QkY      
2017 12  07.20786  02 04 11.831  +16 41 45.72  21.4G 17UX51    F51  C~2jiV      
2017 12  07.23541  02 04 11.447  +16 41 40.60  21.5G 17UX51    F51  C~2jiV      
2017 12  07.24917  02 04 11.254  +16 41 37.82  21.6G 17UX51    F51  C~2jiV      
2017 12  10.359440 02 03 29.221  +16 31 29.14  21.3G 17UX51    568  C~2SWM      
2017 12  10.360615 02 03 29.205  +16 31 28.88  21.4G 17UX51    568  C~2SWM      
2018 01  20.11101  01 59 17.44   +14 44 53.0   21.6R 17UX51    691  C~2WcQ      
2018 01  20.12645  01 59 17.38   +14 44 51.7   22.0R 17UX51    691  C~2WcQ      
2018 01  22.11273  01 59 20.25   +14 41 07.4         17UX51    291  C~2WcQ      
2018 01  22.14164  01 59 20.31   +14 41 05.0         17UX51    291  C~2WcQ      
2018 01  22.17697  01 59 20.32   +14 41 01.1         17UX51    291  C~2WcQ      
2018 02  04.09425  02 00 12.66   +14 20 16.9   21.6R 17UX51    691  C~2XMR      
2018 02  04.11614  02 00 12.78   +14 20 14.5   21.3R 17UX51    691  C~2XMR      
2018 02  04.13802  02 00 12.90   +14 20 13.3   22.0R 17UX51    691  C~2XMR      
2018 02  05.09074  02 00 19.00   +14 18 55.6   21.8R 17UX51    691  C~2XMR      
2018 02  05.10858  02 00 19.11   +14 18 53.9         17UX51    691  C~2XMR      
2018 02  05.12639  02 00 19.19   +14 18 51.9   21.9R 17UX51    691  C~2XMR      
2018 02  06.09857  02 00 25.75   +14 17 35.2   22.4R 17UX51    691  C~2XMR      
2018 02  06.12456  02 00 25.94   +14 17 33.1   21.9R 17UX51    691  C~2XMR      
2018 02  06.15047  02 00 26.06   +14 17 31.1   21.7R 17UX51    691  C~2XMR      
2018 08  11.613446 02 47 15.588  +12 21 27.17  21.4G 17UX51    568  C~2jiV      
2018 08  11.616978 02 47 15.590  +12 21 26.68  21.4G 17UX51    568  C~2jiV      
2018 11  02.41443  02 29 40.150  +07 33 06.28  20.7w 17UX51    F52  C~2ogH      
2018 11  02.44148  02 29 39.569  +07 32 59.87  21.0w 17UX51    F52  C~2ogH      
2018 11  02.45493  02 29 39.265  +07 32 56.41  20.9w 17UX51    F52  C~2ogH      
2018 11  08.38119  02 27 32.99   +07 09 15.0   21.0V 17UX51    691  C~2qBT      
2018 11  08.39037  02 27 32.79   +07 09 12.4   20.9V 17UX51    691  C~2qBT      
2018 11  08.39954  02 27 32.60   +07 09 11.2   21.0V 17UX51    691  C~2qBT      
2018 11  10.42772  02 26 49.792  +07 01 11.59  20.7w 17UX51    F52  C~2qby      
2018 11  10.45251  02 26 49.253  +07 01 05.64  20.7w 17UX51    F52  C~2qby      
2018 11  10.46481  02 26 48.990  +07 01 02.65  20.6w 17UX51    F52  C~2qby      

The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.

