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: 23DT6 # Created Mon Jul 7 01:12:05 2025 # Orbit generated from Bernstein formalism # Fitting 17 observations of 17 # Arc: 113.70d # First observation: 2023/02/14 # Last observation: 2023/06/08 Preliminary a, adot, b, bdot, g, gdot: -0.000041 0.029230 0.000035 0.001326 0.025438 0.000000 # Chi-squared of fit: 14.94 DOF: 28 RMS: 0.17 # Min/Max residuals: -0.34 0.46 # Exact a, adot, b, bdot, g, gdot: 1.740473E-05 2.590683E-02 -9.876492E-07 1.935812E-03 2.499779E-02 -1.269872E-03 # Covariance matrix: 2.4437E-13 -2.0970E-12 -7.2455E-15 3.5772E-13 3.3649E-13 1.0130E-10 -2.0970E-12 4.4406E-10 5.1858E-12 -7.7929E-11 5.8129E-11 -4.5053E-09 -7.2455E-15 5.1858E-12 2.2509E-13 -1.6268E-12 7.5059E-13 -4.3165E-11 3.5772E-13 -7.7929E-11 -1.6268E-12 2.0796E-11 -9.6096E-12 9.2823E-10 3.3649E-13 5.8129E-11 7.5059E-13 -9.6096E-12 1.1217E-11 -1.4519E-11 1.0130E-10 -4.5053E-09 -4.3165E-11 9.2823E-10 -1.4519E-11 1.4424E-07 # lat0 lon0 xBary yBary zBary JD0 -28.534991 179.392007 0.556475 -0.394005 -0.724245 2459989.863781 # Heliocentric elements and errors Epoch: 2459980.5000 = 2023/02/05 Mean Anomaly: 334.45398 +/- 4.488 Argument of Peri: 310.04395 +/- 6.097 Long of Asc Node: 260.20776 +/- 0.023 Inclination: 28.23475 +/- 0.001 Eccentricity: 0.12574374 +/- 0.0093 Semi-Major Axis: 45.75745991 +/- 0.1401 Time of Perihelion: 2468003.0411 +/- 1408.9 Perihelion: 40.00374582 +/- 0.4431 Aphelion: 51.51117400 +/- 0.4541 Period (y) 309.5288 +/- 1.42 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -35.95167206 +/- 0.0047 Ecliptic Y 0.93772118 +/- 0.0001 Ecliptic Z -19.10957822 +/- 0.0026 Ecliptic XDOT -0.00001070 +/- 0.0000 Ecliptic YDOT -0.00282861 +/- 0.0000 Ecliptic ZDOT 0.00025266 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.72564333 +/- 0.0043 Geocenter to KBO 40.00354067 +/- 0.0054 # Hcoef: 7.44
The following table shows the complete astrometric record for 23DT6. 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 (23DT6) followed by the observatory code and reference code for the source of the astrometry.
2023 02 14.36298 11 09 03.12 -25 45 28.28 23DT6 W84 C~8vOI 2023 02 14.37465 11 09 03.05 -25 45 28.65 23DT6 W84 C~8vOI 2023 02 17.31465 11 08 49.12 -25 45 10.01 23.5r 23DT6 W84 C~8vOI 2023 02 17.32682 11 08 49.06 -25 45 09.88 23DT6 W84 C~8vOI 2023 02 17.33897 11 08 49.00 -25 45 09.77 23DT6 W84 C~8vOI 2023 02 23.18637 11 08 20.40 -25 44 08.13 23DT6 W84 C~8vOI 2023 02 23.20045 11 08 20.34 -25 44 08.30 23DT6 W84 C~8vOI 2023 03 01.23653 11 07 49.95 -25 42 31.15 23DT6 W84 C~8vOI 2023 03 01.26078 11 07 49.81 -25 42 30.60 23DT6 W84 C~8vOI 2023 03 19.20946 11 06 18.74 -25 34 43.43 23DT6 W84 C~8vOI 2023 03 19.22162 11 06 18.70 -25 34 43.00 23DT6 W84 C~8vOI 2023 04 15.20877 11 04 19.11 -25 16 33.99 23DT6 W84 C~8vOI 2023 04 15.22092 11 04 19.03 -25 16 33.57 23DT6 W84 C~8vOI 2023 05 25.11193 11 02 56.92 -24 45 14.12 23DT6 W84 C~8vOI 2023 05 25.13620 11 02 56.92 -24 45 13.15 23DT6 W84 C~8vOI 2023 06 08.05453 11 03 03.46 -24 35 43.09 23DT6 W84 C~8vOI 2023 06 08.06664 11 03 03.47 -24 35 42.76 23DT6 W84 C~8vOI
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 -0.21 0.00 0.46
2 0.0000 -0.69 -0.19 -0.75 -0.02
3 0.0081 -177.75 0.08 -67.18 -0.01
4 0.0081 -178.53 0.05 -67.42 0.01
5 0.0081 -179.31 0.04 -67.68 0.02
6 0.0242 -553.12 0.09 -183.37 -0.09
7 0.0242 -553.77 0.39 -183.88 -0.34
8 0.0407 -964.97 -0.02 -278.84 -0.07
9 0.0408 -966.91 -0.24 -279.19 -0.07
10 0.0899 -2277.73 -0.13 -408.85 -0.14
11 0.0900 -2278.41 0.12 -408.71 0.02
12 0.1638 -4215.17 0.23 -160.76 0.34
13 0.1639 -4216.32 -0.12 -160.87 0.00
14 0.2731 -6060.92 -0.16 1014.25 0.00
15 0.2732 -6061.36 -0.03 1015.12 -0.05
16 0.3113 -6239.54 0.04 1564.25 0.04
17 0.3113 -6239.57 0.06 1564.61 -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.
23DT6 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 45.958 46.138 45.785 ecceobj 0.128 0.138 0.123 incobj 28.201 28.199 28.204 qmin 39.375 39.022 39.422 qmax 53.205 53.939 52.796 amean 46.126 46.314 45.952 amin 45.745 45.932 45.582 amax 46.546 46.736 46.370 emean 0.129 0.140 0.125 emin 0.116 0.126 0.112 emax 0.143 0.155 0.139 imean 29.725 29.714 29.731 imin 29.424 29.402 29.433 imax 30.022 30.031 30.010 excite_mean 0.512 0.515 0.511 fracstop 1.000 1.000 1.000 cjmean 2.784 2.783 2.783 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 178.1 177.9 179.3 kozaiamp 179.9 180.0 179.9