Orbit Fit and Astrometric record for 10XE91

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: 10XE91    
# Created Mon Apr 22 01:09:04 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting  108 observations of  108
# Arc:  19.28y
# First observation: 1998/09/22
#  Last observation: 2018/01/03
# Chi-squared of fit:   109.71 DOF:  210 RMS:  0.18
# Min/Max residuals:    -0.89    0.75
# Exact a, adot, b, bdot, g, gdot:
  2.084429E-05  3.780932E-02 -9.943956E-07 -1.823461E-03  2.951214E-02  3.980139E-03
# Covariance matrix:
  8.1426E-14 -8.9202E-15  1.1036E-15  1.8133E-16  2.4301E-14 -9.8922E-15
 -8.9202E-15  6.4657E-15  9.7260E-16 -3.4079E-16  7.1230E-15  8.6942E-15
  1.1036E-15  9.7260E-16  5.2118E-14 -3.3335E-15  3.6274E-15  1.2073E-15
  1.8133E-16 -3.4079E-16 -3.3335E-15  2.9653E-16 -5.5575E-16 -4.6840E-16
  2.4301E-14  7.1230E-15  3.6274E-15 -5.5575E-16  4.6989E-14  7.5466E-15
 -9.8922E-15  8.6942E-15  1.2073E-15 -4.6840E-16  7.5466E-15  1.2370E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
  -17.801610   48.346184    0.751676   -0.199687   -0.621155  2451078.930944
# Heliocentric elements and errors
Epoch:              2451078.5000  =  1998/09/22
Mean Anomaly:            4.94593 +/-     0.001
Argument of Peri:      244.86967 +/-     0.001
Long of Asc Node:      147.41465 +/-     0.000
Inclination:            17.73665 +/-     0.000
Eccentricity:         0.46584013 +/-    0.0000
Semi-Major Axis:     63.90191852 +/-    0.0040
Time of Perihelion: 2448515.1114 +/-       0.4
Perihelion:          34.13384030 +/-    0.0028
Aphelion:            93.66999674 +/-    0.0061
Period (y)              510.8331 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           22.44538139 +/-    0.0002
Ecliptic Y           24.09250071 +/-    0.0002
Ecliptic Z          -10.35922035 +/-    0.0001
Ecliptic XDOT        -0.00242141 +/-    0.0000
Ecliptic YDOT         0.00256435 +/-    0.0000
Ecliptic ZDOT        -0.00027399 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.51888147 +/-    0.0002
Geocenter to KBO     33.88431011 +/-    0.0002
# Hcoef:  6.68

The following table shows the complete astrometric record for 10XE91. 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 (10XE91) followed by the observatory code and reference code for the source of the astrometry.

1998 09  22.430213 03 22 58.17   +00 08 32.4   21.9V 10XE91    645  C~2POP      
1998 09  22.431042 03 22 58.17   +00 08 32.3   21.6V 10XE91    645  C~2POP      
1998 09  22.433529 03 22 58.17   +00 08 32.3   22.7V 10XE91    645  C~2POP      
1998 09  25.421982 03 22 49.79   +00 06 42.5   22.0V 10XE91    645  C~2POP      
1998 09  25.422811 03 22 49.79   +00 06 42.7   21.5V 10XE91    645  C~2POP      
1998 09  25.425297 03 22 49.79   +00 06 42.5   22.5V 10XE91    645  C~2POP      
1998 10  29.327359 03 20 26.61   -00 12 37.5   21.5V 10XE91    645  C~2POP      
1998 10  29.328188 03 20 26.61   -00 12 37.6   21.3V 10XE91    645  C~2POP      
