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: 01RW143 # Created Sun Dec 22 02:08:18 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 20 observations of 20 # Arc: 12.07y # First observation: 2001/09/12 # Last observation: 2013/10/06 # Chi-squared of fit: 45.68 DOF: 34 RMS: 0.27 # Min/Max residuals: -0.65 0.58 # Exact a, adot, b, bdot, g, gdot: 1.418419E-05 2.433934E-02 -1.934605E-07 -5.773928E-04 2.457690E-02 3.826163E-04 # Covariance matrix: 2.4744E-13 -5.0631E-14 -1.8658E-15 9.7089E-16 1.5062E-13 -1.2132E-13 -5.0631E-14 3.9632E-14 8.5816E-16 -8.9350E-16 3.5208E-15 1.3302E-13 -1.8658E-15 8.5816E-16 1.4257E-13 -1.6345E-14 -2.1471E-15 3.0981E-15 9.7089E-16 -8.9350E-16 -1.6345E-14 3.8202E-15 1.5887E-16 -3.3071E-15 1.5062E-13 3.5208E-15 -2.1471E-15 1.5887E-16 3.2944E-13 2.5970E-14 -1.2132E-13 1.3302E-13 3.0981E-15 -3.3071E-15 2.5970E-14 4.9428E-13 # lat0 lon0 xBary yBary zBary JD0 -2.679421 14.148951 0.422162 -0.042757 -0.910995 2452164.868083 # Heliocentric elements and errors Epoch: 2452164.5000 = 2001/09/12 Mean Anomaly: 3.97404 +/- 0.042 Argument of Peri: 237.82804 +/- 0.045 Long of Asc Node: 131.49561 +/- 0.003 Inclination: 2.96495 +/- 0.000 Eccentricity: 0.03688331 +/- 0.0001 Semi-Major Axis: 43.19452573 +/- 0.0043 Time of Perihelion: 2451019.8527 +/- 12.1 Perihelion: 41.60136873 +/- 0.0052 Aphelion: 44.78768272 +/- 0.0055 Period (y) 283.8908 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 40.40101475 +/- 0.0009 Ecliptic Y 9.75488365 +/- 0.0002 Ecliptic Z -1.90208786 +/- 0.0000 Ecliptic XDOT -0.00063308 +/- 0.0000 Ecliptic YDOT 0.00263985 +/- 0.0000 Ecliptic ZDOT -0.00006603 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.60549898 +/- 0.0009 Geocenter to KBO 40.68864346 +/- 0.0010 # Hcoef: 7.18
The following table shows the complete astrometric record for 01RW143. 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 (01RW143) followed by the observatory code and reference code for the source of the astrometry.
2001 09 12.36734 00 56 15.00 +03 06 32.8 22.8R 01RW143 695 Ce0436 2001 09 12.45401 00 56 14.65 +03 06 30.2 01RW143 695 Ce0436 2001 10 19.35775 00 53 32.60 +02 49 04.6 22.9R 01RW143 695 Ce0436 2001 10 19.40456 00 53 32.40 +02 49 03.4 01RW143 695 Ce0436 2001 10 20.35560 00 53 28.20 +02 48 37.6 01RW143 695 Ce0436 2001 12 16.06454 00 50 38.49 +02 33 11.9 22.6 01RW143 304 Ce9438 2001 12 16.10215 00 50 38.46 +02 33 11.4 01RW143 304 Ce9438 2002 08 12.33571 01 03 03.32 +03 48 34.2 22.0R 01RW143 807 Ci9379 2002 08 12.41326 01 03 03.18 +03 48 32.8 01RW143 807 Ci9379 2003 10 22.30897 01 03 47.10 +03 48 54.7 01RW143 304 Ci9379 2003 10 22.32339 01 03 47.02 +03 48 54.4 01RW143 304 Ci9379 2007 11 11.27723 01 23 12.52 +05 40 37.4 23.0R 01RW143 688 Cw6713 2007 11 11.33837 01 23 12.27 +05 40 35.7 01RW143 688 Cw6713 2008 09 20.77879 01 32 10.20 +06 32 22.6 26.0R 01RW143 250 S~06AQ 2008 09 20.78504 01 32 10.18 +06 32 22.6 01RW143 250 S~06AQ 2008 09 20.79199 01 32 10.15 +06 32 22.4 01RW143 250 S~06AQ 2008 09 20.79824 01 32 10.13 +06 32 22.4 01RW143 250 S~06AQ 2013 10 05.41838 01 57 31.64 +08 50 20.4 23.3R 01RW143 695 C~0zdD 2013 10 05.48206 01 57 31.36 +08 50 18.7 01RW143 695 C~0zdD 2013 10 06.42931 01 57 27.23 +08 49 54.6 01RW143 695 C~0zdD
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 0.30 0.00 0.08
2 0.0002 0.00 0.33 0.00 -0.16
3 0.1013 0.00 0.27 0.00 -0.21
4 0.1014 0.00 0.41 0.00 -0.14
5 0.1040 0.00 0.20 0.00 -0.25
6 0.2593 0.00 -0.32 0.00 0.08
7 0.2594 0.00 -0.20 0.00 -0.34
8 0.9144 0.00 -0.65 0.00 0.04
9 0.9146 0.00 -0.31 0.00 -0.08
10 2.1080 0.00 0.09 0.00 0.28
11 2.1080 0.00 -0.14 0.00 0.37
12 6.1627 0.00 0.00 0.00 -0.01
13 6.1628 0.00 0.01 0.00 -0.35
14 7.0237 0.00 -0.11 0.00 0.28
15 7.0237 0.00 -0.03 0.00 0.44
16 7.0237 0.00 -0.06 0.00 0.42
17 7.0238 0.00 0.01 0.00 0.58
18 12.0631 0.00 -0.01 0.00 -0.23
19 12.0633 0.00 0.01 0.00 -0.30
20 12.0659 0.00 0.18 0.00 -0.22
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.
01RW143 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.384 43.384 43.384 ecceobj 0.041 0.041 0.041 incobj 2.963 2.963 2.963 qmin 40.308 40.308 40.308 qmax 46.051 46.051 46.052 amean 43.074 43.074 43.074 amin 42.746 42.746 42.746 amax 43.423 43.423 43.423 emean 0.043 0.043 0.043 emin 0.022 0.022 0.022 emax 0.061 0.061 0.061 imean 2.549 2.549 2.549 imin 1.430 1.430 1.430 imax 3.445 3.445 3.445 excite_mean 0.063 0.063 0.063 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 180.2 180.3 180.2 kozaiamp 180.0 180.0 180.0