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: 09DS143 # Created Sun Apr 27 01:09:07 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 29 observations of 29 # Arc: 6.00y # First observation: 2009/02/18 # Last observation: 2015/02/18 # Chi-squared of fit: 16.38 DOF: 52 RMS: 0.13 # Min/Max residuals: -0.68 0.25 # Exact a, adot, b, bdot, g, gdot: 1.810427E-05 3.133530E-02 3.774660E-08 4.671506E-04 2.736697E-02 1.362003E-03 # Covariance matrix: 1.4500E-13 4.4108E-14 8.6481E-16 1.0684E-15 1.3504E-13 3.6354E-13 4.4108E-14 3.0393E-13 3.5751E-16 4.5025E-15 1.6060E-13 1.7387E-12 8.6481E-16 3.5751E-16 6.3908E-14 -1.2943E-14 1.3745E-15 2.3943E-15 1.0684E-15 4.5025E-15 -1.2943E-14 1.2808E-14 2.7589E-15 2.6945E-14 1.3504E-13 1.6060E-13 1.3745E-15 2.7589E-15 2.4200E-13 9.9277E-13 3.6354E-13 1.7387E-12 2.3943E-15 2.6945E-14 9.9277E-13 1.0389E-11 # lat0 lon0 xBary yBary zBary JD0 11.200440 -176.158949 0.555467 0.159824 -0.807108 2454881.122568 # Heliocentric elements and errors Epoch: 2454880.5000 = 2009/02/18 Mean Anomaly: 4.70315 +/- 0.017 Argument of Peri: 76.67839 +/- 0.030 Long of Asc Node: 98.46857 +/- 0.001 Inclination: 11.00390 +/- 0.000 Eccentricity: 0.24195287 +/- 0.0001 Semi-Major Axis: 49.17926510 +/- 0.0042 Time of Perihelion: 2453234.7734 +/- 6.1 Perihelion: 37.28020091 +/- 0.0042 Aphelion: 61.07832929 +/- 0.0059 Period (y) 344.8905 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.61963723 +/- 0.0006 Ecliptic Y -1.90709581 +/- 0.0000 Ecliptic Z 7.09769633 +/- 0.0001 Ecliptic XDOT 0.00009103 +/- 0.0000 Ecliptic YDOT -0.00313288 +/- 0.0000 Ecliptic ZDOT 0.00007221 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.34984353 +/- 0.0006 Geocenter to KBO 36.54040410 +/- 0.0007 # Hcoef: 8.39
The following table shows the complete astrometric record for 09DS143. 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 (09DS143) followed by the observatory code and reference code for the source of the astrometry.
2009 02 18.621802 12 32 00.014 +08 44 49.77 09DS143 568 C~0aRR 2009 02 19.478979 12 31 56.917 +08 45 20.32 23.7i 09DS143 568 C~0aRR 2009 02 19.539669 12 31 56.683 +08 45 22.42 23.5i 09DS143 568 C~0aRR 2009 02 19.626511 12 31 56.359 +08 45 25.47 24.3i 09DS143 568 C~0aRR 2009 02 22.523989 12 31 45.446 +08 47 09.45 24.8g 09DS143 568 C~0aRR 2009 02 22.582110 12 31 45.219 +08 47 11.58 24.6g 09DS143 568 C~0aRR 2009 02 23.437549 12 31 41.905 +08 47 42.44 23.8i 09DS143 568 C~0aRR 2009 02 23.474129 12 31 41.753 +08 47 43.67 24.4g 09DS143 568 C~0aRR 2009 02 23.530270 12 31 41.532 +08 47 45.71 24.4g 09DS143 568 C~0aRR 2009 02 23.585800 12 31 41.308 +08 47 47.77 24.5g 09DS143 568 C~0aRR 2009 03 23.486653 12 29 34.477 +09 04 14.62 09DS143 568 C~0aRR 