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: 09DR143
# Created Wed Dec 25 02:08:58 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 28 observations of 28
# Arc: 12.23y
# First observation: 2009/02/18
# Last observation: 2021/05/12
# Chi-squared of fit: 9.06 DOF: 50 RMS: 0.10
# Min/Max residuals: -0.25 0.25
# Exact a, adot, b, bdot, g, gdot:
1.448413E-05 1.960654E-02 -1.476625E-08 -6.470780E-04 2.165087E-02 -2.930926E-03
# Covariance matrix:
1.7790E-13 -3.4169E-14 -1.6677E-15 1.5525E-15 1.4104E-13 -1.5093E-13
-3.4169E-14 4.3223E-14 8.1171E-16 -1.5978E-15 -1.1333E-14 1.9592E-13
-1.6677E-15 8.1171E-16 7.0317E-14 -7.6624E-15 -1.9063E-15 4.2284E-15
1.5525E-15 -1.5978E-15 -7.6624E-15 3.1155E-15 1.1873E-15 -7.9107E-15
1.4104E-13 -1.1333E-14 -1.9063E-15 1.1873E-15 2.0120E-13 -8.7111E-14
-1.5093E-13 1.9592E-13 4.2284E-15 -7.9107E-15 -8.7111E-14 9.6062E-13
# lat0 lon0 xBary yBary zBary JD0
9.543239 -175.581155 0.563893 0.135464 -0.805722 2454881.111737
# Heliocentric elements and errors
Epoch: 2454880.5000 = 2009/02/18
Mean Anomaly: 278.37979 +/- 0.034
Argument of Peri: 200.88785 +/- 0.022
Long of Asc Node: 82.87406 +/- 0.001
Inclination: 9.54556 +/- 0.000
Eccentricity: 0.16174714 +/- 0.0000
Semi-Major Axis: 46.87768173 +/- 0.0038
Time of Perihelion: 2481459.7573 +/- 15.7
Perihelion: 39.29535073 +/- 0.0040
Aphelion: 54.46001273 +/- 0.0050
Period (y) 320.9648 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -46.26853949 +/- 0.0009
Ecliptic Y -3.01512359 +/- 0.0001
Ecliptic Z 7.65753213 +/- 0.0002
Ecliptic XDOT 0.00054725 +/- 0.0000
Ecliptic YDOT -0.00244157 +/- 0.0000
Ecliptic ZDOT -0.00014225 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 46.99485768 +/- 0.0009
Geocenter to KBO 46.18765309 +/- 0.0010
# Hcoef: 7.43
The following table shows the complete astrometric record for 09DR143. 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 (09DR143) followed by the observatory code and reference code for the source of the astrometry.
2009 02 18.610971 12 31 25.362 +07 00 03.81 09DR143 568 C~0aRR 2009 02 22.498993 12 31 13.164 +07 01 51.76 09DR143 568 C~0aRR 2009 02 22.566350 12 31 12.934 +07 01 53.44 09DR143 568 C~0aRR 2009 02 22.622633 12 31 12.746 +07 01 54.99 09DR143 568 C~0aRR 2009 02 23.570079 12 31 09.654 +07 02 21.64 09DR143 568 C~0aRR 2009 02 23.625785 12 31 09.460 +07 02 23.02 09DR143 568 C~0aRR 2009 03 23.454594 12 29 24.304 +07 15 22.29 24.2g 09DR143 568 C~0aRR 2009 03 23.510121 12 29 24.073 +07 15 23.65 24.6g 09DR143 568 C~0aRR 2009 03 23.567054 12 29 23.853 +07 15 25.36 25.5g 09DR143 568 C~0aRR 2009 04 19.321582 12 27 36.755 +07 25 37.05 24.3g 09DR143 568 C~0aRR 2009 04 19.377144 12 27 36.537 +07 