Orbit Fit and Astrometric record for 15KW174

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: 15KW174   
# Created Fri Dec  3 02:13:23 2021
# Orbit generated from Bernstein formalism
# Fitting     34 observations of     34
# Arc:   3.16y
# First observation: 2014/06/01
#  Last observation: 2017/07/28
Preliminary a, adot, b, bdot, g, gdot:
  -0.000142   0.022070  -0.000022   0.004736   0.023197   0.000000
# Chi-squared of fit:     6.75 DOF:     62 RMS:  0.08
# Min/Max residuals:    -0.23    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.508882E-05  2.182863E-02  2.994731E-06  4.695678E-03  2.328339E-02 -6.203417E-03
# Covariance matrix:
  2.4342E-13 -2.7231E-13  1.5186E-14 -3.5019E-14 -8.0849E-14 -2.8589E-12
 -2.7231E-13  4.8050E-13 -3.4827E-14  7.9148E-14  1.5772E-13  6.4831E-12
  1.5186E-14 -3.4827E-14  1.6793E-13 -1.0181E-13 -1.3469E-14 -5.5536E-13
 -3.5019E-14  7.9148E-14 -1.0181E-13  8.9658E-14  3.5930E-14  1.2759E-12
 -8.0849E-14  1.5772E-13 -1.3469E-14  3.5930E-14  1.8767E-13  2.8439E-12
 -2.8589E-12  6.4831E-12 -5.5536E-13  1.2759E-12  2.8439E-12  1.0425E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.323906 -125.441500   -0.281997    0.107473   -0.969248  2456809.821028
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:          305.73893 +/-     0.029
Argument of Peri:      112.36831 +/-     0.017
Long of Asc Node:      208.13062 +/-     0.001
Inclination:            13.51468 +/-     0.001
Eccentricity:         0.27734176 +/-    0.0005
Semi-Major Axis:     48.74702021 +/-    0.0139
Time of Perihelion: 2475537.7725 +/-       6.0
Perihelion:          35.22743582 +/-    0.0249
Aphelion:            62.26660461 +/-    0.0289
Period (y)              340.3536 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -25.09043896 +/-    0.0005
Ecliptic Y          -35.73460149 +/-    0.0007
Ecliptic Z            4.73098188 +/-    0.0001
Ecliptic XDOT         0.00254162 +/-    0.0000
Ecliptic YDOT        -0.00085184 +/-    0.0000
Ecliptic ZDOT         0.00046857 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.91894876 +/-    0.0006
Geocenter to KBO     42.94907168 +/-    0.0008
# Hcoef:  7.64

The following table shows the complete astrometric record for 15KW174. 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 (15KW174) followed by the observatory code and reference code for the source of the astrometry.

2014 06  01.32025  15 35 05.951  -12 46 12.56  24.0r 15KW174   568  C~2lVL      
2014 06  01.36329  15 35 05.760  -12 46 11.97  23.9r 15KW174   568  C~2lVL      
2014 06  22.31762  15 33 41.298  -12 41 36.30  23.9r 15KW174   568  C~2lVL      
2014 06  22.36048  15 33 41.143  -12 41 36.03  24.1r 15KW174   568  C~2lVL      
2014 07  19.33364  15 32 28.186  -12 39 04.81  24.4r 15KW174   568  C~2lVL      
2015 02  23.63607  15 45 21.592  -13 17 08.51  24.1r 15KW174   568  C~2lVL      
2015 03  19.59543  15 45 03.821  -13 11 32.82  23.2r 15KW174   568  C~2lVL      
2015 03  22.51769  15 44 58.209  -13 10 42.62  24.3r 15KW174   568  C~2lVL      
2015 04  18.53589  15 43 36.705  -13 02 01.96  23.9r 15KW174   568  C~2lVL      
2015 05  21.32647  15 41 13.666  -12 51 15.73  24.0r 15KW174   568  C~2lVL      
2015 05  21.36772  15 41 13.464  -12 51 14.90  24.1r 15KW174   568  C~2lVL      
2015 05  21.40894  15 41 13.276  -12 51 14.25  24.1r 15KW174   568  C~2lVL      
2015 05  22.48541  15 41 08.308  -12 50 55.03  24.0r 15KW174   568  C~2lVL      
2015 05  25.47599  15 40 54.610  -12 50 02.80  24.1r 15KW174   568  C~2lVL      
2015 06  20.36530  15 39 04.482  -12 43 56.82  24.2r 15KW174   568  C~2lVL      
2015 06  20.40617  15 39 04.328  -12 43 56.26  24.0r 15KW174   568  C~2lVL      
2015 06  23.42643  15 38 53.165  -12 43 25.66  24.1r 15KW174   568  C~2lVL      
2015 07  11.29956  15 37 58.267  -12 41 25.10  24.3r 15KW174   568  C~2lVL      
2015 07  11.30916  15 37 58.240  -12 41 24.99  24.0r 15KW174   568  C~2lVL      
2015 07  18.36957  15 37 42.628  -12 41 07.34  24.1r 15KW174   568  C~2lVL      
2016 02  12.61871  15 50 26.349  -13 20 07.39  24.2w 15KW174   568  C~2lVL      
2016 03  17.61801  15 50 25.051  -13 13 10.50  24.2w 15KW174   568  C~2lVL      
2016 03  17.63019  15 50 25.045  -13 13 10.28  24.8w 15KW174   568  C~2lVL      
2016 03  17.64294  15 50 25.016  -13 13 10.07  24.2w 15KW174   568  C~2lVL      
2016 04  03.57496  15 49 46.258  -13 08 05.02  23.7w 15KW174   568  C~2lVL      
2016 04  08.62452  15 49 30.566  -13 06 26.65  24.1w 15KW174   568  C~2lVL      
2016 04  09.56848  15 49 27.459  -13 06 08.00  24.1w 15KW174   568  C~2lVL      
2016 04  29.50952  15 48 10.472  -12 59 26.92  24.1w 15KW174   568  C~2lVL      
2016 05  04.48214  15 47 48.743  -12 57 48.05  24.2w 15KW174   568  C~2lVL      
2016 05  30.45796  15 45 49.763  -12 49 59.32  24.2w 15KW174   568  C~2lVL      
2016 07  04.31842  15 43 33.225  -12 43 33.68  24.4w 15KW174   568  C~2lVL      
2016 07  05.39078  15 43 30.026  -12 43 27.78  24.3w 15KW174   568  C~2lVL      
2017 03  28.60754  15 55 27.365  -13 10 57.48  23.9w 15KW174   568  C~2lVL      
2017 07  28.31662  15 48 02.202  -12 44 14.34        15KW174   568  C~2lVL      

