Orbit Fit and Astrometric record for 15KH163

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: 15KH163   
# Created Wed Dec 13 02:38:11 2017
# Orbit generated from Bernstein formalism
# Fitting   35 observations of   36
# Arc:   2.97y
# First observation: 2014/06/01
#  Last observation: 2017/05/21
Preliminary a, adot, b, bdot, g, gdot:
  -0.000269   0.018001   0.000113  -0.008943   0.019433   0.000000
# Chi-squared of fit:    17.19 DOF:   64 RMS:  0.12
# Min/Max residuals:    -0.32    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.358068E-05  1.746166E-02 -7.305353E-06 -8.726012E-03  1.951074E-02 -9.836580E-03
# Covariance matrix:
  2.0125E-13 -2.0926E-13 -2.7661E-14  5.9835E-14 -4.8523E-14 -2.3184E-12
 -2.0926E-13  3.5029E-13  5.8034E-14 -1.2642E-13  6.9885E-14  4.8932E-12
 -2.7661E-14  5.8034E-14  1.5013E-13 -1.0077E-13  2.5770E-14  1.0185E-12
  5.9835E-14 -1.2642E-13 -1.0077E-13  1.1406E-13 -5.0938E-14 -2.1972E-12
 -4.8523E-14  6.9885E-14  2.5770E-14 -5.0938E-14  2.1949E-13  2.0010E-12
 -2.3184E-12  4.8932E-12  1.0185E-12 -2.1972E-12  2.0010E-12  8.5166E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    5.857812 -124.037273   -0.258345    0.100250   -0.976593  2456809.840788
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:          352.13693 +/-     0.021
Argument of Peri:      230.75403 +/-     0.025
Long of Asc Node:       67.55563 +/-     0.000
Inclination:            27.16756 +/-     0.001
Eccentricity:         0.73665856 +/-    0.0006
Semi-Major Axis:    151.84623730 +/-    0.2745
Time of Perihelion: 2471728.2346 +/-       1.0
Perihelion:          39.98740733 +/-    0.1115
Aphelion:           263.70506727 +/-    0.4843
Period (y)             1871.1743 +/-      5.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -28.87531364 +/-    0.0007
Ecliptic Y          -43.20765068 +/-    0.0010
Ecliptic Z            5.23065444 +/-    0.0001
Ecliptic XDOT         0.00272389 +/-    0.0000
Ecliptic YDOT        -0.00034087 +/-    0.0000
Ecliptic ZDOT        -0.00135884 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   52.23068601 +/-    0.0009
Geocenter to KBO     51.25382383 +/-    0.0012
# Hcoef:  7.93

The following table shows the complete astrometric record for 15KH163. 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 (15KH163) followed by the observatory code and reference code for the source of the astrometry.

2014 06  01.34001  15 40 13.907  -13 32 54.50  24.3r 15KH163   568  C~2Gu0      
2014 06  01.38290  15 40 13.738  -13 32 54.19  24.7r 15KH163   568  C~2Gu0      
2014 06  01.42581  15 40 13.546  -13 32 53.71  24.8r 15KH163   568  C~2Gu0      
2014 06  22.33713  15 38 58.705  -13 31 23.24  25.4r 15KH163   568  C~2Gu0      
2014 06  22.37998  15 38 58.534  -13 31 23.15  25.4r 15KH163   568  C~2Gu0      
2014 07  19.35399  15 37 51.062  -13 32 04.08  26.0r 15KH163   568  C~2Gu0      
2015 03  19.57896  15 47 55.667  -14 26 27.16  25.3r 15KH163   568  C~2Gu0      
2015 03  21.63764  15 47 52.198  -14 26 14.01  24.9r 15KH163   568  C~2Gu0      
2015 04  12.49631  15 46 58.445  -14 23 24.39  25.0r 15KH163   568  C~2Gu0      
2015 04  12.53727  15 46 58.313  -14 23 24.23  24.3r 15KH163   568  C~2Gu0      
2015 04  18.51897  15 46 39.045  -14 22 30.17  24.7r 15KH163   568  C~2Gu0      
2015 05  17.39179  15 44 49.665  -14 18 05.57  24.5r 15KH163   568  C~2Gu0      
2015 05  17.43344  15 44 49.484  -14 18 05.26  25.1r 15KH163   568  C~2Gu0      
2015 05  17.48044  15 44 49.297  -14 18 04.82  24.6r 15KH163   568  C~2Gu0      
2015 05  17.51054  15 44 49.151  -14 18 04.53  25.3r 15KH163   568  C~2Gu0      
2015 05  24.37741  15 44 21.469  -14 17 09.53  25.1r 15KH163   568  C~2Gu0      
2015 05  24.42349  15 44 21.276  -14 17 09.17  24.9r 15KH163   568  C~2Gu0      
2015 05  24.46441  15 44 21.109  -14 17 08.90  24.6r 15KH163   568  C~2Gu0      
2015 05  26.45236  15 44 13.126  -14 16 54.16  24.9r 15KH163   568  C~2Gu0      
2015 06  18.35156  15 42 46.341  -14 14 49.29  24.9r 15KH163   568  C~2Gu0      
2015 06  18.39254  15 42 46.198  -14 14 49.10  24.7r 15KH163   568  C~2Gu0      
2015 07  18.32574  15 41 24.657  -14 15 02.06  24.9r 15KH163   568  C~2Gu0      
2016 02  06.65744  15 51 35.123  -15 10 07.58  25.1w 15KH163   568  C~2Gu0      
2016 02  12.64299  15 51 43.920  -15 10 30.52  24.4w 15KH163   568  C~2Gu0      
2016 03  17.62613  15 51 39.062  -15 09 50.78  24.4w 15KH163   568  C~2Gu0      
2016 04  08.61643  15 50 50.119  -15 07 26.92  25.3w 15KH163   568  C~2Gu0      
2016 04  09.56037  15 50 47.356  -15 07 19.25  25.7w 15KH163   568  C~2Gu0      
2016 04  29.52981  15 49 39.209  -15 04 27.67  24.9w 15KH163   568  C~2Gu0      
2016 05  04.50238  15 49 20.050  -15 03 43.73        15KH163   568  C~2Gu0      
2016 05  30.44581  15 47 35.189  -15 00 17.79  24.7w 15KH163   568  C~2Gu0      
2016 07  04.32652  15 45 33.097  -14 58 18.98  25.0w 15KH163   568  C~2Gu0      
2016 07  05.39888  15 45 30.182  -14 58 19.79  26.0w 15KH163   568  C~2Gu0      
2017 04  03.61140  15 54 52.943  -15 52 14.19  25.4w 15KH163   568  C~2Gu0      
2017 04  03.61609  15 54 52.921  -15 52 14.35  25.4w 15KH163   568  C~2Gu0      
2017 04  04.49990  15 54 50.615  -15 52 08.45  25.1w 15KH163   568  C~2Gu0      
2017 05  21.53807  15 52 00.035  -15 45 57.62  24.6w 15KH163   568  C~2Gu0      

