Orbit Fit and Astrometric record for 15KG173

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: 15KG173   
# Created Wed Dec  8 02:13:24 2021
# Orbit generated from Bernstein formalism
# Fitting     39 observations of     39
# Arc:   3.24y
# First observation: 2014/05/30
#  Last observation: 2017/08/27
Preliminary a, adot, b, bdot, g, gdot:
   0.000177   0.044288   0.000009   0.002636   0.035069   0.000000
# Chi-squared of fit:     7.12 DOF:     72 RMS:  0.08
# Min/Max residuals:    -0.23    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.978795E-05  4.443717E-02  1.346059E-06  2.625200E-03  3.487105E-02 -6.531632E-03
# Covariance matrix:
  1.3629E-13 -1.5983E-13  1.1734E-15 -5.0360E-15 -3.9911E-14 -8.7340E-13
 -1.5983E-13  3.5396E-13 -3.2643E-15  1.3255E-14  7.7864E-14  2.4586E-12
  1.1734E-15 -3.2643E-15  9.5026E-14 -4.8128E-14 -8.9414E-16 -2.5556E-14
 -5.0360E-15  1.3255E-14 -4.8128E-14  4.0774E-14  5.9139E-15  1.0325E-13
 -3.9911E-14  7.7864E-14 -8.9414E-16  5.9139E-15  1.2163E-13  5.8643E-13
 -8.7340E-13  2.4586E-12 -2.5556E-14  1.0325E-13  5.8643E-13  1.9268E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.566008 -126.361983   -0.265926    0.112036   -0.972891  2456807.882338
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:          339.68164 +/-     0.011
Argument of Peri:       99.30087 +/-     0.022
Long of Asc Node:      171.55369 +/-     0.002
Inclination:             7.14430 +/-     0.000
Eccentricity:         0.28058234 +/-    0.0001
Semi-Major Axis:     39.44200785 +/-    0.0025
Time of Perihelion: 2461906.9975 +/-       2.7
Perihelion:          28.37527683 +/-    0.0032
Aphelion:            50.50873886 +/-    0.0041
Period (y)              247.7118 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -17.25853198 +/-    0.0002
Ecliptic Y          -23.88662953 +/-    0.0002
Ecliptic Z            3.27925890 +/-    0.0000
Ecliptic XDOT         0.00312035 +/-    0.0000
Ecliptic YDOT        -0.00164293 +/-    0.0000
Ecliptic ZDOT         0.00014625 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.65099552 +/-    0.0002
Geocenter to KBO     28.67708413 +/-    0.0003
# Hcoef:  9.51

The following table shows the complete astrometric record for 15KG173. 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 (15KG173) followed by the observatory code and reference code for the source of the astrometry.

2014 05  30.38156  15 31 41.802  -12 18 59.41  23.9r 15KG173   568  C~2lVF      
2014 05  30.43011  15 31 41.492  -12 18 58.44  24.5r 15KG173   568  C~2lVF      
2014 05  30.43466  15 31 41.463  -12 18 58.17  25.2r 15KG173   568  C~2lVF      
2014 05  31.42022  15 31 35.383  -12 18 38.28  24.7r 15KG173   568  C~2lVF      
2014 06  01.30833  15 31 29.926  -12 18 20.37  24.4r 15KG173   568  C~2lVF      
2014 06  01.35165  15 31 29.647  -12 18 19.62  24.2r 15KG173   568  C~2lVF      
2014 06  01.39455  15 31 29.391  -12 18 18.88  24.0r 15KG173   568  C~2lVF      
2014 06  22.30598  15 29 33.178  -12 12 54.54        15KG173   568  C~2lVF      
2014 06  22.34880  15 29 32.997  -12 12 54.07  24.0r 15KG173   568  C~2lVF      
2014 07  19.32186  15 27 58.073  -12 11 10.83  24.9r 15KG173   568  C~2lVF      
2015 02  25.63010  15 48 34.840  -13 22 01.76  24.4r 15KG173   568  C~2lVF      
2015 03  19.62451  15 48 18.558  -13 15 45.52  24.5r 15KG173   568  C~2lVF      
2015 03  22.54324  15 48 11.623  -13 14 43.05  24.5r 15KG173   568  C~2lVF      
2015 04  13.55598  15 46 48.106  -13 05 50.37  24.2r 15KG173   568  C~2lVF      
2015 04  13.59705  15 46 47.894  -13 05 49.26  23.9r 15KG173   568  C~2lVF      
2015 04  18.56046  15 46 22.588  -13 03 39.76  23.9r 15KG173   568  C~2lVF      
2015 05  21.32647  15 43 02.368  -12 49 52.09  24.1r 15KG173   568  C~2lVF      
2015 05  21.36772  15 43 02.098  -12 49 51.16  24.3r 15KG173   568  C~2lVF      
2015 05  21.40894  15 43 01.821  -12 49 50.19  24.0r 15KG173   568  C~2lVF      
2015 05  22.48541  15 42 54.841  -12 49 26.09  24.2r 15KG173   568  C~2lVF      
2015 06  20.36530  15 40 00.756  -12 41 00.90  24.1r 15KG173   568  C~2lVF      
2015 06  20.40617  15 40 00.538  -12 41 00.42  24.3r 15KG173   568  C~2lVF      
2015 06  23.42643  15 39 45.022  -12 40 27.14  24.5r 15KG173   568  C~2lVF      
2015 07  11.29956  15 38 29.924  -12 38 41.02  24.1r 15KG173   568  C~2lVF      
2015 07  11.30916  15 38 29.892  -12 38 41.01  24.3r 15KG173   568  C~2lVF      
2015 07  18.36957  15 38 09.356  -12 38 43.83  24.0r 15KG173   568  C~2lVF      
2016 04  03.57902  15 57 56.833  -13 35 07.22  22.9w 15KG173   568  C~2lVF      
2016 04  08.62857  15 57 36.387  -13 33 06.61  24.3w 15KG173   568  C~2lVF      
2016 04  09.57252  15 57 32.272  -13 32 43.55  24.6w 15KG173   568  C~2lVF      
2016 04  29.52172  15 55 47.706  -13 24 25.63  24.3w 15KG173   568  C~2lVF      
2016 05  04.49428  15 55 17.525  -13 22 22.53  23.8w 15KG173   568  C~2lVF      
2016 05  30.43368  15 52 30.074  -13 12 45.04  24.4w 15KG173   568  C~2lVF      
2016 07  04.32248  15 49 16.037  -13 05 33.45  24.4w 15KG173   568  C~2lVF      
2016 07  05.39482  15 49 11.528  -13 05 28.74  24.4w 15KG173   568  C~2lVF      
2017 01  31.65347  16 07 55.460  -14 12 44.12  24.8w 15KG173   568  C~2lVF      
2017 03  30.59606  16 08 46.918  -14 00 38.77  24.3w 15KG173   568  C~2lVF      
2017 08  25.24527  15 58 31.039  -13 37 13.89  24.4w 15KG173   568  C~2lVF      
2017 08  27.23687  15 58 34.982  -13 37 51.93  24.1w 15KG173   568  C~2lVF      
2017 08  27.26102  15 58 35.025  -13 37 52.38  24.2w 15KG173   568  C~2lVF      

