Orbit Fit and Astrometric record for 15KG163

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: 15KG163   
# Created Mon Oct 23 01:38:36 2017
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   29
# Arc:   2.02y
# First observation: 2015/05/17
#  Last observation: 2017/05/25
Preliminary a, adot, b, bdot, g, gdot:
  -0.000159   0.033176  -0.000023   0.007835   0.024499   0.000000
# Chi-squared of fit:     8.82 DOF:   52 RMS:  0.10
# Min/Max residuals:    -0.20    0.35
# Exact a, adot, b, bdot, g, gdot:
  2.185773E-05  3.297979E-02  4.451409E-06  7.805633E-03  2.496644E-02 -3.917062E-03
# Covariance matrix:
  1.1396E-13 -1.6717E-13  3.5048E-15 -1.8861E-14  1.7837E-14 -1.4403E-12
 -1.6717E-13  8.1152E-13 -2.6198E-14  1.5705E-13  7.7822E-14  1.1893E-11
  3.5048E-15 -2.6198E-14  1.0014E-13 -8.4242E-14 -2.1017E-15 -4.5190E-13
 -1.8861E-14  1.5705E-13 -8.4242E-14  1.6370E-13  3.0878E-14  2.7770E-12
  1.7837E-14  7.7822E-14 -2.1017E-15  3.0878E-14  2.4659E-13  2.2366E-12
 -1.4403E-12  1.1893E-11 -4.5190E-13  2.7770E-12  2.2366E-12  2.0993E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.485477 -122.997037    0.015540    0.079035   -1.006289  2457159.892568
# Heliocentric elements and errors
Epoch:              2457150.5000  =  2015/05/08
Mean Anomaly:          359.86719 +/-     0.001
Argument of Peri:       31.87693 +/-     0.049
Long of Asc Node:      219.08625 +/-     0.001
Inclination:            13.98499 +/-     0.001
Eccentricity:         0.94311726 +/-    0.0002
Semi-Major Axis:    712.22452857 +/-    2.2305
Time of Perihelion: 2459711.7662 +/-       9.0
Perihelion:          40.51328381 +/-    0.1810
Aphelion:          1383.93577334 +/-    4.3361
Period (y)            19007.8761 +/-     89.29
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -22.31160933 +/-    0.0004
Ecliptic Y          -34.32864870 +/-    0.0007
Ecliptic Z            3.13269302 +/-    0.0001
Ecliptic XDOT         0.00330008 +/-    0.0000
Ecliptic YDOT        -0.00156041 +/-    0.0000
Ecliptic ZDOT         0.00081983 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.06187768 +/-    0.0006
Geocenter to KBO     40.05376316 +/-    0.0008
# Hcoef:  8.24

The following table shows the complete astrometric record for 15KG163. 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 (15KG163) followed by the observatory code and reference code for the source of the astrometry.

