Orbit Fit and Astrometric record for 15KD173

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: 15KD173   
# Created Tue Nov 30 02:13:24 2021
# Orbit generated from Bernstein formalism
# Fitting     27 observations of     27
# Arc:   2.83y
# First observation: 2014/05/29
#  Last observation: 2017/03/28
Preliminary a, adot, b, bdot, g, gdot:
  -0.000306   0.037979  -0.000006   0.001001   0.031343   0.000000
# Chi-squared of fit:     9.18 DOF:     48 RMS:  0.10
# Min/Max residuals:    -0.25    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.889942E-05  3.745250E-02  5.491684E-07  9.928679E-04  3.180494E-02 -7.115552E-03
# Covariance matrix:
  3.2688E-13 -3.7461E-13  9.2331E-16 -5.1176E-15 -1.3108E-13 -2.4732E-12
 -3.7461E-13  6.5868E-13 -2.6222E-15  1.0240E-14  2.1913E-13  5.4285E-12
  9.2331E-16 -2.6222E-15  2.1050E-13 -1.2626E-13  4.3144E-16 -2.3299E-14
 -5.1176E-15  1.0240E-14 -1.2626E-13  1.0212E-13  7.2961E-15  1.0489E-13
 -1.3108E-13  2.1913E-13  4.3144E-16  7.2961E-15  2.8424E-13  2.4431E-12
 -2.4732E-12  5.4285E-12 -2.3299E-14  1.0489E-13  2.4431E-12  5.3401E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.109960 -128.152713   -0.279619    0.120770   -0.967780  2456806.855568
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:          325.65261 +/-     0.015
Argument of Peri:      133.89241 +/-     0.032
Long of Asc Node:      153.89762 +/-     0.004
Inclination:             7.03776 +/-     0.000
Eccentricity:         0.24888002 +/-    0.0002
Semi-Major Axis:     39.43804204 +/-    0.0050
Time of Perihelion: 2465431.5316 +/-       3.5
Perihelion:          29.62270123 +/-    0.0082
Aphelion:            49.25338284 +/-    0.0097
Period (y)              247.6745 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -19.65799478 +/-    0.0003
Ecliptic Y          -25.47276908 +/-    0.0004
Ecliptic Z            3.89173248 +/-    0.0001
Ecliptic XDOT         0.00291201 +/-    0.0000
Ecliptic YDOT        -0.00150901 +/-    0.0000
Ecliptic ZDOT         0.00000912 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.41055855 +/-    0.0004
Geocenter to KBO     31.44165520 +/-    0.0005
# Hcoef:  9.78

The following table shows the complete astrometric record for 15KD173. 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 (15KD173) followed by the observatory code and reference code for the source of the astrometry.

