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: 99DA
# Created Thu May 24 01:36:59 2012
# Orbit generated from Bernstein formalism
# Fitting 35 observations of 35
# Arc: 2.02y
# First observation: 1999/02/16
# Last observation: 2001/02/24
Preliminary a, adot, b, bdot, g, gdot:
0.000009 0.019652 0.000001 0.000069 0.021996 0.000000
# Chi-squared of fit: 136.44 DOF: 64 RMS: 0.35
# Min/Max residuals: -0.93 0.75
# Exact a, adot, b, bdot, g, gdot:
1.543651E-05 1.967752E-02 -3.288396E-07 6.907314E-05 2.207518E-02 -5.111911E-04
# Covariance matrix:
1.1257E-13 1.9628E-14 1.4449E-15 1.2023E-16 1.8346E-13 1.7137E-12
1.9628E-14 7.5284E-13 4.3434E-15 9.2263E-16 6.9886E-13 2.0083E-11
1.4449E-15 4.3434E-15 7.3505E-14 -4.7163E-14 8.0510E-15 1.2002E-13
1.2023E-16 9.2263E-16 -4.7163E-14 7.1356E-14 1.0513E-15 2.6956E-14
1.8346E-13 6.9886E-13 8.0510E-15 1.0513E-15 1.1224E-12 1.9696E-11
1.7137E-12 2.0083E-11 1.2002E-13 2.6956E-14 1.9696E-11 5.9382E-10
# lat0 lon0 xBary yBary zBary JD0
2.844376 139.848876 -0.132000 0.048709 -0.984852 2451225.833693
# Heliocentric elements and errors
Epoch: 2451220.5000 = 1999/02/11
Mean Anomaly: 196.80935 +/- 0.857
Argument of Peri: 251.67596 +/- 0.855
Long of Asc Node: 53.79472 +/- 0.016
Inclination: 2.79024 +/- 0.000
Eccentricity: 0.07519656 +/- 0.0003
Semi-Major Axis: 43.15403438 +/- 0.0066
Time of Perihelion: 2498158.3618 +/- 246.2
Perihelion: 39.90899937 +/- 0.0133
Aphelion: 46.39906940 +/- 0.0138
Period (y) 283.4917 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -35.41301271 +/- 0.0017
Ecliptic Y 29.70806535 +/- 0.0014
Ecliptic Z 2.24791046 +/- 0.0001
Ecliptic XDOT -0.00152667 +/- 0.0000
Ecliptic YDOT -0.00189748 +/- 0.0000
Ecliptic ZDOT 0.00000541 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 46.27854490 +/- 0.0016
Geocenter to KBO 45.29974486 +/- 0.0022
# Hcoef: 7.85
The following table shows the complete astrometric record for 99DA. 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 (99DA) followed by the observatory code and reference code for the source of the astrometry.
1999 02 16.33295 09 32 47.65 +17 33 35.4 24.3R 99DA 568 Ca4507 1999 02 16.37498 09 32 47.48 +17 33 36.0 24.1R 99DA 568 Ca4013 1999 02 16.38828 09 32 47.40 +17 33 36.6 99DA 568 Ca4507 1999 02 16.41302 09 32 47.31 +17 33 36.8 24.2R 99DA 568 Ca4013 1999 02 16.42551 09 32 47.23 +17 33 37.1 99DA 568 Ca4013 1999 02 16.42622 09 32 47.22 +17 33 37.4 99DA 568 Ca4507 1999 02 16.45233 09 32 47.12 +17 33 37.7 24.1R 99DA 568 Ca4013 1999 02 16.45887 09 32 47.08 +17 33 38.1 99DA 568 Ca4507 1999 02 16.48792 09 32 46.95 +17 33 38.5 24.1R 99DA 568 Ca4013 1999 02 17.31904 09 32 43.26 +17 33 56.3 99DA 568 Ca4013 1999 02 17.35801 09 32 43.05 +17 33 56.8 99DA 568 Ca4013 1999 02 17.39170 09 32 42.94 +17 33 57.5 99DA 568 Ca4013 1999 02 17.40529 09 32 42.86 +17 33 58.2 99DA 568 Ca4013 1999 03 23.25284 09 30 28.43 +17 43 45.4 24.0R 99DA 568 Ca4209 1999 03 23.25958 09 30 28.39 +17 43 45.6 99DA 568 Ca4209 1999 03 23.27248 09 30 28.35 +17 43 45.7 99DA 568 Ca4209 