Orbit Fit and Astrometric record for 15KJ173

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: 15KJ173   
# Created Mon Apr 22 01:10:07 2019
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   30
# Arc:   2.50y
# First observation: 2015/02/25
#  Last observation: 2017/08/25
Preliminary a, adot, b, bdot, g, gdot:
  -0.000134   0.026705  -0.000006  -0.003504   0.026449   0.000000
# Chi-squared of fit:    11.97 DOF:   52 RMS:  0.11
# Min/Max residuals:    -0.39    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.520788E-05  2.648875E-02 -1.489901E-06 -3.524874E-03  2.622653E-02  3.532185E-03
# Covariance matrix:
  1.7146E-13 -1.3356E-14 -6.1689E-15 -8.2015E-15  1.1604E-13  1.6221E-12
 -1.3356E-14  3.7888E-13  7.6379E-15 -6.7419E-14  2.2985E-13  9.8622E-12
 -6.1689E-15  7.6379E-15  1.1088E-13 -8.1004E-14 -4.2140E-15  3.8553E-13
 -8.2015E-15 -6.7419E-14 -8.1004E-14  1.1933E-13 -4.5965E-14 -2.5064E-12
  1.1604E-13  2.2985E-13 -4.2140E-15 -4.5965E-14  2.7361E-13  7.2844E-12
  1.6221E-12  9.8622E-12  3.8553E-13 -2.5064E-12  7.2844E-12  3.6060E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.398965 -125.678957    0.964844    0.030413   -0.205126  2457079.141088
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:           69.74258 +/-     0.038
Argument of Peri:       48.77602 +/-     0.040
Long of Asc Node:      101.22908 +/-     0.003
Inclination:            11.11084 +/-     0.000
Eccentricity:         0.11189850 +/-    0.0007
Semi-Major Axis:     39.41515506 +/-    0.0074
Time of Perihelion: 2439560.3937 +/-       8.2
Perihelion:          35.00465817 +/-    0.0289
Aphelion:            43.82565195 +/-    0.0294
Period (y)              247.4589 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -22.90742095 +/-    0.0004
Ecliptic Y          -30.24568410 +/-    0.0006
Ecliptic Z            5.56932711 +/-    0.0001
Ecliptic XDOT         0.00199849 +/-    0.0000
Ecliptic YDOT        -0.00195839 +/-    0.0000
Ecliptic ZDOT        -0.00031007 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.34799533 +/-    0.0005
Geocenter to KBO     38.12932374 +/-    0.0008
# Hcoef:  8.89

The following table shows the complete astrometric record for 15KJ173. 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 (15KJ173) followed by the observatory code and reference code for the source of the astrometry.

