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: 99RW215
# Created Sun Dec 22 02:08:05 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 21 observations of 21
# Arc: 21.35y
# First observation: 1999/09/07
# Last observation: 2021/01/11
# Chi-squared of fit: 98.42 DOF: 36 RMS: 0.38
# Min/Max residuals: -0.98 0.87
# Exact a, adot, b, bdot, g, gdot:
1.648313E-05 3.444967E-02 -5.441487E-07 -3.466063E-03 3.077376E-02 -4.124732E-03
# Covariance matrix:
1.8178E-13 -2.5503E-14 -3.3052E-15 3.3647E-15 1.1827E-13 -3.1662E-14
-2.5503E-14 1.1140E-14 1.5005E-15 -1.3259E-15 -1.6105E-14 1.2891E-14
-3.3052E-15 1.5005E-15 1.0180E-13 -5.7494E-15 -3.2432E-15 1.9189E-15
3.3647E-15 -1.3259E-15 -5.7494E-15 8.2271E-16 3.7866E-15 -1.7709E-15
1.1827E-13 -1.6105E-14 -3.2432E-15 3.7866E-15 2.0644E-13 -3.4635E-14
-3.1662E-14 1.2891E-14 1.9189E-15 -1.7709E-15 -3.4635E-14 1.7039E-14
# lat0 lon0 xBary yBary zBary JD0
9.158941 16.345232 0.531756 0.134760 -0.837214 2451429.035503
# Heliocentric elements and errors
Epoch: 2451428.5000 = 1999/09/07
Mean Anomaly: 311.91342 +/- 0.002
Argument of Peri: 185.69967 +/- 0.003
Long of Asc Node: 253.03737 +/- 0.000
Inclination: 10.53297 +/- 0.000
Eccentricity: 0.16123180 +/- 0.0001
Semi-Major Axis: 36.67553156 +/- 0.0576
Time of Perihelion: 2462264.8849 +/- 165.7
Perihelion: 30.76226945 +/- 0.0484
Aphelion: 42.58879368 +/- 0.0670
Period (y) 222.1124 +/- 0.52
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 31.75522835 +/- 0.0006
Ecliptic Y 8.75912767 +/- 0.0002
Ecliptic Z 5.17237246 +/- 0.0001
Ecliptic XDOT -0.00116716 +/- 0.0000
Ecliptic YDOT 0.00286119 +/- 0.0000
Ecliptic ZDOT -0.00036278 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 33.34479675 +/- 0.0006
Geocenter to KBO 32.49531803 +/- 0.0007
# Hcoef: 7.95
The following table shows the complete astrometric record for 99RW215. 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 (99RW215) followed by the observatory code and reference code for the source of the astrometry.
1999 09 07.53476 00 45 44.02 +14 51 56.9 23.2R 99RW215 568 Ca9937 1999 09 07.58118 00 45 43.80 +14 51 55.0 22.8R 99RW215 568 Ca9937 1999 09 07.61487 00 45 43.64 +14 51 54.6 23.0R 99RW215 568 Ca9937 1999 09 11.56880 00 45 24.04 +14 50 20.3 22.9R 99RW215 568 Ca9937 1999 09 11.57924 00 45 23.98 +14 50 20.2 22.9R 99RW215 568 Ca9937 1999 09 13.50731 00 45 14.14 +14 49 30.8 22.7R 99RW215 568 Ca9937 1999 09 13.51439 00 45 14.10 +14 49 30.6 23.1R 99RW215 568 Ca9937 1999 10 08.52087 00 42 56.26 +14 35 59.0 22.6R 99RW215 568 Ca9937 1999 10 08.54696 00 42 56.09 +14 35 58.0 22.8R 99RW215 568 Ca9937 1999 11 09.40896 00 40 11.29 +14 14 49.4 22.9R 99RW215 568 Ca9937 1999 11 09.44946 00 40 11.13 +14 14 47.6 23.0R 99RW215 568 Ca9937 2000 12 27.26274 00 46 13.744 +14 26 12.74 22.7R 99RW215 568 Cl2529 2000 12 28.26969 00 46 14.269 +14 25 56.12 22.7R 99RW215 568 Cl2529 2003 11 22.12531 01 11 17.12 +16 26 56.5 22.4R 99RW215 695 Cl2529 2003 11 22.18533 01 11 16.87 +16 26 54.3 99RW215 695 Cl2529 2013 10 07.38637 02 44 19.41 +21 24 27.7 22.7R 99RW215 695 C~0zdB 2013 10 07.44887 02 44 19.07 +21 24 26.1 99RW215 695 C~0zdB 2013 10 07.50848 02 44 18.73 +21 24 25.0 99RW215 695 C~0zdB 2021 01 11.156980 03 43 06.412 +22 12 41.47 23.0G 99RW215 G37 C~4Tvb 2021 01 11.216200 03 43 06.200 +22 12 40.27 99RW215 G37 C~4Tvb 2021 01 11.258830 03 43 06.047 +22 12 39.73 99RW215 G37 C~4Tvb
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 0.34 0.00 -0.14
2 0.0001 0.00 0.48 0.00 -0.98
3 0.0002 0.00 0.58 0.00 -0.61
4 0.0110 0.00 0.21 0.00 -0.48
5 0.0111 0.00 0.12 0.00 -0.32
6 0.0164 0.00 0.01 0.00 -0.20
7 0.0164 0.00 -0.03 0.00 -0.22
8 0.0848 0.00 -0.32 0.00 0.46
9 0.0849 0.00 -0.62 0.00 0.44
10 0.1721 0.00 -0.50 0.00 -0.15
11 0.1723 0.00 -0.21 0.00 -0.34
12 1.3052 0.00 0.11 0.00 0.75
13 1.3080 0.00 0.06 0.00 0.87
14 4.2070 0.00 -0.17 0.00 0.41
15 4.2071 0.00 -0.11 0.00 0.47
16 14.0831 0.00 -0.04 0.00 0.28
17 14.0833 0.00 0.02 0.00 0.06
18 14.0834 0.00 -0.16 0.00 0.29
19 21.3460 0.00 0.05 0.00 -0.30
20 21.3462 0.00 0.03 0.00 -0.35
21 21.3463 0.00 -0.01 0.00 -0.07
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.
99RW215 quality flag:3 Type: 4:3E 4:3E 4:3E axisobj 36.666 36.666 36.666 ecceobj 0.162 0.162 0.162 incobj 10.531 10.531 10.531 qmin 30.089 30.120 30.091 qmax 43.188 43.213 43.177 amean 36.477 36.477 36.477 amin 36.125 36.075 36.109 amax 36.889 36.925 36.885 emean 0.145 0.147 0.145 emin 0.114 0.117 0.113 emax 0.173 0.173 0.173 imean 12.871 12.299 12.744 imin 11.448 10.481 11.326 imax 14.345 14.275 14.344 excite_mean 0.266 0.259 0.264 fracstop 1.000 1.000 1.000 cjmean 2.948 2.952 2.949 libcent 0 180.2 178.6 180.1 libamp 0 79.3 94.8 79.5 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 179.3 180.2 177.7 kozaiamp 179.9 180.0 180.0