Orbit Fit and Astrometric record for 15KX173

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: 15KX173   
# Created Fri Feb 22 02:10:24 2019
# Orbit generated from Bernstein formalism
# Fitting   36 observations of   36
# Arc:   3.24y
# First observation: 2014/05/30
#  Last observation: 2017/08/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000044   0.024088   0.000007  -0.005924   0.024449   0.000000
# Chi-squared of fit:    11.62 DOF:   66 RMS:  0.10
# Min/Max residuals:    -0.22    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.497877E-05  2.398063E-02 -3.739368E-06 -5.906633E-03  2.447687E-02 -5.302409E-03
# Covariance matrix:
  1.7826E-13 -1.9694E-13 -1.7563E-14  3.6031E-14 -6.0147E-14 -1.9070E-12
 -1.9694E-13  3.8196E-13  4.3377E-14 -9.0298E-14  1.1095E-13  4.7495E-12
 -1.7563E-14  4.3377E-14  1.2856E-13 -7.5819E-14  1.5945E-14  6.2097E-13
  3.6031E-14 -9.0298E-14 -7.5819E-14  7.4453E-14 -2.9390E-14 -1.2912E-12
 -6.0147E-14  1.1095E-13  1.5945E-14 -2.9390E-14  1.4997E-13  1.6304E-12
 -1.9070E-12  4.7495E-12  6.2097E-13 -1.2912E-12  1.6304E-12  6.7949E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    7.164561 -126.214112   -0.263659    0.122269   -0.972279  2456807.897968
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:          313.66025 +/-     0.015
Argument of Peri:      223.09055 +/-     0.036
Long of Asc Node:       80.32024 +/-     0.001
Inclination:            15.54903 +/-     0.000
Eccentricity:         0.23618098 +/-    0.0003
Semi-Major Axis:     47.85684209 +/-    0.0081
Time of Perihelion: 2472366.0944 +/-       3.0
Perihelion:          36.55396641 +/-    0.0171
Aphelion:            59.15971777 +/-    0.0188
Period (y)              331.0734 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -24.31636740 +/-    0.0004
Ecliptic Y          -33.64992330 +/-    0.0005
Ecliptic Z            5.09531334 +/-    0.0001
Ecliptic XDOT         0.00245789 +/-    0.0000
Ecliptic YDOT        -0.00118008 +/-    0.0000
Ecliptic ZDOT        -0.00072937 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.82780510 +/-    0.0005
Geocenter to KBO     40.85489789 +/-    0.0006
# Hcoef:  8.41

The following table shows the complete astrometric record for 15KX173. 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 (15KX173) followed by the observatory code and reference code for the source of the astrometry.

