Orbit Fit and Astrometric record for 15KJ174

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: 15KJ174   
# Created Tue Apr 23 01:10:42 2019
# Orbit generated from Bernstein formalism
# Fitting   26 observations of   26
# Arc:   2.50y
# First observation: 2015/02/25
#  Last observation: 2017/08/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000115   0.023459   0.000038   0.003256   0.024304   0.000000
# Chi-squared of fit:     4.45 DOF:   46 RMS:  0.07
# Min/Max residuals:    -0.19    0.16
# Exact a, adot, b, bdot, g, gdot:
  1.597380E-05  2.323395E-02  1.529747E-06  3.274255E-03  2.408440E-02  2.830127E-03
# Covariance matrix:
  2.3609E-13 -1.6562E-14 -1.7040E-14  2.4385E-14  1.5542E-13  2.6269E-12
 -1.6562E-14  3.5292E-13 -3.4956E-14  8.6753E-14  2.1618E-13  1.0565E-11
 -1.7040E-14 -3.4956E-14  1.3722E-13 -1.0481E-13 -3.7911E-14 -1.4806E-12
  2.4385E-14  8.6753E-14 -1.0481E-13  1.4339E-13  7.4665E-14  3.8304E-12
  1.5542E-13  2.1618E-13 -3.7911E-14  7.4665E-14  2.8874E-13  8.7208E-12
  2.6269E-12  1.0565E-11 -1.4806E-12  3.8304E-12  8.7208E-12  4.6944E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.756890 -123.599798    0.971805    0.020342   -0.170613  2457079.117438
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:           74.07444 +/-     0.069
Argument of Peri:      314.24825 +/-     0.035
Long of Asc Node:      195.76035 +/-     0.003
Inclination:            10.55098 +/-     0.001
Eccentricity:         0.10070917 +/-    0.0009
Semi-Major Axis:     42.46234149 +/-    0.0092
Time of Perihelion: 2436274.9604 +/-      18.1
Perihelion:          38.18599420 +/-    0.0402
Aphelion:            46.73868878 +/-    0.0406
Period (y)              276.7032 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -23.72448182 +/-    0.0005
Ecliptic Y          -33.94844250 +/-    0.0008
Ecliptic Z            4.88526669 +/-    0.0001
Ecliptic XDOT         0.00204374 +/-    0.0000
Ecliptic YDOT        -0.00169685 +/-    0.0000
Ecliptic ZDOT         0.00040757 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.70388011 +/-    0.0007
Geocenter to KBO     41.52065072 +/-    0.0009
# Hcoef:  7.92

The following table shows the complete astrometric record for 15KJ174. 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 (15KJ174) followed by the observatory code and reference code for the source of the astrometry.

