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: 20AV30 # Created Fri Jan 24 02:11:43 2025 # Orbit generated from Bernstein formalism # Fitting 11 observations of 11 # Arc: 27.97d # First observation: 2020/01/02 # Last observation: 2020/01/30 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.018227 0.000001 -0.003476 0.019949 0.000000 # WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution # WARNING Fitting with energy constraint # Chi-squared of fit: 3.31 DOF: 17 RMS: 0.10 # Min/Max residuals: -0.17 0.18 # Exact a, adot, b, bdot, g, gdot: 1.394090E-05 1.695880E-02 -2.061480E-06 -3.541131E-03 1.954864E-02 -2.023100E-03 # Covariance matrix: 6.0798E-13 8.4971E-10 8.3308E-14 6.4694E-11 2.0416E-10 8.8362E-09 8.4971E-10 1.9292E-06 1.8152E-10 1.4911E-07 4.5332E-07 1.2828E-05 8.3308E-14 1.8152E-10 2.3125E-13 1.0953E-11 4.3325E-11 1.7638E-09 6.4694E-11 1.4911E-07 1.0953E-11 1.1711E-08 3.4778E-08 7.7366E-07 2.0416E-10 4.5332E-07 4.3325E-11 3.4778E-08 1.0735E-07 3.7019E-06 8.8362E-09 1.2828E-05 1.7638E-09 7.7366E-07 3.7019E-06 6.5669E-04 # lat0 lon0 xBary yBary zBary JD0 -4.368291 161.769111 0.861315 -0.037370 -0.489385 2458851.042421 # Heliocentric elements and errors Epoch: 2458850.5000 = 2020/01/02 Mean Anomaly: 293.68507 +/- 49.923 Argument of Peri: 282.09990 +/- 124.695 Long of Asc Node: 321.16107 +/- 2.190 Inclination: 12.67627 +/- 1.305 Eccentricity: 0.14064303 +/- 1.4826 Semi-Major Axis: 53.71963888 +/- 19.4302 Time of Perihelion: 2485342.0190 +/- 13825.7 Perihelion: 46.16434623 +/- 81.3781 Aphelion: 61.27493153 +/- 82.6727 Period (y) 393.7385 +/- 213.62 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -48.63864477 +/- 0.8120 Ecliptic Y 16.92053786 +/- 0.2675 Ecliptic Z -3.89643437 +/- 0.0653 Ecliptic XDOT -0.00043049 +/- 0.0034 Ecliptic YDOT -0.00235411 +/- 0.0011 Ecliptic ZDOT -0.00047316 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 51.64498589 +/- 0.7697 Geocenter to KBO 51.15444290 +/- 0.8574 # Hcoef: 7.47
The following table shows the complete astrometric record for 20AV30. 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 (20AV30) followed by the observatory code and reference code for the source of the astrometry.
2020 01 02.54162 10 46 04.98 +03 06 25.0 24.8r 20AV30 T09 C~8SiP 2020 01 02.55500 10 46 04.96 +03 06 25.1 24.6r 20AV30 T09 C~8SiP 2020 01 02.56558 10 46 04.95 +03 06 25.3 24.5r 20AV30 T09 C~8SiP 2020 01 03.46461 10 46 03.36 +03 06 28.3 26.1g 20AV30 T09 C~8SiP 2020 01 03.47507 10 46 03.35 +03 06 28.5 25.4g 20AV30 T09 C~8SiP 2020 01 03.49814 10 46 03.30 +03 06 28.8 25.5g 20AV30 T09 C~8SiP 2020 01 03.51702 10 46 03.28 +03 06 28.7 25.5g 20AV30 T09 C~8SiP 2020 01 30.45401 10 44 53.89 +03 10 42.4 23.6z 20AV30 T09 C~8SiP 2020 01 30.45669 10 44 53.88 +03 10 42.4 23.9z 20AV30 T09 C~8SiP 2020 01 30.49454 10 44 53.75 +03 10 43.1 23.9z 20AV30 T09 C~8SiP 2020 01 30.50811 10 44 53.70 +03 10 43.1 23.9z 20AV30 T09 C~8SiP
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 -0.05 0.00 -0.17
2 0.0000 -0.32 -0.01 -0.02 -0.09
3 0.0001 -0.53 0.05 0.11 0.11
4 0.0025 -23.71 -0.03 -6.13 -0.17
5 0.0026 -23.92 0.04 -6.00 0.03
6 0.0026 -24.73 -0.14 -6.00 0.18
7 0.0027 -24.97 0.13 -6.21 0.11
8 0.0764 -1083.01 0.06 -164.45 0.03
9 0.0764 -1083.15 0.06 -164.51 -0.02
10 0.0765 -1085.22 -0.06 -164.59 0.10
11 0.0766 -1085.91 -0.06 -164.88 -0.11
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.
20AV30 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0