Orbit Fit and Astrometric record for 15KT173

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: 15KT173   
# Created Thu Apr 18 01:10:33 2019
# Orbit generated from Bernstein formalism
# Fitting   41 observations of   41
# Arc:   2.98y
# First observation: 2014/05/29
#  Last observation: 2017/05/21
Preliminary a, adot, b, bdot, g, gdot:
  -0.000354   0.037055   0.000014  -0.001558   0.030995   0.000000
# Chi-squared of fit:    11.85 DOF:   76 RMS:  0.10
# Min/Max residuals:    -0.30    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.820070E-05  3.650258E-02 -7.042584E-07 -1.538351E-03  3.135760E-02 -7.042036E-03
# Covariance matrix:
  1.6593E-13 -1.9299E-13 -2.5961E-15  5.5867E-15 -4.5581E-14 -1.2402E-12
 -1.9299E-13  3.6578E-13  6.1093E-15 -1.3836E-14  9.5030E-14  3.0466E-12
 -2.5961E-15  6.1093E-15  1.1611E-13 -7.0428E-14  4.0934E-15  6.4488E-14
  5.5867E-15 -1.3836E-14 -7.0428E-14  6.1928E-14 -4.3981E-15 -1.3856E-13
 -4.5581E-14  9.5030E-14  4.0934E-15 -4.3981E-15  1.5016E-13  1.1361E-12
 -1.2402E-12  3.0466E-12  6.4488E-14 -1.3856E-13  1.1361E-12  3.0768E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.392762 -128.935415   -0.293045    0.108207   -0.965293  2456806.863358
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:          324.00441 +/-     0.012
Argument of Peri:      169.19449 +/-     0.025
Long of Asc Node:      119.48293 +/-     0.003
Inclination:             6.69132 +/-     0.000
Eccentricity:         0.24458304 +/-    0.0001
Semi-Major Axis:     39.57271235 +/-    0.0037
Time of Perihelion: 2465892.0706 +/-       2.7
Perihelion:          29.89389788 +/-    0.0063
Aphelion:            49.25152682 +/-    0.0073
Period (y)              248.9442 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -20.30044839 +/-    0.0002
Ecliptic Y          -25.58996532 +/-    0.0003
Ecliptic Z            3.55079740 +/-    0.0000
Ecliptic XDOT         0.00284841 +/-    0.0000
Ecliptic YDOT        -0.00154287 +/-    0.0000
Ecliptic ZDOT        -0.00020181 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.85669935 +/-    0.0003
Geocenter to KBO     31.89019632 +/-    0.0004
# Hcoef:  9.39

The following table shows the complete astrometric record for 15KT173. 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 (15KT173) followed by the observatory code and reference code for the source of the astrometry.

