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: 20UE74 # Created Mon Apr 28 01:11:24 2025 # Orbit generated from Bernstein formalism # Fitting 10 observations of 10 # Arc: 2.03y # First observation: 2019/08/30 # Last observation: 2021/09/09 Preliminary a, adot, b, bdot, g, gdot: -0.000002 0.022918 -0.000000 0.000286 0.023781 0.000000 # Chi-squared of fit: 8.10 DOF: 14 RMS: 0.16 # Min/Max residuals: -0.33 0.36 # Exact a, adot, b, bdot, g, gdot: 1.500574E-05 2.295716E-02 2.752717E-07 2.876662E-04 2.379505E-02 1.627765E-03 # Covariance matrix: 7.3903E-13 7.3879E-13 -3.8936E-15 1.0864E-14 1.6714E-12 2.2710E-11 7.3879E-13 4.5348E-12 -1.3729E-14 5.2723E-14 5.5613E-12 1.0549E-10 -3.8936E-15 -1.3729E-14 3.4447E-13 -2.2465E-13 -1.9738E-14 -3.3379E-13 1.0864E-14 5.2723E-14 -2.2465E-13 2.5674E-13 6.6153E-14 1.3057E-12 1.6714E-12 5.5613E-12 -1.9738E-14 6.6153E-14 8.2177E-12 1.3466E-10 2.2710E-11 1.0549E-10 -3.3379E-13 1.3057E-12 1.3466E-10 2.6069E-09 # lat0 lon0 xBary yBary zBary JD0 -2.806497 -7.976518 0.266651 -0.047405 -0.967141 2458725.713221 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 68.91186 +/- 0.286 Argument of Peri: 207.58046 +/- 0.531 Long of Asc Node: 67.35863 +/- 0.025 Inclination: 2.83057 +/- 0.000 Eccentricity: 0.07061274 +/- 0.0022 Semi-Major Axis: 43.91462235 +/- 0.0089 Time of Perihelion: 2438373.3478 +/- 84.1 Perihelion: 40.81369045 +/- 0.0949 Aphelion: 47.01555425 +/- 0.0950 Period (y) 291.0194 +/- 0.09 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 42.49380272 +/- 0.0050 Ecliptic Y -6.23018952 +/- 0.0007 Ecliptic Z -2.05768703 +/- 0.0002 Ecliptic XDOT 0.00056187 +/- 0.0000 Ecliptic YDOT 0.00259029 +/- 0.0000 Ecliptic ZDOT 0.00002366 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.99735581 +/- 0.0049 Geocenter to KBO 42.02554427 +/- 0.0051 # Hcoef: 9.15
The following table shows the complete astrometric record for 20UE74. 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 (20UE74) followed by the observatory code and reference code for the source of the astrometry.
2019 08 30.212420 23 35 08.803 -05 44 32.40 25.4r 20UE74 W84 C~7XOQ 2019 08 30.387214 23 35 08.061 -05 44 37.38 25.4r 20UE74 W84 C~7XOQ 2019 09 28.012277 23 33 04.511 -05 57 47.69 25.2r 20UE74 W84 C~7XOQ 2019 09 28.177548 23 33 03.753 -05 57 52.26 25.2r 20UE74 W84 C~7XOQ 2020 10 20.004233 23 36 24.451 -05 34 31.18 25.9r 20UE74 W84 C~7XOQ 2020 10 20.172968 23 36 23.815 -05 34 34.74 25.9r 20UE74 W84 C~7XOQ 2020 10 22.003924 23 36 17.524 -05 35 10.35 25.4r 20UE74 W84 C~7XOQ 2020 10 22.173214 23 36 16.932 -05 35 13.49 25.4r 20UE74 W84 C~7XOQ 2021 09 09.073508 23 44 03.329 -04 44 49.77 25.1r 20UE74 W84 C~7XOQ 2021 09 09.192572 23 44 02.810 -04 44 52.86 25.1r 20UE74 W84 C~7XOQ
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 -0.02
2 0.0005 -12.14 -0.07 -0.19 -0.13
3 0.0788 -2018.04 0.34 3.06 0.00
4 0.0793 -2030.24 -0.33 3.33 0.03
5 1.1411 1275.00 0.36 104.68 0.13
6 1.1416 1264.87 -0.18 105.18 0.12
7 1.1466 1164.53 -0.07 109.71 -0.05
8 1.1471 1155.17 -0.11 110.33 0.05
9 2.0284 8755.69 -0.05 112.83 -0.20
10 2.0287 8747.33 0.05 113.10 0.05
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.
20UE74 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.941 43.974 43.909 ecceobj 0.067 0.071 0.063 incobj 2.831 2.831 2.831 qmin 40.389 40.218 40.495 qmax 47.513 47.675 47.329 amean 43.827 43.861 43.794 amin 43.475 43.514 43.449 amax 44.194 44.227 44.150 emean 0.057 0.061 0.053 emin 0.040 0.044 0.035 emax 0.076 0.079 0.072 imean 1.239 1.237 1.241 imin 0.368 0.367 0.367 imax 1.923 1.921 1.923 excite_mean 0.062 0.065 0.058 fracstop 1.000 1.000 1.000 cjmean 3.095 3.095 3.095 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 196.3 202.0 191.5 kozaiamp 180.0 180.0 180.0