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    -0.03
     2   0.0001     -4.64     0.04      -0.16    -0.07
     3   0.0001     -5.12    -0.01       0.00     0.10
     4   0.0028    -96.39     0.16      -2.21     0.00
     5   0.0053   -178.32    -0.05      -4.14     0.11
     6   0.0054   -182.47    -0.14      -4.40    -0.02
     7   0.0055   -186.29     0.06      -4.59    -0.08
     8   0.0628  -1917.59    -0.23    -102.93    -0.05
     9   0.0629  -1920.28     0.21    -103.12     0.07
    10   0.1367  -3295.33    -0.03    -342.65     0.01
    11   0.7426  15316.80     0.02    -218.08    -0.03
    12   0.8029  14998.67    -0.15      95.68    -0.12
    13   0.8108  14885.33     0.00     133.77    -0.06
    14   0.8711  13570.33     0.06     376.71     0.02
    15   0.8712  13567.05    -0.04     377.09     0.04
    16   0.8848  13175.91     0.10     419.14     0.08
    17   0.9745  10127.40    -0.02     553.55     0.02
    18   0.9746  10123.33     0.01     553.55     0.03
    19   0.9747  10119.15    -0.06     553.55     0.05
    20   0.9777  10014.01     0.09     553.41    -0.03
    21   1.0568   7414.81    -0.02     452.65     0.01
    22   1.0569   7411.59     0.00     452.37     0.01
    23   1.0651   7182.76    -0.04     431.60     0.05
    24   1.1141   6088.31    -0.04     276.82     0.03
    25   1.1141   6087.85    -0.03     276.72     0.03
    26   1.1334   5796.14    -0.13     203.21    -0.00
    27   1.8459  23559.21     0.11     832.39     0.07
    28   1.8597  23237.96     0.07     885.84    -0.10
    29   1.8623  23173.58    -0.10     895.39    -0.03
    30   1.9169  21557.70     0.02    1049.80     0.00
    31   1.9305  21096.14     0.01    1073.54    -0.12
    32   2.0015  18561.23     0.03    1097.32    -0.06
    33   2.0970  15682.43     0.02     883.44    -0.04
    34   2.1000  15616.81     0.03     873.17    -0.10
    35   2.6756  32724.47    -0.05     465.96     0.06
    36   2.8343  33323.12    -0.07    1340.99     0.05
    37   3.2385  24080.35     0.08     816.48    -0.11
    38   3.2440  24145.56     0.03     791.59     0.11
    39   3.2440  24146.28    -0.05     791.28     0.11

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.

15KG173    quality flag:3

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

axisobj        39.214    39.220    39.208
ecceobj         0.279     0.279     0.279
incobj          7.162     7.162     7.162
qmin           27.658    27.809    27.812
qmax           51.581    51.636    51.364
amean          39.454    39.455    39.455
amin           39.073    39.081    39.070
amax           39.924    39.936    39.914
emean           0.255     0.241     0.254
emin            0.183     0.177     0.192
emax            0.297     0.294     0.292
imean           9.841    10.732    10.154
imin            6.554     6.554     6.554
imax           14.138    14.025    13.978
excite_mean     0.310     0.308     0.312
fracstop        1.000     1.000     1.000
cjmean          2.942     2.943     2.940

libcent 0       178.6     178.7     179.9
libamp  0        47.5      49.1      42.4
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        96.6     162.4     116.1
kozaiamp         81.8     179.9      70.8