Orbit Fit and Astrometric record for 15KE173

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: 15KE173   
# Created Fri Mar 29 01:17:58 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     36 observations of     36
# Arc:   7.91y
# First observation: 2014/05/30
#  Last observation: 2022/04/26
# Chi-squared of fit:    10.91 DOF:     66 RMS:  0.10
# Min/Max residuals:    -0.21    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.382595E-05  2.064866E-02 -6.869084E-07 -1.621308E-03  2.358577E-02 -5.118528E-03
# Covariance matrix:
  1.4579E-13 -1.1696E-13 -5.6514E-15  7.2110E-15 -1.0428E-14 -5.3743E-13
 -1.1696E-13  1.4935E-13  6.6399E-15 -9.7479E-15 -2.7357E-14  7.2979E-13
 -5.6514E-15  6.6399E-15  6.8681E-14 -1.9129E-14  2.5155E-15  3.7077E-14
  7.2110E-15 -9.7479E-15 -1.9129E-14  1.3194E-14  1.0450E-15 -5.2374E-14
 -1.0428E-14 -2.7357E-14  2.5155E-15  1.0450E-15  1.3675E-13 -8.8854E-14
 -5.3743E-13  7.2979E-13  3.7077E-14 -5.2374E-14 -8.8854E-14  3.9164E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.875640 -126.166674   -0.262847    0.117391   -0.973100  2456807.897968
# Heliocentric elements and errors
Epoch:              2456808.5000  =  2014/05/31
Mean Anomaly:          259.03899 +/-     0.017
Argument of Peri:      250.99521 +/-     0.010
Long of Asc Node:      109.79099 +/-     0.002
Inclination:             8.12665 +/-     0.000
Eccentricity:         0.25268389 +/-    0.0001
Semi-Major Axis:     39.30530503 +/-    0.0022
Time of Perihelion: 2482050.6504 +/-       6.8
Perihelion:          29.37348774 +/-    0.0037
Aphelion:            49.23712231 +/-    0.0043
Period (y)              246.4251 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -25.20850607 +/-    0.0004
Ecliptic Y          -34.92719207 +/-    0.0005
Ecliptic Z            5.07575077 +/-    0.0001
Ecliptic XDOT         0.00226460 +/-    0.0000
Ecliptic YDOT        -0.00096012 +/-    0.0000
Ecliptic ZDOT        -0.00025785 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.37225965 +/-    0.0005
Geocenter to KBO     42.39863223 +/-    0.0007
# Hcoef:  7.99

The following table shows the complete astrometric record for 15KE173. 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 (15KE173) followed by the observatory code and reference code for the source of the astrometry.

2014 05  30.39719  15 32 46.328  -12 03 45.60  24.6r 15KE173   568  C~2lVE      
2014 05  31.43190  15 32 41.592  -12 03 31.67  24.5r 15KE173   568  C~2lVE      
2014 06  01.32413  15 32 37.556  -12 03 20.59  24.4r 15KE173   568  C~2lVE      
2014 06  01.36716  15 32 37.357  -12 03 20.16  24.2r 15KE173   568  C~2lVE      
2014 06  01.41010  15 32 37.169  -12 03 19.76  23.6r 15KE173   568  C~2lVE      
2014 06  22.32150  15 31 10.262  -11 59 56.67  24.1r 15KE173   568  C~2lVE      
2014 06  22.36436  15 31 10.107  -11 59 56.58  24.0r 15KE173   568  C~2lVE      
2014 07  19.33752  15 29 54.635  -11 59 09.47  24.4r 15KE173   568  C~2lVE      
2015 02  25.61666  15 42 32.148  -12 50 09.25  24.4r 15KE173   568  C~2lVE      
2015 03  19.62043  15 42 09.778  -12 45 50.09  24.0r 15KE173   568  C~2lVE      
2015 03  22.53917  15 42 03.609  -12 45 07.33  24.1r 15KE173   568  C~2lVE      
2015 04  13.55184  15 40 56.473  -12 39 04.41  24.5r 15KE173   568  C~2lVE      
2015 04  13.59295  15 40 56.314  -12 39 03.65  24.1r 15KE173   568  C~2lVE      
2015 04  18.55634  15 40 36.942  -12 37 36.11  24.3r 15KE173   568  C~2lVE      
2015 05  21.32236  15 38 08.334  -12 28 22.32  24.4r 15KE173   568  C~2lVE      
2015 05  21.36353  15 38 08.131  -12 28 21.83  24.0r 15KE173   568  C~2lVE      
2015 05  21.40471  15 38 07.925  -12 28 21.29  24.4r 15KE173   568  C~2lVE      
2015 05  22.48134  15 38 02.827  -12 28 05.14  24.4r 15KE173   568  C~2lVE      
2015 05  25.47177  15 37 48.670  -12 27 21.90  24.0r 15KE173   568  C~2lVE      
2015 06  20.36123  15 35 55.178  -12 22 38.27  24.1r 15KE173   568  C~2lVE      
2015 06  20.40209  15 35 55.017  -12 22 38.02  24.1r 15KE173   568  C~2lVE      
2015 06  23.42230  15 35 43.531  -12 22 17.51  24.5r 15KE173   568  C~2lVE      
2015 07  11.29546  15 34 46.995  -12 21 18.83  24.6r 15KE173   568  C~2lVE      
2016 02  06.63317  15 46 50.850  -13 13 32.88  24.6w 15KE173   568  C~2lVE      
2016 02  12.61871  15 47 00.893  -13 13 14.29  24.8w 15KE173   568  C~2lVE      
2016 03  15.62688  15 46 56.481  -13 08 27.97  24.8w 15KE173   568  C~2lVE      
2016 04  03.55069  15 46 10.883  -13 03 46.24  24.6w 15KE173   568  C~2lVE      
2016 04  08.60024  15 45 54.169  -13 02 22.49  23.9w 15KE173   568  C~2lVE      
2016 04  29.50143  15 44 29.942  -12 56 23.84  24.6w 15KE173   568  C~2lVE      
2016 05  04.47406  15 44 07.303  -12 54 59.56  24.7w 15KE173   568  C~2lVE      
2016 05  30.46201  15 42 04.044  -12 48 27.60  24.2w 15KE173   568  C~2lVE      
2016 07  04.29818  15 39 43.734  -12 43 48.91  24.8w 15KE173   568  C~2lVE      
2016 07  05.36646  15 39 40.454  -12 43 46.33  25.0w 15KE173   568  C~2lVE      
2017 03  30.57261  15 51 09.376  -13 26 48.70  24.4w 15KE173   568  C~2lVE      
2022 04  26.371650 16 14 29.144  -15 08 00.59  24.4G 15KE173   G37  C~5ZbU      
2022 04  26.420220 16 14 28.943  -15 07 59.64        15KE173   G37  C~5ZbU      