2015 05  17.39179  15 43 06.789  -15 07 11.77  24.0r 15KG163   568  C~2Gtz      
2015 05  17.43344  15 43 06.608  -15 07 11.10  24.3r 15KG163   568  C~2Gtz      
2015 05  17.48044  15 43 06.411  -15 07 10.23  24.1r 15KG163   568  C~2Gu0      
2015 05  17.48543  15 43 06.373  -15 07 09.91  23.8r 15KG163   568  C~2Gu0      
2015 05  17.51054  15 43 06.249  -15 07 09.62  24.1r 15KG163   568  C~2Gu0      
2015 05  24.37741  15 42 34.897  -15 04 55.38  24.5r 15KG163   568  C~2Gu0      
2015 05  24.42349  15 42 34.677  -15 04 54.33  24.2r 15KG163   568  C~2Gu0      
2015 05  24.46441  15 42 34.487  -15 04 53.64  24.2r 15KG163   568  C~2Gu0      
2015 05  26.45236  15 42 25.465  -15 04 15.85  24.6r 15KG163   568  C~2Gu0      
2015 06  18.35156  15 40 48.501  -14 57 56.37  24.0r 15KG163   568  C~2Gu0      
2015 06  18.39254  15 40 48.339  -14 57 55.86  24.4r 15KG163   568  C~2Gu0      
2015 06  21.36717  15 40 37.255  -14 57 15.64  24.5r 15KG163   568  C~2Gu0      
2015 07  10.39924  15 39 39.201  -14 54 00.95  24.3r 15KG163   568  C~2Gu0      
2015 07  18.32574  15 39 22.816  -14 53 14.67  24.3r 15KG163   568  C~2Gu0      
2016 02  06.65744  15 54 03.865  -15 31 06.44  24.9w 15KG163   568  C~2Gu0      
2016 02  12.64299  15 54 18.493  -15 30 42.65  24.7w 15KG163   568  C~2Gu0      
2016 03  17.62613  15 54 32.965  -15 24 54.11  24.2w 15KG163   568  C~2Gu0      
2016 04  08.63261  15 53 44.499  -15 18 36.03  24.1w 15KG163   568  C~2Gu0      
2016 04  09.57657  15 53 41.585  -15 18 18.03  23.6w 15KG163   568  C~2Gu0      
2016 04  29.52576  15 52 27.478  -15 11 41.30        15KG163   568  C~2Gu0      
2016 04  29.53411  15 52 27.442  -15 11 41.20        15KG163   568  C~2Gu0      
2016 05  04.49833  15 52 06.186  -15 10 00.55        15KG163   568  C~2Gu0      
2016 05  04.50650  15 52 06.157  -15 10 00.44        15KG163   568  C~2Gu0      
2016 05  30.44177  15 50 08.543  -15 01 43.20        15KG163   568  C~2Gu0      
2016 07  04.32652  15 47 53.382  -14 53 54.51  23.9w 15KG163   568  C~2Gu0      
2016 07  05.39888  15 47 50.261  -14 53 45.46        15KG163   568  C~2Gu0      
2017 03  30.58668  16 02 14.464  -15 18 48.81  24.6w 15KG163   568  C~2Gu0      
2017 05  24.52991  15 58 44.768  -15 01 20.50  25.0w 15KG163   568  C~2Gu0      
2017 05  25.53328  15 58 40.121  -15 01 02.57  24.4w 15KG163   568  C~2Gu0      

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    -0.20       0.00     0.10
  2   0.0001     -2.70     0.02       0.06    -0.01
  3   0.0002     -5.68     0.35       0.27    -0.01
  4   0.0003     -6.29     0.09       0.46     0.16
  5   0.0003     -8.10     0.03       0.34    -0.08
  6   0.0191   -480.70     0.03      29.13    -0.14
  7   0.0193   -484.04    -0.10      29.43     0.00
  8   0.0194   -486.87    -0.08      29.49    -0.09
  9   0.0248   -622.70    -0.13      36.90     0.01
 10   0.0875  -2076.97     0.15      89.01     0.00
 11   0.0876  -2079.37     0.13      88.97    -0.07
 12   0.0958  -2244.95    -0.00      91.67    -0.03
 13   0.1479  -3108.75    -0.17      89.68     0.09
 14   0.1696  -3350.62    -0.09      80.50     0.08
 15   0.7263   9596.75    -0.09     675.24     0.02
 16   0.7426   9798.78    -0.10     743.39     0.00
 17   0.8357   9929.82     0.10    1128.78    -0.11
 18   0.8959   9162.96    -0.18    1349.75     0.01
 19   0.8985   9117.85    -0.05    1358.38     0.07
 20   0.9531   7983.49     0.02    1517.23     0.08
 21   0.9532   7982.96     0.03    1517.21     0.01
 22   0.9668   7660.36     0.06    1549.60     0.03
 23   0.9668   7659.93     0.18    1549.61    -0.00
 24   1.0378   5887.52     0.10    1667.94    -0.06
 25   1.1333   3872.59     0.02    1698.44    -0.04
 26   1.1362   3826.44    -0.09    1697.35    -0.05
 27   1.8705  16411.92     0.02    2875.57    -0.02
 28   2.0209  13208.99     0.11    3278.58     0.04
 29   2.0237  13139.13    -0.14    3282.15    -0.00

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.

15KG163    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       615.984   619.671   612.312
ecceobj         0.934     0.935     0.934
incobj         14.033    14.032    14.033
qmin           34.352    33.823    34.270
qmax         1559.673  1878.030  1673.226
amean         642.291   728.341   678.758
amin          544.994   619.670   608.862
amax          800.079   959.231   856.856
emean           0.937     0.944     0.940
emin            0.921     0.930     0.929
emax            0.950     0.958     0.953
imean          14.590    14.586    14.596
imin           13.666    13.534    13.617
imax           15.760    15.803    15.740
excite_mean     0.970     0.977     0.973
fracstop        1.000     1.000     1.000
cjmean          3.172     3.172     3.172

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
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        35.9      35.6      35.5
kozaiamp          6.4       6.2       6.2