Orbit Fit and Astrometric record for 15KO173

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: 15KO173   
# Created Fri Feb 22 02:10:24 2019
# Orbit generated from Bernstein formalism
# Fitting   45 observations of   45
# Arc:   3.24y
# First observation: 2014/05/29
#  Last observation: 2017/08/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000142   0.038047  -0.000052  -0.007817   0.032095   0.000000
# Chi-squared of fit:     9.69 DOF:   84 RMS:  0.08
# Min/Max residuals:    -0.23    0.40
# Exact a, adot, b, bdot, g, gdot:
  1.870010E-05  3.854056E-02 -3.565379E-06 -7.945579E-03  3.236507E-02  7.017650E-04
# Covariance matrix:
  1.6124E-13 -1.8320E-13 -1.3253E-14  2.7650E-14 -5.4472E-14 -1.1250E-12
 -1.8320E-13  3.3412E-13  2.9202E-14 -6.1780E-14  8.5362E-14  2.4985E-12
 -1.3253E-14  2.9202E-14  1.0282E-13 -5.7945E-14  9.7287E-15  2.4883E-13
  2.7650E-14 -6.1780E-14 -5.7945E-14  5.3148E-14 -1.8159E-14 -5.2521E-13
 -5.4472E-14  8.5362E-14  9.7287E-15 -1.8159E-14  1.2701E-13  7.7683E-13
 -1.1250E-12  2.4985E-12  2.4883E-13 -5.2521E-13  7.7683E-13  2.1262E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.006710 -127.177040   -0.262842    0.102602   -0.974552  2456806.847808
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:            6.59012 +/-     0.026
Argument of Peri:      143.33840 +/-     0.040
Long of Asc Node:       79.36977 +/-     0.001
Inclination:            13.06033 +/-     0.000
Eccentricity:         0.19467458 +/-    0.0001
Semi-Major Axis:     39.47997415 +/-    0.0023
Time of Perihelion: 2455141.8513 +/-       6.6
Perihelion:          31.79422675 +/-    0.0028
Aphelion:            47.16572155 +/-    0.0035
Period (y)              248.0696 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -18.95233558 +/-    0.0002
Ecliptic Y          -25.42125792 +/-    0.0003
Ecliptic Z            3.23321370 +/-    0.0000
Ecliptic XDOT         0.00251424 +/-    0.0000
Ecliptic YDOT        -0.00207682 +/-    0.0000
Ecliptic ZDOT        -0.00066211 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.87295168 +/-    0.0002
Geocenter to KBO     30.89750325 +/-    0.0003
# Hcoef:  8.89

The following table shows the complete astrometric record for 15KO173. 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 (15KO173) followed by the observatory code and reference code for the source of the astrometry.

