Orbit Fit and Astrometric record for 15KS173

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: 15KS173   
# Created Tue Feb 19 02:10:34 2019
# Orbit generated from Bernstein formalism
# Fitting   31 observations of   31
# Arc:   3.24y
# First observation: 2014/05/29
#  Last observation: 2017/08/25
Preliminary a, adot, b, bdot, g, gdot:
   0.000347   0.031048   0.000220   0.018427   0.030887   0.000000
# Chi-squared of fit:    16.58 DOF:   56 RMS:  0.13
# Min/Max residuals:    -0.36    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.571092E-05  3.177964E-02  9.465781E-06  1.886709E-02  3.133027E-02  2.787593E-03
# Covariance matrix:
  2.4527E-13 -2.8908E-13  4.5826E-14 -1.0816E-13 -8.6909E-14 -2.2962E-12
 -2.8908E-13  5.6379E-13 -1.1721E-13  2.7544E-13  1.6609E-13  5.8850E-12
  4.5826E-14 -1.1721E-13  2.0028E-13 -1.7552E-13 -4.4130E-14 -1.4671E-12
 -1.0816E-13  2.7544E-13 -1.7552E-13  2.5466E-13  1.0664E-13  3.4498E-12
 -8.6909E-14  1.6609E-13 -4.4130E-14  1.0664E-13  1.9934E-13  2.1865E-12
 -2.2962E-12  5.8850E-12 -1.4671E-12  3.4498E-12  2.1865E-12  7.3636E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    5.875418 -129.027852   -0.294547    0.099441   -0.965777  2456806.859478
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:           21.74664 +/-     0.043
Argument of Peri:      339.42639 +/-     0.068
Long of Asc Node:      221.97882 +/-     0.000
Inclination:            31.16128 +/-     0.000
Eccentricity:         0.18412059 +/-    0.0002
Semi-Major Axis:     39.37433466 +/-    0.0037
Time of Perihelion: 2451349.1010 +/-      10.8
Perihelion:          32.12470912 +/-    0.0070
Aphelion:            46.62396020 +/-    0.0077
Period (y)              247.0746 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -20.37709348 +/-    0.0003
Ecliptic Y          -25.60309625 +/-    0.0004
Ecliptic Z            3.26766933 +/-    0.0001
Ecliptic XDOT         0.00210581 +/-    0.0000
Ecliptic YDOT        -0.00180952 +/-    0.0000
Ecliptic ZDOT         0.00166513 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.88498349 +/-    0.0003
Geocenter to KBO     31.91801062 +/-    0.0005
# Hcoef: 10.06

The following table shows the complete astrometric record for 15KS173. 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 (15KS173) followed by the observatory code and reference code for the source of the astrometry.

2014 05  29.35870  15 20 29.030  -12 19 32.21  24.7r 15KS173   568  C~2lVG      
2014 05  29.39755  15 20 28.793  -12 19 31.36  25.2r 15KS173   568  C~2lVG      
2014 05  29.43638  15 20 28.574  -12 19 29.79  25.3r 15KS173   568  C~2lVG      
2014 06  21.36572  15 18 32.558  -12 09 46.69  24.8r 15KS173   568  C~2lVG      
2014 06  21.40460  15 18 32.391  -12 09 45.87  25.2r 15KS173   568  C~2lVG      
2015 02  23.64434  15 35 03.189  -12 34 29.99  26.2r 15KS173   568  C~2lVG      
2015 03  19.58718  15 34 36.978  -12 23 55.48  24.6r 15KS173   568  C~2lVG      
2015 04  12.50451  15 33 09.782  -12 10 43.77  25.4r 15KS173   568  C~2lVG      
2015 04  12.54547  15 33 09.590  -12 10 42.17  24.8r 15KS173   568  C~2lVG      
2015 04  18.52716  15 32 40.447  -12 07 12.58  26.3r 15KS173   568  C~2lVG      
2015 05  17.40013  15 29 57.891  -11 50 42.27  25.0r 15KS173   568  C~2lVG      
2015 05  17.44183  15 29 57.680  -11 50 41.18  26.6r 15KS173   568  C~2lVG      
2015 05  24.38557  15 29 16.917  -11 47 04.37  24.7r 15KS173   568  C~2lVG      
2015 05  24.43166  15 29 16.670  -11 47 02.79  25.0r 15KS173   568  C~2lVG      
2015 05  24.47270  15 29 16.410  -11 47 01.72  25.1r 15KS173   568  C~2lVG      
2015 05  26.46061  15 29 04.900  -11 46 02.22  24.9r 15KS173   568  C~2lVG      
2015 06  21.37538  15 26 48.998  -11 35 15.53  24.8r 15KS173   568  C~2lVG      
2015 06  21.39181  15 26 48.929  -11 35 15.31  25.1r 15KS173   568  C~2lVG      
2015 07  11.28721  15 25 35.962  -11 30 20.41  25.2r 15KS173   568  C~2lVG      
2015 07  18.35664  15 25 19.084  -11 29 22.77  24.9r 15KS173   568  C~2lVG      
2015 08  11.34354  15 25 03.020  -11 29 14.12  25.0r 15KS173   568  C~2lVG      
2016 02  11.66311  15 42 47.212  -12 02 56.97  25.0w 15KS173   568  C~2lVG      
2016 02  12.60253  15 42 49.148  -12 02 40.25  25.5w 15KS173   568  C~2lVG      
2016 03  17.60989  15 42 45.650  -11 48 33.41  25.3w 15KS173   568  C~2lVG      
2016 04  03.53046  15 41 54.641  -11 39 21.36  25.7w 15KS173   568  C~2lVG      
2016 04  08.58000  15 41 34.147  -11 36 27.30  25.1w 15KS173   568  C~2lVG      
2016 04  29.45756  15 39 50.357  -11 24 19.24  25.2w 15KS173   568  C~2lVG      
2016 05  04.39265  15 39 22.623  -11 21 30.91  24.9w 15KS173   568  C~2lVG      
2016 05  30.47009  15 36 50.770  -11 08 04.67  25.5w 15KS173   568  C~2lVG      
2016 07  03.35835  15 34 07.085  -10 56 43.00  24.5w 15KS173   568  C~2lVG      
2017 08  25.27346  15 41 14.880  -10 22 32.48  25.4w 15KS173   568  C~2lVG      