2015 02  25.61666  15 42 48.657  -12 46 18.49  24.4r 15KJ174   568  C~2lVJ      
2015 03  22.53917  15 42 22.179  -12 40 00.10  23.9r 15KJ174   568  C~2lVJ      
2015 04  13.55184  15 41 15.405  -12 32 45.82        15KJ174   568  C~2lVJ      
2015 05  21.32236  15 38 26.050  -12 20 03.34  23.7r 15KJ174   568  C~2lVJ      
2015 05  21.36353  15 38 25.853  -12 20 02.82  24.2r 15KJ174   568  C~2lVJ      
2015 05  21.40471  15 38 25.654  -12 20 01.89  24.0r 15KJ174   568  C~2lVJ      
2015 05  22.48134  15 38 20.499  -12 19 42.66  24.1r 15KJ174   568  C~2lVJ      
2015 05  25.47177  15 38 06.223  -12 18 50.39  24.2r 15KJ174   568  C~2lVJ      
2015 06  20.36123  15 36 12.051  -12 12 53.67  24.1r 15KJ174   568  C~2lVJ      
2015 06  20.40209  15 36 11.890  -12 12 53.29  23.8r 15KJ174   568  C~2lVJ      
2015 06  23.42230  15 36 00.390  -12 12 24.92  23.9r 15KJ174   568  C~2lVJ      
2015 07  11.29546  15 35 04.157  -12 10 42.67  24.1r 15KJ174   568  C~2lVJ      
2015 07  18.36550  15 34 48.359  -12 10 34.74  24.1r 15KJ174   568  C~2lVJ      
2016 02  06.63317  15 47 54.516  -12 55 52.92  23.9w 15KJ174   568  C~2lVJ      
2016 02  12.61871  15 48 05.649  -12 55 15.82  23.8w 15KJ174   568  C~2lVJ      
2016 03  15.62688  15 48 05.472  -12 48 44.82  24.3w 15KJ174   568  C~2lVJ      
2016 04  03.55069  15 47 21.160  -12 42 59.68  24.2w 15KJ174   568  C~2lVJ      
2016 04  08.60024  15 47 04.672  -12 41 19.22  24.2w 15KJ174   568  C~2lVJ      
2016 04  29.50143  15 45 40.846  -12 34 12.35  24.4w 15KJ174   568  C~2lVJ      
2016 05  04.47406  15 45 18.210  -12 32 32.35  24.3w 15KJ174   568  C~2lVJ      
2016 05  30.45796  15 43 14.783  -12 24 44.59  24.1w 15KJ174   568  C~2lVJ      
2016 07  04.31032  15 40 54.517  -12 18 41.96  24.4w 15KJ174   568  C~2lVJ      
2016 07  05.38268  15 40 51.261  -12 18 37.24  23.8w 15KJ174   568  C~2lVJ      
2017 03  30.57730  15 53 05.586  -12 50 57.13  24.9w 15KJ174   568  C~2lVJ      
2017 08  20.25685  15 45 27.387  -12 28 45.12  24.2w 15KJ174   568  C~2lVJ      
2017 08  26.26800  15 45 34.030  -12 30 00.38  24.1w 15KJ174   568  C~2lVJ      

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    -0.15       0.00     0.13
  2   0.0682   -462.89    -0.04     281.08    -0.04
  3   0.1285  -1513.38     0.08     482.54     0.05
  4   0.2319  -4103.17    -0.14     658.19     0.01
  5   0.2320  -4106.10    -0.04     658.03    -0.19
  6   0.2321  -4109.16    -0.06     658.27     0.00
  7   0.2351  -4187.13     0.07     659.63     0.01
  8   0.2433  -4402.84    -0.02     662.40     0.03
  9   0.3142  -6114.61     0.02     623.09     0.06
 10   0.3143  -6117.00     0.05     622.91     0.03
 11   0.3225  -6287.73    -0.00     611.42     0.01
 12   0.3715  -7114.26    -0.01     519.26     0.06
 13   0.3908  -7341.65     0.12     472.99     0.02
 14   0.9473   4488.99     0.15     438.97    -0.07
 15   0.9637   4639.62     0.16     511.12     0.02
 16   1.0514   4550.76    -0.06     892.00     0.09
 17   1.1032   3841.95    -0.03    1085.28    -0.10
 18   1.1170   3584.34     0.04    1129.78    -0.06
 19   1.1742   2292.88    -0.00    1273.09    -0.10
 20   1.1878   1947.46    -0.03    1296.58    -0.03
 21   1.2590     80.83    -0.03    1346.84    -0.00
 22   1.3544  -2003.22    -0.05    1234.80     0.01
 23   1.3573  -2050.76     0.08    1228.55    -0.05
 24   2.0916   8867.92    -0.02    1722.34    -0.08
 25   2.4822   2027.73    -0.06    1548.11     0.10
 26   2.4987   2139.37    -0.01    1496.46     0.09

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.

15KJ174    quality flag:2

Type:       SCATNEAR  SCATNEAR CLASSICAL

axisobj        42.124    42.152    42.097
ecceobj         0.096     0.098     0.094
incobj         10.595    10.595    10.595
qmin           35.505    37.561    36.771
qmax           49.553    47.327    48.253
amean          42.325    42.371    42.328
amin           41.908    41.901    41.940
amax           42.792    42.771    42.751
emean           0.091     0.058     0.072
emin            0.012     0.020     0.001
emax            0.161     0.109     0.130
imean          10.853    11.617    11.719
imin            9.294    10.564    10.081
imax           12.325    12.559    13.204
excite_mean     0.212     0.211     0.218
fracstop        1.000     1.000     1.000
cjmean          3.029     3.030     3.025

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       252.4     177.0     147.1
kozaiamp        180.0     180.0     179.9