2014 05  29.34703  15 27 55.136  -12 39 40.80  24.0r 15KO173   568  C~2lVG      
2014 05  29.38590  15 27 54.898  -12 39 40.12  23.7r 15KO173   568  C~2lVG      
2014 05  29.42474  15 27 54.662  -12 39 39.67  24.0r 15KO173   568  C~2lVG      
2014 05  30.44923  15 27 48.606  -12 39 24.90  23.8r 15KO173   568  C~2lVG      
2014 05  30.45456  15 27 48.546  -12 39 24.75  23.6r 15KO173   568  C~2lVG      
2014 05  31.37090  15 27 43.140  -12 39 11.97  23.9r 15KO173   568  C~2lVG      
2014 06  21.35020  15 25 50.717  -12 35 41.51  23.9r 15KO173   568  C~2lVG      
2014 06  21.38905  15 25 50.525  -12 35 41.29  24.0r 15KO173   568  C~2lVG      
2015 02  20.66080  15 42 37.443  -14 02 16.84  24.3r 15KO173   568  C~2lVG      
2015 03  19.57486  15 42 17.165  -13 58 28.61  24.0r 15KO173   568  C~2lVG      
2015 03  21.63357  15 42 11.961  -13 58 00.95  24.0r 15KO173   568  C~2lVG      
2015 04  12.49220  15 40 49.686  -13 52 07.00  24.0r 15KO173   568  C~2lVG      
2015 04  12.53320  15 40 49.474  -13 52 06.25  23.7r 15KO173   568  C~2lVG      
2015 04  18.51488  15 40 19.641  -13 50 16.48  23.6r 15KO173   568  C~2lVG      
2015 05  17.38763  15 37 30.535  -13 41 26.64  23.6r 15KO173   568  C~2lVG      
2015 05  17.42929  15 37 30.265  -13 41 25.86  23.6r 15KO173   568  C~2lVG      
2015 05  17.47149  15 37 29.993  -13 41 25.08  23.3r 15KO173   568  C~2lVG      
2015 05  17.47632  15 37 29.967  -13 41 25.17  23.6r 15KO173   568  C~2lVG      
2015 05  24.36911  15 36 47.321  -13 39 33.00  23.8r 15KO173   568  C~2lVG      
2015 05  24.41533  15 36 47.031  -13 39 32.29  23.6r 15KO173   568  C~2lVG      
2015 05  24.45620  15 36 46.775  -13 39 31.57  23.8r 15KO173   568  C~2lVG      
2015 05  26.44379  15 36 34.586  -13 39 01.43  23.5r 15KO173   568  C~2lVG      
2015 06  18.34328  15 34 24.086  -13 34 35.78  23.8r 15KO173   568  C~2lVG      
2015 06  18.38434  15 34 23.882  -13 34 35.52  23.6r 15KO173   568  C~2lVG      
2015 06  21.35896  15 34 09.033  -13 34 14.53  24.0r 15KO173   568  C~2lVG      
2015 07  10.39102  15 32 51.237  -13 33 28.86  24.0r 15KO173   568  C~2lVG      
2015 07  17.34619  15 32 31.482  -13 33 52.87  23.8r 15KO173   568  C~2lVG      
2015 07  18.31678  15 32 29.154  -13 33 58.03  23.7r 15KO173   568  C~2lVG      
2016 02  06.64126  15 50 17.713  -14 56 53.20  24.1w 15KO173   568  C~2lVG      
2016 02  12.62680  15 50 33.803  -14 57 12.44  24.3w 15KO173   568  C~2lVG      
2016 03  15.64024  15 50 41.253  -14 54 48.43  23.3w 15KO173   568  C~2lVG      
2016 04  03.56687  15 49 46.762  -14 50 45.27  24.2w 15KO173   568  C~2lVG      
2016 04  08.61643  15 49 25.936  -14 49 27.34  24.2w 15KO173   568  C~2lVG      
2016 04  09.56037  15 49 21.787  -14 49 12.18  23.9w 15KO173   568  C~2lVG      
2016 04  29.52981  15 47 38.517  -14 43 33.32  23.9w 15KO173   568  C~2lVG      
2016 05  04.50238  15 47 09.277  -14 42 07.03  23.9w 15KO173   568  C~2lVG      
2016 05  30.44581  15 44 29.472  -14 35 18.82  24.0w 15KO173   568  C~2lVG      
2016 07  04.29413  15 41 28.013  -14 30 42.31  24.0w 15KO173   568  C~2lVG      
2016 07  05.36242  15 41 23.845  -14 30 40.99  24.1w 15KO173   568  C~2lVG      
2017 04  03.61140  15 58 11.286  -15 45 41.61  24.5w 15KO173   568  C~2lVG      
2017 04  03.61609  15 58 11.270  -15 45 41.53  24.2w 15KO173   568  C~2lVG      
2017 04  04.49990  15 58 07.989  -15 45 29.86  24.2w 15KO173   568  C~2lVG      
2017 05  21.53807  15 53 53.541  -15 33 33.72  23.1w 15KO173   568  C~2lVG      
2017 08  20.28063  15 48 33.676  -15 32 29.22  23.9w 15KO173   568  C~2lVG      
2017 08  24.25065  15 48 39.262  -15 33 39.25  24.6w 15KO173   568  C~2lVG      

