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: 491767 # Created Fri Nov 22 02:07:11 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 57 observations of 57 # Arc: 8.97y # First observation: 2009/01/16 # Last observation: 2018/01/05 # Chi-squared of fit: 63.81 DOF: 108 RMS: 0.19 # Min/Max residuals: -0.48 0.43 # Exact a, adot, b, bdot, g, gdot: 1.520304E-05 2.725422E-02 8.497217E-06 1.169860E-02 2.745362E-02 -5.662273E-04 # Covariance matrix: 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 # lat0 lon0 xBary yBary zBary JD0 -19.097216 27.281345 -0.988457 -0.007011 -0.020351 2454847.672724 # Heliocentric elements and errors Epoch: 2454848.5000 = 2009/01/17 Mean Anomaly: 5.19317 +/- 0.000 Argument of Peri: 313.29665 +/- 0.000 Long of Asc Node: 65.46447 +/- 0.000 Inclination: 30.14860 +/- 0.000 Eccentricity: 0.07926860 +/- 0.0000 Semi-Major Axis: 39.58096576 +/- 0.0000 Time of Perihelion: 2453536.4267 +/- 0.0 Perihelion: 36.44343800 +/- 0.0000 Aphelion: 42.71849352 +/- 0.0000 Period (y) 249.0220 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 30.15980444 +/- 0.0000 Ecliptic Y 16.66138649 +/- 0.0000 Ecliptic Z -11.91697353 +/- 0.0000 Ecliptic XDOT -0.00094851 +/- 0.0000 Ecliptic YDOT 0.00256919 +/- 0.0000 Ecliptic ZDOT 0.00112082 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.45859993 +/- 0.0000 Geocenter to KBO 36.42511172 +/- 0.0000 # Hcoef: 7.67
The following table shows the complete astrometric record for 491767. 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 (491767) followed by the observatory code and reference code for the source of the astrometry.
2009 01 16.171958 02 08 32.17 -07 20 50.3 491767 645 C~1QeJ 2009 01 16.172787 02 08 32.17 -07 20 50.3 491767 645 C~1QeJ 2009 01 16.175275 02 08 32.17 -07 20 50.2 491767 645 C~1QeJ 2012 11 15.091134 02 31 40.89 -02 47 13.3 491767 W84 C~1Cs0 2012 11 15.092535 02 31 40.89 -02 47 13.3 491767 W84 C~1Cs0 2012 11 15.095370 02 31 40.87 -02 47 13.4 491767 W84 C~1Cs0 2012 11 15.101192 02 31 40.84 -02 47 13.4 491767 W84 C~1Cs0 2012 12 04.202569 02 30 04.75 -02 48 24.7 491767 W84 C~1Cs0 2012 12 04.203935 02 30 04.75 -02 48 24.7 491767 W84 C~1Cs0 2013 08 30.265162 02 42 18.45 -01 03 06.3 23.8r 491767 W84 C~1Cs0 2013 08 30.288738 02 42 18.42 -01 03 06.8 22.9i 491767 W84 C~1Cs0 2013 08 30.292546 02 42 18.40 -01 03 06.9 23.1z 491767 W84 C~1Cs0 2013 09 08.296649 02 41 58.45 -01 07 06.3 24.3g 491767 W84 C~1Cs0 2013 09 08.298877 02 41 58.44 -01 07 06.1 23.2r 491767 W84 C~1Cs0 2013 09 08.301238 02 41 58.45 -01 07 05.9 23.3i 491767 W84 C~1Cs0 2013 09 08.305035 02 41 58.41 -01 07 05.9 23.0z 491767 W84 