1998 10  29.330676 03 20 26.61   -00 12 37.6   22.6V 10XE91    645  C~2POP      
1998 11  15.280013 03 18 55.47   -00 19 43.6   21.6V 10XE91    645  C~2POP      
1998 11  15.280842 03 18 55.46   -00 19 43.8   21.2V 10XE91    645  C~2POP      
1998 11  15.283329 03 18 55.45   -00 19 43.7   22.6V 10XE91    645  C~2POP      
1998 11  19.268946 03 18 33.69   -00 21 00.6   21.8V 10XE91    645  C~2POP      
1998 11  19.269776 03 18 33.68   -00 21 00.7   21.7V 10XE91    645  C~2POP      
1998 11  19.272263 03 18 33.66   -00 21 00.6   22.8V 10XE91    645  C~2POP      
2000 11  18.258179 03 35 38.35   +00 36 13.7   21.8V 10XE91    645  C~2POP      
2000 11  18.259009 03 35 38.32   +00 36 13.8   21.7V 10XE91    645  C~2POP      
2000 11  18.264196 03 35 38.31   +00 36 13.7   22.6V 10XE91    645  C~2POP      
2000 11  27.245220 03 34 49.32   +00 33 52.2   21.7V 10XE91    645  C~2POP      
2000 11  27.246049 03 34 49.31   +00 33 52.2   21.3V 10XE91    645  C~2POP      
2000 11  27.248537 03 34 49.31   +00 33 52.2   22.4V 10XE91    645  C~2POP      
2001 11  11.367739 03 44 42.44   +01 06 42.6   21.7V 10XE91    645  C~2POP      
2001 11  11.368568 03 44 42.43   +01 06 42.5   21.4V 10XE91    645  C~2POP      
2001 11  11.371056 03 44 42.43   +01 06 42.3   22.4V 10XE91    645  C~2POP      
2001 11  21.323626 03 43 48.03   +01 03 26.6   21.7V 10XE91    645  C~2POP      
2001 11  21.324455 03 43 48.02   +01 03 26.6   21.1V 10XE91    645  C~2POP      
2001 11  21.326943 03 43 48.01   +01 03 26.4   22.4V 10XE91    645  C~2POP      
2002 01  09.151773 03 40 04.57   +01 03 01.5   22.3V 10XE91    645  C~2POP      
2002 01  09.152602 03 40 04.57   +01 03 01.8   21.9V 10XE91    645  C~2POP      
2002 01  09.155090 03 40 04.58   +01 03 01.4   23.7V 10XE91    645  C~2POP      
2002 01  13.164572 03 39 53.74   +01 04 12.3   21.9V 10XE91    645  C~2POP      
2002 01  13.165401 03 39 53.74   +01 04 12.2   21.6V 10XE91    645  C~2POP      
2002 01  13.167889 03 39 53.74   +01 04 12.3   23.5V 10XE91    645  C~2POP      
2010 11  17.54394  04 56 00.209  +04 54 45.61  21.6i 10XE91    F51  C~1w3m      
2010 12  04.50962  04 54 30.826  +04 51 16.39  22.8w 10XE91    F51  C~1w3m      
2010 12  05.41761  04 54 25.840  +04 51 08.40  22.3w 10XE91    F51  C~1w3m      
2010 12  05.43251  04 54 25.787  +04 51 08.38  22.4w 10XE91    F51  C~1w3m      
2010 12  05.44713  04 54 25.708  +04 51 08.42  22.5w 10XE91    F51  C~1w3m      
2010 12  05.46171  04 54 25.623  +04 51 08.37  22.2w 10XE91    F51  C~1w3m      
2011 10  23.45308  05 05 16.709  +05 25 54.57  22.4w 10XE91    F51  C~1w3m      
2011 10  23.46795  05 05 16.679  +05 25 54.02  22.6w 10XE91    F51  C~1w3m      
2011 10  23.48284  05 05 16.621  +05 25 53.77  22.5w 10XE91    F51  C~1w3m      
2011 10  23.49778  05 05 16.579  +05 25 53.23  22.5w 10XE91    F51  C~1w3m      
2011 12  01.34532  05 02 20.954  +05 14 28.53  22.9w 10XE91    F51  C~1w3m      
2011 12  01.35919  05 02 20.881  +05 14 28.34  23.0w 10XE91    F51  C~1w3m      
