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: 19SK235 # Created Mon Apr 28 01:11:17 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 2.10y # First observation: 2019/08/28 # Last observation: 2021/10/04 Preliminary a, adot, b, bdot, g, gdot: 0.000017 0.024168 -0.000000 -0.000054 0.024416 0.000000 # Chi-squared of fit: 10.24 DOF: 10 RMS: 0.20 # Min/Max residuals: -0.45 0.45 # Exact a, adot, b, bdot, g, gdot: 1.541928E-05 2.410419E-02 -2.886801E-07 -5.405502E-05 2.433425E-02 -8.642838E-04 # Covariance matrix: 7.4078E-13 1.6098E-12 3.5336E-16 -4.7957E-15 1.7139E-12 4.0825E-11 1.6098E-12 1.8658E-11 2.9418E-15 -5.1151E-14 1.0386E-11 4.3136E-10 3.5336E-16 2.9418E-15 3.8279E-13 -1.8914E-13 1.9108E-15 6.8243E-14 -4.7957E-15 -5.1151E-14 -1.8914E-13 1.7922E-13 -2.8042E-14 -1.1952E-12 1.7139E-12 1.0386E-11 1.9108E-15 -2.8042E-14 8.5382E-12 2.3795E-10 4.0825E-11 4.3136E-10 6.8243E-14 -1.1952E-12 2.3795E-10 1.0077E-08 # lat0 lon0 xBary yBary zBary JD0 -0.911965 -7.786448 0.302616 -0.015243 -0.957835 2458723.711696 # Heliocentric elements and errors Epoch: 2458720.5000 = 2019/08/25 Mean Anomaly: 322.29416 +/- 2.581 Argument of Peri: 303.64917 +/- 3.052 Long of Asc Node: 90.48741 +/- 0.064 Inclination: 0.90146 +/- 0.000 Eccentricity: 0.06232757 +/- 0.0028 Semi-Major Axis: 44.16610358 +/- 0.0192 Time of Perihelion: 2469949.4239 +/- 768.6 Perihelion: 41.41333774 +/- 0.1267 Aphelion: 46.91886942 +/- 0.1271 Period (y) 293.5228 +/- 0.19 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 41.62123693 +/- 0.0049 Ecliptic Y -6.00339101 +/- 0.0007 Ecliptic Z -0.65407216 +/- 0.0001 Ecliptic XDOT 0.00027945 +/- 0.0000 Ecliptic YDOT 0.00270071 +/- 0.0000 Ecliptic ZDOT -0.00000476 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.05705503 +/- 0.0048 Geocenter to KBO 41.09434053 +/- 0.0049 # Hcoef: 9.15
The following table shows the complete astrometric record for 19SK235. 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 (19SK235) followed by the observatory code and reference code for the source of the astrometry.
2019 08 28.210895 23 32 50.376 -03 55 37.58 25.3r 19SK235 W84 C~7XM7 2019 08 28.388381 23 32 49.620 -03 55 42.56 25.3r 19SK235 W84 C~7XM7 2019 09 29.013696 23 30 31.528 -04 10 32.39 25.2r 19SK235 W84 C~7XM7 2019 09 29.177510 23 30 30.814 -04 10 36.75 25.2r 19SK235 W84 C~7XM7 2021 09 06.108763 23 42 23.414 -02 54 22.60 25.4r 19SK235 W84 C~7XM7 2021 09 06.196686 23 42 22.988 -02 54 26.00 25.4r 19SK235 W84 C~7XM7 2021 10 04.002582 23 40 21.139 -03 07 32.34 25.2r 19SK235 W84 C~7XM7 2021 10 04.175328 23 40 20.396 -03 07 36.80 25.2r 19SK235 W84 C~7XM7
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 0.05
2 0.0005 -12.36 -0.05 -0.11 -0.06
3 0.0871 -2262.11 -0.03 -2.13 -0.05
4 0.0875 -2273.65 0.03 -1.93 0.05
5 2.0257 9340.41 0.45 -25.60 0.37
6 2.0260 9333.19 -0.45 -26.19 -0.23
7 2.1021 7342.55 -0.03 -23.06 -0.15
8 2.1026 7330.55 0.04 -22.74 0.03
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.
19SK235 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.247 44.285 44.209 ecceobj 0.067 0.066 0.067 incobj 0.901 0.901 0.901 qmin 40.179 40.285 40.109 qmax 48.276 48.253 48.252 amean 44.113 44.151 44.076 amin 43.765 43.795 43.716 amax 44.483 44.527 44.454 emean 0.069 0.069 0.070 emin 0.053 0.052 0.053 emax 0.086 0.084 0.086 imean 0.949 0.944 0.954 imin 0.077 0.091 0.066 imax 1.547 1.530 1.562 excite_mean 0.072 0.071 0.072 fracstop 1.000 1.000 1.000 cjmean 3.097 3.097 3.096 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 206.0 204.3 207.9 kozaiamp 180.0 179.9 179.9