Orbit Fit and Astrometric record for 15KW173

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: 15KW173   
# Created Fri Dec  3 02:13:22 2021
# Orbit generated from Bernstein formalism
# Fitting     38 observations of     39
# Arc:   3.24y
# First observation: 2014/05/30
#  Last observation: 2017/08/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000116   0.033260  -0.000058  -0.011035   0.030287   0.000000
# Chi-squared of fit:    17.19 DOF:     70 RMS:  0.12
# Min/Max residuals:    -0.33    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.766563E-05  3.381693E-02 -5.801661E-06 -1.124270E-02  3.078535E-02  4.372405E-03
# Covariance matrix:
  1.6152E-13 -1.8021E-13 -1.8277E-14  4.2235E-14 -4.4473E-14 -1.2437E-12
 -1.8021E-13  3.6609E-13  4.6154E-14 -1.0841E-13  7.0693E-14  3.1898E-12
 -1.8277E-14  4.6154E-14  1.1737E-13 -7.0164E-14  1.3227E-14  4.5574E-13
  4.2235E-14 -1.0841E-13 -7.0164E-14  7.8239E-14 -2.5610E-14 -1.0678E-12
 -4.4473E-14  7.0693E-14  1.3227E-14 -2.5610E-14  1.4916E-13  7.6127E-13
 -1.2437E-12  3.1898E-12  4.5574E-13 -1.0678E-12  7.6127E-13  3.1422E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.800073 -125.820531   -0.256856    0.116295   -0.974829  2456807.894078
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:           33.12137 +/-     0.016
Argument of Peri:      111.13511 +/-     0.030
Long of Asc Node:       73.62308 +/-     0.000
Inclination:            19.56274 +/-     0.000
Eccentricity:         0.20031908 +/-    0.0002
Semi-Major Axis:     39.45788928 +/-    0.0039
Time of Perihelion: 2448471.2675 +/-       4.0
Perihelion:          31.55372130 +/-    0.0067
Aphelion:            47.36205725 +/-    0.0076
Period (y)              247.8614 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -19.24454681 +/-    0.0002
Ecliptic Y          -27.09858494 +/-    0.0003
Ecliptic Z            3.84602824 +/-    0.0000
Ecliptic XDOT         0.00213810 +/-    0.0000
Ecliptic YDOT        -0.00217283 +/-    0.0000
Ecliptic ZDOT        -0.00094665 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.45859861 +/-    0.0003
Geocenter to KBO     32.48298484 +/-    0.0004
# Hcoef:  9.44

The following table shows the complete astrometric record for 15KW173. 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 (15KW173) followed by the observatory code and reference code for the source of the astrometry.

2014 05  30.39330  15 34 03.815  -12 13 05.60  24.4r 15KW173   568  C~2lVH      
2014 05  31.43190  15 33 57.797  -12 12 54.40  24.3r 15KW173   568  C~2lVH      
2014 06  01.32025  15 33 52.683  -12 12 44.71  24.7r 15KW173   568  C~2lVH      
2014 06  01.36329  15 33 52.402  -12 12 43.78  23.6r 15KW173   568  C~2lVH      
2014 06  01.40622  15 33 52.161  -12 12 43.68  25.2r 15KW173   568  C~2lVH      
2014 06  22.31762  15 32 02.098  -12 10 21.56  24.6r 15KW173   568  C~2lVH      
2014 06  22.36048  15 32 01.901  -12 10 21.27  24.1r 15KW173   568  C~2lVH      
2014 07  19.33364  15 30 27.896  -12 11 51.93  24.3r 15KW173   568  C~2lVH      
2015 02  23.64017  15 47 24.664  -13 38 10.37  25.6r 15KW173   568  C~2lVH      
2015 03  19.59955  15 47 03.058  -13 35 06.42  24.3r 15KW173   568  C~2lVH      
2015 03  22.52231  15 46 55.863  -13 34 32.08  24.7r 15KW173   568  C~2lVH      
2015 04  12.51679  15 45 39.236  -13 29 35.37  24.3r 15KW173   568  C~2lVH      
2015 04  12.55771  15 45 39.031  -13 29 34.34  25.1r 15KW173   568  C~2lVH      
2015 04  18.53999  15 45 10.391  -13 27 59.77  25.1r 15KW173   568  C~2lVH      
2015 05  17.41261  15 42 27.083  -13 20 29.32  24.6r 15KW173   568  C~2lVH      
2015 05  17.50638  15 42 26.504  -13 20 27.71  24.6r 15KW173   568  C~2lVH      
2015 05  24.39782  15 41 45.091  -13 18 55.74  24.7r 15KW173   568  C~2lVH      
2015 05  24.44391  15 41 44.808  -13 18 55.25  24.4r 15KW173   568  C~2lVH      
2015 05  24.48500  15 41 44.555  -13 18 54.71  24.2r 15KW173   568  C~2lVH      
2015 05  26.47305  15 41 32.688  -13 18 30.24  24.4r 15KW173   568  C~2lVH      
2015 06  18.36794  15 39 24.684  -13 15 08.55  25.1r 15KW173   568  C~2lVH      
2015 06  18.40888  15 39 24.489  -13 15 08.52  24.9r 15KW173   568  C~2lVH      
2015 07  10.41926  15 37 51.417  -13 14 54.55  25.1r 15KW173   568  C~2lVH      
2015 07  18.34401  15 37 28.418  -13 15 39.81  24.2r 15KW173   568  C~2lVH      
2016 02  12.63894  15 54 02.376  -14 39 03.65  24.9w 15KW173   568  C~2lVH      
2016 03  17.62205  15 54 04.361  -14 37 00.57  24.8w 15KW173   568  C~2lVH      
2016 04  03.58308  15 53 15.362  -14 33 52.16  25.4w 15KW173   568  C~2lVH      
2016 04  09.57657  15 52 51.324  -14 32 32.26  24.6w 15KW173   568  C~2lVH      
2016 04  29.52576  15 51 12.020  -14 27 43.83  24.9w 15KW173   568  C~2lVH      
2016 05  04.49833  15 50 43.842  -14 26 30.99  25.1w 15KW173   568  C~2lVH      
2016 05  30.44581  15 48 09.232  -14 20 53.72  24.7w 15KW173   568  C~2lVH      
2016 07  04.32652  15 45 10.907  -14 17 42.96        15KW173   568  C~2lVH      
2016 07  05.39888  15 45 06.703  -14 17 43.94  24.6w 15KW173   568  C~2lVH      
2017 03  30.58668  16 00 31.192  -15 35 23.30  25.0w 15KW173   568  C~2lVH      
2017 05  21.54752  15 56 09.016  -15 24 31.23  25.4w 15KW173   568  C~2lVH      
2017 05  21.56169  15 56 08.929  -15 24 31.15  25.9w 15KW173   568  C~2lVH      
2017 05  24.52991  15 55 51.003  -15 23 56.53  24.8w 15KW173   568  C~2lVH      
2017 05  25.53328  15 55 44.955  -15 23 45.12  25.0w 15KW173   568  C~2lVH      
2017 08  24.25065  15 50 55.192  -15 27 23.90  24.7w 15KW173   568  C~2lVH      