2011 12  01.37307  05 02 20.808  +05 14 28.22  22.6w 10XE91    F51  C~1w3m      
2011 12  01.38684  05 02 20.717  +05 14 28.02  22.4w 10XE91    F51  C~1w3m      
2011 12  16.39839  05 00 59.889  +05 13 02.49  22.2r 10XE91    F51  C~1w3m      
2011 12  17.30965  05 00 54.953  +05 13 00.60  23.5G 10XE91    F51  C~2rXq      
2012 02  10.28038  04 57 22.841  +05 24 56.04  22.1G 10XE91    F51  C~2rXq      
2012 02  15.21392  04 57 16.314  +05 27 05.71  22.0G 10XE91    F51  C~2rXq      
2012 12  07.48507  05 09 09.910  +05 35 34.96  22.5G 10XE91    F51  C~2rXq      
2012 12  22.37009  05 07 50.377  +05 35 04.93  21.6i 10XE91    F51  C~1w3m      
2013 01  08.29239  05 06 27.567  +05 36 52.46  22.3w 10XE91    F51  C~1w3m      
2013 01  08.30620  05 06 27.528  +05 36 52.73  22.1w 10XE91    F51  C~1w3m      
2013 01  08.32002  05 06 27.461  +05 36 53.17  22.1w 10XE91    F51  C~1w3m      
2013 01  08.33396  05 06 27.392  +05 36 52.86  22.1w 10XE91    F51  C~1w3m      
2013 01  27.33280  05 05 15.267  +05 41 45.89  21.3i 10XE91    F51  C~1w3m      
2013 12  11.39704  05 16 10.073  +05 56 34.29  22.3G 10XE91    F51  C~2rXq      
2013 12  29.40197  05 14 35.454  +05 56 48.57  22.1G 10XE91    F51  C~2rXq      
2014 02  28.25231  05 11 40.759  +06 16 02.61  22.3w 10XE91    F51  C~1w3m      
2014 02  28.26447  05 11 40.748  +06 16 02.67  22.3w 10XE91    F51  C~1w3m      
2014 02  28.28872  05 11 40.749  +06 16 03.23  22.2w 10XE91    F51  C~1w3m      
2014 11  04.57584  05 26 20.941  +06 24 19.28  21.2G 10XE91    F51  C~2rXq      
2014 12  16.41738  05 22 58.060  +06 16 55.89  22.9G 10XE91    F51  C~2rXq      
2014 12  16.42868  05 22 57.999  +06 16 56.14  22.9G 10XE91    F51  C~2rXq      
2014 12  16.43990  05 22 57.923  +06 16 55.83  22.2G 10XE91    F51  C~2rXq      
2015 01  15.37446  05 20 30.277  +06 20 03.72  22.9G 10XE91    F51  C~2rXq      
2015 01  15.38683  05 20 30.213  +06 20 03.96  22.5G 10XE91    F51  C~2rXq      
2015 01  15.39921  05 20 30.165  +06 20 04.04  22.5G 10XE91    F51  C~2rXq      
2015 01  15.41159  05 20 30.110  +06 20 04.30  22.6G 10XE91    F51  C~2rXq      
2015 01  17.35318  05 20 22.010  +06 20 31.42  22.5G 10XE91    F51  C~2rXq      
2015 01  17.36715  05 20 21.948  +06 20 31.71  22.2G 10XE91    F51  C~2rXq      
2015 01  17.38097  05 20 21.901  +06 20 31.79  22.2G 10XE91    F51  C~2rXq      
2015 01  17.39481  05 20 21.839  +06 20 31.92  22.0G 10XE91    F51  C~2rXq      
2015 11  17.47656  05 32 32.381  +06 40 28.29  22.1G 10XE91    F51  C~2rXq      
2015 12  04.41028  05 31 09.555  +06 37 33.45  22.7G 10XE91    F51  C~2rXq      
2015 12  05.40771  05 31 04.345  +06 37 27.00  22.2G 10XE91    F51  C~2rXq      
2015 12  05.42012  05 31 04.287  +06 37 26.89  22.7G 10XE91    F51  C~2rXq      
2015 12  05.43254  05 31 04.217  +06 37 26.75  22.1G 10XE91    F51  C~2rXq      
2015 12  05.44506  05 31 04.151  +06 37 26.82  22.6G 10XE91    F51  C~2rXq      