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     0.12       0.00     0.05
  2   0.0001     -2.47     0.11      -0.26     0.08
  3   0.0002     -5.31    -0.27      -0.44     0.20
  4   0.0575  -1088.36     0.31    -163.03    -0.07
  5   0.0576  -1090.80    -0.12    -163.52    -0.17
  6   0.1315  -2038.84     0.09    -430.49    -0.06
  7   0.7974   7274.58     0.09   -1617.99    -0.11
  8   0.8030   7222.47 (   0.14)  -1616.30 (   0.47)
  9   0.8629   6422.48    -0.22   -1623.88     0.24
 10   0.8630   6420.57    -0.21   -1624.15     0.03
 11   0.8793   6135.32     0.09   -1633.64    -0.16
 12   0.9584   4525.67     0.06   -1730.68     0.13
 13   0.9585   4523.03    -0.07   -1730.97     0.06
 14   0.9586   4520.28     0.00   -1731.15     0.12
 15   0.9587   4518.15    -0.32   -1731.34     0.08
 16   0.9775   4113.51     0.03   -1768.08    -0.00
 17   0.9776   4110.70    -0.04   -1768.36    -0.01
 18   0.9778   4108.27    -0.02   -1768.64    -0.05
 19   0.9832   3991.83     0.03   -1780.37    -0.18
 20   1.0459   2734.19    -0.11   -1943.40    -0.05
 21   1.0460   2732.12    -0.10   -1943.69     0.01
 22   1.1280   1580.38     0.11   -2225.55    -0.12
 23   1.6846  10962.01     0.16   -3480.64     0.04
 24   1.7010  11091.69     0.20   -3475.45    -0.23
 25   1.7941  11014.17     0.14   -3451.84    -0.03
 26   1.8543  10289.17     0.03   -3465.20    -0.03
 27   1.8569  10248.35     0.02   -3466.42     0.12
 28   1.9115   9245.42    -0.03   -3514.30     0.08
 29   1.9252   8964.46    -0.02   -3532.20     0.02
 30   1.9962   7434.74    -0.05   -3665.72    -0.15
 31   2.0917   5681.54     0.05   -3943.02     0.14
 32   2.0946   5640.52     0.16   -3953.24    -0.08
 33   2.8399  14312.29     0.09   -5339.58     0.16
 34   2.8399  14312.01    -0.00   -5339.80    -0.06
 35   2.8423  14278.07    -0.19   -5341.11    -0.03
 36   2.9711  11783.40    -0.09   -5506.09     0.00

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.

15KH163    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       150.846   151.614   150.088
ecceobj         0.736     0.738     0.735
incobj         27.211    27.211    27.211
qmin           38.477    37.894    38.085
qmax          280.102   281.920   277.813
amean         153.501   153.747   152.447
amin          149.470   149.278   148.620
amax          160.031   160.637   158.786
emean           0.739     0.742     0.740
emin            0.729     0.731     0.729
emax            0.750     0.755     0.751
imean          25.963    25.459    25.524
imin           25.637    25.023    25.186
imax           26.351    26.349    26.223
excite_mean     0.859     0.858     0.856
fracstop        1.000     1.000     1.000
cjmean          2.930     2.929     2.931

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       252.8     271.6     263.1
kozaiamp         30.2      40.1      33.4