Orbit Fit and Astrometric record for 15KS174

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: 15KS174   
# Created Mon Dec  6 02:13:22 2021
# Orbit generated from Bernstein formalism
# Fitting     34 observations of     34
# Arc:   2.51y
# First observation: 2015/02/20
#  Last observation: 2017/08/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000105   0.052092  -0.000013  -0.003477   0.039297   0.000000
# Chi-squared of fit:    10.66 DOF:     62 RMS:  0.10
# Min/Max residuals:    -0.30    0.22
# Exact a, adot, b, bdot, g, gdot:
  2.106331E-05  5.163550E-02 -1.325355E-06 -3.512049E-03  3.869387E-02  7.462242E-03
# Covariance matrix:
  1.6295E-13 -1.1324E-13 -8.5299E-15  1.0716E-14  5.9527E-14 -1.1625E-12
 -1.1324E-13  7.3423E-13  1.5425E-14 -7.2406E-14  2.3184E-13  9.9317E-12
 -8.5299E-15  1.5425E-14  9.0103E-14 -6.2982E-14 -2.7115E-15  2.7203E-13
  1.0716E-14 -7.2406E-14 -6.2982E-14  8.6652E-14 -2.0083E-14 -1.1223E-12
  5.9527E-14  2.3184E-13 -2.7115E-15 -2.0083E-14  1.6931E-13  3.0987E-12
 -1.1625E-12  9.9317E-12  2.7203E-13 -1.1223E-12  3.0987E-12  1.5232E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.045439 -125.545980    0.978599    0.012712   -0.118792  2457074.153358
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:           21.31890 +/-     0.030
Argument of Peri:       87.01733 +/-     0.054
Long of Asc Node:      110.94214 +/-     0.002
Inclination:             7.03041 +/-     0.000
Eccentricity:         0.22831679 +/-    0.0002
Semi-Major Axis:     32.59215075 +/-    0.0040
Time of Perihelion: 2453045.8297 +/-       5.6
Perihelion:          25.15081551 +/-    0.0069
Aphelion:            40.03348599 +/-    0.0078
Period (y)              186.0706 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -15.80923032 +/-    0.0002
Ecliptic Y          -20.43894790 +/-    0.0002
Ecliptic Z            2.72178224 +/-    0.0000
Ecliptic XDOT         0.00264862 +/-    0.0000
Ecliptic YDOT        -0.00257812 +/-    0.0000
Ecliptic ZDOT        -0.00019142 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   25.98250283 +/-    0.0002
Geocenter to KBO     25.84388830 +/-    0.0003
# Hcoef: 10.56

The following table shows the complete astrometric record for 15KS174. 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 (15KS174) followed by the observatory code and reference code for the source of the astrometry.

2015 02  20.65258  15 34 24.861  -13 00 57.90  24.9r 15KS174   568  C~2lVK      
2015 03  19.58718  15 33 59.057  -12 53 58.55  24.3r 15KS174   568  C~2lVK      
2015 03  21.64578  15 33 52.653  -12 53 13.62  24.7r 15KS174   568  C~2lVK      
2015 04  12.50451  15 32 12.570  -12 44 04.70  24.1r 15KS174   568  C~2lVK      
2015 04  12.54547  15 32 12.311  -12 44 03.66  25.2r 15KS174   568  C~2lVK      
2015 04  18.52716  15 31 36.302  -12 41 18.83  24.6r 15KS174   568  C~2lVK      
2015 05  17.37006  15 28 14.704  -12 28 22.74  24.5r 15KS174   568  C~2lVK      
2015 05  17.41677  15 28 14.351  -12 28 21.51  24.3r 15KS174   568  C~2lVK      
2015 05  17.45892  15 28 14.042  -12 28 20.83  24.6r 15KS174   568  C~2lVK      
2015 05  24.36087  15 27 23.823  -12 25 38.62  25.2r 15KS174   568  C~2lVK      
2015 05  24.40713  15 27 23.483  -12 25 37.47  24.3r 15KS174   568  C~2lVK      
2015 05  24.44802  15 27 23.188  -12 25 36.74  24.5r 15KS174   568  C~2lVK      
2015 05  26.43568  15 27 08.913  -12 24 52.82  24.3r 15KS174   568  C~2lVK      
2015 06  18.33508  15 24 38.698  -12 18 29.48  24.7r 15KS174   568  C~2lVK      
2015 06  18.37614  15 24 38.453  -12 18 28.69  24.6r 15KS174   568  C~2lVK      
2015 06  21.35078  15 24 21.770  -12 17 57.94  24.5r 15KS174   568  C~2lVK      
2015 07  15.30645  15 22 42.483  -12 16 56.26  25.3r 15KS174   568  C~2lVK      
2015 07  17.33708  15 22 37.337  -12 17 07.32  24.4r 15KS174   568  C~2lVK      
2015 07  18.30854  15 22 35.072  -12 17 13.33  25.0r 15KS174   568  C~2lVK      
2016 02  06.62103  15 45 20.785  -13 54 16.34  25.3w 15KS174   568  C~2lVK      
2016 02  06.62508  15 45 20.802  -13 54 16.51  25.5w 15KS174   568  C~2lVK      
2016 02  12.61062  15 45 40.773  -13 54 10.96  24.6w 15KS174   568  C~2lVK      
2016 04  03.54259  15 44 47.862  -13 41 54.73  25.1w 15KS174   568  C~2lVK      
2016 04  03.55474  15 44 47.803  -13 41 54.42  24.9w 15KS174   568  C~2lVK      
2016 04  08.59215  15 44 23.092  -13 39 53.59  25.1w 15KS174   568  C~2lVK      
2016 04  29.47374  15 42 15.596  -13 31 03.03  24.9w 15KS174   568  C~2lVK      
2016 05  04.40882  15 41 41.207  -13 28 57.49  24.9w 15KS174   568  C~2lVK      
2016 05  30.48224  15 38 32.012  -13 19 04.50  24.7w 15KS174   568  C~2lVK      
2016 07  04.28603  15 35 04.668  -13 12 25.36  24.8w 15KS174   568  C~2lVK      
2016 07  05.37863  15 34 59.980  -13 12 22.91  25.1w 15KS174   568  C~2lVK      
2017 05  21.53337  15 51 33.599  -14 15 11.61  25.0w 15KS174   568  C~2lVK      
2017 08  19.27489  15 45 33.732  -14 12 13.67        15KS174   568  C~2lVK      
2017 08  25.27821  15 45 46.106  -14 14 25.29  26.0w 15KS174   568  C~2lVK      
2017 08  26.25868  15 45 48.642  -14 14 48.35  24.9w 15KS174   568  C~2lVK      

