Orbit Fit and Astrometric record for 04DG77

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: 04DG77    
# Created Sat Oct 21 01:37:28 2017
# Orbit generated from Bernstein formalism
# Fitting   11 observations of   11
# Arc:  11.05y
# First observation: 2004/02/27
#  Last observation: 2015/03/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000277   0.014139   0.000248  -0.015533   0.022075   0.000000
# Chi-squared of fit:    11.28 DOF:   16 RMS:  0.18
# Min/Max residuals:    -0.30    0.33
# Exact a, adot, b, bdot, g, gdot:
  8.673836E-06  1.351186E-02 -1.100069E-05 -1.482376E-02  2.227966E-02 -2.387241E-03
# Covariance matrix:
  4.3669E-13 -1.8057E-13 -6.1866E-14  1.8267E-13  6.0068E-13 -1.0388E-12
 -1.8057E-13  3.9865E-13  1.5282E-13 -4.4783E-13 -6.9147E-14  2.5494E-12
 -6.1866E-14  1.5282E-13  2.3539E-13 -1.9280E-13 -2.2226E-14  9.9535E-13
  1.8267E-13 -4.4783E-13 -1.9280E-13  5.1952E-13  6.9179E-14 -2.9167E-12
  6.0068E-13 -6.9147E-14 -2.2226E-14  6.9179E-14  1.7035E-12 -3.9067E-13
 -1.0388E-12  2.5494E-12  9.9535E-13 -2.9167E-12 -3.9067E-13  1.6604E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.583500  171.707180    0.232340    0.026535   -0.957841  2453062.843043
# Heliocentric elements and errors
Epoch:              2453060.5000  =  2004/02/25
Mean Anomaly:          257.53261 +/-     0.099
Argument of Peri:      293.96367 +/-     0.071
Long of Asc Node:      352.83197 +/-     0.000
Inclination:            47.56678 +/-     0.000
Eccentricity:         0.12693417 +/-    0.0002
Semi-Major Axis:     43.99843791 +/-    0.0099
Time of Perihelion: 2483402.0315 +/-      27.5
Perihelion:          38.41353280 +/-    0.0129
Aphelion:            49.58334302 +/-    0.0147
Period (y)              291.8530 +/-      0.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -45.31611894 +/-    0.0026
Ecliptic Y            6.84144244 +/-    0.0004
Ecliptic Z            1.23983394 +/-    0.0001
Ecliptic XDOT        -0.00000278 +/-    0.0000
Ecliptic YDOT        -0.00168478 +/-    0.0000
Ecliptic ZDOT        -0.00182889 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.84640835 +/-    0.0026
Geocenter to KBO     44.88399444 +/-    0.0026
# Hcoef:  7.13

The following table shows the complete astrometric record for 04DG77. 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 (04DG77) followed by the observatory code and reference code for the source of the astrometry.

2004 02  27.34230  11 32 02.28   +04 44 38.4         04DG77    695  Ck9975      
2004 02  27.43654  11 32 01.84   +04 44 40.1         04DG77    695  Ck9975      
2004 03  15.22329  11 30 44.65   +04 50 27.5   23.1R 04DG77    695  Ck9975      
2004 03  15.31655  11 30 44.19   +04 50 29.1         04DG77    695  Ck9976      
2004 04  22.35564  11 28 04.57   +05 01 15.9   23.7R 04DG77    568  Ck9976      
2004 04  22.41931  11 28 04.37   +05 01 16.6         04DG77    568  Ck9976      
2005 03  11.31189  11 32 35.37   +03 43 34.7   23.3R 04DG77    695  Cn0227      
2005 03  12.26766  11 32 30.89   +03 43 54.7         04DG77    695  Cn0227      
2005 03  12.35146  11 32 30.50   +03 43 56.2         04DG77    695  Cn0227      
2015 03  16.26634  11 47 45.27   -07 27 19.4   23.2R 04DG77    G37  C~1N5r      
2015 03  16.33386  11 47 44.94   -07 27 17.6         04DG77    G37  C~1N5r      

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     0.19       0.00     0.10
  2   0.0003     -6.71     0.13      -1.04    -0.16
  3   0.0462  -1203.96    -0.10    -137.32     0.28
  4   0.0465  -1210.91    -0.27    -138.56    -0.14
  5   0.1506  -3658.58    -0.08    -484.21    -0.05
  6   0.1508  -3661.60     0.24    -484.74     0.06
  7   1.0348   1902.29     0.33   -3170.48     0.10
  8   1.0374   1832.78    -0.30   -3178.60    -0.01
  9   1.0377   1826.82    -0.13   -3179.52    -0.20
 10  11.0470  30842.74     0.11  -35351.49    -0.20
 11  11.0472  30837.33    -0.10  -35351.71     0.21

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.

04DG77    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.691    43.720    43.662
ecceobj         0.129     0.128     0.129
incobj         47.804    47.804    47.804
qmin           37.355    37.470    36.975
qmax           50.667    50.565    50.974
amean          43.844    43.877    43.809
amin           43.495    43.532    43.457
amax           44.230    44.251    44.193
emean           0.124     0.124     0.126
emin            0.109     0.111     0.106
emax            0.146     0.143     0.154
imean          48.370    48.367    48.357
imin           48.089    48.097    48.052
imax           48.619    48.621    48.646
excite_mean     0.758     0.758     0.758
fracstop        1.000     1.000     1.000
cjmean          2.276     2.277     2.276

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       154.5     152.1     161.2
kozaiamp        180.0     180.0     180.0