2015 02  25.64031  15 36 10.049  -10 41 53.56  24.8r 15KJ173   568  C~2lVF      
2015 03  19.63267  15 35 43.928  -10 36 17.86  24.0r 15KJ173   568  C~2lVF      
2015 03  22.55230  15 35 36.926  -10 35 24.49  24.7r 15KJ173   568  C~2lVF      
2015 04  13.56418  15 34 21.615  -10 28 05.55  24.5r 15KJ173   568  C~2lVF      
2015 04  13.60528  15 34 21.429  -10 28 04.48  25.1r 15KJ173   568  C~2lVF      
2015 04  18.57429  15 33 59.868  -10 26 21.68  24.6r 15KJ173   568  C~2lVF      
2015 05  21.33472  15 31 16.279  -10 16 06.44  24.2r 15KJ173   568  C~2lVF      
2015 05  21.37588  15 31 16.070  -10 16 05.80  24.7r 15KJ173   568  C~2lVF      
2015 05  21.41717  15 31 15.848  -10 16 05.13  24.5r 15KJ173   568  C~2lVF      
2015 05  22.49362  15 31 10.265  -10 15 48.52  24.7r 15KJ173   568  C~2lVF      
2015 05  22.51002  15 31 10.199  -10 15 48.18  24.7r 15KJ173   568  C~2lVF      
2015 05  25.48424  15 30 54.866  -10 15 04.20  24.3r 15KJ173   568  C~2lVF      
2015 06  20.41439  15 28 52.728  -10 10 44.22  25.1r 15KJ173   568  C~2lVF      
2015 06  23.43462  15 28 40.602  -10 10 30.64  24.8r 15KJ173   568  C~2lVF      
2015 07  11.31733  15 27 42.010  -10 10 30.09  24.6r 15KJ173   568  C~2lVF      
2016 02  05.64703  15 41 34.645  -11 17 24.13  24.8w 15KJ173   568  C~2lVF      
2016 02  11.65893  15 41 46.241  -11 16 55.68  24.8w 15KJ173   568  C~2lVF      
2016 02  12.59849  15 41 47.703  -11 16 49.75  24.9w 15KJ173   568  C~2lVF      
2016 03  15.59026  15 41 41.890  -11 10 33.48  24.0w 15KJ173   568  C~2lVF      
2016 03  17.60989  15 41 38.011  -11 10 00.54  25.4w 15KJ173   568  C~2lVF      
2016 04  03.52224  15 40 51.134  -11 04 52.11  25.5w 15KJ173   568  C~2lVF      
2016 04  08.57191  15 40 32.668  -11 03 13.12  24.8w 15KJ173   568  C~2lVF      
2016 04  29.45352  15 39 00.062  -10 56 22.11  24.6w 15KJ173   568  C~2lVF      
2016 05  04.38860  15 38 35.468  -10 54 49.26  24.5w 15KJ173   568  C~2lVF      
2016 05  30.47009  15 36 21.049  -10 47 55.29  24.5w 15KJ173   568  C~2lVF      
2016 07  03.35835  15 33 55.152  -10 44 16.27  25.0w 15KJ173   568  C~2lVF      
2016 07  05.34215  15 33 48.769  -10 44 17.68  24.7w 15KJ173   568  C~2lVF      
2017 03  28.59816  15 47 03.208  -11 39 41.66  24.7w 15KJ173   568  C~2lVF      
2017 08  19.25564  15 38 45.165  -11 24 53.33  25.2w 15KJ173   568  C~2lVF      
2017 08  25.26415  15 38 52.632  -11 26 47.24  25.2w 15KJ173   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    -0.13
  2   0.0602   -453.48    -0.10     235.21     0.07
  3   0.0682   -566.41     0.09     262.66     0.05
  4   0.1285  -1749.49     0.05     425.85    -0.12
  5   0.1286  -1752.41    -0.14     426.23     0.06
  6   0.1422  -2085.80     0.04     450.51     0.05
  7   0.2319  -4577.45    -0.05     471.46    -0.06
  8   0.2320  -4580.60     0.06     471.34    -0.03
  9   0.2321  -4583.94    -0.00     471.21    -0.02
 10   0.2351  -4667.97    -0.07     467.56    -0.04
 11   0.2351  -4669.00     0.19     467.66     0.12
 12   0.2432  -4899.38    -0.06     456.03    -0.13
 13   0.3142  -6713.38    -0.04     273.92     0.04
 14   0.3225  -6890.57    -0.03     243.80     0.04
 15   0.3715  -7731.05    -0.04      34.67    -0.07
 16   0.9446   5146.45     0.05    -953.54    -0.02
 17   0.9610   5305.90     0.06    -886.34    -0.01
 18   0.9636   5325.46    -0.12    -875.59     0.13
 19   1.0512   5154.99 (  -0.28)   -529.23 (   0.43)
 20   1.0567   5091.79    -0.03    -510.40    -0.05
 21   1.1030   4348.71    -0.08    -370.42     0.00
 22   1.1169   4061.19     0.11    -337.33     0.31
 23   1.1740   2638.97    -0.06    -255.65     0.01
 24   1.1875   2265.02     0.01    -250.14    -0.10
 25   1.2589    242.91    -0.16    -313.25    -0.06
 26   1.3517  -1897.75     0.25    -609.84     0.13
 27   1.3572  -1988.79    -0.14    -633.59    -0.12
 28   2.0861  10161.62    -0.04   -1147.79     0.13
 29   2.4794   2826.23     0.00   -1970.89    -0.39
 30   2.4959   2959.65     0.09   -2055.98     0.19

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.

15KJ173    quality flag:3

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

axisobj        39.092    39.115    39.069
ecceobj         0.107     0.109     0.105
incobj         11.106    11.106    11.106
qmin           34.109    34.033    34.153
qmax           45.320    45.139    45.286
amean          39.459    39.459    39.459
amin           39.092    39.115    39.069
amax           39.870    39.850    39.891
emean           0.114     0.115     0.113
emin            0.094     0.096     0.092
emax            0.137     0.134     0.136
imean           9.381     9.371     9.387
imin            8.667     8.693     8.648
imax           10.106    10.112    10.118
excite_mean     0.199     0.200     0.198
fracstop        1.000     1.000     1.000
cjmean          3.007     3.007     3.007

libcent 0       179.7     181.4     180.8
libamp  0        61.9      47.7      74.8
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       178.8     179.6     179.8
kozaiamp        179.9     179.9     180.0