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    -0.05       0.00     0.04
     2   0.0001     -2.85    -0.01      -0.09    -0.04
     3   0.0575  -1268.77     0.01     -25.37     0.05
     4   0.0576  -1271.04     0.07     -25.65    -0.10
     5   0.1315  -2344.09    -0.01    -133.33    -0.01
     6   0.7319   9188.13     0.03     278.72    -0.14
     7   0.7975   8858.65    -0.23     547.04    -0.11
     8   0.8055   8767.27    -0.01     577.34    -0.03
     9   0.8794   7487.28    -0.09     813.20    -0.12
    10   0.9692   5301.58     0.26     962.00     0.05
    11   0.9693   5298.51     0.10     962.12     0.12
    12   0.9694   5295.68     0.19     962.12     0.05
    13   0.9724   5220.50    -0.02     964.05     0.02
    14   0.9806   5013.40     0.00     968.59     0.04
    15   1.0515   3360.76    -0.02     950.90    -0.03
    16   1.0516   3358.44    -0.00     950.92     0.10
    17   1.0598   3192.43    -0.09     942.63     0.04
    18   1.1088   2383.01     0.05     872.34    -0.00
    19   1.1088   2382.60    -0.01     872.36     0.06
    20   1.1281   2156.32    -0.19     836.06     0.11
    21   1.7010  13577.10     0.09    1103.64    -0.04
    22   1.7941  13465.75    -0.14    1506.80     0.02
    23   1.7941  13465.61     0.06    1507.00     0.08
    24   1.7942  13465.15    -0.04    1507.11     0.06
    25   1.8405  12842.96    -0.00    1678.95    -0.04
    26   1.8544  12596.64    -0.05    1723.83    -0.07
    27   1.8569  12548.06     0.04    1731.90    -0.03
    28   1.9115  11357.88    -0.01    1871.35     0.02
    29   1.9252  11025.20     0.06    1896.42    -0.02
    30   1.9963   9220.24     0.01    1960.54     0.04
    31   2.0917   7184.21    -0.03    1881.21     0.01
    32   2.0946   7137.24     0.05    1876.25    -0.01
    33   2.8235  17769.10     0.03    2610.44    -0.08
    34   3.1567  11034.67    -0.05    2734.85    -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.

15KW174    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        48.549    48.586    48.512
ecceobj         0.280     0.281     0.279
incobj         13.566    13.566    13.566
qmin           34.585    34.475    34.568
qmax           63.613    64.081    64.272
amean          48.817    48.878    48.977
amin           48.236    48.268    48.374
amax           49.428    49.510    49.735
emean           0.273     0.276     0.276
emin            0.256     0.260     0.258
emax            0.288     0.294     0.294
imean          14.613    14.464    14.514
imin           13.725    13.568    13.631
imax           15.351    15.241    15.276
excite_mean     0.372     0.372     0.373
fracstop        1.000     1.000     1.000
cjmean          2.987     2.987     2.988

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       178.6     178.7     179.3
kozaiamp        179.9     179.9     180.0