  1   0.0000      0.00     0.07       0.00     0.08
  2   0.0000     -2.36     0.10      -1.41     0.02
  3   0.0001     -4.68     0.18      -2.67     0.12
  4   0.0001     -7.13     0.16      -4.15     0.01
  5   0.0027   -213.01    -0.04    -125.50    -0.00
  6   0.0028   -215.60     0.08    -127.08    -0.01
  7   0.0028   -220.50    -0.06    -129.65     0.17
  8   0.8437  15296.16    -0.03  -21911.86    -0.25
  9   0.8438  15293.12    -0.01  -21912.38    -0.16
 10   0.8438  15289.94    -0.12  -21912.97    -0.14
 11   0.8438  15286.88    -0.09  -21913.53    -0.07
 12   1.6656  27028.56    -0.29  -51067.71    -0.09
 13   1.6657  27028.79    -0.09  -51068.37    -0.03
 14   1.8708  13335.73    -0.24  -56944.27     0.08
 15   1.8709  13327.26    -0.03  -56946.88     0.13
 16   1.8709  13322.89    -0.07  -56948.18     0.17
 17   1.8954  10288.79     0.40  -57905.68     0.05
 18   1.8955  10284.03    -0.07  -57907.29    -0.21
 19   1.8955  10279.84     0.01  -57908.57    -0.14
 20   1.8955  10275.67     0.11  -57909.78    -0.01
 21   1.8973  10048.10    -0.12  -57983.22     0.06
 22   1.8973  10046.89    -0.19  -57983.58     0.05
 23   1.8974  10046.14     0.19  -57983.99    -0.01
 24   1.8974  10044.86     0.05  -57984.56    -0.22
 25   1.8977  10002.98    -0.17  -57997.24     0.10
 26   1.8977   9997.83    -0.59  -57998.70     0.13
 27   1.8978   9994.33 (   0.63) -57999.38 (   0.94)
 28   1.9057   8989.39     0.04  -58324.61     0.21
 29   1.9058   8986.45     0.09  -58325.49     0.28
 30   1.9058   8983.44     0.08  -58326.58     0.15
 31   1.9347   5343.65     0.25  -59547.25    -0.06
 32   1.9347   5340.45     0.16  -59548.37    -0.12
 33   1.9347   5337.53     0.18  -59549.59    -0.34
 34   1.9384   4878.39     0.12  -59708.91     0.30
 35   1.9384   4876.44    -0.06  -59709.57     0.25
 36   1.9385   4874.66    -0.11  -59710.18     0.23
 37   1.9412   4531.99    -0.20  -59831.78    -0.46
 38   1.9412   4530.46    -0.15  -59832.13    -0.26
 39   1.9412   4529.44     0.43  -59832.33     0.09
 40   1.9417   4468.60    -0.14  -59852.89     0.44
 41   1.9664   1504.53     0.21  -60949.68     0.06
 42   1.9664   1500.05     0.24  -60951.46    -0.01
 43   1.9664   1495.51     0.21  -60953.07     0.11
 44   1.9665   1490.90     0.11  -60955.20    -0.30
 45   2.0068  -2864.23    -0.09  -62814.52    -0.29
 46   2.0069  -2871.50     0.14  -62817.71    -0.02
 47   2.0069  -2875.23     0.16  -62819.53    -0.11
 48   2.0154  -3688.84     0.16  -63218.29    -0.10
 49   2.0155  -3689.17     0.14  -63218.48    -0.13
 50   2.1270  -9645.06     0.57  -68451.75    -0.61
 51   2.1271  -9646.41    -0.28  -68452.77     0.29
 52   2.1325  -9690.90    -0.61  -68702.68    -0.58
 53   2.1326  -9690.96    -0.09  -68705.51     0.17
 54   2.1327  -9692.30    -0.74  -68709.64     0.45
 55   2.1680  -9416.62     0.15  -70304.09     0.09
 56   2.1681  -9415.81    -0.22  -70307.28    -0.46
 57   2.1682  -9414.54    -0.14  -70309.21     0.26
 58   2.1708  -9356.54     0.09  -70424.93     0.31
 59   2.1708  -9355.61    -0.04  -70427.33     0.06
 60   2.1709  -9355.22    -0.71  -70429.88    -0.33
 61   2.1735  -9290.19     0.15  -70547.18     0.23
 62   2.1736  -9288.26     0.39  -70550.45     0.09
 63   2.1737  -9287.30    -0.35  -70553.22     0.45
 64   2.6842  30672.79    -0.03  -93617.22    -0.12
 65   2.6842  30672.68    -0.03  -93617.80    -0.13
 66   2.9109   8492.09     0.13 -107941.35    -0.23
 67   2.9109   8480.58     0.27 -107945.54    -0.10
 68   2.9110   8474.52     0.01 -107947.85    -0.27
 69   2.9272   5958.52    -0.35 -108890.92     0.54
 70   2.9272   5954.40    -0.54 -108892.83     0.06
 71   2.9273   5950.94 (  -0.09)-108893.11 (   1.20)
 72   2.9328   5096.35     0.48 -109209.85     0.13
 73   2.9329   5085.62     0.32 -109213.73     0.03
 74   2.9329   5080.35     0.29 -109215.73    -0.08

The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.

17UX51    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        30.169    30.171    30.167
ecceobj         0.747     0.747     0.747
incobj         90.334    90.334    90.334
qmin            7.425     7.320     7.551
qmax           53.397    53.266    53.359
amean          30.002    28.818    30.009
amin           29.250    26.659    29.545
amax           30.555    30.497    30.540
emean           0.746     0.737     0.744
emin            0.741     0.721     0.740
emax            0.749     0.749     0.749
imean          90.938    91.445    90.966
imin           90.742    90.750    90.722
imax           91.263    92.035    91.172
excite_mean     1.247     1.242     1.246
fracstop        0.003     0.008     0.002
cjmean          0.997     1.026     0.996

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
libcent 1      -180.0    -180.0    -180.0
libamp  1      -180.0    -180.0    -180.0
libcent 2      -180.0    -180.0    -180.0
libamp  2      -180.0    -180.0    -180.0
libcent 3      -180.0    -180.0    -180.0
libamp  3      -180.0    -180.0    -180.0
libcent 4      -180.0    -180.0    -180.0
libamp  4      -180.0    -180.0    -180.0

kozaimean       251.5     244.0     252.7
kozaiamp          3.4      12.5       2.5