2014 05  29.36258  15 21 23.331  -11 50 56.46  24.0r 15KT173   568  C~2lVG      
2014 05  29.40143  15 21 23.107  -11 50 55.78  24.4r 15KT173   568  C~2lVG      
2014 05  29.44026  15 21 22.887  -11 50 54.96  24.4r 15KT173   568  C~2lVG      
2014 05  30.47018  15 21 17.063  -11 50 37.28  24.6r 15KT173   568  C~2lVG      
2014 05  31.38647  15 21 11.906  -11 50 21.79  23.9r 15KT173   568  C~2lVG      
2014 06  21.36572  15 19 25.954  -11 45 51.76  24.9r 15KT173   568  C~2lVG      
2014 06  21.40460  15 19 25.771  -11 45 51.43  24.5r 15KT173   568  C~2lVG      
2014 07  19.28215  15 17 58.708  -11 45 03.44  24.7r 15KT173   568  C~2lVG      
2015 02  23.64434  15 35 57.597  -12 58 47.34  24.4r 15KT173   568  C~2lVG      
2015 03  19.58718  15 35 31.918  -12 53 08.23  24.5r 15KT173   568  C~2lVG      
2015 03  21.64578  15 35 26.582  -12 52 30.53  24.3r 15KT173   568  C~2lVG      
2015 04  12.50451  15 34 04.341  -12 44 50.68  24.3r 15KT173   568  C~2lVG      
2015 04  12.54547  15 34 04.134  -12 44 49.88  24.2r 15KT173   568  C~2lVG      
2015 04  18.52716  15 33 34.756  -12 42 33.02  24.2r 15KT173   568  C~2lVH      
2015 05  17.40013  15 30 50.316  -12 31 47.28  24.5r 15KT173   568  C~2lVH      
2015 05  17.44183  15 30 50.060  -12 31 46.50  23.7r 15KT173   568  C~2lVH      
2015 05  17.49383  15 30 49.742  -12 31 45.44  24.0r 15KT173   568  C~2lVH      
2015 05  24.38557  15 30 08.727  -12 29 29.80  24.0r 15KT173   568  C~2lVH      
2015 05  24.43166  15 30 08.451  -12 29 28.93  24.0r 15KT173   568  C~2lVH      
2015 05  24.47270  15 30 08.198  -12 29 28.21  24.4r 15KT173   568  C~2lVH      
2015 05  26.46061  15 29 56.497  -12 28 51.47  24.1r 15KT173   568  C~2lVH      
2015 06  18.35975  15 27 52.342  -12 23 21.44  24.4r 15KT173   568  C~2lVH      
2015 06  18.40072  15 27 52.138  -12 23 20.94  24.5r 15KT173   568  C~2lVH      
2015 06  21.37538  15 27 38.169  -12 22 52.77  24.3r 15KT173   568  C~2lVH      
2015 06  21.39181  15 27 38.089  -12 22 52.59  24.6r 15KT173   568  C~2lVH      
2015 07  10.41105  15 26 25.934  -12 21 27.59  24.6r 15KT173   568  C~2lVH      
2015 07  18.33583  15 26 06.054  -12 21 43.00  24.4r 15KT173   568  C~2lVH      
2015 08  11.33392  15 25 48.783  -12 25 35.48  24.4r 15KT173   568  C~2lVH      
2016 02  06.62103  15 43 41.959  -13 35 10.68  24.6w 15KT173   568  C~2lVH      
2016 02  12.60657  15 43 56.754  -13 34 56.56  25.1w 15KT173   568  C~2lVH      
2016 03  15.60417  15 43 59.213  -13 29 28.27  25.4w 15KT173   568  C~2lVH      
2016 03  15.61316  15 43 59.206  -13 29 28.17  24.6w 15KT173   568  C~2lVH      
2016 04  08.59215  15 42 42.956  -13 21 53.62  24.9w 15KT173   568  C~2lVH      
2016 04  29.47374  15 40 57.159  -13 14 16.65  24.7w 15KT173   568  C~2lVH      
2016 05  04.40882  15 40 28.798  -13 12 28.92  24.5w 15KT173   568  C~2lVH      
2016 05  30.48224  15 37 53.093  -13 04 01.08        15KT173   568  C~2lVH      
2016 07  04.28603  15 35 01.050  -12 58 05.54  23.7w 15KT173   568  C~2lVH      
2016 07  05.35431  15 34 57.182  -12 58 02.62  24.8w 15KT173   568  C~2lVH      
2016 07  05.37863  15 34 57.084  -12 58 02.29  25.5w 15KT173   568  C~2lVH      
2017 03  30.57261  15 51 51.078  -14 00 06.60  24.9w 15KT173   568  C~2lVH      
2017 05  21.53337  15 47 22.622  -13 42 39.59  24.4w 15KT173   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     0.04       0.00    -0.01
  2   0.0001     -3.35     0.05      -0.18    -0.01
  3   0.0002     -6.69     0.07      -0.21     0.13
  4   0.0030    -93.86     0.04      -4.96    -0.09
  5   0.0055   -171.02    -0.28      -9.34    -0.30
  6   0.0630  -1743.98     0.09    -147.13    -0.03
  7   0.0631  -1746.66    -0.04    -147.51    -0.07
  8   0.1394  -2994.55     0.08    -430.70     0.02
  9   0.7400  13436.25     0.13    -755.98    -0.00
 10   0.8055  12987.97    -0.08    -517.45     0.10
 11   0.8112  12902.79     0.01    -499.77    -0.16
 12   0.8710  11619.61    -0.04    -346.13     0.27
 13   0.8711  11616.47    -0.15    -346.09     0.11
 14   0.8875  11164.84    -0.03    -318.30     0.04
 15   0.9666   8667.16     0.12    -283.72     0.04
 16   0.9667   8663.33     0.11    -283.89    -0.04
 17   0.9668   8658.55     0.09    -284.01    -0.05
 18   0.9857   8042.03     0.02    -301.12     0.10
 19   0.9858   8037.90     0.04    -301.28     0.11
 20   0.9859   8034.12    -0.03    -301.50     0.03
 21   0.9914   7858.74    -0.07    -308.35    -0.01
 22   1.0541   6013.07     0.03    -441.09    -0.10
 23   1.0542   6010.05    -0.03    -441.36    -0.03
 24   1.0623   5804.68     0.01    -465.20     0.09
 25   1.0624   5803.50    -0.04    -465.32     0.11
 26   1.1144   4758.01     0.02    -647.80     0.06
 27   1.1361   4479.79    -0.18    -735.88    -0.06
 28   1.2018   4293.25    -0.11   -1024.56     0.03
 29   1.6927  20589.55     0.06   -1263.19    -0.05
 30   1.7091  20798.01     0.03   -1198.61    -0.06
 31   1.7967  20755.40    -0.20    -869.39     0.03
 32   1.7967  20755.28    -0.03    -869.31     0.02
 33   1.8624  19555.72     0.00    -687.94     0.00
 34   1.9195  17933.76     0.12    -608.76     0.01
 35   1.9330  17502.73     0.13    -602.47     0.12
 36   2.0044  15158.20    -0.04    -653.16    -0.05
 37   2.0997  12621.02     0.08    -916.18    -0.13
 38   2.1026  12565.26     0.11    -927.10    -0.17
 39   2.1027  12563.78    -0.08    -927.13     0.06
 40   2.8370  27969.26    -0.02   -1076.85     0.03
 41   2.9792  23859.69    -0.03    -949.92    -0.08

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.

15KT173    quality flag:3

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

axisobj        39.360    39.368    39.352
ecceobj         0.245     0.245     0.244
incobj          6.688     6.688     6.688
qmin           28.983    29.043    29.004
qmax           50.626    50.572    50.580
amean          39.456    39.456    39.456
amin           38.953    38.924    38.953
amax           40.066    40.081    40.041
emean           0.247     0.247     0.247
emin            0.231     0.231     0.230
emax            0.266     0.264     0.265
imean           4.922     5.007     4.924
imin            4.079     4.702     3.831
imax            5.825     5.343     5.714
excite_mean     0.262     0.262     0.262
fracstop        1.000     1.000     1.000
cjmean          2.973     2.973     2.973

libcent 0       179.9     179.3     179.8
libamp  0       107.0     121.1     103.8
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       220.0     165.0     216.5
kozaiamp        179.8     179.9     180.0