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: 17OF201 # Created Mon Jul 7 01:11:32 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 25 observations of 25 # Arc: 14.11y # First observation: 2004/09/21 # Last observation: 2018/10/31 # Chi-squared of fit: 7.53 DOF: 44 RMS: 0.10 # Min/Max residuals: -0.22 0.28 # Exact a, adot, b, bdot, g, gdot: 1.137087E-05 9.746335E-03 9.048555E-07 1.387417E-03 1.305003E-02 8.290791E-03 # Covariance matrix: 4.6812E-13 -1.1023E-13 2.4963E-14 -1.1549E-14 -7.6596E-14 -6.4030E-13 -1.1023E-13 4.4200E-14 -1.2434E-14 5.8983E-15 6.3067E-14 3.1810E-13 2.4963E-14 -1.2434E-14 2.9253E-13 -2.9772E-14 -1.9988E-14 -9.7271E-14 -1.1549E-14 5.8983E-15 -2.9772E-14 4.3884E-15 1.0628E-14 4.6211E-14 -7.6596E-14 6.3067E-14 -1.9988E-14 1.0628E-14 2.9709E-13 5.0493E-13 -6.4030E-13 3.1810E-13 -9.7271E-14 4.6211E-14 5.0493E-13 2.4882E-12 # lat0 lon0 xBary yBary zBary JD0 14.137345 27.897658 0.495077 0.214557 -0.851558 2453269.752147 # Heliocentric elements and errors Epoch: 2453270.5000 = 2004/09/22 Mean Anomaly: 1.25303 +/- 0.005 Argument of Peri: 337.33065 +/- 0.007 Long of Asc Node: 328.76387 +/- 0.001 Inclination: 16.23342 +/- 0.000 Eccentricity: 0.94165920 +/- 0.0002 Semi-Major Axis: 768.56424947 +/- 2.1639 Time of Perihelion: 2426182.5438 +/- 161.8 Perihelion: 44.83865604 +/- 0.1797 Aphelion: 1492.28984290 +/- 4.2035 Period (y) 21307.3025 +/- 89.99 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 66.67483199 +/- 0.0027 Ecliptic Y 34.74306758 +/- 0.0015 Ecliptic Z 18.71629923 +/- 0.0008 Ecliptic XDOT 0.00046948 +/- 0.0000 Ecliptic YDOT 0.00255597 +/- 0.0000 Ecliptic ZDOT 0.00070720 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 77.47771291 +/- 0.0025 Geocenter to KBO 76.62741975 +/- 0.0032 # Hcoef: 3.36
The following table shows the complete astrometric record for 17OF201. 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 (17OF201) followed by the observatory code and reference code for the source of the astrometry.
2004 09 21.251404 01 21 41.70 +23 51 51.7 22.3r 17OF201 645 C~8vJ3 2004 09 21.252234 01 21 41.70 +23 51 51.5 21.6i 17OF201 645 C~8vJ3 2004 09 21.254722 01 21 41.68 +23 51 51.5 23.2g 17OF201 645 C~8vJ3 2009 09 26.450784 01 31 45.97 +25 12 47.4 21.7r 17OF201 645 C~8vJ3 2009 09 26.451613 01 31 45.97 +25 12 47.5 21.7r 17OF201 645 C~8vJ3 2009 09 26.454101 01 31 45.96 +25 12 47.3 22.7g 17OF201 645 C~8vJ3 2011 08 31.476299 01 36 40.144 +25 44 31.95 22.6r 17OF201 T14 C~8uae 2011 08 31.519310 01 36 40.074 +25 44 32.08 22.6r 17OF201 T14 C~8uae 2011 08 31.562477 01 36 39.996 +25 44 32.11 22.6r 17OF201 