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    -0.06       0.00     0.01
     2   0.0028    -88.35     0.19     -10.14    -0.21
     3   0.0053   -163.48     0.19     -18.60    -0.05
     4   0.0054   -167.70    -0.33     -18.68     0.32
     5   0.0055   -171.15    -0.10     -19.42     0.01
     6   0.0628  -1772.06     0.08    -267.42    -0.05
     7   0.0629  -1774.93     0.13    -267.83     0.14
     8   0.1367  -3091.08     0.02    -687.65     0.11
     9   0.7372  12588.76     0.01   -2252.38     0.22
    10   0.8028  12239.07     0.08   -2143.95    -0.01
    11   0.8108  12128.72     0.03   -2134.14    -0.03
    12   0.8682  10969.37     0.12   -2098.01    -0.23
    13   0.8683  10966.22    -0.16   -2097.69     0.10
    14   0.8847  10536.71 (   0.43)  -2100.52 (  -0.21)
    15   0.9638   8108.91    -0.06   -2207.32    -0.11
    16   0.9640   8100.30    -0.19   -2207.70     0.15
    17   0.9829   7490.02    -0.03   -2257.55     0.10
    18   0.9830   7485.89    -0.04   -2258.03     0.00
    19   0.9831   7482.16    -0.08   -2258.36     0.01
    20   0.9886   7307.74     0.04   -2274.56    -0.08
    21   1.0513   5441.39     0.00   -2512.09    -0.15
    22   1.0514   5438.62     0.27   -2512.72    -0.27
    23   1.1116   4113.36    -0.07   -2816.96    -0.07
    24   1.1333   3797.45    -0.10   -2939.81    -0.05
    25   1.7064  19081.18    -0.03   -4541.67    -0.04
    26   1.7994  19082.29     0.17   -4414.67     0.10
    27   1.8458  18340.77    -0.04   -4385.67    -0.15
    28   1.8622  17979.89    -0.01   -4383.98     0.09
    29   1.9169  16499.11     0.09   -4419.54     0.02
    30   1.9305  16081.18    -0.05   -4438.94    -0.08
    31   2.0015  13803.91    -0.04   -4610.20    -0.01
    32   2.0970  11226.17     0.07   -5009.01     0.11
    33   2.0999  11166.70    -0.17   -5023.85    -0.02
    34   2.8342  25384.21    -0.01   -6655.79     0.12
    35   2.9765  21491.31    -0.07   -6821.77     0.02
    36   2.9765  21490.05    -0.05   -6821.96    -0.08
    37   2.9846  21226.56    -0.02   -6843.83    -0.06
    38   2.9874  21137.74     0.08   -6851.49    -0.02
    39   3.2357  17061.56     0.13   -7980.54     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.

15KW173    quality flag:3

Type:           3:2E      3:2E      3:2E
Type:                              6:4II

axisobj        39.184    39.197    39.172
ecceobj         0.194     0.195     0.194
incobj         19.570    19.570    19.570
qmin           26.813    26.819    26.773
qmax           52.458    52.485    52.549
amean          39.454    39.454    39.454
amin           39.101    39.073    39.088
amax           39.910    39.916    39.909
emean           0.259     0.259     0.259
emin            0.182     0.182     0.182
emax            0.318     0.318     0.319
imean          15.108    15.147    15.074
imin           11.849    11.920    11.802
imax           18.699    18.693    18.705
excite_mean     0.371     0.371     0.371
fracstop        1.000     1.000     1.000
cjmean          2.895     2.895     2.895

libcent 0       180.4     181.0     179.9
libamp  0        35.1      41.3      31.0
libcent 1      -180.0    -180.0     173.7
libamp  1      -180.0    -180.0     172.7
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        89.4      89.5      89.3
kozaiamp         67.7      67.5      67.9