Orbit Fit and Astrometric record for 15KE172

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: 15KE172   
# Created Tue Nov 30 02:13:24 2021
# Orbit generated from Bernstein formalism
# Fitting     36 observations of     36
# Arc:   3.25y
# First observation: 2014/05/30
#  Last observation: 2017/08/31
Preliminary a, adot, b, bdot, g, gdot:
   0.000022   0.022081   0.000037   0.017216   0.022916   0.000000
# Chi-squared of fit:     9.17 DOF:     66 RMS:  0.09
# Min/Max residuals:    -0.29    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.564502E-05  2.219699E-02  1.112362E-05  1.732572E-02  2.313414E-02 -1.119666E-03
# Covariance matrix:
  1.8791E-13 -1.8720E-13  3.8043E-14 -8.5410E-14 -6.2172E-14 -1.7643E-12
 -1.8720E-13  3.2097E-13 -8.7571E-14  1.9483E-13  9.0266E-14  4.0492E-12
  3.8043E-14 -8.7571E-14  1.6469E-13 -1.4047E-13 -3.2535E-14 -1.3597E-12
 -8.5410E-14  1.9483E-13 -1.4047E-13  2.0568E-13  7.6460E-14  3.0295E-12
 -6.2172E-14  9.0266E-14 -3.2535E-14  7.6460E-14  1.5497E-13  1.5318E-12
 -1.7643E-12  4.0492E-12 -1.3597E-12  3.0295E-12  1.5318E-12  6.2901E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.382603 -124.792069   -0.239401    0.109679   -0.980028  2456807.906448
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:          359.21153 +/-     0.006
Argument of Peri:       15.16775 +/-     0.041
Long of Asc Node:      227.58040 +/-     0.000
Inclination:            38.37828 +/-     0.000
Eccentricity:         0.65984454 +/-    0.0001
Semi-Major Axis:    129.75662436 +/-    0.0324
Time of Perihelion: 2457982.9243 +/-       9.4
Perihelion:          44.13742377 +/-    0.0152
Aphelion:           215.37582496 +/-    0.0548
Period (y)             1478.0956 +/-      0.55
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -24.87930488 +/-    0.0004
Ecliptic Y          -36.22349222 +/-    0.0006
Ecliptic Z            4.80586983 +/-    0.0001
Ecliptic XDOT         0.00235727 +/-    0.0000
Ecliptic YDOT        -0.00120724 +/-    0.0000
Ecliptic ZDOT         0.00202313 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.20653328 +/-    0.0005
Geocenter to KBO     43.22616735 +/-    0.0007
# Hcoef:  8.08

The following table shows the complete astrometric record for 15KE172. 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 (15KE172) followed by the observatory code and reference code for the source of the astrometry.

2014 05  30.40567  15 37 43.770  -12 51 52.42  24.8r 15KE172   568  C~2csK      
2014 06  01.33220  15 37 35.550  -12 51 08.67  24.8r 15KE172   568  C~2csK      
2014 06  01.37504  15 37 35.355  -12 51 07.76  24.1r 15KE172   568  C~2csK      
2014 06  01.41793  15 37 35.181  -12 51 06.91  24.3r 15KE172   568  C~2csK      
2014 06  22.32930  15 36 13.682  -12 44 11.96  24.4r 15KE172   568  C~2csK      
2014 06  22.37222  15 36 13.527  -12 44 11.21  24.6r 15KE172   568  C~2csK      
2015 02  25.63010  15 48 17.119  -12 50 27.07  24.7r 15KE172   568  C~2csK      
2015 03  19.62451  15 48 02.966  -12 42 32.92  24.4r 15KE172   568  C~2csK      
2015 03  22.54324  15 47 57.913  -12 41 21.81  24.9r 15KE172   568  C~2csK      
2015 04  13.55598  15 46 59.469  -12 31 46.75  24.5r 15KE172   568  C~2csK      
2015 04  13.59705  15 46 59.325  -12 31 45.70  24.4r 15KE172   568  C~2csK      
2015 04  18.56046  15 46 41.895  -12 29 30.35  24.4r 15KE172   568  C~2csK      
2015 05  21.32647  15 44 25.335  -12 15 05.29  24.7r 15KE172   568  C~2csK      
2015 05  21.36772  15 44 25.171  -12 15 04.28  24.6r 15KE172   568  C~2csK      
2015 05  21.40894  15 44 24.984  -12 15 03.37  24.2r 15KE172   568  C~2csK      
2015 05  22.48541  15 44 20.217  -12 14 37.16  24.1r 15KE172   568  C~2csK      
2015 05  25.47599  15 44 07.055  -12 13 25.64  24.4r 15KE172   568  C~2csK      
2015 06  20.36530  15 42 21.024  -12 04 37.45  24.5r 15KE172   568  C~2csK      
2015 06  20.40617  15 42 20.872  -12 04 36.75  24.7r 15KE172   568  C~2csK      
2015 06  23.42643  15 42 10.137  -12 03 47.84  24.1r 15KE172   568  C~2csK      
2015 07  12.30961  15 41 14.968  -11 59 50.11  24.2r 15KE172   568  C~2csK      
2015 07  18.39769  15 41 02.325  -11 59 00.03  24.1r 15KE172   568  C~2csK      
2016 02  06.64531  15 53 43.487  -12 15 15.77  24.9w 15KE172   568  C~2csK      
2016 02  12.63086  15 53 55.464  -12 13 49.01  25.0w 15KE172   568  C~2csK      
2016 03  15.64429  15 54 03.112  -12 03 01.12  25.0w 15KE172   568  C~2csK      
2016 04  03.55878  15 53 25.594  -11 54 54.93  25.0w 15KE172   568  C~2csK      
2016 04  08.60833  15 53 11.092  -11 52 37.95  25.0w 15KE172   568  C~2csK      
2016 04  09.55226  15 53 08.202  -11 52 12.17  24.8w 15KE172   568  C~2csK      
2016 04  29.50547  15 51 55.863  -11 43 05.84  24.7w 15KE172   568  C~2csK      
2016 05  04.47810  15 51 35.275  -11 40 52.60  24.7w 15KE172   568  C~2csK      
2016 05  30.45392  15 49 41.897  -11 30 16.37  24.6w 15KE172   568  C~2csK      
2016 07  04.31437  15 47 30.994  -11 20 34.07  23.9w 15KE172   568  C~2csK      
2016 07  05.38672  15 47 27.914  -11 20 22.56  24.8w 15KE172   568  C~2csK      
2017 03  28.61692  15 59 36.512  -11 16 15.69  25.6w 15KE172   568  C~2csK      
2017 05  21.55221  15 56 20.806  -10 52 15.06  24.1w 15KE172   568  C~2csK      
2017 08  31.26147  15 52 43.483  -10 39 26.60        15KE172   568  C~2csK      

