Orbit Fit and Astrometric record for 15KN173

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: 15KN173   
# Created Wed Feb 20 02:10:33 2019
# Orbit generated from Bernstein formalism
# Fitting   36 observations of   36
# Arc:   3.24y
# First observation: 2014/05/29
#  Last observation: 2017/08/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000009   0.038631  -0.000014  -0.004006   0.032056   0.000000
# Chi-squared of fit:     5.38 DOF:   66 RMS:  0.07
# Min/Max residuals:    -0.17    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.944073E-05  3.891499E-02 -1.713568E-06 -4.054322E-03  3.225545E-02 -1.330273E-03
# Covariance matrix:
  2.2011E-13 -2.4542E-13 -1.0010E-14  1.9722E-14 -8.7206E-14 -1.4890E-12
 -2.4542E-13  4.3473E-13  2.0921E-14 -4.2580E-14  1.2081E-13  3.1552E-12
 -1.0010E-14  2.0921E-14  1.2666E-13 -6.4100E-14  7.0450E-15  1.6953E-13
  1.9722E-14 -4.2580E-14 -6.4100E-14  4.9976E-14 -1.1878E-14 -3.4492E-13
 -8.7206E-14  1.2081E-13  7.0450E-15 -1.1878E-14  1.5163E-13  9.8444E-13
 -1.4890E-12  3.1552E-12  1.6953E-13 -3.4492E-13  9.8444E-13  2.5564E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    5.445104 -127.624192   -0.270482    0.092847   -0.973439  2456806.847808
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:          354.43036 +/-     0.030
Argument of Peri:      146.90742 +/-     0.046
Long of Asc Node:       94.01992 +/-     0.001
Inclination:             7.99076 +/-     0.000
Eccentricity:         0.19307933 +/-    0.0000
Semi-Major Axis:     39.56038634 +/-    0.0023
Time of Perihelion: 2458206.5933 +/-       7.7
Perihelion:          31.92209357 +/-    0.0024
Aphelion:            47.19867911 +/-    0.0032
Period (y)              248.8279 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -19.22508042 +/-    0.0002
Ecliptic Y          -25.38233953 +/-    0.0003
Ecliptic Z            2.94189316 +/-    0.0000
Ecliptic XDOT         0.00265960 +/-    0.0000
Ecliptic YDOT        -0.00195696 +/-    0.0000
Ecliptic ZDOT        -0.00035317 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.97689186 +/-    0.0003
Geocenter to KBO     31.00250838 +/-    0.0004
# Hcoef:  8.42

The following table shows the complete astrometric record for 15KN173. 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 (15KN173) followed by the observatory code and reference code for the source of the astrometry.