C~1Cs0 2013 09 10.38792 02 41 52.737 -01 08 03.78 24.0g 491767 W84 C~5204 2013 11 13.15868 02 36 50.045 -01 33 33.30 22.1z 491767 W84 C~5204 2013 12 28.13376 02 33 31.510 -01 31 29.25 24.8g 491767 W84 C~5204 2013 12 28.13513 02 33 31.520 -01 31 29.17 23.3r 491767 W84 C~5204 2014 08 19.39449 02 47 23.137 +00 13 16.99 23.2z 491767 W84 C~5204 2014 09 03.397772 02 47 03.65 +00 07 38.3 24.3g 491767 W84 C~1Cs0 2014 09 03.406146 02 47 03.63 +00 07 38.2 23.4z 491767 W84 C~1Cs0 2014 09 30.28820 02 45 36.696 -00 04 19.11 23.5g 491767 W84 C~5204 2014 10 02.220718 02 45 28.25 -00 05 11.1 23.2r 491767 W84 C~1Cs0 2014 10 02.223067 02 45 28.23 -00 05 11.1 23.3i 491767 W84 C~1Cs0 2014 10 02.226875 02 45 28.20 -00 05 11.1 22.7z 491767 W84 C~1Cs0 2014 10 22.120961 02 43 49.67 -00 13 34.2 23.3r 491767 W84 C~1Cs0 2014 10 22.123310 02 43 49.67 -00 13 34.5 23.1i 491767 W84 C~1Cs0 2014 10 22.127118 02 43 49.64 -00 13 34.5 22.9z 491767 W84 C~1Cs0 2014 10 27.109352 02 43 22.54 -00 15 23.5 23.9i 491767 W84 C~1Cs0 2014 10 27.113148 02 43 22.54 -00 15 23.5 22.9z 491767 W84 C~1Cs0 2014 10 29.103333 02 43 11.57 -00 16 04.6 23.3r 491767 W84 C~1Cs0 2014 10 29.105694 02 43 11.54 -00 16 04.6 22.6i 491767 W84 C~1Cs0 2014 10 29.109491 02 43 11.52 -00 16 04.8 22.8z 491767 W84 C~1Cs0 2014 11 03.218530 02 42 43.15 -00 17 42.2 22.7r 491767 W84 C~1Cs0 2014 11 03.220891 02 42 43.14 -00 17 42.2 22.8i 491767 W84 C~1Cs0 2015 12 15.16097 02 44 04.722 +00 50 41.42 22.9i 491767 W84 C~5204 2016 09 23.29149 02 55 50.934 +02 23 58.33 22.8z 491767 W84 C~5204 2016 09 23.292847 02 55 50.92 +02 23 58.2 23.2i 491767 W84 C~2CgH 2016 09 23.29285 02 55 50.932 +02 23 58.11 23.2i 491767 W84 C~5204 2016 09 24.298345 02 55 47.20 +02 23 33.5 23.4r 491767 W84 C~2CgH 2016 09 24.29835 02 55 47.206 +02 23 33.38 23.3r 491767 W84 C~5204 2016 09 25.27517 02 55 43.543 +02 23 09.08 24.1g 491767 W84 C~5204 2016 10 26.224769 02 53 15.94 +02 10 57.3 23.5r 491767 W84 C~2CgH 2016 10 26.22477 02 53 15.951 +02 10 57.20 23.3r 491767 W84 C~5204 2016 11 19.17772 02 51 02.763 +02 04 34.53 23.1z 491767 W84 C~5204 2016 11 19.179097 02 51 02.76 +02 04 34.6 22.9i 491767 W84 C~2CgH 2016 11 19.17910 02 51 02.769 +02 04 34.45 22.6i 491767 W84 C~5204 2016 12 21.130243 02 48 31.16 +02 04 00.5 23.6r 491767 W84 C~2CgH 2016 12 21.13025 02 48 31.171 +02 04 00.26 23.4r 491767 W84 C~5204 2017 10 26.29745 02 58 12.155 +03 23 52.27 23.0g 491767 W84 C~5204 2017 11 01.19798 02 57 39.679 +03 21 57.98 23.6z 491767 W84 C~5204 2017 12 10.10738 02 54 11.428 +03 15 33.30 22.8r 491767 W84 C~5204 2017 12 10.10875 02 54 11.427 +03 15 33.20 22.6i 491767 W84 C~5204 2018 01 05.05847 02 52 36.792 +03 19 15.73 23.4r 491767 W84 C~5204 2018 01 05.05983 02 52 36.797 +03 19 15.67 24.3g 491767 W84 C~5204