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    -0.02       0.00    -0.08
     2   0.0028      0.00    -0.13       0.00     0.38
     3   0.0053      0.00     0.02       0.00     0.07
     4   0.0054      0.00     0.01       0.00    -0.05
     5   0.0055      0.00     0.16       0.00    -0.19
     6   0.0628      0.00     0.02       0.00     0.08
     7   0.0629      0.00     0.11       0.00    -0.11
     8   0.1367      0.00     0.02       0.00    -0.05
     9   0.7426      0.00    -0.13       0.00    -0.07
    10   0.8028      0.00    -0.08       0.00     0.13
    11   0.8108      0.00     0.08       0.00     0.09
    12   0.8711      0.00     0.06       0.00     0.05
    13   0.8712      0.00     0.05       0.00     0.08
    14   0.8848      0.00    -0.09       0.00    -0.03
    15   0.9745      0.00    -0.04       0.00     0.05
    16   0.9746      0.00    -0.10       0.00    -0.07
    17   0.9747      0.00    -0.21       0.00    -0.15
    18   0.9776      0.00     0.12       0.00     0.02
    19   0.9858      0.00     0.02       0.00     0.05
    20   1.0567      0.00     0.01       0.00     0.04
    21   1.0568      0.00     0.02       0.00    -0.01
    22   1.0651      0.00    -0.06       0.00    -0.01
    23   1.1140      0.00    -0.00       0.00     0.04
    24   1.6899      0.00     0.13       0.00    -0.10
    25   1.7063      0.00     0.13       0.00     0.00
    26   1.7939      0.00    -0.01       0.00    -0.01
    27   1.8457      0.00     0.08       0.00     0.03
    28   1.8596      0.00    -0.06       0.00     0.21
    29   1.9168      0.00    -0.09       0.00    -0.04
    30   1.9304      0.00    -0.01       0.00    -0.12
    31   2.0015      0.00    -0.09       0.00    -0.17
    32   2.0969      0.00     0.03       0.00    -0.02
    33   2.0998      0.00    -0.01       0.00     0.01
    34   2.8342      0.00    -0.01       0.00    -0.06
    35   7.9068      0.00    -0.05       0.00    -0.10
    36   7.9070      0.00     0.06       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.

15KE173    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.164    39.164    39.165
ecceobj         0.258     0.258     0.258
incobj          8.120     8.120     8.120
qmin           28.907    28.919    28.905
qmax           50.627    50.620    50.633
amean          39.455    39.455    39.455
amin           39.000    38.998    38.999
amax           39.995    39.999    39.998
emean           0.241     0.241     0.241
emin            0.203     0.203     0.203
emax            0.267     0.267     0.267
imean           7.358     7.359     7.357
imin            5.637     5.634     5.629
imax            9.956     9.956     9.957
excite_mean     0.274     0.274     0.274
fracstop        1.000     1.000     1.000
cjmean          2.966     2.966     2.966

libcent 0       180.7     180.6     180.9
libamp  0        82.5      82.3      81.8
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       239.7     239.8     239.7
kozaiamp         73.2      73.2      73.2