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: 438028 # Created Thu Apr 18 01:07:54 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 33 observations of 33 # Arc: 19.09y # First observation: 2000/05/04 # Last observation: 2019/06/06 # Chi-squared of fit: 137.92 DOF: 60 RMS: 0.36 # Min/Max residuals: -1.66 1.08 # Exact a, adot, b, bdot, g, gdot: 2.026393E-05 4.793877E-02 1.118591E-06 1.417263E-03 3.595133E-02 -7.778613E-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 -2.641868 168.888602 -0.832759 -0.027021 -0.580758 2451668.739545 # Heliocentric elements and errors Epoch: 2451668.5000 = 2000/05/04 Mean Anomaly: 2.15391 +/- 0.000 Argument of Peri: 300.53689 +/- 0.000 Long of Asc Node: 226.02060 +/- 0.000 Inclination: 3.13972 +/- 0.000 Eccentricity: 0.27746266 +/- 0.0000 Semi-Major Axis: 39.28919251 +/- 0.0000 Time of Perihelion: 2451130.3137 +/- 0.0 Perihelion: 28.38790878 +/- 0.0000 Aphelion: 50.19047623 +/- 0.0000 Period (y) 246.2736 +/- 0.00 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -27.98963059 +/- 0.0000 Ecliptic Y 4.65279974 +/- 0.0000 Ecliptic Z -1.28203117 +/- 0.0000 Ecliptic XDOT -0.00065683 +/- 0.0000 Ecliptic YDOT -0.00358631 +/- 0.0000 Ecliptic ZDOT 0.00011068 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 28.40265960 +/- 0.0000 Geocenter to KBO 27.81542815 +/- 0.0000 # Hcoef: 8.01
The following table shows the complete astrometric record for 438028. 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 (438028) followed by the observatory code and reference code for the source of the astrometry.
2000 05 04.238802 11 15 00.20 +01 57 53.7 21.8V 438028 645 C~2KNU 2000 05 04.239631 11 15 00.18 +01 57 53.8 21.3V 438028 645 C~2KNU 2000 05 04.242119 11 15 00.20 +01 57 53.8 22.8V 438028 645 C~2KNU 2004 03 15.28675 12 00 27.99 -02 33 49.5 22.0R 438028 695 Ck9976 2004 03 16.25231 12 00 22.02 -02 33 10.1 438028 695 Ck9976 2004 03 16.30835 12 00 21.67 -02 33 07.9 438028 695 Ck9976 2004 04 21.37348 11 56 51.17 -02 08 56.0 22.2R 438028 568 Ck9976 2004 04 21.40905 11 56 50.99 -02 08 54.6 438028 568 Ck9976 2004 04 22.33222 11 56 46.45 -02 08 21.5 438028 568 Ck9976 2004 05 07.34612 11 55 42.67 -02 00 18.3 22.9R 438028 568 Ck9976 2004 05 07.35867 11 55 42.63 -02 00 18.2 438028 568 Ck9976 2004 05 07.40171 11 55 42.47 -02 00 16.7 438028 568 Ck9976 2004 05 08.37861 11 55 39.07 -01 59 49.6 22.8R 438028 568 Ck9976 2004 07 15.97823 11 56 20.96 -01 57 36.8 20.9R 438028 807 Cl0712 2004 07 16.02467 11 56 21.17 -01 57 37.9 438028 807 Cl0712 2005 02 09.42608 12 13 45.51 -03 52 19.0 22.8R 438028 688 Cq6071 2005 02 09.50277 12 13 45.15 -03 52 17.7 438028 688 Cq6071 2006 02 25.39460 12 22 42.60 -04 43 18.5 23.0R 438028 688 