2016 01  11.40553  05 27 54.773  +06 39 01.91  22.5G 10XE91    F51  C~2rXq      
2016 01  11.41739  05 27 54.714  +06 39 02.07  22.4G 10XE91    F51  C~2rXq      
2016 01  11.42925  05 27 54.662  +06 39 02.11  22.6G 10XE91    F51  C~2rXq      
2016 01  11.44106  05 27 54.633  +06 39 02.26  22.8G 10XE91    F51  C~2rXq      
2016 01  25.38214  05 26 57.125  +06 42 24.75  22.3G 10XE91    F51  C~2rXq      
2016 02  06.33526  05 26 19.615  +06 46 20.40  22.6G 10XE91    F51  C~2rXq      
2016 02  06.34605  05 26 19.588  +06 46 20.54  22.7G 10XE91    F51  C~2rXq      
2016 02  06.35687  05 26 19.562  +06 46 20.83  23.0G 10XE91    F51  C~2rXq      
2016 02  06.36767  05 26 19.543  +06 46 21.20  21.8G 10XE91    F51  C~2rXq      
2016 02  26.24734  05 25 47.155  +06 54 32.35  23.4G 10XE91    F51  C~2rXq      
2016 02  26.26009  05 25 47.172  +06 54 32.46  23.1G 10XE91    F51  C~2rXq      
2016 03  05.28007  05 25 45.743  +06 58 14.88  22.6G 10XE91    F51  C~2rXq      
2016 10  13.59541  05 41 16.596  +07 09 42.89  22.8G 10XE91    F51  C~2rXq      
2016 10  13.60754  05 41 16.563  +07 09 42.50  22.8G 10XE91    F51  C~2rXq      
2016 10  13.61966  05 41 16.555  +07 09 42.22  22.2G 10XE91    F51  C~2rXq      
2016 10  13.63184  05 41 16.526  +07 09 42.13  22.3G 10XE91    F51  C~2rXq      
2017 01  03.35445  05 35 29.328  +06 57 00.16  22.6G 10XE91    F51  C~2rXq      
2017 01  03.36718  05 35 29.261  +06 56 59.96  22.6G 10XE91    F51  C~2rXq      
2017 01  03.37997  05 35 29.196  +06 57 00.35  22.8G 10XE91    F51  C~2rXq      
2017 01  20.39755  05 34 11.965  +07 00 21.02  23.1G 10XE91    F51  C~2rXq      
2017 01  20.42114  05 34 11.857  +07 00 21.64  22.2G 10XE91    F51  C~2rXq      
2017 01  20.43292  05 34 11.808  +07 00 21.79  22.9G 10XE91    F51  C~2rXq      
2017 12  25.42432  05 43 09.440  +07 14 33.37  22.2G 10XE91    F51  C~2rXq      
2017 12  25.43642  05 43 09.371  +07 14 33.35  22.2G 10XE91    F51  C~2rXq      
2017 12  25.44857  05 43 09.309  +07 14 33.47  22.4G 10XE91    F51  C~2rXq      
2017 12  25.46079  05 43 09.247  +07 14 33.42  22.1G 10XE91    F51  C~2rXq      
2018 01  03.47925  05 42 23.197  +07 15 26.54  22.0G 10XE91    F51  C~2rXq      

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    -0.12       0.00    -0.03
  2   0.0000      0.00    -0.08       0.00    -0.10
  3   0.0000      0.00     0.02       0.00    -0.01
  4   0.0082      0.00     0.02       0.00    -0.16
  5   0.0082      0.00     0.06       0.00     0.07
  6   0.0082      0.00     0.17       0.00    -0.04
  7   0.1010      0.00    -0.17       0.00     0.01
  8   0.1010      0.00    -0.11       0.00    -0.07
  9   0.1010      0.00     0.09       0.00     0.00
 10   0.1474      0.00    -0.03       0.00     0.08
 11   0.1474      0.00    -0.11       0.00    -0.10
 12   0.1474      0.00    -0.05       0.00     0.05
 13   0.1584      0.00     0.05       0.00     0.04
 14   0.1584      0.00    -0.03       0.00    -0.05