2014 05  29.35479  15 25 12.031  -11 21 06.59  25.1r 15KD173   568  C~2lVE      
2014 05  29.39367  15 25 11.801  -11 21 05.89  25.4r 15KD173   568  C~2lVE      
2014 05  29.43250  15 25 11.581  -11 21 05.12  24.6r 15KD173   568  C~2lVE      
2014 05  31.37870  15 25 00.503  -11 20 29.58  24.7r 15KD173   568  C~2lVE      
2015 02  25.61255  15 40 03.443  -12 23 24.79  24.8r 15KD173   568  C~2lVE      
2015 03  22.53501  15 39 33.014  -12 16 08.00  24.4r 15KD173   568  C~2lVE      
2015 04  13.54773  15 38 10.086  -12 07 32.15  24.4r 15KD173   568  C~2lVE      
2015 04  13.58882  15 38 09.893  -12 07 31.15  25.1r 15KD173   568  C~2lVE      
2015 05  21.31829  15 34 37.622  -11 52 31.48  24.5r 15KD173   568  C~2lVE      
2015 05  21.35947  15 34 37.365  -11 52 30.79  24.9r 15KD173   568  C~2lVE      
2015 05  21.40058  15 34 37.121  -11 52 29.96  24.6r 15KD173   568  C~2lVE      
2015 05  22.47722  15 34 30.668  -11 52 07.44  24.8r 15KD173   568  C~2lVE      
2015 05  25.46768  15 34 12.823  -11 51 07.86  24.7r 15KD173   568  C~2lVE      
2015 06  20.35717  15 31 51.362  -11 44 39.09  24.9r 15KD173   568  C~2lVE      
2015 07  11.29135  15 30 29.822  -11 42 57.51  25.1r 15KD173   568  C~2lVE      
2015 07  18.36074  15 30 11.708  -11 43 11.94  24.3r 15KD173   568  C~2lVE      
2016 02  06.63317  15 48 03.733  -12 52 52.16  25.8w 15KD173   568  C~2lVE      
2016 02  12.61871  15 48 19.747  -12 52 20.74  24.9w 15KD173   568  C~2lVE      
2016 03  15.62688  15 48 27.769  -12 45 21.18  24.7w 15KD173   568  C~2lVE      
2016 04  03.54663  15 47 34.594  -12 38 42.72  25.0w 15KD173   568  C~2lVE      
2016 04  08.59619  15 47 14.246  -12 36 45.53  25.2w 15KD173   568  C~2lVE      
2016 04  29.50143  15 45 29.295  -12 28 24.91  25.2w 15KD173   568  C~2lVE      
2016 05  04.47406  15 45 00.747  -12 26 27.81  24.7w 15KD173   568  C~2lVE      
2016 05  30.46605  15 42 24.700  -12 17 28.20  24.7w 15KD173   568  C~2lVE      
2016 07  04.31032  15 39 29.313  -12 11 15.89  24.9w 15KD173   568  C~2lVE      
2016 07  05.38268  15 39 25.316  -12 11 12.97  26.0w 15KD173   568  C~2lVE      
2017 03  28.60754  15 56 47.912  -13 07 34.66  25.5w 15KD173   568  C~2lVE      

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   0.0001     -3.45    -0.09      -0.17    -0.04
     3   0.0002     -6.78    -0.00      -0.24     0.02
     4   0.0055   -173.40     0.07      -6.68     0.03
     5   0.7454  13621.43    -0.05    -429.33     0.13
     6   0.8136  13082.14     0.03    -110.50     0.02
     7   0.8739  11773.54     0.09     100.42     0.08
     8   0.8740  11770.54     0.18     100.71     0.07
     9   0.9773   8523.13    -0.09     223.21     0.06
    10   0.9774   8519.30    -0.14     222.96    -0.11
    11   0.9775   8515.62    -0.03     222.90    -0.11
    12   0.9805   8418.10     0.02     221.75     0.23
    13   0.9887   8149.07     0.06     215.92    -0.13
    14   1.0596   6037.39     0.01      86.06    -0.05
    15   1.1169   4850.73     0.09    -109.63     0.07
    16   1.1362   4596.30     0.07    -189.16    -0.12
    17   1.6928  20921.23    -0.23    -503.44     0.07
    18   1.7091  21144.17    -0.07    -418.55     0.11
    19   1.7968  21162.00     0.03      19.03    -0.25
    20   1.8486  20304.43     0.03     228.45    -0.01
    21   1.8624  19984.55     0.23     273.84    -0.05
    22   1.9196  18359.72     0.06     404.62    -0.12
    23   1.9332  17922.45    -0.05     421.04    -0.04
    24   2.0044  15557.76    -0.17     409.16    -0.04
    25   2.0998  12959.36    -0.05     160.81     0.04
    26   2.1027  12901.52     0.00     149.66    -0.08
    27   2.8316  28694.94     0.05     376.56     0.23

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.

15KD173    quality flag:3

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

axisobj        39.229    39.239    39.218
ecceobj         0.249     0.249     0.248
incobj          7.048     7.048     7.048
qmin           28.596    28.587    28.635
qmax           50.805    50.855    50.808
amean          39.455    39.455    39.455
amin           39.062    39.057    39.069
amax           39.919    39.934    39.904
emean           0.244     0.244     0.243
emin            0.209     0.208     0.209
emax            0.274     0.275     0.274
imean           7.165     7.102     7.217
imin            4.799     4.735     4.876
imax            9.892     9.940     9.850
excite_mean     0.275     0.275     0.275
fracstop        1.000     1.000     1.000
cjmean          2.965     2.965     2.965

libcent 0       179.8     179.3     179.6
libamp  0        46.9      53.5      41.7
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        95.5      95.4      95.5
kozaiamp         51.5      52.9      50.4