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 0.23 0.00 -0.30
2 0.0000 0.00 0.23 0.00 -0.34
3 0.0000 0.00 0.24 0.00 -0.34
4 3.8300 0.00 -0.05 0.00 0.18
5 3.8300 0.00 0.07 0.00 0.20
6 3.8300 0.00 0.00 0.00 0.13
7 3.8301 0.00 0.03 0.00 0.19
8 3.8824 0.00 0.04 0.00 0.03
9 3.8824 0.00 0.13 0.00 0.02
10 4.6190 0.00 -0.05 0.00 -0.00
11 4.6191 0.00 0.15 0.00 0.10
12 4.6191 0.00 -0.04 0.00 0.09
13 4.6437 0.00 0.02 0.00 -0.27
14 4.6437 0.00 -0.04 0.00 -0.01
15 4.6437 0.00 0.21 0.00 0.25
16 4.6438 0.00 -0.24 0.00 0.36
17 4.6495 0.00 0.27 0.00 -0.01
18 4.8241 0.00 -0.13 0.00 -0.26
19 4.9472 0.00 -0.20 0.00 -0.16
20 4.9472 0.00 0.01 0.00 -0.11
21 5.5886 0.00 0.15 0.00 -0.13
22 5.6296 0.00 0.07 0.00 0.10
23 5.6297 0.00 0.04 0.00 0.21
24 5.7033 0.00 0.30 0.00 -0.25
25 5.7086 0.00 -0.04 0.00 0.13
26 5.7086 0.00 -0.18 0.00 0.19
27 5.7086 0.00 -0.38 0.00 0.29
28 5.7630 0.00 -0.26 0.00 0.19
29 5.7630 0.00 -0.07 0.00 -0.05
30 5.7631 0.00 -0.21 0.00 0.03
31 5.7767 0.00 -0.47 0.00 0.15
32 5.7767 0.00 -0.15 0.00 0.23
33 5.7822 0.00 -0.23 0.00 0.09
34 5.7822 0.00 -0.48 0.00 0.13
35 5.7822 0.00 -0.46 0.00 0.01
36 5.7962 0.00 -0.19 0.00 0.11
37 5.7962 0.00 -0.14 0.00 0.15
38 6.9103 0.00 0.09 0.00 -0.08
39 7.6855 0.00 0.15 0.00 0.02
40 7.6855 0.00 0.02 0.00 -0.07
41 7.6855 0.00 0.20 0.00 -0.16
42 7.6882 0.00 -0.07 0.00 0.13
43 7.6882 0.00 0.02 0.00 0.01
44 7.6909 0.00 0.31 0.00 -0.04
45 7.7756 0.00 -0.01 0.00 -0.05
46 7.7756 0.00 0.15 0.00 -0.15
47 7.8412 0.00 -0.06 0.00 0.05
48 7.8412 0.00 0.01 0.00 0.13
49 7.8412 0.00 0.14 0.00 -0.02
50 7.9287 0.00 -0.08 0.00 0.17
51 7.9287 0.00 0.09 0.00 -0.07
52 8.7752 0.00 0.43 0.00 -0.47
53 8.7913 0.00 0.30 0.00 -0.15
54 8.8978 0.00 -0.06 0.00 -0.11
55 8.8978 0.00 0.02 0.00 -0.21
56 8.9689 0.00 0.09 0.00 -0.07
57 8.9689 0.00 0.22 0.00 -0.16
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.
491767 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.812 39.812 39.812 ecceobj 0.084 0.084 0.084 incobj 30.079 30.079 30.079 qmin 35.261 35.217 34.938 qmax 43.999 44.235 44.429 amean 39.461 39.460 39.459 amin 39.103 39.103 39.101 amax 39.835 39.835 39.835 emean 0.058 0.062 0.073 emin 0.005 0.002 0.005 emax 0.106 0.113 0.119 imean 28.860 28.864 28.790 imin 28.325 28.331 28.312 imax 29.311 29.334 29.269 excite_mean 0.487 0.487 0.487 fracstop 1.000 1.000 1.000 cjmean 2.764 2.764 2.764 libcent 0 180.8 164.9 180.3 libamp 0 93.7 110.1 93.2 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 181.6 184.2 183.7 kozaiamp 180.0 180.0 180.0