25 38.13 24.8g 09DR143 568 C~0aRR 2009 04 19.448132 12 27 36.266 +07 25 39.53 24.7g 09DR143 568 C~0aRR 2009 04 23.284996 12 27 22.123 +07 26 45.88 24.4g 09DR143 568 C~0aRR 2009 04 23.340698 12 27 21.919 +07 26 46.76 24.6g 09DR143 568 C~0aRR 2009 04 26.261626 12 27 11.505 +07 27 33.11 09DR143 568 C~0aRR 2009 04 27.283412 12 27 07.946 +07 27 48.21 09DR143 568 C~0aRR 2009 05 01.360988 12 26 54.156 +07 28 43.98 09DR143 568 C~0aRR 2009 05 01.404204 12 26 54.012 +07 28 44.58 09DR143 568 C~0aRR 2009 05 01.443475 12 26 53.882 +07 28 45.04 09DR143 568 C~0aRR 2009 05 17.409957 12 26 08.037 +07 31 03.52 09DR143 568 C~0aRR 2013 05 14.18219 12 42 40.93 +05 33 54.5 23.4R 09DR143 G37 C~1T0w 2013 05 14.25103 12 42 40.71 +05 33 54.7 09DR143 G37 C~1T0w 2015 02 18.33037 12 56 17.91 +04 00 43.7 23.6R 09DR143 695 C~1T0w 2015 02 18.42395 12 56 17.66 +04 00 46.1 09DR143 695 C~1T0w 2015 02 18.51303 12 56 17.42 +04 00 48.5 09DR143 695 C~1T0w 2021 05 12.200150 13 16 48.245 +01 24 41.93 23.6G 09DR143 G37 C~4pSg 2021 05 12.252000 13 16 48.062 +01 24 42.71 09DR143 G37 C~4pSg 2021 05 12.299230 13 16 47.888 +01 24 43.28 09DR143 G37 C~4pSg
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 -0.07 0.00 -0.07
2 0.0106 0.00 0.14 0.00 0.16
3 0.0108 0.00 0.05 0.00 -0.05
4 0.0110 0.00 0.03 0.00 -0.07
5 0.0136 0.00 0.08 0.00 0.05
6 0.0137 0.00 -0.02 0.00 -0.13
7 0.0899 0.00 -0.02 0.00 0.04
8 0.0901 0.00 -0.02 0.00 -0.08
9 0.0902 0.00 0.22 0.00 0.12
10 0.1635 0.00 0.00 0.00 -0.04
11 0.1636 0.00 -0.07 0.00 0.03
12 0.1638 0.00 -0.07 0.00 0.14
13 0.1743 0.00 -0.08 0.00 0.02
14 0.1745 0.00 -0.05 0.00 -0.03
15 0.1825 0.00 -0.11 0.00 0.14
16 0.1853 0.00 -0.00 0.00 0.01
17 0.1964 0.00 -0.08 0.00 -0.11
18 0.1966 0.00 -0.06 0.00 -0.06
19 0.1967 0.00 -0.03 0.00 -0.10
20 0.2404 0.00 0.09 0.00 -0.25
21 4.2315 0.00 0.24 0.00 0.25
22 4.2317 0.00 -0.00 0.00 -0.14
23 5.9979 0.00 -0.07 0.00 0.07
24 5.9981 0.00 -0.01 0.00 0.07
25 5.9984 0.00 0.03 0.00 0.20
26 12.2261 0.00 -0.03 0.00 -0.09
27 12.2263 0.00 0.02 0.00 -0.02
28 12.2264 0.00 -0.04 0.00 -0.09
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.
09DR143 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.666 46.665 46.666 ecceobj 0.159 0.159 0.159 incobj 9.550 9.550 9.550 qmin 38.827 38.833 38.822 qmax 55.498 55.509 55.503 amean 46.966 46.966 46.966 amin 46.564 46.563 46.559 amax 47.432 47.431 47.445 emean 0.156 0.156 0.156 emin 0.141 0.142 0.141 emax 0.171 0.171 0.171 imean 7.740 7.740 7.740 imin 7.318 7.316 7.316 imax 8.276 8.276 8.274 excite_mean 0.206 0.206 0.206 fracstop 1.000 1.000 1.000 cjmean 3.086 3.086 3.086 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 181.8 181.6 181.6 kozaiamp 180.0 180.0 180.0