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     0.07       0.00     0.01
  2   0.0001     -3.57    -0.05      -0.07    -0.33
  3   0.0002     -7.08    -0.10       0.63     0.08
  4   0.0630  -1800.55     0.02     126.59     0.05
  5   0.0631  -1803.13     0.09     126.75     0.08
  6   0.7400  12638.63     0.08    2331.86     0.01
  7   0.8056  12110.15    -0.16    2854.70     0.27
  8   0.8710  10673.13    -0.02    3310.40    -0.03
  9   0.8711  10670.00    -0.01    3311.26     0.15
 10   0.8875  10203.08     0.02    3409.60    -0.20
 11   0.9666   7642.20    -0.36    3780.23     0.03
 12   0.9667   7638.93     0.26    3780.52    -0.07
 13   0.9857   7004.46    -0.22    3841.77    -0.16
 14   0.9858   7000.55     0.11    3842.40     0.11
 15   0.9859   6996.58    -0.09    3842.49    -0.12
 16   0.9914   6817.85     0.05    3858.04    -0.11
 17   1.0623   4721.25     0.06    3985.01     0.13
 18   1.0624   4720.21     0.18    3984.97     0.06
 19   1.1168   3607.50    -0.03    4000.60    -0.10
 20   1.1362   3352.77     0.09    3993.81     0.10
 21   1.2019   3121.99    -0.10    3942.54     0.20
 22   1.7065  18826.79    -0.13    5816.51    -0.15
 23   1.7091  18850.67    -0.04    5839.62    -0.10
 24   1.8022  18599.40     0.28    6654.01    -0.05
 25   1.8485  17734.10     0.05    7013.21    -0.11
 26   1.8623  17397.79     0.02    7110.68     0.15
 27   1.9195  15731.30    -0.05    7452.68     0.01
 28   1.9330  15292.34     0.07    7517.99    -0.14
 29   2.0044  12917.41    -0.05    7759.57     0.05
 30   2.0972  10404.38     0.01    7831.34     0.19
 31   3.2414  16062.14    -0.07   11370.02    -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.

15KS173    quality flag:3

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

axisobj        39.142    39.156    39.129
ecceobj         0.179     0.179     0.178
incobj         31.230    31.230    31.230
qmin           30.794    30.799    30.873
qmax           48.457    48.435    48.422
amean          39.454    39.454    39.454
amin           39.114    39.131    39.107
amax           39.839    39.832    39.849
emean           0.169     0.167     0.169
emin            0.111     0.109     0.111
emax            0.219     0.218     0.216
imean          32.209    32.241    32.196
imin           31.326    31.292    31.377
imax           33.048    33.070    33.024
excite_mean     0.560     0.560     0.560
fracstop        1.000     1.000     1.000
cjmean          2.671     2.670     2.671

libcent 0       179.5     179.5     180.1
libamp  0        55.6      48.7      64.0
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       183.5     185.4     180.8
kozaiamp        180.0     180.0     180.0