2014 05  29.34703  15 25 34.750  -13 05 42.54  23.4r 15KN173   568  C~2lVF      
2014 05  29.38590  15 25 34.521  -13 05 41.91  23.4r 15KN173   568  C~2lVF      
2014 05  29.42474  15 25 34.293  -13 05 41.18  23.4r 15KN173   568  C~2lVF      
2014 05  30.44923  15 25 28.302  -13 05 24.27  22.3r 15KN173   568  C~2lVF      
2014 05  30.45456  15 25 28.264  -13 05 23.84  22.1r 15KN173   568  C~2lVF      
2014 05  31.37090  15 25 22.938  -13 05 08.76  23.7r 15KN173   568  C~2lVF      
2015 02  20.65667  15 40 34.200  -14 19 05.57  23.4r 15KN173   568  C~2lVF      
2015 03  19.57074  15 40 13.805  -14 14 37.18  23.5r 15KN173   568  C~2lVF      
2015 03  21.62951  15 40 08.615  -14 14 06.28  23.4r 15KN173   568  C~2lVF      
2015 04  12.48811  15 38 46.660  -14 07 34.50  23.5r 15KN173   568  C~2lVF      
2015 04  12.52910  15 38 46.455  -14 07 33.57  23.5r 15KN173   568  C~2lVF      
2015 05  17.38343  15 35 29.004  -13 55 43.01  23.5r 15KN173   568  C~2lVG      
2015 05  17.42514  15 35 28.737  -13 55 42.32  23.3r 15KN173   568  C~2lVG      
2015 05  17.46733  15 35 28.492  -13 55 41.51  22.8r 15KN173   568  C~2lVG      
2015 05  24.36911  15 34 46.243  -13 53 33.94  23.3r 15KN173   568  C~2lVG      
2015 05  24.41533  15 34 45.956  -13 53 33.11  23.5r 15KN173   568  C~2lVG      
2015 05  24.45620  15 34 45.702  -13 53 32.39  23.4r 15KN173   568  C~2lVG      
2015 05  26.44379  15 34 33.653  -13 52 57.60  23.2r 15KN173   568  C~2lVG      
2015 06  21.35896  15 32 10.315  -13 47 10.15  23.3r 15KN173   568  C~2lVG      
2015 07  17.34619  15 30 35.495  -13 45 46.02  23.7r 15KN173   568  C~2lVG      
2015 07  18.31678  15 30 33.257  -13 45 48.79  23.4r 15KN173   568  C~2lVG      
2016 02  06.64126  15 48 35.340  -15 02 20.61  23.8w 15KN173   568  C~2lVG      
2016 02  12.62680  15 48 51.455  -15 02 29.55  23.8w 15KN173   568  C~2lVG      
2016 03  15.64024  15 48 59.099  -14 59 07.15  23.7w 15KN173   568  C~2lVG      
2016 04  03.56687  15 48 04.869  -14 54 27.00  23.6w 15KN173   568  C~2lVG      
2016 04  08.61643  15 47 44.142  -14 52 58.51  23.6w 15KN173   568  C~2lVG      
2016 04  09.56037  15 47 40.019  -14 52 41.45  23.7w 15KN173   568  C~2lVG      
2016 05  30.47415  15 42 49.792  -14 36 57.63  23.5w 15KN173   568  C~2lVG      
2016 07  04.29413  15 39 51.346  -14 31 06.04  23.6w 15KN173   568  C~2lVG      
2016 07  05.36242  15 39 47.279  -14 31 02.39  23.5w 15KN173   568  C~2lVG      
2017 04  03.61140  15 56 51.933  -15 37 30.64  23.7w 15KN173   568  C~2lVG      
2017 04  03.61609  15 56 51.909  -15 37 30.54  23.7w 15KN173   568  C~2lVG      
2017 04  04.49990  15 56 48.651  -15 37 16.94  23.6w 15KN173   568  C~2lVG      
2017 05  21.53807  15 52 35.947  -15 23 33.52  23.3w 15KN173   568  C~2lVG      
2017 08  20.28063  15 47 23.215  -15 19 43.62  23.5w 15KN173   568  C~2lVG      
2017 08  24.25065  15 47 29.192  -15 20 47.79  23.9w 15KN173   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    -0.07       0.00    -0.06
  2   0.0001     -3.40    -0.02      -0.22    -0.07
  3   0.0002     -6.80     0.02      -0.35     0.02
  4   0.0030    -95.79     0.16      -5.80    -0.17
  5   0.0030    -96.43    -0.02      -5.52     0.14
  6   0.0055   -175.55    -0.11     -10.33     0.16
  7   0.7319  13803.64    -0.00   -1102.99     0.04
  8   0.8055  13450.93    -0.15    -911.11     0.03
  9   0.8112  13369.99    -0.01    -898.75    -0.01
 10   0.8710  12114.59     0.07    -798.27    -0.06
 11   0.8711  12111.46    -0.04    -798.07     0.03
 12   0.9666   9143.54     0.00    -791.05     0.04
 13   0.9667   9139.59    -0.06    -791.31    -0.09
 14   0.9668   9135.93     0.21    -791.38    -0.02
 15   0.9857   8506.99    -0.00    -815.07     0.00
 16   0.9858   8502.72    -0.02    -815.27     0.01
 17   0.9859   8498.95    -0.02    -815.46     0.00
 18   0.9914   8319.98    -0.03    -823.85    -0.01
 19   1.0623   6207.56     0.00    -991.13     0.02
 20   1.1335   4846.30     0.10   -1246.07    -0.05
 21   1.1361   4815.34    -0.01   -1256.73    -0.01
 22   1.6928  21249.44     0.14   -2028.78    -0.10
 23   1.7092  21481.34    -0.05   -1984.73    -0.03
 24   1.7968  21544.22    -0.02   -1761.39     0.10
 25   1.8487  20706.57     0.01   -1665.02    -0.02
 26   1.8625  20390.76    -0.03   -1646.64    -0.04
 27   1.8651  20328.07    -0.04   -1643.53     0.00
 28   2.0045  15980.13    -0.06   -1688.65     0.01
 29   2.0998  13365.75     0.05   -1951.17     0.03
 30   2.1027  13307.25     0.02   -1961.50     0.07
 31   2.8481  28833.54     0.06   -2507.60     0.07
 32   2.8481  28833.18    -0.04   -2507.58     0.07
 33   2.8505  28783.33     0.02   -2504.41    -0.05
 34   2.9793  24975.14     0.09   -2496.93    -0.04
 35   3.2277  20460.96    -0.12   -3286.93    -0.06
 36   3.2386  20560.73    -0.03   -3330.15    -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.

15KN173    quality flag:3

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

axisobj        39.306    39.313    39.298
ecceobj         0.189     0.189     0.189
incobj          7.987     7.987     7.987
qmin           31.160    31.178    31.182
qmax           48.398    48.416    48.370
amean          39.456    39.456    39.456
amin           38.995    38.980    38.983
amax           39.994    39.979    39.992
emean           0.193     0.193     0.192
emin            0.174     0.175     0.173
emax            0.210     0.211     0.211
imean           6.491     6.474     6.512
imin            5.915     5.895     5.939
imax            7.191     7.137     7.240
excite_mean     0.223     0.223     0.223
fracstop        1.000     1.000     1.000
cjmean          2.995     2.995     2.995

libcent 0       179.7     180.1     180.1
libamp  0        93.8      96.5      91.4
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       185.5     178.8     187.2
kozaiamp        179.9     180.0     180.0