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 Tue Oct 23 01:08:57 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   57 observations of   57
# Arc:  15.44y
# First observation: 1998/09/22
#  Last observation: 2014/02/28
# Chi-squared of fit:    61.51 DOF:  108 RMS:  0.18
# Min/Max residuals:    -0.44    0.71
# Exact a, adot, b, bdot, g, gdot:
  2.059746E-05  3.780949E-02 -1.113945E-06 -1.823429E-03  2.951208E-02  3.980398E-03
# Covariance matrix:
  1.2377E-13 -2.3687E-14  2.7824E-15  7.7662E-16  5.7269E-14 -4.0771E-14
 -2.3687E-14  3.1244E-14  3.2868E-15 -1.6449E-15  2.5393E-14  5.6233E-14
  2.7824E-15  3.2868E-15  5.7671E-14 -4.9623E-15  9.1268E-15  5.5499E-15
  7.7662E-16 -1.6449E-15 -4.9623E-15  8.4936E-16 -1.6942E-15 -3.0084E-15
  5.7269E-14  2.5393E-14  9.1268E-15 -1.6942E-15  1.1790E-13  3.9073E-14
 -4.0771E-14  5.6233E-14  5.5499E-15 -3.0084E-15  3.9073E-14  1.0435E-13
#      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:            4.94572 +/-     0.001
Argument of Peri:      244.86930 +/-     0.002
Long of Asc Node:      147.41445 +/-     0.000
Inclination:            17.73665 +/-     0.000
Eccentricity:         0.46586518 +/-    0.0000
Semi-Major Axis:     63.90498060 +/-    0.0062
Time of Perihelion: 2448515.0355 +/-       0.6
Perihelion:          34.13387513 +/-    0.0044
Aphelion:            93.67608607 +/-    0.0095
Period (y)              510.8698 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           22.44543560 +/-    0.0003
Ecliptic Y           24.09254908 +/-    0.0003
Ecliptic Z          -10.35924778 +/-    0.0001
Ecliptic XDOT        -0.00242141 +/-    0.0000
Ecliptic YDOT         0.00256439 +/-    0.0000
Ecliptic ZDOT        -0.00027400 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.51895870 +/-    0.0003
Geocenter to KBO     33.88438720 +/-    0.0004
# Hcoef:  6.58

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      
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      
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      

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     0.01
  2   0.0000      0.00    -0.04       0.00    -0.06
  3   0.0000      0.00     0.06       0.00     0.03
  4   0.0082      0.00     0.06       0.00    -0.12
  5   0.0082      0.00     0.10       0.00     0.11
  6   0.0082      0.00     0.21       0.00     0.00
  7   0.1010      0.00    -0.14       0.00     0.04
  8   0.1010      0.00    -0.07       0.00    -0.04
  9   0.1010      0.00     0.12       0.00     0.04
 10   0.1474      0.00    -0.00       0.00     0.11
 11   0.1474      0.00    -0.08       0.00    -0.07
 12   0.1474      0.00    -0.02       0.00     0.08
 13   0.1584      0.00     0.08       0.00     0.07
 14   0.1584      0.00    -0.00       0.00    -0.02
 15   0.1584      0.00    -0.10       0.00     0.13
 16   2.1570      0.00     0.12       0.00    -0.12
 17   2.1570      0.00    -0.26       0.00    -0.00
 18   2.1570      0.00     0.02       0.00    -0.01
 19   2.1816      0.00    -0.12       0.00    -0.10
 20   2.1816      0.00    -0.20       0.00    -0.09
 21   2.1816      0.00     0.00       0.00    -0.06
 22   3.1374      0.00    -0.06       0.00     0.12
 23   3.1374      0.00    -0.15       0.00     0.04
 24   3.1374      0.00     0.06       0.00    -0.10
 25   3.1647      0.00     0.06       0.00    -0.02
 26   3.1647      0.00    -0.02       0.00    -0.01
 27   3.1647      0.00     0.04       0.00    -0.17
 28   3.2983      0.00    -0.22       0.00    -0.01
 29   3.2984      0.00    -0.19       0.00     0.28
 30   3.2984      0.00     0.07       0.00    -0.16
 31   3.3093      0.00     0.05       0.00     0.14
 32   3.3093      0.00     0.08       0.00     0.02
 33   3.3093      0.00     0.18       0.00     0.08
 34  12.1536      0.00     0.41       0.00    -0.19
 35  12.2001      0.00     0.71       0.00     0.34
 36  12.2026      0.00    -0.31       0.00    -0.44
 37  12.2026      0.00     0.13       0.00    -0.35
 38  12.2026      0.00     0.16       0.00    -0.20
 39  12.2027      0.00     0.09       0.00    -0.14
 40  13.0843      0.00    -0.33       0.00     0.07
 41  13.0843      0.00    -0.04       0.00    -0.12
 42  13.0843      0.00    -0.17       0.00    -0.02
 43  13.0844      0.00    -0.05       0.00    -0.20
 44  13.1907      0.00    -0.05       0.00    -0.03
 45  13.1908      0.00    -0.01       0.00    -0.09
 46  13.1908      0.00     0.02       0.00    -0.08
 47  13.1908      0.00    -0.22       0.00    -0.15
 48  13.2319      0.00     0.26       0.00     0.58
 49  14.2503      0.00    -0.24       0.00     0.03
 50  14.2967      0.00    -0.38       0.00    -0.09
 51  14.2967      0.00    -0.02       0.00     0.03
 52  14.2968      0.00    -0.08       0.00     0.32
 53  14.2968      0.00    -0.16       0.00    -0.14
 54  14.3488      0.00    -0.04       0.00    -0.39
 55  15.4355      0.00     0.20       0.00     0.59
 56  15.4355      0.00     0.05       0.00     0.30
 57  15.4356      0.00     0.08       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:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        64.156    64.156    64.156
ecceobj         0.468     0.468     0.468
incobj         17.739    17.739    17.739
qmin           32.968    32.236    32.874
qmax           94.350    95.143   100.535
amean          62.689    62.431    63.777
amin           61.412    61.252    61.367
amax           64.192    64.321    67.362
emean           0.451     0.456     0.464
emin            0.421     0.430     0.431
emax            0.475     0.481     0.500
imean          16.973    16.608    16.686
imin           15.362    14.736    15.518
imax           18.668    18.349    18.063
excite_mean     0.537     0.538     0.546
fracstop        1.000     1.000     1.000
cjmean          2.943     2.938     2.941

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       189.0     184.2     196.3
kozaiamp        179.8     180.0     180.0