2009 03 23.543331 12 29 34.191 +09 04 16.52 09DS143 568 C~0aRR 2009 04 19.385560 12 27 24.520 +09 16 32.34 09DS143 568 C~0aRR 2009 04 23.316967 12 27 07.120 +09 17 49.48 09DS143 568 C~0aRR 2009 04 27.259808 12 26 50.385 +09 18 57.54 09DS143 568 C~0aRR 2009 04 29.384481 12 26 41.699 +09 19 30.01 09DS143 568 C~0aRR 2009 05 01.278316 12 26 34.171 +09 19 56.75 09DS143 568 C~0aRR 2009 05 01.345028 12 26 33.907 +09 19 57.68 09DS143 568 C~0aRR 2009 05 01.388163 12 26 33.748 +09 19 58.07 09DS143 568 C~0aRR 2009 05 01.427412 12 26 33.583 +09 19 58.52 09DS143 568 C~0aRR 2009 05 01.465679 12 26 33.430 +09 19 59.06 09DS143 568 C~0aRR 2009 05 29.254376 12 25 12.117 +09 21 44.97 09DS143 568 C~0aRR 2009 06 18.266712 12 24 54.453 +09 17 28.87 09DS143 568 C~0aRR 2009 06 19.258597 12 24 54.581 +09 17 09.24 09DS143 568 C~0aRR 2013 05 14.18625 12 52 16.35 +06 34 38.6 24.1R 09DS143 G37 C~1T0w 2013 05 14.25730 12 52 16.12 +06 34 39.9 09DS143 G37 C~1T0w 2015 02 18.33678 13 11 26.78 +04 29 51.2 23.9R 09DS143 695 C~1T0w 2015 02 18.43039 13 11 26.50 +04 29 54.2 09DS143 695 C~1T0w 2015 02 18.51933 13 11 26.26 +04 29 57.1 09DS143 695 C~1T0w
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 0.02 0.00 0.04
2 0.0023 0.00 0.08 0.00 0.07
3 0.0025 0.00 -0.01 0.00 0.00
4 0.0028 0.00 0.03 0.00 -0.04
5 0.0107 0.00 -0.07 0.00 0.00
6 0.0108 0.00 -0.02 0.00 0.04
7 0.0132 0.00 -0.00 0.00 0.05
8 0.0133 0.00 -0.08 0.00 -0.04
9 0.0134 0.00 -0.02 0.00 -0.03
10 0.0136 0.00 -0.03 0.00 0.02
11 0.0900 0.00 0.09 0.00 0.02
12 0.0901 0.00 0.06 0.00 0.06
13 0.1636 0.00 -0.00 0.00 -0.08
14 0.1744 0.00 0.03 0.00 -0.09
15 0.1852 0.00 -0.01 0.00 0.03
16 0.1910 0.00 0.12 0.00 -0.06
17 0.1962 0.00 -0.07 0.00 0.12
18 0.1964 0.00 -0.02 0.00 0.16
19 0.1965 0.00 0.19 0.00 -0.03
20 0.1966 0.00 0.07 0.00 -0.09
21 0.1967 0.00 0.06 0.00 -0.06
22 0.2728 0.00 0.09 0.00 -0.07
23 0.3276 0.00 -0.26 0.00 0.06
24 0.3303 0.00 -0.09 0.00 0.07
25 4.2315 0.00 -0.34 0.00 -0.68
26 4.2317 0.00 0.07 0.00 0.00
27 5.9979 0.00 0.18 0.00 0.09
28 5.9981 0.00 -0.08 0.00 0.15
29 5.9984 0.00 0.09 0.00 0.25
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.
09DS143 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 49.009 49.009 49.009 ecceobj 0.239 0.239 0.239 incobj 10.999 10.999 10.999 qmin 36.695 36.668 36.693 qmax 62.484 62.445 62.517 amean 49.301 49.302 49.300 amin 48.833 48.823 48.842 amax 49.850 49.848 49.838 emean 0.240 0.240 0.240 emin 0.228 0.228 0.228 emax 0.254 0.254 0.255 imean 9.623 9.622 9.623 imin 9.102 9.103 9.102 imax 10.282 10.289 10.287 excite_mean 0.293 0.293 0.293 fracstop 1.000 1.000 1.000 cjmean 3.060 3.060 3.060 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 177.1 177.0 177.0 kozaiamp 180.0 180.0 180.0