Orbit Fit and Astrometric record for 04KB19

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: 04KB19    
# Created Fri Dec 15 02:37:18 2017
# Orbit generated from Bernstein formalism
# Fitting   19 observations of   19
# Arc:  10.89y
# First observation: 2004/05/24
#  Last observation: 2015/04/15
Preliminary a, adot, b, bdot, g, gdot:
  -0.001590   0.026714   0.000546  -0.008247   0.027849   0.000000
# Chi-squared of fit:    13.73 DOF:   32 RMS:  0.15
# Min/Max residuals:    -0.31    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.466085E-05  2.419465E-02 -5.072043E-06 -7.472192E-03  2.597067E-02 -5.868360E-03
# Covariance matrix:
  2.1114E-13 -1.3172E-13 -2.0843E-14  3.0251E-14  1.9822E-13 -3.2500E-13
 -1.3172E-13  1.7497E-13  3.3140E-14 -4.8935E-14 -1.9033E-14  5.2479E-13
 -2.0843E-14  3.3140E-14  1.1537E-13 -2.2672E-14  1.8534E-14  1.0714E-13
  3.0251E-14 -4.8935E-14 -2.2672E-14  1.9511E-14 -3.2408E-14 -1.5934E-13
  1.9822E-13 -1.9033E-14  1.8534E-14 -3.2408E-14  1.7748E-12  3.4200E-13
 -3.2500E-13  5.2479E-13  1.0714E-13 -1.5934E-13  3.4200E-13  1.7075E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.137090 -132.850931   -0.288494   -0.019213   -0.970622  2453149.855313
# Heliocentric elements and errors
Epoch:              2453140.5000  =  2004/05/15
Mean Anomaly:          283.02499 +/-     0.030
Argument of Peri:      285.63765 +/-     0.041
Long of Asc Node:       43.96137 +/-     0.000
Inclination:            17.13306 +/-     0.000
Eccentricity:         0.21658313 +/-    0.0001
Semi-Major Axis:     39.57569641 +/-    0.0083
Time of Perihelion: 2472584.6294 +/-       4.6
Perihelion:          31.00426807 +/-    0.0068
Aphelion:            48.14712474 +/-    0.0102
Period (y)              248.9723 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.63406812 +/-    0.0013
Ecliptic Y          -29.12986780 +/-    0.0014
Ecliptic Z           -0.76428443 +/-    0.0000
Ecliptic XDOT         0.00229854 +/-    0.0000
Ecliptic YDOT        -0.00127671 +/-    0.0000
Ecliptic ZDOT        -0.00077517 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.47792945 +/-    0.0014
Geocenter to KBO     38.50497557 +/-    0.0020
# Hcoef:  7.66

The following table shows the complete astrometric record for 04KB19. 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 (04KB19) followed by the observatory code and reference code for the source of the astrometry.

2004 05  24.35457  14 57 22.96   -18 02 43.4   23.8g 04KB19    568  C~0Uqx      
2004 05  24.37701  14 57 22.84   -18 02 42.8   23.6g 04KB19    568  C~0Uqx      
2004 05  24.40204  14 57 22.69   -18 02 42.7   23.7g 04KB19    568  C~0Uqx      
2004 05  25.36346  14 57 17.91   -18 02 25.7         04KB19    568  C~0Uqx      
2004 06  10.26858  14 56 03.51   -17 58 07.5   23.2i 04KB19    568  C~0Uqx      
2004 06  10.33325  14 56 03.21   -17 58 06.5   23.3i 04KB19    568  C~0Uqx      
2004 06  10.40473  14 56 02.91   -17 58 05.4   23.4i 04KB19    568  C~0Uqx      
2005 05  14.37712  15 03 25.16   -18 54 03.8   23.3r 04KB19    568  C~0Uqx      
2005 05  14.41084  15 03 24.98   -18 54 03.3   23.0r 04KB19    568  C~0Uqx      
2005 05  14.44970  15 03 24.77   -18 54 02.5   23.2r 04KB19    568  C~0Uqx      
2005 07  08.30276  14 59 34.85   -18 41 02.7   22.4r 04KB19    568  C~0Uqx      
2005 07  08.35417  14 59 34.72   -18 41 02.2   22.5r 04KB19    568  C~0Uqx      
2006 05  26.37447  15 07 38.85   -19 39 02.4   23.4r 04KB19    568  C~0Uqx      
2006 05  26.40813  15 07 38.69   -19 39 01.8   23.4r 04KB19    568  C~0Uqx      
2006 05  26.44157  15 07 38.50   -19 39 01.3   23.4r 04KB19    568  C~0Uqx      
2006 05  27.45215  15 07 33.29   -19 38 44.3         04KB19    568  C~0Uqx      
2015 04  15.39319  16 04 30.01   -26 52 35.0   23.1R 04KB19    695  C~1RHU      
2015 04  15.43094  16 04 29.86   -26 52 35.0         04KB19    695  C~1RHU      
2015 04  15.46933  16 04 29.65   -26 52 35.2         04KB19    695  C~1RHU      

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     0.11
  2   0.0001     -1.81    -0.11       0.09     0.29
  3   0.0001     -3.89    -0.31      -0.42    -0.12
  4   0.0028    -74.08     0.29      -3.53     0.33
  5   0.0463  -1164.99     0.17     -59.01    -0.02
  6   0.0465  -1169.38    -0.08     -59.28    -0.05
  7   0.0467  -1173.80     0.07     -59.45     0.03
  8   0.9720   5811.87     0.02   -1511.44    -0.04
  9   0.9721   5809.28     0.09   -1511.66    -0.11
 10   0.9722   5806.19     0.07   -1511.72     0.00
 11   1.1224   2451.84     0.07   -1673.86    -0.05
 12   1.1225   2449.92    -0.05   -1673.90     0.03
 13   2.0042  10012.06    -0.23   -3126.72    -0.10
 14   2.0043  10009.71     0.00   -3126.76    -0.00
 15   2.0043  10006.99    -0.16   -3127.00    -0.13
 16   2.0071   9931.35     0.11   -3130.53    -0.27
 17  10.8913  63672.88    -0.05  -18456.59     0.12
 18  10.8914  63670.71     0.27  -18456.94     0.15
 19  10.8915  63667.72    -0.19  -18457.62    -0.17

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.

04KB19    quality flag:3

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

axisobj        39.298    39.322    39.274
ecceobj         0.221     0.221     0.221
incobj         17.211    17.211    17.211
qmin           27.456    27.680    27.391
qmax           51.947    51.949    52.035
amean          39.454    39.455    39.454
amin           39.054    39.034    39.072
amax           39.942    39.983    39.920
emean           0.249     0.248     0.249
emin            0.197     0.194     0.196
emax            0.302     0.299     0.305
imean          14.189    14.271    14.140
imin           11.258    11.633    11.040
imax           16.871    16.844    16.894
excite_mean     0.352     0.352     0.352
fracstop        1.000     1.000     1.000
cjmean          2.911     2.911     2.911

libcent 0       179.9     179.6     180.2
libamp  0        63.2      74.6      49.0
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       270.3     270.6     269.9
kozaiamp         52.9      54.4      51.1