 15   0.1584      0.00    -0.12       0.00     0.10
 16   2.1570      0.00     0.15       0.00    -0.12
 17   2.1570      0.00    -0.23       0.00    -0.00
 18   2.1570      0.00     0.06       0.00    -0.01
 19   2.1816      0.00    -0.08       0.00    -0.10
 20   2.1816      0.00    -0.17       0.00    -0.09
 21   2.1816      0.00     0.04       0.00    -0.06
 22   3.1374      0.00    -0.02       0.00     0.13
 23   3.1374      0.00    -0.10       0.00     0.05
 24   3.1374      0.00     0.11       0.00    -0.09
 25   3.1647      0.00     0.12       0.00    -0.01
 26   3.1647      0.00     0.03       0.00     0.01
 27   3.1647      0.00     0.09       0.00    -0.15
 28   3.2983      0.00    -0.16       0.00     0.01
 29   3.2984      0.00    -0.12       0.00     0.29
 30   3.2984      0.00     0.14       0.00    -0.15
 31   3.3093      0.00     0.12       0.00     0.16
 32   3.3093      0.00     0.15       0.00     0.04
 33   3.3093      0.00     0.25       0.00     0.09
 34  12.1536      0.00     0.44       0.00    -0.11
 35  12.2001      0.00     0.75       0.00     0.42
 36  12.2026      0.00    -0.27       0.00    -0.36
 37  12.2026      0.00     0.17       0.00    -0.26
 38  12.2026      0.00     0.20       0.00    -0.11
 39  12.2027      0.00     0.13       0.00    -0.05
 40  13.0843      0.00    -0.34       0.00     0.15
 41  13.0843      0.00    -0.05       0.00    -0.04
 42  13.0843      0.00    -0.18       0.00     0.06
 43  13.0844      0.00    -0.06       0.00    -0.12
 44  13.1907      0.00    -0.04       0.00     0.06
 45  13.1908      0.00    -0.01       0.00    -0.00
 46  13.1908      0.00     0.03       0.00     0.01
 47  13.1908      0.00    -0.21       0.00    -0.06
 48  13.2319      0.00     0.27       0.00     0.67
 49  13.2344      0.00    -0.89       0.00     0.20
 50  13.3849      0.00    -0.29       0.00    -0.17
 51  13.3984      0.00    -0.44       0.00    -0.47
 52  14.2096      0.00     0.25       0.00     0.06
 53  14.2503      0.00    -0.25       0.00     0.12
 54  14.2967      0.00    -0.38       0.00    -0.00
 55  14.2967      0.00    -0.02       0.00     0.12
 56  14.2968      0.00    -0.08       0.00     0.41
 57  14.2968      0.00    -0.16       0.00    -0.05
 58  14.3488      0.00    -0.03       0.00    -0.31
 59  15.2196      0.00    -0.26       0.00    -0.01
 60  15.2689      0.00     0.01       0.00    -0.34
 61  15.4355      0.00     0.18       0.00     0.67
 62  15.4355      0.00     0.03       0.00     0.38
 63  15.4356      0.00     0.06       0.00     0.24
 64  16.1181      0.00     0.04       0.00    -0.03
 65  16.2327      0.00     0.09       0.00    -0.15
 66  16.2327      0.00     0.10       0.00     0.11
 67  16.2327      0.00    -0.13       0.00    -0.18
 68  16.3147      0.00     0.18       0.00    -0.03
 69  16.3147      0.00     0.02       0.00     0.05
 70  16.3148      0.00     0.10       0.00    -0.04
 71  16.3148      0.00     0.08       0.00     0.05