T14 C~8uae 2011 09 05.489622 01 36 31.220 +25 44 32.41 22.5r 17OF201 T14 C~8uae 2011 11 24.380755 01 33 14.889 +25 29 41.15 22.5r 17OF201 T14 C~8uae 2011 11 30.385904 01 33 02.846 +25 27 58.06 22.6r 17OF201 T14 C~8uae 2011 11 30.402316 01 33 02.814 +25 27 57.75 22.6r 17OF201 T14 C~8uae 2011 12 01.397649 01 33 00.946 +25 27 40.74 22.6r 17OF201 T14 C~8uae 2012 01 28.248319 01 32 30.863 +25 15 22.20 22.6r 17OF201 T14 C~8uae 2014 08 13.412699 01 42 46.672 +26 25 58.51 21.7z 17OF201 W84 C~8uae 2015 10 11.221651 01 42 46.775 +26 37 44.50 22.5r 17OF201 W84 C~8uae 2015 10 11.223392 01 42 46.783 +26 37 44.42 23.7g 17OF201 W84 C~8uae 2017 07 23.439114 01 48 22.616 +27 02 09.48 21.7z 17OF201 W84 C~8uae 2017 09 17.306714 01 47 24.008 +27 06 52.60 22.7r 17OF201 W84 C~8uae 2017 11 12.139200 01 45 04.120 +26 57 08.36 24.3g 17OF201 W84 C~8uae 2018 07 26.429138 01 50 10.026 +27 15 20.25 22.0z 17OF201 W84 C~8uae 2018 08 10.385365 01 50 06.204 +27 17 54.30 23.4g 17OF201 W84 C~8uae 2018 08 11.374840 01 50 05.580 +27 18 02.49 22.6r 17OF201 W84 C~8uae 2018 10 31.169804 01 47 24.018 +27 13 04.03 22.6r 17OF201 W84 C~8uae
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 0.18
2 0.0000 0.00 0.06 0.00 -0.01
3 0.0000 0.00 -0.15 0.00 0.01
4 5.0136 0.00 0.07 0.00 -0.09
5 5.0136 0.00 0.11 0.00 0.01
6 5.0136 0.00 0.05 0.00 -0.17
7 6.9411 0.00 -0.14 0.00 -0.09
8 6.9412 0.00 -0.07 0.00 -0.01
9 6.9413 0.00 -0.12 0.00 -0.01
10 6.9548 0.00 -0.04 0.00 -0.01
11 7.1735 0.00 0.01 0.00 -0.04
12 7.1900 0.00 -0.00 0.00 0.00
13 7.1900 0.00 -0.01 0.00 -0.02
14 7.1927 0.00 0.04 0.00 -0.02
15 7.3511 0.00 0.05 0.00 -0.05
16 9.8923 0.00 0.05 0.00 -0.02
17 11.0526 0.00 -0.04 0.00 0.24
18 11.0526 0.00 0.15 0.00 0.18
19 12.8356 0.00 0.28 0.00 0.05
20 12.9885 0.00 0.02 0.00 -0.03
21 13.1414 0.00 -0.03 0.00 0.03
22 13.8431 0.00 -0.06 0.00 -0.02
23 13.8840 0.00 -0.01 0.00 -0.16
24 13.8867 0.00 0.01 0.00 -0.06
25 14.1079 0.00 -0.22 0.00 0.10
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.
17OF201 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 945.164 945.308 945.020 ecceobj 0.952 0.952 0.952 incobj 16.192 16.192 16.192 qmin 37.046 36.747 37.452 qmax 2104.781 2161.487 2094.574 amean 812.601 869.113 823.113 amin 711.074 763.540 740.606 amax 1074.877 1103.261 1069.768 emean 0.944 0.948 0.945 emin 0.932 0.936 0.935 emax 0.958 0.959 0.958 imean 17.477 17.475 17.472 imin 16.051 15.974 16.060 imax 19.063 19.325 19.148 excite_mean 0.991 0.995 0.992 fracstop 1.000 1.000 1.000 cjmean 3.289 3.289 3.289 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 339.7 339.6 339.5 kozaiamp 3.9 3.7 3.8