1999 03 23.33771 09 30 28.16 +17 43 46.6 99DA 568 Ca4209 1999 03 23.35067 09 30 28.11 +17 43 46.7 99DA 568 Ca4209 1999 05 09.98889 09 29 21.33 +17 46 19.4 24.4R 99DA 807 Ca6741 1999 05 10.99861 09 29 21.87 +17 46 12.8 24.5R 99DA 807 Ca6741 2000 03 30.26309 09 34 32.69 +17 24 02.9 99DA 568 Cc6423 2000 03 30.27631 09 34 32.66 +17 24 03.1 99DA 568 Cc6423 2000 03 30.28290 09 34 32.67 +17 24 03.3 99DA 568 Cc6423 2000 03 30.29589 09 34 32.64 +17 24 03.3 99DA 568 Cc6423 2000 03 30.31016 09 34 32.59 +17 24 03.4 99DA 568 Cc6423 2000 03 30.31661 09 34 32.55 +17 24 03.8 99DA 568 Cc6423 2000 03 30.32306 09 34 32.54 +17 24 03.7 99DA 568 Cc6423 2000 03 30.32958 09 34 32.52 +17 24 03.7 24.3R 99DA 568 Cc6423 2000 03 30.33607 09 34 32.50 +17 24 03.7 24.1R 99DA 568 Cc6423 2001 02 23.16458 09 41 11.76 +16 52 45.5 24.1R 99DA 309 Cc6423 2001 02 23.17162 09 41 11.72 +16 52 45.9 23.9R 99DA 309 Cc6423 2001 02 24.13751 09 41 07.49 +16 53 06.0 99DA 309 Cc6423 2001 02 24.16626 09 41 07.37 +16 53 07.0 24. R 99DA 309 Cc7487 2001 02 24.19459 09 41 07.26 +16 53 07.5 99DA 309 Cc7487 2001 02 24.21656 09 41 07.14 +16 53 07.6 99DA 309 Cc6423
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 0.08 2 0.0001 -2.50 0.12 -0.21 -0.10 3 0.0002 -3.77 -0.25 0.00 0.11 4 0.0002 -5.05 0.17 -0.22 -0.09 5 0.0003 -6.23 -0.15 -0.30 -0.16 6 0.0003 -6.47 -0.33 -0.07 0.08 7 0.0003 -7.92 0.01 -0.24 -0.07 8 0.0003 -8.59 -0.21 -0.04 0.13 9 0.0004 -10.48 -0.10 -0.25 -0.06 10 0.0027 -66.17 0.20 -0.21 0.32 11 0.0028 -69.17 -0.14 -0.69 -0.14 12 0.0029 -70.89 0.45 -0.53 0.05 13 0.0029 -72.20 0.08 -0.23 0.36 14 0.0956 -2080.83 0.33 -53.29 0.13 15 0.0956 -2081.44 0.05 -53.28 0.15 16 0.0957 -2082.01 0.09 -53.37 0.10 17 0.0958 -2084.87 0.37 -53.37 0.28 18 0.0959 -2085.58 0.29 -53.50 0.19 19 0.2263 -3039.23 0.08 -209.39 0.71 20 0.2291 -3029.83 -0.93 -213.23 0.57 21 1.1169 1607.05 -0.21 -61.51 -0.80 22 1.1169 1606.58 -0.14 -61.46 -0.71 23 1.1169 1606.65 0.21 -61.22 -0.46 24 1.1169 1606.24 0.34 -61.36 -0.55 25 1.1170 1605.53 0.23 -61.50 -0.64 26 1.1170 1604.86 -0.18 -61.30 -0.42 27 1.1170 1604.76 -0.01 -61.44 -0.54 28 1.1170 1604.49 -0.01 -61.53 -0.62 29 1.1171 1604.21 -0.01 -61.62 -0.69 30 2.0201 7630.26 0.12 23.01 0.23 31 2.0201 7629.59 -0.08 23.20 0.43 32 2.0227 7565.55 -0.09 22.19 0.34 33 2.0228 7563.59 -0.11 22.57 0.75 34 2.0229 7561.93 0.13 22.52 0.74 35 2.0230 7560.27 -0.05 22.05 0.30
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.
99DA quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.263 43.283 43.243 ecceobj 0.072 0.073 0.072 incobj 2.790 2.790 2.790 qmin 39.960 39.970 39.943 qmax 46.791 46.821 46.767 amean 43.354 43.377 43.336 amin 43.338 43.359 43.318 amax 43.377 43.397 43.356 emean 0.067 0.067 0.066 emin 0.052 0.052 0.052 emax 0.079 0.079 0.079 imean 1.297 1.306 1.289 imin 0.156 0.180 0.130 imax 2.276 2.276 2.276 excite_mean 0.071 0.071 0.071 fracstop 1.000 1.000 1.000 cjmean 3.088 3.088 3.088 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 209.6 212.7 206.0 kozaiamp 180.0 180.0 179.9