 72  16.3201      0.00    -0.07       0.00     0.02
 73  16.3202      0.00    -0.12       0.00     0.11
 74  16.3202      0.00     0.04       0.00    -0.01
 75  16.3202      0.00    -0.02       0.00    -0.08
 76  17.1528      0.00     0.26       0.00    -0.16
 77  17.1991      0.00     0.27       0.00    -0.03
 78  17.2019      0.00    -0.11       0.00    -0.01
 79  17.2019      0.00     0.01       0.00    -0.04
 80  17.2019      0.00    -0.05       0.00    -0.10
 81  17.2020      0.00    -0.05       0.00     0.05
 82  17.3031      0.00     0.05       0.00     0.03
 83  17.3032      0.00    -0.01       0.00     0.06
 84  17.3032      0.00     0.04       0.00    -0.04
 85  17.3032      0.00     0.43       0.00    -0.02
 86  17.3414      0.00     0.00       0.00     0.13
 87  17.3741      0.00    -0.06       0.00     0.03
 88  17.3742      0.00    -0.02       0.00    -0.07
 89  17.3742      0.00     0.02       0.00    -0.01
 90  17.3742      0.00     0.17       0.00     0.12
 91  17.4287      0.00    -0.21       0.00     0.13
 92  17.4287      0.00     0.18       0.00    -0.11
 93  17.4507      0.00     0.11       0.00    -0.02
 94  18.0593      0.00    -0.00       0.00     0.05
 95  18.0593      0.00    -0.19       0.00    -0.07
 96  18.0594      0.00    -0.00       0.00    -0.09
 97  18.0594      0.00    -0.13       0.00     0.09
 98  18.2832      0.00     0.00       0.00     0.01
 99  18.2832      0.00    -0.04       0.00    -0.30
100  18.2832      0.00    -0.05       0.00    -0.01
101  18.3298      0.00     0.07       0.00    -0.24
102  18.3299      0.00    -0.09       0.00     0.02
103  18.3299      0.00    -0.09       0.00    -0.01
104  19.2580      0.00     0.00       0.00     0.03
105  19.2581      0.00    -0.07       0.00    -0.03
106  19.2581      0.00    -0.03       0.00     0.04
107  19.2581      0.00     0.01       0.00    -0.06
108  19.2828      0.00     0.27       0.00    -0.16

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.

10XE91    quality flag:2

Type:       SCATNEAR     3:1EE  SCATNEAR

axisobj        64.153    64.153    64.153
ecceobj         0.468     0.468     0.468
incobj         17.739    17.739    17.739
qmin           33.322    33.412    32.956
qmax           94.181    94.181    94.486
amean          62.315    62.632    62.718
amin           61.320    61.458    61.375
amax           64.190    64.153    64.245
emean           0.445     0.453     0.455
emin            0.423     0.437     0.434
emax            0.468     0.469     0.476
imean          17.541    16.765    16.684
imin           16.182    16.181    15.389
imax           18.972    17.396    18.454
excite_mean     0.537     0.537     0.538
fracstop        1.000     1.000     1.000
cjmean          2.940     2.943     2.942

libcent 0      -180.0     179.5    -180.0
libamp  0      -180.0     172.7    -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       179.6     185.0     186.8
kozaiamp        180.0     180.0     179.9