Cq6071 2006 02 25.51254 12 22 42.00 -04 43 14.7 438028 688 Cq6071 2007 02 15.43006 12 33 36.91 -05 45 25.1 22.4R 438028 688 Cu2342 2007 02 15.50448 12 33 36.64 -05 45 24.7 438028 688 Cu2342 2009 03 24.29504 12 50 28.67 -07 16 56.7 22.4R 438028 688 C~05Wr 2009 03 24.34358 12 50 28.32 -07 16 54.5 438028 688 C~05Wr 2009 04 27.16960 12 47 05.69 -06 54 43.4 22.8R 438028 688 C~06fy 2009 04 27.25545 12 47 05.18 -06 54 39.8 438028 688 C~06fy 2014 05 30.20627 13 33 38.82 -10 54 29.0 22.7R 438028 695 C~1LJI 2014 05 30.30727 13 33 38.39 -10 54 26.2 438028 695 C~1LJI 2015 04 18.35058 13 47 07.69 -12 04 11.7 438028 W84 C~1Tih 2015 04 21.33855 13 46 49.31 -12 02 25.3 23.4V 438028 W84 C~1Tih 2015 04 22.33797 13 46 43.18 -12 01 49.7 438028 W84 C~1Tih 2019 06 06.202230 14 20 33.953 -14 27 02.62 22.9G 438028 G37 C~39c6 2019 06 06.246840 14 20 33.747 -14 27 01.44 438028 G37 C~39c6 2019 06 06.291630 14 20 33.574 -14 27 00.30 438028 G37 C~39c6
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 0.12 0.00 -0.16
2 0.0000 0.00 -0.15 0.00 -0.08
3 0.0000 0.00 0.26 0.00 -0.14
4 3.8632 0.00 -0.01 0.00 0.18
5 3.8659 0.00 0.01 0.00 0.25
6 3.8660 0.00 0.06 0.00 0.16
7 3.9648 0.00 0.04 0.00 -0.01
8 3.9649 0.00 0.05 0.00 0.10
9 3.9674 0.00 0.04 0.00 -0.05
10 4.0085 0.00 -0.01 0.00 0.14
11 4.0085 0.00 0.08 0.00 -0.11
12 4.0087 0.00 0.03 0.00 0.18
13 4.0113 0.00 0.15 0.00 0.15
14 4.1991 0.00 -0.03 0.00 -0.03
15 4.1993 0.00 -0.11 0.00 0.03
16 4.7698 0.00 -0.27 0.00 0.63
17 4.7701 0.00 -0.88 0.00 0.11
18 5.8129 0.00 -0.50 0.00 0.29
19 5.8132 0.00 -0.22 0.00 0.34
20 6.7849 0.00 0.49 0.00 -0.29
21 6.7851 0.00 1.08 0.00 -1.66
22 8.8872 0.00 0.58 0.00 -0.64
23 8.8874 0.00 -0.18 0.00 -0.31
24 8.9800 0.00 -0.16 0.00 0.00
25 8.9802 0.00 -0.63 0.00 0.40
26 14.0697 0.00 0.08 0.00 0.27
27 14.0700 0.00 -0.19 0.00 0.44
28 14.9544 0.00 0.03 0.00 0.06
29 14.9626 0.00 0.09 0.00 -0.02
30 14.9654 0.00 0.26 0.00 -0.09
31 19.0882 0.00 -0.23 0.00 -0.10
32 19.0883 0.00 -0.24 0.00 -0.01
33 19.0884 0.00 0.25 0.00 0.03
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.
438028 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.245 39.245 39.245 ecceobj 0.277 0.277 0.277 incobj 3.139 3.139 3.139 qmin 27.826 27.826 27.826 qmax 51.814 51.814 51.814 amean 39.455 39.455 39.455 amin 38.944 38.951 38.952 amax 40.056 40.057 40.069 emean 0.280 0.280 0.280 emin 0.264 0.264 0.264 emax 0.295 0.295 0.295 imean 4.596 4.596 4.597 imin 4.117 4.117 4.117 imax 5.185 5.186 5.183 excite_mean 0.291 0.291 0.291 fracstop 1.000 1.000 1.000 cjmean 2.954 2.954 2.954 libcent 0 180.0 180.0 180.0 libamp 0 96.1 96.1 96.1 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 184.0 184.1 184.0 kozaiamp 180.0 180.0 180.0