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    -0.10       0.00     0.15
     2   0.0053   -127.09     0.02      14.55     0.01
     3   0.0054   -130.08    -0.11      14.77    -0.07
     4   0.0055   -132.75     0.09      15.01    -0.15
     5   0.0628  -1388.85     0.09     140.01     0.01
     6   0.0629  -1391.23     0.03     140.21     0.02
     7   0.7426   9005.19     0.03    2194.76     0.02
     8   0.8028   8697.16     0.05    2611.17     0.10
     9   0.8108   8609.07    -0.07    2664.02     0.05
    10   0.8710   7645.11     0.14    3033.24     0.02
    11   0.8712   7642.82     0.13    3033.79    -0.05
    12   0.8847   7363.34    -0.12    3108.43     0.08
    13   0.9745   5216.76    -0.21    3499.68    -0.02
    14   0.9746   5214.19     0.09    3500.12     0.05
    15   0.9747   5211.31     0.09    3500.38    -0.04
    16   0.9776   5137.25    -0.04    3510.06    -0.03
    17   0.9858   4932.97     0.01    3535.92     0.01
    18   1.0567   3297.82    -0.09    3695.91    -0.04
    19   1.0568   3295.48    -0.09    3696.08    -0.03
    20   1.0651   3130.94     0.10    3707.67    -0.13
    21   1.1168   2288.36    -0.00    3753.51     0.02
    22   1.1334   2096.26    -0.07    3759.62     0.03
    23   1.6899  13215.51     0.03    5315.15     0.20
    24   1.7063  13368.73     0.09    5438.56    -0.22
    25   1.7939  13337.50    -0.29    6097.18     0.11
    26   1.8457  12691.67    -0.04    6451.97    -0.14
    27   1.8596  12453.10     0.05    6539.12     0.01
    28   1.8621  12405.88     0.07    6555.00     0.03
    29   1.9168  11245.60     0.08    6854.74     0.06
    30   1.9304  10920.22     0.01    6918.01    -0.03
    31   2.0015   9149.77     0.02    7169.12    -0.14
    32   2.0969   7139.45     0.04    7306.26     0.10
    33   2.0999   7092.64    -0.02    7307.30     0.02
    34   2.8288  17547.68    -0.05    9915.09    -0.04
    35   2.9764  14403.25     0.06   10701.09    -0.05
    36   3.2549  11093.25    -0.01   10747.26     0.09

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.

15KE172    quality flag:2

Type:     9:1EEEEEEE9:1EEEEEEE  SCATNEAR

axisobj       127.948   128.042   127.854
ecceobj         0.655     0.656     0.655
incobj         38.460    38.460    38.460
qmin           42.375    43.184    40.911
qmax          225.526   223.217   225.612
amean         130.276   130.276   130.231
amin          127.562   127.819   127.308
amax          134.569   133.803   134.339
emean           0.664     0.649     0.667
emin            0.653     0.629     0.653
emax            0.676     0.669     0.685
imean          38.943    40.127    38.650
imin           38.430    38.690    37.518
imax           39.637    41.495    39.633
excite_mean     0.914     0.914     0.914
fracstop        1.000     1.000     1.000
cjmean          2.652     2.652     2.652

libcent 0       174.8     271.0    -180.0
libamp  0       163.3      58.5    -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        34.5      17.9      40.6
kozaiamp         18.9       3.8      27.7