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: 21TH192 # Created Tue Apr 1 01:11:27 2025 # Orbit generated from Bernstein formalism # Fitting 10 observations of 10 # Arc: 2.09y # First observation: 2019/08/29 # Last observation: 2021/10/02 Preliminary a, adot, b, bdot, g, gdot: 0.000006 0.024630 -0.000000 -0.000062 0.024852 0.000000 # Chi-squared of fit: 0.51 DOF: 14 RMS: 0.04 # Min/Max residuals: -0.08 0.06 # Exact a, adot, b, bdot, g, gdot: 1.550530E-05 2.459060E-02 -5.092793E-08 -6.145714E-05 2.473808E-02 -1.459702E-04 # Covariance matrix: 7.2904E-13 -1.7452E-12 1.4030E-16 3.5363E-15 -1.2461E-12 -2.8171E-11 -1.7452E-12 9.3804E-11 -5.5266E-14 -2.1241E-13 1.0694E-10 1.7479E-09 1.4030E-16 -5.5266E-14 6.1839E-13 -3.1987E-13 -6.6162E-14 -1.0200E-12 3.5363E-15 -2.1241E-13 -3.1987E-13 2.1767E-13 -2.4141E-13 -3.9724E-12 -1.2461E-12 1.0694E-10 -6.6162E-14 -2.4141E-13 1.2383E-10 1.9905E-09 -2.8171E-11 1.7479E-09 -1.0200E-12 -3.9724E-12 1.9905E-09 3.2672E-08 # lat0 lon0 xBary yBary zBary JD0 -1.931729 -10.227462 0.245010 -0.032832 -0.973591 2458724.712719 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 347.16849 +/- 9.904 Argument of Peri: 279.20996 +/- 10.743 Long of Asc Node: 84.07271 +/- 0.034 Inclination: 1.89228 +/- 0.000 Eccentricity: 0.03893441 +/- 0.0023 Semi-Major Axis: 43.03221175 +/- 0.0469 Time of Perihelion: 2462395.5591 +/- 2836.6 Perihelion: 41.35677797 +/- 0.1082 Aphelion: 44.70764553 +/- 0.1098 Period (y) 282.2921 +/- 0.46 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 40.67661605 +/- 0.0179 Ecliptic Y -7.59444235 +/- 0.0032 Ecliptic Z -1.36262320 +/- 0.0006 Ecliptic XDOT 0.00047557 +/- 0.0000 Ecliptic YDOT 0.00268177 +/- 0.0000 Ecliptic ZDOT -0.00000648 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.40192495 +/- 0.0176 Geocenter to KBO 40.42350946 +/- 0.0182 # Hcoef: 7.80
The following table shows the complete astrometric record for 21TH192. 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 (21TH192) followed by the observatory code and reference code for the source of the astrometry.
2019 08 29.211918 23 25 27.040 -05 49 35.07 23.7r 21TH192 W84 C~7XPv 2019 08 29.387113 23 25 26.264 -05 49 40.09 23.7r 21TH192 W84 C~7XPv 2020 10 16.001792 23 27 10.910 -05 38 19.65 23.7r 21TH192 W84 C~7XPv 2020 10 16.175804 23 27 10.252 -05 38 23.50 23.7r 21TH192 W84 C~7XPv 2021 09 13.055538 23 34 45.459 -04 50 19.90 23.6r 21TH192 W84 C~7XPv 2021 09 13.174687 23 34 44.912 -04 50 23.46 23.6r 21TH192 W84 C~7XPv 2021 10 02.07500 23 33 20.80 -04 59 16.0 24.1V 21TH192 W84 C~7XPv 2021 10 02.09757 23 33 20.70 -04 59 16.7 24.5V 21TH192 W84 C~7XPv 2021 10 02.14223 23 33 20.50 -04 59 17.8 24.5V 21TH192 W84 C~7XPv 2021 10 02.16466 23 33 20.40 -04 59 18.4 24.1V 21TH192 W84 C~7XPv
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 0.04 0.00 0.00
2 0.0005 -12.62 -0.04 -0.06 -0.01
3 1.1329 1691.01 0.02 10.28 0.02
4 1.1334 1680.46 -0.03 10.62 -0.00
5 2.0420 9071.85 0.03 -30.96 -0.01
6 2.0423 9062.92 -0.03 -30.99 -0.08
7 2.0941 7695.50 0.06 -21.13 0.02
8 2.0941 7693.85 0.01 -21.18 -0.06
9 2.0943 7690.67 -0.02 -21.00 0.05
10 2.0943 7689.06 -0.05 -20.96 0.06
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.
21TH192 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.066 43.143 43.010 ecceobj 0.042 0.048 0.041 incobj 1.894 1.894 1.894 qmin 39.973 39.619 40.145 qmax 46.113 46.682 45.881 amean 42.964 43.038 42.911 amin 42.631 42.701 42.574 amax 43.314 43.398 43.253 emean 0.048 0.057 0.044 emin 0.024 0.035 0.020 emax 0.065 0.076 0.061 imean 1.028 1.023 1.048 imin 0.526 0.502 0.529 imax 1.503 1.543 1.514 excite_mean 0.051 0.060 0.047 fracstop 1.000 1.000 1.000 cjmean 3.086 3.086 3.086 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 181.5 182.7 193.7 kozaiamp 180.0 179.9 179.9