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     0.03       0.00    -0.07
  2   0.0001     -3.54    -0.03      -0.20     0.04
  3   0.0002     -7.00    -0.01      -0.61    -0.07
  4   0.0030    -96.54     0.40      -8.14     0.14
  5   0.0030    -97.43    -0.01      -8.21     0.11
  6   0.0055   -177.26    -0.06     -15.33     0.05
  7   0.0630  -1823.79    -0.06    -218.55    -0.04
  8   0.0631  -1826.57    -0.14    -219.04    -0.07
  9   0.7319  13708.83    -0.14   -1733.25     0.11
 10   0.8056  13367.27     0.02   -1579.34     0.00
 11   0.8112  13286.82     0.05   -1570.00     0.03
 12   0.8710  12034.67    -0.04   -1504.64     0.03
 13   0.8711  12031.48    -0.21   -1504.63    -0.00
 14   0.8875  11581.90    -0.03   -1499.50    -0.05
 15   0.9666   9056.29     0.19   -1564.94    -0.06
 16   0.9667   9052.28     0.07   -1565.11    -0.01
 17   0.9668   9048.23    -0.02   -1565.29     0.03
 18   0.9668   9047.89     0.08   -1565.47    -0.12
 19   0.9857   8416.33    -0.05   -1604.04     0.03
 20   0.9858   8412.05    -0.05   -1604.35     0.02
 21   0.9859   8408.24    -0.07   -1604.54     0.11
 22   0.9914   8228.21     0.00   -1617.52    -0.05
 23   1.0541   6314.94    -0.11   -1814.27     0.00
 24   1.0542   6311.99     0.04   -1814.73    -0.02
 25   1.0623   6096.58     0.01   -1846.36     0.01
 26   1.1144   4983.79    -0.00   -2075.39    -0.01
 27   1.1335   4709.92    -0.10   -2168.34    -0.04
 28   1.1361   4678.22     0.05   -2181.56    -0.00
 29   1.6928  21017.45     0.05   -3410.35    -0.02
 30   1.7092  21251.47    -0.00   -3376.98    -0.03
 31   1.7968  21325.20     0.02   -3211.64    -0.19
 32   1.8487  20492.24    -0.04   -3150.48     0.11
 33   1.8625  20177.40     0.05   -3142.05    -0.11
 34   1.8651  20114.77    -0.03   -3140.75    -0.03
 35   1.9197  18565.42     0.13   -3147.55    -0.03
 36   1.9333  18129.22    -0.01   -3159.47    -0.00
 37   2.0044  15762.00     0.04   -3290.81    -0.01
 38   2.0998  13121.83     0.03   -3630.68     0.04
 39   2.1027  13062.42     0.01   -3643.49     0.00
 40   2.8481  28451.97     0.03   -4784.65     0.01
 41   2.8481  28451.72     0.05   -4784.62     0.03
 42   2.8505  28402.02     0.05   -4783.31     0.02
 43   2.9793  24596.39    -0.23   -4877.48    -0.02
 44   3.2277  20022.07     0.01   -5841.79     0.08
 45   3.2386  20117.48     0.03   -5892.27     0.05

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.

15KO173    quality flag:3

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

axisobj        39.215    39.223    39.207
ecceobj         0.189     0.189     0.189
incobj         13.061    13.061    13.061
qmin           30.901    30.885    30.911
qmax           48.540    48.469    48.342
amean          39.455    39.456    39.456
amin           39.067    39.059    39.075
amax           39.893    39.906    39.885
emean           0.189     0.190     0.189
emin            0.165     0.167     0.165
emax            0.217     0.216     0.215
imean          11.896    11.882    11.906
imin           11.037    11.031    11.046
imax           12.846    12.829    12.864
excite_mean     0.280     0.280     0.280
fracstop        1.000     1.000     1.000
cjmean          2.963     2.963     2.963

libcent 0       180.3     181.1     180.2
libamp  0        53.8      57.7      49.9
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       179.1     178.2     180.0
kozaiamp        180.0     179.9     180.0