Orbit Fit and Astrometric record for 03HG57

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: 03HG57    
# Created Mon Oct 23 01:37:23 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   22
# Arc:  12.07y
# First observation: 2003/04/26
#  Last observation: 2015/05/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000592   0.023621   0.000023  -0.000826   0.023583   0.000000
# Chi-squared of fit:    25.88 DOF:   34 RMS:  0.20
# Min/Max residuals:    -0.43    0.48
# Exact a, adot, b, bdot, g, gdot:
  1.615121E-05  2.296444E-02 -1.040409E-06 -8.024222E-04  2.380116E-02 -8.273321E-04
# Covariance matrix:
  1.8172E-13 -8.5590E-14 -1.5853E-15  2.5185E-15  8.9939E-14 -2.6191E-13
 -8.5590E-14  9.9500E-14  2.2282E-15 -3.3569E-15 -6.0176E-14  3.4813E-13
 -1.5853E-15  2.2282E-15  1.2101E-13 -1.2737E-14 -5.5384E-16  8.1008E-15
  2.5185E-15 -3.3569E-15 -1.2737E-14  3.4100E-15  1.8872E-15 -1.2157E-14
  8.9939E-14 -6.0176E-14 -5.5384E-16  1.8872E-15  3.9622E-13 -2.0158E-13
 -2.6191E-13  3.4813E-13  8.1008E-15 -1.2157E-14 -2.0158E-13  1.2604E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.631546 -161.194500   -0.296631    0.010603   -0.962299  2452755.856463
# Heliocentric elements and errors
Epoch:              2452750.5000  =  2003/04/21
Mean Anomaly:          305.71593 +/-     0.155
Argument of Peri:      220.14835 +/-     0.168
Long of Asc Node:       36.33351 +/-     0.001
Inclination:             2.09419 +/-     0.000
Eccentricity:         0.03184561 +/-    0.0000
Semi-Major Axis:     43.76255429 +/-    0.0051
Time of Perihelion: 2468695.4182 +/-      45.5
Perihelion:          42.36890883 +/-    0.0054
Aphelion:            45.15619974 +/-    0.0057
Period (y)              289.5091 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -40.58679861 +/-    0.0011
Ecliptic Y          -14.13030956 +/-    0.0004
Ecliptic Z            0.46307970 +/-    0.0000
Ecliptic XDOT         0.00093449 +/-    0.0000
Ecliptic YDOT        -0.00247517 +/-    0.0000
Ecliptic ZDOT        -0.00009316 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.97869603 +/-    0.0010
Geocenter to KBO     42.01476093 +/-    0.0011
# Hcoef:  6.49

The following table shows the complete astrometric record for 03HG57. 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 (03HG57) followed by the observatory code and reference code for the source of the astrometry.

2003 04  26.35572  13 10 22.10   -06 46 58.0   22.1R 03HG57    568  Cq9883      
2003 04  26.40073  13 10 21.90   -06 46 57.0   22.0R 03HG57    568  Cq9883      
2003 04  26.44299  13 10 21.72   -06 46 55.9   22.1R 03HG57    568  Cq9883      
2003 04  27.40999  13 10 17.64   -06 46 32.2         03HG57    568  Cq9883      
2003 05  30.30762  13 08 23.01   -06 35 24.0   22.6R 03HG57    568  Cq9883      
2003 05  30.31870  13 08 22.98   -06 35 24.1         03HG57    568  Cq9883      
2003 05  30.36094  13 08 22.86   -06 35 23.4   22.4R 03HG57    568  Cq9883      
2003 05  30.37178  13 08 22.83   -06 35 23.4         03HG57    568  Cq9883      
2004 03  29.53822  13 17 12.45   -07 31 11.4   22.9R 03HG57    568  Cq9883      
2004 03  29.56125  13 17 12.35   -07 31 10.8   22.9R 03HG57    568  Cq9883      
2004 03  29.58969  13 17 12.21   -07 31 10.2   23.1R 03HG57    568  Cq9883      
2004 04  16.34302  13 15 53.58   -07 23 24.5         03HG57    675  Cq9883      
2004 04  16.42962  13 15 53.20   -07 23 22.2         03HG57    675  Cq9883      
2005 07  11.06434  13 17 13.71   -07 35 56.9   22.3R 03HG57    809  Cq9883      
2005 07  12.00717  13 17 14.31   -07 36 01.6   22.8R 03HG57    809  Cq9883      
2008 04  04.35296  13 36 25.15   -09 36 42.9   22.3R 03HG57    688  Cy5707      
2008 04  04.44108  13 36 24.74   -09 36 40.3         03HG57    688  Cy5707      
2013 03  13.40197  14 02 47.52   -12 18 33.3   22.3R 03HG57    G37  C~0qSU      
2013 03  13.42604  14 02 47.44   -12 18 32.9         03HG57    G37  C~0qSU      
2015 05  22.17356  14 08 01.01   -12 52 57.0   22.6R 03HG57    695  C~1hTZ      
2015 05  22.21005  14 08 00.86   -12 52 56.1         03HG57    695  C~1hTZ      
2015 05  22.26106  14 08 00.63   -12 52 55.2         03HG57    695  C~1hTZ      

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    -0.18       0.00     0.10
  2   0.0001     -3.14    -0.22      -0.20    -0.05
  3   0.0002     -6.03    -0.21      -0.20     0.00
  4   0.0029    -71.25    -0.21      -1.32    -0.43
  5   0.0930  -1904.90     0.05     -31.57     0.29
  6   0.0930  -1905.27     0.14     -31.83     0.04
  7   0.0931  -1907.19    -0.02     -31.86     0.08
  8   0.0931  -1907.60     0.02     -32.03    -0.08
  9   0.9259   6659.41 (   0.11)   -151.56 (   0.68)
 10   0.9260   6657.80 (   0.13)   -151.56 (   0.69)
 11   0.9260   6655.65    -0.02    -151.79     0.48
 12   0.9746   5395.80     0.36    -160.11    -0.24
 13   0.9749   5389.70     0.48    -160.11    -0.16
 14   2.2086   6784.19     0.18    -409.24    -0.21
 15   2.2112   6794.23    -0.09    -410.24    -0.11
 16   4.9418  25455.28    -0.01    -823.17     0.04
 17   4.9421  25448.58    -0.37    -822.95     0.32
 18   9.8810  51594.25     0.08   -1677.05     0.04
 19   9.8811  51592.93     0.10   -1677.07     0.04
 20  12.0707  56960.50     0.09   -2069.62    -0.07
 21  12.0708  56957.95     0.04   -2069.51     0.08
 22  12.0709  56954.21    -0.21   -2069.81    -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.

03HG57    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.373    43.388    43.358
ecceobj         0.030     0.030     0.030
incobj          2.103     2.103     2.103
qmin           41.729    41.716    41.702
qmax           45.804    45.851    45.761
amean          43.682    43.699    43.666
amin           43.349    43.355    43.328
amax           44.023    44.038    44.010
emean           0.024     0.024     0.025
emin            0.007     0.005     0.007
emax            0.041     0.041     0.041
imean           1.725     1.720     1.724
imin            0.951     0.936     0.944
imax            2.329     2.331     2.329
excite_mean     0.039     0.039     0.039
fracstop        1.000     1.000     1.000
cjmean          3.096     3.096     3.096

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       184.7     193.4     183.5
kozaiamp        180.0     180.0     180.0