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: 19PK99 # Created Mon Apr 28 01:11:16 2025 # Orbit generated from Bernstein formalism # Fitting 6 observations of 6 # Arc: 1.04d # First observation: 2019/08/05 # Last observation: 2019/08/07 # WARNING Fitting with energy constraint # WARNING and with gdot fixed = 0 # Chi-squared of fit: 0.09 DOF: 8 RMS: 0.02 # Min/Max residuals: -0.03 0.04 # Exact a, adot, b, bdot, g, gdot: 1.652940E-05 2.855386E-02 -1.187903E-06 -2.247455E-03 2.749405E-02 0.000000E+00 # Covariance matrix: 4.0942E-11 7.0340E-08 -2.9589E-12 -5.1696E-09 1.2318E-08 0.0000E+00 7.0340E-08 1.2199E-04 -5.1212E-09 -8.9474E-06 2.1320E-05 0.0000E+00 -2.9589E-12 -5.1212E-09 4.8321E-13 3.1777E-10 -8.9609E-10 0.0000E+00 -5.1696E-09 -8.9474E-06 3.1777E-10 8.0423E-07 -1.5656E-06 0.0000E+00 1.2318E-08 2.1320E-05 -8.9609E-10 -1.5656E-06 3.7305E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 2.7349E-04 # lat0 lon0 xBary yBary zBary JD0 -10.282934 -68.333828 -0.369419 -0.167267 -0.921909 2458701.486281 # Heliocentric elements and errors Epoch: 2458700.5000 = 2019/08/05 Mean Anomaly: 17.98058 +/- 245.599 Argument of Peri: 227.42267 +/- 313.956 Long of Asc Node: 46.00720 +/- 3.831 Inclination: 10.93054 +/- 0.318 Eccentricity: 0.03293471 +/- 0.5802 Semi-Major Axis: 38.50554067 +/- 20.4307 Time of Perihelion: 2454341.5239 +/- 234061.4 Perihelion: 37.23737169 +/- 29.8244 Aphelion: 39.77370966 +/- 30.7325 Period (y) 238.9423 +/- 190.17 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 13.90495827 +/- 0.9280 Ecliptic Y -34.00072682 +/- 2.3365 Ecliptic Z -6.49266688 +/- 0.4561 Ecliptic XDOT 0.00263619 +/- 0.0010 Ecliptic YDOT 0.00108724 +/- 0.0015 Ecliptic ZDOT -0.00022043 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 37.30351206 +/- 2.1590 Geocenter to KBO 36.37150724 +/- 2.5551 # Hcoef: 8.56
The following table shows the complete astrometric record for 19PK99. 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 (19PK99) followed by the observatory code and reference code for the source of the astrometry.
2019 08 05.98548 19 41 15.73 -31 50 15.94 24.2r 19PK99 W84 C~8nhw 2019 08 06.00005 19 41 15.65 -31 50 16.03 19PK99 W84 C~8nhw 2019 08 06.01463 19 41 15.56 -31 50 16.13 19PK99 W84 C~8nhw 2019 08 06.02919 19 41 15.48 -31 50 16.27 19PK99 W84 C~8nhw 2019 08 06.99165 19 41 10.00 -31 50 23.34 19PK99 W84 C~8nhw 2019 08 07.02083 19 41 09.83 -31 50 23.61 19PK99 W84 C~8nhw
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 -0.02 0.00 -0.02
2 0.0000 -1.02 0.04 0.09 -0.00
3 0.0001 -2.17 -0.03 0.19 0.03
4 0.0001 -3.19 0.02 0.23 -0.00
5 0.0028 -73.20 0.02 5.33 0.02
6 0.0028 -75.38 -0.02 5.43 -0.02
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.
19PK99 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