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: 20UY73 # Created Mon Apr 28 01:11:24 2025 # Orbit generated from Bernstein formalism # Fitting 10 observations of 10 # Arc: 2.11y # First observation: 2019/08/28 # Last observation: 2021/10/07 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.024342 -0.000001 0.000410 0.024603 0.000000 # Chi-squared of fit: 8.47 DOF: 14 RMS: 0.16 # Min/Max residuals: -0.27 0.33 # Exact a, adot, b, bdot, g, gdot: 1.560689E-05 2.439260E-02 -3.676129E-08 4.116579E-04 2.463361E-02 1.179120E-03 # Covariance matrix: 7.4234E-13 3.9958E-12 -2.1947E-14 6.8087E-14 5.5928E-12 7.4284E-11 3.9958E-12 2.5027E-09 -1.2834E-11 4.1249E-11 2.9680E-09 4.4995E-08 -2.1947E-14 -1.2834E-11 6.2061E-13 -5.2543E-13 -1.5221E-11 -2.3076E-10 6.8087E-14 4.1249E-11 -5.2543E-13 9.2196E-13 4.8915E-11 7.4173E-10 5.5928E-12 2.9680E-09 -1.5221E-11 4.8915E-11 3.5214E-09 5.3357E-08 7.4284E-11 4.4995E-08 -2.3076E-10 7.4173E-10 5.3357E-08 8.0909E-07 # lat0 lon0 xBary yBary zBary JD0 -1.071346 -8.423952 0.291938 -0.017970 -0.961096 2458723.711696 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 47.70730 +/- 20.599 Argument of Peri: 259.57749 +/- 24.983 Long of Asc Node: 38.75812 +/- 0.048 Inclination: 1.41708 +/- 0.001 Eccentricity: 0.05735578 +/- 0.0286 Semi-Major Axis: 43.14341402 +/- 0.0699 Time of Perihelion: 2445003.7079 +/- 5922.5 Perihelion: 40.66888997 +/- 1.2348 Aphelion: 45.61793806 +/- 1.2352 Period (y) 283.3870 +/- 0.69 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 41.06090878 +/- 0.0967 Ecliptic Y -6.38256617 +/- 0.0143 Ecliptic Z -0.75902018 +/- 0.0018 Ecliptic XDOT 0.00053608 +/- 0.0001 Ecliptic YDOT 0.00266306 +/- 0.0000 Ecliptic ZDOT 0.00004307 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.56093709 +/- 0.0956 Geocenter to KBO 40.59494600 +/- 0.0978 # Hcoef: 9.77
The following table shows the complete astrometric record for 20UY73. 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 (20UY73) followed by the observatory code and reference code for the source of the astrometry.
2019 08 28.210895 23 30 44.603 -04 19 30.73 25.7r 20UY73 W84 C~7XOQ 2019 08 28.388381 23 30 43.843 -04 19 35.87 25.7r 20UY73 W84 C~7XOQ 2020 10 17.010669 23 32 14.461 -04 07 55.47 26.3r 20UY73 W84 C~7XOQ 2020 10 17.174574 23 32 13.865 -04 07 59.69 26.3r 20UY73 W84 C~7XOQ 2020 10 18.012125 23 32 10.811 -04 08 18.16 25.8r 20UY73 W84 C~7XOQ 2020 10 18.176134 23 32 10.175 -04 08 21.55 25.8r 20UY73 W84 C~7XOQ 2021 10 04.002582 23 38 13.638 -03 28 00.11 25.8r 20UY73 W84 C~7XOQ 2021 10 04.175328 23 38 12.901 -03 28 04.96 25.8r 20UY73 W84 C~7XOQ 2021 10 07.004805 23 38 00.987 -03 29 19.60 25.8r 20UY73 W84 C~7XOQ 2021 10 07.169933 23 38 00.297 -03 29 23.58 25.8r 20UY73 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 0.01 0.00 0.06
2 0.0005 -12.47 -0.00 -0.24 -0.21
3 1.1384 1509.53 -0.11 108.04 0.33
4 1.1388 1499.67 -0.01 107.69 -0.27
5 1.1411 1450.39 0.18 108.77 -0.06
6 1.1416 1440.31 -0.08 109.41 0.33
7 2.1021 7397.54 -0.09 179.65 0.10
8 2.1026 7385.47 -0.04 179.57 -0.18
9 2.1103 7191.87 -0.07 181.80 -0.17
10 2.1108 7180.80 0.20 182.25 0.07
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.
20UY73 quality flag:2 Type: CLASSICAL SCATNEAR CLASSICAL axisobj 43.171 43.594 43.135 ecceobj 0.056 0.137 0.048 incobj 1.418 1.415 1.418 qmin 40.058 34.060 40.346 qmax 46.283 53.404 45.882 amean 43.070 43.534 43.030 amin 42.737 43.129 42.699 amax 43.418 44.027 43.363 emean 0.048 0.172 0.042 emin 0.027 0.129 0.020 emax 0.066 0.216 0.058 imean 1.534 5.666 1.504 imin 0.341 1.694 0.287 imax 2.219 9.066 2.204 excite_mean 0.056 0.201 0.050 fracstop 1.000 1.000 1.000 cjmean 3.087 3.045 3.087 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 184.2 182.3 184.8 kozaiamp 180.0 180.0 180.0