Orbit Fit and Astrometric record for 15KL173

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: 15KL173   
# Created Sun Apr 21 01:10:07 2019
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:   2.26y
# First observation: 2015/05/21
#  Last observation: 2017/08/25
Preliminary a, adot, b, bdot, g, gdot:
   0.000233   0.042627  -0.000064  -0.005001   0.034422   0.000000
# Chi-squared of fit:     3.87 DOF:   34 RMS:  0.08
# Min/Max residuals:    -0.20    0.13
# Exact a, adot, b, bdot, g, gdot:
  2.070383E-05  4.431057E-02 -2.197785E-06 -5.277149E-03  3.517260E-02  9.588065E-03
# Covariance matrix:
  1.5916E-13 -1.6523E-13 -1.2463E-15  1.0299E-14  3.6901E-14 -6.9361E-13
 -1.6523E-13  1.0461E-12  2.9257E-14 -1.4150E-13  3.2230E-13  1.2165E-11
 -1.2463E-15  2.9257E-14  1.4452E-13 -1.0947E-13  1.4507E-14  4.1147E-13
  1.0299E-14 -1.4150E-13 -1.0947E-13  1.8450E-13 -4.8339E-14 -1.9391E-12
  3.6901E-14  3.2230E-13  1.4507E-14 -4.8339E-14  4.1848E-13  5.1358E-12
 -6.9361E-13  1.2165E-11  4.1147E-13 -1.9391E-12  5.1358E-12  1.6900E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.183645 -123.279070   -0.056684    0.143704   -0.998588  2457163.847978
# Heliocentric elements and errors
Epoch:              2457160.5000  =  2015/05/18
Mean Anomaly:           26.94743 +/-     0.014
Argument of Peri:       77.49334 +/-     0.036
Long of Asc Node:      106.06109 +/-     0.002
Inclination:            10.38688 +/-     0.000
Eccentricity:         0.33012596 +/-    0.0003
Semi-Major Axis:     39.62398612 +/-    0.0090
Time of Perihelion: 2450341.0323 +/-       2.7
Perihelion:          26.54307956 +/-    0.0128
Aphelion:            52.70489269 +/-    0.0165
Period (y)              249.4281 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -15.95088164 +/-    0.0003
Ecliptic Y          -24.40149566 +/-    0.0004
Ecliptic Z            4.04707447 +/-    0.0001
Ecliptic XDOT         0.00244328 +/-    0.0000
Ecliptic YDOT        -0.00256523 +/-    0.0000
Ecliptic ZDOT        -0.00030028 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.43199665 +/-    0.0004
Geocenter to KBO     28.43122357 +/-    0.0005
# Hcoef:  9.96

The following table shows the complete astrometric record for 15KL173. 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 (15KL173) followed by the observatory code and reference code for the source of the astrometry.

2015 05  21.34720  15 45 23.248  -11 27 09.58  24.6r 15KL173   568  C~2lVF      
2015 05  21.38827  15 45 22.988  -11 27 08.80  24.5r 15KL173   568  C~2lVF      
2015 05  21.42959  15 45 22.714  -11 27 08.20  24.7r 15KL173   568  C~2lVF      
2015 05  22.50587  15 45 15.636  -11 26 48.68  24.1r 15KL173   568  C~2lVF      
2015 05  25.49667  15 44 56.055  -11 25 56.60  24.5r 15KL173   568  C~2lVF      
2015 06  20.38582  15 42 18.784  -11 20 52.71  24.5r 15KL173   568  C~2lVF      
2015 06  20.42660  15 42 18.563  -11 20 52.46  24.5r 15KL173   568  C~2lVF      
2015 06  23.44700  15 42 02.712  -11 20 36.85  24.0r 15KL173   568  C~2lVF      
2015 07  12.30961  15 40 42.106  -11 20 45.54  24.7r 15KL173   568  C~2lVF      
2015 07  18.39769  15 40 23.928  -11 21 28.70  24.4r 15KL173   568  C~2lVF      
2016 04  03.57092  15 59 32.705  -12 33 54.57  25.0w 15KL173   568  C~2lVF      
2016 04  08.62048  15 59 12.141  -12 32 07.91  24.9w 15KL173   568  C~2lVF      
2016 04  29.51761  15 57 23.122  -12 24 35.53  24.6w 15KL173   568  C~2lVF      
2016 05  04.49023  15 56 52.923  -12 22 51.16  24.8w 15KL173   568  C~2lVF      
2016 05  30.43772  15 54 05.226  -12 15 05.83  24.8w 15KL173   568  C~2lVF      
2016 07  04.32248  15 50 49.914  -12 10 54.78  24.5w 15KL173   568  C~2lVF      
2016 07  05.39482  15 50 45.332  -12 10 55.93  24.8w 15KL173   568  C~2lVF      
2017 01  31.65858  16 08 35.647  -13 31 42.28  24.5w 15KL173   568  C~2lVF      
2017 03  30.59606  16 09 18.346  -13 22 16.12  24.8w 15KL173   568  C~2lVF      
2017 08  25.24527  15 59 00.734  -13 09 35.71  25.9w 15KL173   568  C~2lVF      

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    -0.16       0.00    -0.04
  2   0.0001     -3.90     0.04      -0.09     0.05
  3   0.0002     -7.96     0.11      -0.40    -0.09
  4   0.0032   -113.75     0.06      -4.55    -0.01
  5   0.0114   -406.00     0.05     -17.97     0.07
  6   0.0822  -2728.02     0.03    -240.28     0.02
  7   0.0824  -2731.25     0.07    -240.77     0.03
  8   0.0906  -2961.93     0.05    -278.11     0.02
  9   0.1423  -4115.09    -0.07    -554.64    -0.01
 10   0.1589  -4365.78    -0.17    -657.33    -0.16
 11   0.8712  13051.76    -0.05   -1213.04     0.05
 12   0.8851  12733.72     0.09   -1171.95     0.13
 13   0.9423  11071.93    -0.20   -1066.73     0.03
 14   0.9559  10616.17     0.01   -1058.62    -0.03
 15   1.0269   8110.74     0.12   -1129.37     0.06
 16   1.1225   5257.91     0.02   -1504.18    -0.00
 17   1.1254   5192.56     0.02   -1519.95    -0.05
 18   1.7011  21591.50    -0.10   -2984.25    -0.03
 19   1.8597  22093.04     0.08   -2300.85     0.00
 20   2.2639  13045.57     0.01   -3409.29    -0.04

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.

15KL173    quality flag:3

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

axisobj        39.179    39.214    39.145
ecceobj         0.322     0.323     0.322
incobj         10.382    10.382    10.382
qmin           25.968    25.934    26.086
qmax           53.560    53.688    53.415
amean          39.454    39.454    39.454
amin           39.037    38.984    39.040
amax           39.993    40.012    39.989
emean           0.324     0.325     0.323
emin            0.309     0.310     0.310
emax            0.340     0.343     0.337
imean           9.247     9.160     9.289
imin            8.546     8.559     8.620
imax            9.973     9.877    10.014
excite_mean     0.362     0.362     0.361
fracstop        1.000     1.000     1.000
cjmean          2.901     2.901     2.902

libcent 0       180.2     180.3     179.8
libamp  0        60.5      70.1      53.7
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       171.5     169.4     175.7
kozaiamp        180.0     180.0     180.0