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 Sun Dec  5 02:09:51 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     14 observations of     14
# Arc:  16.97y
# First observation: 2004/02/27
#  Last observation: 2021/02/15
# Chi-squared of fit:    19.60 DOF:     22 RMS:  0.21
# Min/Max residuals:    -0.35    0.32
# Exact a, adot, b, bdot, g, gdot:
  8.117484E-06  1.351295E-02 -1.052480E-05 -1.482510E-02  2.227893E-02 -2.379988E-03
# Covariance matrix:
  3.6601E-13 -2.4701E-14  2.0403E-15 -1.8856E-15  5.4329E-13  5.7357E-15
 -2.4701E-14  2.1196E-14  1.3450E-14 -2.0898E-14 -2.3312E-16  7.9155E-14
  2.0403E-15  1.3450E-14  1.7754E-13 -2.6872E-14  3.2327E-14  5.8679E-14
 -1.8856E-15 -2.0898E-14 -2.6872E-14  2.5858E-14 -4.6543E-14 -9.0764E-14
  5.4329E-13 -2.3312E-16  3.2327E-14 -4.6543E-14  1.5584E-12  1.7226E-13
  5.7357E-15  7.9155E-14  5.8679E-14 -9.0764E-14  1.7226E-13  3.4334E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.583500  171.707180    0.232339    0.026534   -0.957842  2453062.843043
# Heliocentric elements and errors
Epoch:              2453062.5000  =  2004/02/27
Mean Anomaly:          257.53954 +/-     0.094
Argument of Peri:      293.92287 +/-     0.068
Long of Asc Node:      352.83196 +/-     0.000
Inclination:            47.56697 +/-     0.000
Eccentricity:         0.12653499 +/-    0.0001
Semi-Major Axis:     44.00726920 +/-    0.0091
Time of Perihelion: 2483411.1127 +/-      36.6
Perihelion:          38.43880983 +/-    0.0083
Aphelion:            49.57572857 +/-    0.0106
Period (y)              291.9408 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -45.31757230 +/-    0.0025
Ecliptic Y            6.84167950 +/-    0.0004
Ecliptic Z            1.23989599 +/-    0.0001
Ecliptic XDOT        -0.00000369 +/-    0.0000
Ecliptic YDOT        -0.00168484 +/-    0.0000
Ecliptic ZDOT        -0.00182909 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.84795879 +/-    0.0025
Geocenter to KBO     44.88557745 +/-    0.0025
# Hcoef:  7.31

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      
2021 02  15.375430 12 00 00.920  -14 33 17.40  24.3G 04DG77    G37  C~4YrO      
2021 02  15.418700 12 00 00.763  -14 33 17.73        04DG77    G37  C~4YrO      
2021 02  15.481020 12 00 00.513  -14 33 17.25        04DG77    G37  C~4YrO      

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     0.28       0.00    -0.12
     2   0.0003      0.00     0.12       0.00    -0.33
     3   0.0462      0.00     0.04       0.00     0.20
     4   0.0465      0.00    -0.28       0.00    -0.12
     5   0.1506      0.00    -0.17       0.00    -0.04
     6   0.1508      0.00     0.17       0.00    -0.07
     7   1.0348      0.00     0.28       0.00     0.17
     8   1.0374      0.00    -0.35       0.00     0.32
     9   1.0377      0.00    -0.27       0.00     0.08
    10  11.0470      0.00     0.14       0.00    -0.24
    11  11.0472      0.00     0.10       0.00     0.20
    12  16.9693      0.00    -0.31       0.00     0.22
    13  16.9694      0.00     0.03       0.00    -0.25
    14  16.9696      0.00     0.16       0.00     0.02

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        43.699    43.699    43.699
ecceobj         0.128     0.128     0.128
incobj         47.805    47.805    47.805
qmin           37.404    37.396    37.414
qmax           50.579    50.618    50.619
amean          43.854    43.854    43.854
amin           43.503    43.506    43.500
amax           44.218    44.233    44.230
emean           0.123     0.123     0.123
emin            0.109     0.109     0.110
emax            0.144     0.144     0.144
imean          48.369    48.369    48.369
imin           48.098    48.103    48.092
imax           48.622    48.617    48.622
excite_mean     0.758     0.758     0.758
fracstop        1.000     1.000     1.000
cjmean          2.276     2.276     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       153.3     153.4     153.5
kozaiamp        179.9     180.0     180.0