Orbit Fit and Astrometric record for 15KJ175

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: 15KJ175   
# Created Sat Dec  4 02:13:25 2021
# Orbit generated from Bernstein formalism
# Fitting     23 observations of     23
# Arc:   1.36y
# First observation: 2015/02/25
#  Last observation: 2016/07/05
Preliminary a, adot, b, bdot, g, gdot:
  -0.000060   0.014372   0.000004  -0.011554   0.021357   0.000000
# Chi-squared of fit:     4.52 DOF:     40 RMS:  0.08
# Min/Max residuals:    -0.15    0.16
# Exact a, adot, b, bdot, g, gdot:
  1.047666E-05  1.418507E-02 -8.538926E-06 -1.143041E-02  2.116584E-02  1.106496E-03
# Covariance matrix:
  4.0029E-13 -1.0702E-13  1.9563E-14 -2.6871E-13  3.8089E-13  1.8647E-11
 -1.0702E-13  2.9219E-13 -7.3811E-15  2.3555E-14  3.6132E-14 -1.6407E-12
  1.9563E-14 -7.3811E-15  1.4738E-13 -2.1745E-13  4.2944E-14  5.1482E-12
 -2.6871E-13  2.3555E-14 -2.1745E-13  8.7572E-13 -4.7673E-13 -4.1656E-11
  3.8089E-13  3.6132E-14  4.2944E-14 -4.7673E-13  5.7469E-13  3.3091E-11
  1.8647E-11 -1.6407E-12  5.1482E-12 -4.1656E-11  3.3091E-11  2.8929E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.680441 -127.804123    0.956516    0.036784   -0.240107  2457079.135298
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          152.55685 +/-     1.230
Argument of Peri:        8.38774 +/-     1.227
Long of Asc Node:       61.65685 +/-     0.001
Inclination:            39.45617 +/-     0.002
Eccentricity:         0.11478679 +/-    0.0009
Semi-Major Axis:     43.01067426 +/-    0.0110
Time of Perihelion: 2413409.6683 +/-     351.5
Perihelion:          38.07361698 +/-    0.0419
Aphelion:            47.94773153 +/-    0.0425
Period (y)              282.0802 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.53567907 +/-    0.0010
Ecliptic Y          -36.50735430 +/-    0.0013
Ecliptic Z            7.13013503 +/-    0.0003
Ecliptic XDOT         0.00122265 +/-    0.0000
Ecliptic YDOT        -0.00141844 +/-    0.0000
Ecliptic ZDOT        -0.00143992 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.49717972 +/-    0.0012
Geocenter to KBO     47.24594260 +/-    0.0017
# Hcoef:  7.80

The following table shows the complete astrometric record for 15KJ175. 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 (15KJ175) followed by the observatory code and reference code for the source of the astrometry.