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     0.01       0.00    -0.02
     2   0.0737   -466.02     0.13     317.74    -0.05
     3   0.0794   -567.66    -0.06     339.11    -0.02
     4   0.1392  -2120.32    -0.07     522.84     0.15
     5   0.1393  -2124.24    -0.30     522.95     0.01
     6   0.1557  -2675.37     0.03     556.67     0.14
     7   0.2347  -5728.13    -0.01     596.95     0.00
     8   0.2348  -5733.45    -0.10     596.88     0.07
     9   0.2349  -5738.01     0.06     596.44    -0.25
    10   0.2538  -6491.60    -0.04     574.67    -0.05
    11   0.2539  -6496.72    -0.07     574.58     0.07
    12   0.2541  -6501.09     0.06     574.23    -0.09
    13   0.2595  -6714.82    -0.06     565.80     0.11
    14   0.3222  -8945.83     0.09     397.57    -0.24
    15   0.3223  -8949.51    -0.03     397.45     0.07
    16   0.3305  -9194.52    -0.02     366.95    -0.05
    17   0.3960 -10622.99     0.11      66.34     0.22
    18   0.4016 -10693.49     0.16      36.86    -0.02
    19   0.4043 -10724.24     0.02      22.78     0.03
    20   0.9609  10057.44     0.06    -891.86     0.04
    21   0.9609  10057.72     0.13    -891.97    -0.12
    22   0.9773  10340.39     0.03    -820.68     0.07
    23   1.1167   9420.66    -0.01    -277.65    -0.08
    24   1.1168   9419.75    -0.03    -277.55    -0.06
    25   1.1306   9040.81    -0.10    -241.72    -0.07
    26   1.1877   7106.88    -0.01    -150.14     0.01
    27   1.2012   6589.30     0.15    -143.32    -0.06
    28   1.2726   3764.55    -0.03    -206.47     0.20
    29   1.3679    727.92    -0.04    -530.03     0.04
    30   1.3709    660.82     0.04    -543.86    -0.06
    31   2.2474  15647.00     0.16    -904.57    -0.04
    32   2.4931  10486.07    -0.19   -1899.94    -0.07
    33   2.5096  10691.66    -0.05   -1987.65     0.05
    34   2.5123  10732.91    -0.01   -2001.81     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.

15KS174    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        32.323    32.345    32.301
ecceobj         0.222     0.222     0.221
incobj          7.027     7.027     7.027
qmin           24.684    23.740    24.859
qmax           39.700    41.504    39.430
amean          32.094    31.930    32.172
amin           31.799    30.733    32.025
amax           32.361    33.390    32.300
emean           0.223     0.235     0.223
emin            0.216     0.217     0.221
emax            0.228     0.246     0.225
imean           5.354     3.189     5.455
imin            5.166     1.116     5.451
imax            5.451     5.451     5.462
excite_mean     0.242     0.242     0.242
fracstop        0.001     0.008     0.000
cjmean          2.942     2.941     2.942

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        89.5     167.5      87.5
kozaiamp          3.2      92.0       0.6