2014 05  30.39719  15 32 52.129  -11 46 15.21  23.9r 15KX173   568  C~2lVH      
2014 06  01.32413  15 32 43.129  -11 45 54.70  24.5r 15KX173   568  C~2lVH      
2014 06  01.36716  15 32 42.931  -11 45 54.30  24.4r 15KX173   568  C~2lVH      
2014 06  01.41010  15 32 42.718  -11 45 53.92  24.6r 15KX173   568  C~2lVH      
2014 06  22.32150  15 31 13.816  -11 43 23.07  24.3r 15KX173   568  C~2lVH      
2014 06  22.36436  15 31 13.622  -11 43 22.61  24.4r 15KX173   568  C~2lVH      
2014 07  19.33752  15 29 56.877  -11 43 53.40  24.6r 15KX173   568  C~2lVH      
2015 02  25.61666  15 43 14.555  -12 46 28.99  24.6r 15KX173   568  C~2lVH      
2015 03  22.53917  15 42 46.777  -12 42 20.58  24.5r 15KX173   568  C~2lVH      
2015 04  13.55184  15 41 38.662  -12 37 02.21  24.5r 15KX173   568  C~2lVH      
2015 04  13.59295  15 41 38.501  -12 37 01.56  24.2r 15KX173   568  C~2lVH      
2015 04  18.55633  15 41 18.729  -12 35 44.05  24.3r 15KX173   568  C~2lVH      
2015 05  21.32236  15 38 46.545  -12 27 38.37  24.6r 15KX173   568  C~2lVH      
2015 05  21.36353  15 38 46.322  -12 27 37.79  24.2r 15KX173   568  C~2lVH      
2015 05  21.40471  15 38 46.129  -12 27 37.39  25.3r 15KX173   568  C~2lVH      
2015 05  22.48134  15 38 40.862  -12 27 23.68  24.4r 15KX173   568  C~2lVH      
2015 05  25.47177  15 38 26.344  -12 26 46.91  24.4r 15KX173   568  C~2lVH      
2015 06  20.36123  15 36 29.903  -12 23 03.05  24.9r 15KX173   568  C~2lVH      
2015 06  20.40209  15 36 29.733  -12 23 02.89  21.9r 15KX173   568  C~2lVH      
2015 06  23.42230  15 36 17.968  -12 22 49.72  24.9r 15KX173   568  C~2lVH      
2015 07  11.29546  15 35 20.146  -12 22 36.69  24.8r 15KX173   568  C~2lVH      
2015 07  18.36550  15 35 03.714  -12 23 03.66  24.8r 15KX173   568  C~2lVH      
2016 02  06.63721  15 48 02.615  -13 25 46.92  24.7w 15KX173   568  C~2lVH      
2016 03  15.63093  15 48 11.803  -13 22 23.43  24.0w 15KX173   568  C~2lVH      
2016 03  15.63618  15 48 11.798  -13 22 23.27  24.6w 15KX173   568  C~2lVH      
2016 04  03.55069  15 47 26.045  -13 18 28.09  24.8w 15KX173   568  C~2lVH      
2016 04  08.60024  15 47 09.093  -13 17 16.53  24.7w 15KX173   568  C~2lVH      
2016 04  29.50143  15 45 43.142  -13 12 05.95  24.9w 15KX173   568  C~2lVH      
2016 05  04.47406  15 45 19.949  -13 10 52.89  25.0w 15KX173   568  C~2lVH      
2016 05  30.46201  15 43 13.412  -13 05 18.67  24.5w 15KX173   568  C~2lVH      
2016 07  04.29818  15 40 49.184  -13 01 58.66  24.9w 15KX173   568  C~2lVH      
2016 07  05.36646  15 40 45.827  -13 01 58.70  25.1w 15KX173   568  C~2lVH      
2017 03  30.57261  15 52 58.154  -13 58 25.37  25.2w 15KX173   568  C~2lVH      
2017 05  21.53337  15 49 18.541  -13 46 39.40  24.5w 15KX173   568  C~2lVH      
2017 08  19.27489  15 45 01.774  -13 46 59.43  24.8w 15KX173   568  C~2lVH      
2017 08  26.26334  15 45 09.033  -13 48 50.59  24.8w 15KX173   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     0.11       0.00    -0.02
  2   0.0053   -133.22    -0.07     -11.83     0.01
  3   0.0054   -136.14     0.02     -12.14    -0.01
  4   0.0055   -139.27    -0.10     -12.52    -0.11
  5   0.0628  -1442.81     0.27    -180.54    -0.04
  6   0.0629  -1445.68    -0.22    -180.78     0.15
  7   0.1367  -2531.97    -0.11    -483.48    -0.04
  8   0.7426   9724.58     0.01   -1365.24     0.20
  9   0.8108   9270.80     0.04   -1217.17    -0.17
 10   0.8711   8225.38    -0.08   -1138.21    -0.05
 11   0.8712   8222.93    -0.07   -1138.12    -0.04
 12   0.8848   7922.95    -0.22   -1129.94    -0.18
 13   0.9745   5640.22     0.32   -1178.20     0.05
 14   0.9746   5636.91     0.03   -1178.40     0.04
 15   0.9747   5634.07     0.22   -1178.68    -0.04
 16   0.9776   5555.80     0.01   -1183.46    -0.03
 17   0.9858   5340.31     0.01   -1197.68     0.07
 18   1.0567   3629.05     0.00   -1382.59     0.06
 19   1.0568   3626.59    -0.04   -1383.03     0.00
 20   1.0651   3455.96    -0.03   -1411.07     0.07
 21   1.1140   2629.73     0.06   -1599.55     0.24
 22   1.1334   2402.28    -0.02   -1683.04     0.12
 23   1.6899  14376.88    -0.00   -2703.57     0.05
 24   1.7939  14461.83    -0.06   -2474.49    -0.15
 25   1.7939  14461.72    -0.02   -2474.35    -0.03
 26   1.8457  13754.67    -0.02   -2395.89     0.00
 27   1.8596  13496.29    -0.06   -2382.18    -0.02
 28   1.9168  12198.45     0.04   -2364.87    -0.04
 29   1.9304  11850.81     0.05   -2371.01    -0.12
 30   2.0015   9969.70    -0.03   -2469.72    -0.08
 31   2.0969   7869.23    -0.09   -2763.22     0.03
 32   2.0998   7821.46     0.03   -2774.68    -0.05
 33   2.8342  19044.36     0.09   -3655.98     0.06
 34   2.9764  15745.53     0.04   -3678.02     0.05
 35   3.2221  12089.96    -0.11   -4545.18    -0.07
 36   3.2412  12218.85     0.02   -4629.49     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.

15KX173    quality flag:3

Type:           2:1E      2:1E      2:1E

axisobj        47.612    47.632    47.592
ecceobj         0.238     0.238     0.237
incobj         15.555    15.556    15.555
qmin           35.654    35.682    35.545
qmax           60.992    60.946    60.905
amean          47.796    47.796    47.795
amin           47.163    47.157    47.181
amax           48.532    48.538    48.514
emean           0.233     0.233     0.238
emin            0.209     0.210     0.216
emax            0.257     0.256     0.257
imean          14.311    14.265    14.345
imin           13.778    13.565    13.950
imax           14.980    14.893    14.954
excite_mean     0.339     0.339     0.343
fracstop        1.000     1.000     1.000
cjmean          3.005     3.005     3.001

libcent 0       179.6     180.2     179.1
libamp  0       152.7     154.5     151.5
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       189.2     185.1     192.8
kozaiamp        180.0     179.9     180.0