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 Wed Dec 25 02:08:31 2024
# 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:
8.117281E-06 1.351295E-02 -1.052489E-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: 44.00726923 +/- 0.0091
Time of Perihelion: 2483411.1126 +/- 36.6
Perihelion: 38.43880985 +/- 0.0083
Aphelion: 49.57572862 +/- 0.0106
Period (y) 291.9408 +/- 0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -45.31757231 +/- 0.0025
Ecliptic Y 6.84167951 +/- 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 45.84795880 +/- 0.0025
Geocenter to KBO 44.88557746 +/- 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 37.390 37.395 37.410 qmax 50.592 50.619 50.612 amean 43.854 43.854 43.854 amin 43.504 43.507 43.501 amax 44.223 44.236 44.226 emean 0.123 0.123 0.123 emin 0.110 0.109 0.110 emax 0.144 0.144 0.144 imean 48.369 48.369 48.369 imin 48.103 48.106 48.091 imax 48.621 48.616 48.620 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 153.4 153.3 153.3 kozaiamp 179.9 180.0 180.0