2015 02  25.63452  15 28 09.210  -09 55 00.61  24.4r 15KJ175   568  C~2nvh      
2015 03  19.62860  15 27 37.096  -09 51 30.78  24.5r 15KJ175   568  C~2nvh      
2015 03  22.54735  15 27 30.037  -09 50 56.07  24.7r 15KJ175   568  C~2nvh      
2015 04  13.56008  15 26 19.377  -09 46 06.56  24.9r 15KJ175   568  C~2nvh      
2015 04  13.60117  15 26 19.218  -09 46 05.78  24.7r 15KJ175   568  C~2nvh      
2015 04  18.57019  15 25 59.761  -09 44 58.28  24.7r 15KJ175   568  C~2nvh      
2015 05  21.33063  15 23 36.203  -09 38 31.80  24.6r 15KJ175   568  C~2nvh      
2015 05  21.37180  15 23 36.011  -09 38 31.26  24.6r 15KJ175   568  C~2nvh      
2015 05  21.41305  15 23 35.825  -09 38 31.03  24.3r 15KJ175   568  C~2nvh      
2015 05  22.48950  15 23 30.991  -09 38 21.56  24.2r 15KJ175   568  C~2nvh      
2015 05  25.48011  15 23 17.676  -09 37 56.55  24.4r 15KJ175   568  C~2nvh      
2015 06  20.36937  15 21 32.349  -09 36 05.40  24.5r 15KJ175   568  C~2nvh      
2015 06  20.41027  15 21 32.199  -09 36 05.64  24.7r 15KJ175   568  C~2nvh      
2015 06  23.43052  15 21 21.678  -09 36 06.52  24.7r 15KJ175   568  C~2nvh      
2015 07  11.31323  15 20 30.329  -09 37 18.87  24.6r 15KJ175   568  C~2nvh      
2015 07  18.37369  15 20 15.892  -09 38 19.45  24.3r 15KJ175   568  C~2nvh      
2016 04  03.51820  15 29 27.106  -10 38 54.96  24.0w 15KJ175   568  C~2nvh      
2016 04  08.56787  15 29 09.719  -10 37 50.69  25.0w 15KJ175   568  C~2nvh      
2016 04  29.44543  15 27 45.836  -10 33 23.69  24.9w 15KJ175   568  C~2nvh      
2016 05  04.38051  15 27 24.091  -10 32 24.25  25.0w 15KJ175   568  C~2nvh      
2016 05  30.50246  15 25 27.046  -10 28 15.86  25.0w 15KJ175   568  C~2nvh      
2016 07  03.35024  15 23 21.961  -10 27 19.82  24.1w 15KJ175   568  C~2nvh      
2016 07  05.33407  15 23 16.490  -10 27 28.38  24.7w 15KJ175   568  C~2nvh      

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     0.02       0.00    -0.00
     2   0.0602   -511.74    -0.02      85.74     0.02
     3   0.0682   -621.42     0.05      93.49    -0.11
     4   0.1285  -1705.04     0.05     114.48    -0.07
     5   0.1286  -1707.51    -0.00     114.65     0.14
     6   0.1422  -2002.91    -0.10     108.42     0.03
     7   0.2319  -4155.25     0.03     -47.90     0.01
     8   0.2320  -4158.14    -0.08     -48.09     0.16
     9   0.2321  -4160.86    -0.01     -48.56     0.04
    10   0.2351  -4232.46    -0.08     -57.32    -0.05
    11   0.2432  -4429.43    -0.01     -82.53    -0.04
    12   0.3141  -5965.97     0.08    -367.04     0.10
    13   0.3142  -5968.06     0.12    -367.83    -0.15
    14   0.3225  -6118.54    -0.04    -407.96    -0.02
    15   0.3715  -6835.75    -0.05    -670.03     0.02
    16   0.3908  -7027.19     0.05    -782.75    -0.07
    17   1.1030   1764.93    -0.10   -2268.84    -0.05
    18   1.1169   1500.64     0.02   -2269.76    -0.07
    19   1.1740    236.13    -0.01   -2316.88    -0.14
    20   1.1875    -89.28     0.09   -2338.81    -0.01
    21   1.2590  -1823.21     0.15   -2527.82     0.13
    22   1.3517  -3624.09    -0.14   -2935.69     0.12
    23   1.3572  -3700.10    -0.01   -2964.27    -0.02

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.

15KJ175    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        42.732    42.767    42.702
ecceobj         0.119     0.121     0.118
incobj         39.559    39.558    39.560
qmin           36.892    36.850    36.937
qmax           49.384    49.477    49.251
amean          42.980    43.009    42.955
amin           42.639    42.661    42.607
amax           43.357    43.374    43.321
emean           0.123     0.125     0.121
emin            0.108     0.110     0.107
emax            0.139     0.141     0.137
imean          38.211    38.211    38.213
imin           37.942    37.951    37.946
imax           38.496    38.508    38.479
excite_mean     0.631     0.631     0.630
fracstop        1.000     1.000     1.000
cjmean          2.564     2.564     2.564

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       156.0     156.9     154.8
kozaiamp        179.9     179.9     180.0