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: 19PT99 # Created Wed May 21 01:11:19 2025 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 23.97h # First observation: 2019/08/06 # Last observation: 2019/08/07 # WARNING Fitting with energy constraint # WARNING and with gdot fixed = 0 # Chi-squared of fit: 0.84 DOF: 12 RMS: 0.06 # Min/Max residuals: -0.09 0.10 # Exact a, adot, b, bdot, g, gdot: 1.444770E-05 2.121723E-02 -4.331084E-06 -6.058825E-03 2.309727E-02 0.000000E+00 # Covariance matrix: 3.3137E-11 4.7755E-08 -1.9282E-12 -2.7647E-09 8.2112E-09 0.0000E+00 4.7755E-08 6.9611E-05 -2.8025E-09 -4.0180E-06 1.1934E-05 0.0000E+00 -1.9282E-12 -2.8025E-09 3.4375E-13 9.1970E-11 -4.8116E-10 0.0000E+00 -2.7647E-09 -4.0180E-06 9.1970E-11 3.3639E-07 -6.8987E-07 0.0000E+00 8.2112E-09 1.1934E-05 -4.8116E-10 -6.8987E-07 2.0490E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.6215E-04 # lat0 lon0 xBary yBary zBary JD0 -9.496223 -65.372553 -0.321348 -0.157493 -0.941439 2458701.537291 # Heliocentric elements and errors Epoch: 2458700.5000 = 2019/08/05 Mean Anomaly: 13.69404 +/- 357.142 Argument of Peri: 196.44134 +/- 66.092 Long of Asc Node: 85.37017 +/- 7.804 Inclination: 18.28297 +/- 4.115 Eccentricity: 0.02960629 +/- 0.5699 Semi-Major Axis: 45.55389820 +/- 23.9330 Time of Perihelion: 2454428.6503 +/- 335997.0 Perihelion: 44.20521645 +/- 34.8328 Aphelion: 46.90257995 +/- 35.7932 Period (y) 307.4656 +/- 242.30 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 18.48754651 +/- 1.1026 Ecliptic Y -39.55865763 +/- 2.4058 Ecliptic Z -7.14310706 +/- 0.4427 Ecliptic XDOT 0.00224529 +/- 0.0010 Ecliptic YDOT 0.00115609 +/- 0.0014 Ecliptic ZDOT -0.00070857 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 44.24591222 +/- 2.2008 Geocenter to KBO 43.29515356 +/- 2.6832 # Hcoef: 6.83
The following table shows the complete astrometric record for 19PT99. 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 (19PT99) followed by the observatory code and reference code for the source of the astrometry.
2019 08 06.03649 19 54 00.07 -30 31 52.31 19PT99 W84 C~8r9E 2019 08 06.04376 19 54 00.04 -30 31 52.41 23.2r 19PT99 W84 C~8r9E 2019 08 06.05105 19 53 59.99 -30 31 52.50 19PT99 W84 C~8r9E 2019 08 06.05832 19 53 59.96 -30 31 52.70 19PT99 W84 C~8r9E 2019 08 06.99897 19 53 55.37 -30 32 03.33 19PT99 W84 C~8r9E 2019 08 07.00623 19 53 55.33 -30 32 03.25 19PT99 W84 C~8r9E 2019 08 07.02813 19 53 55.22 -30 32 03.65 19PT99 W84 C~8r9E 2019 08 07.03541 19 53 55.18 -30 32 03.68 19PT99 W84 C~8r9E
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 0.04
2 0.0000 -0.40 0.09 -0.02 0.01
3 0.0000 -1.05 -0.08 0.01 0.04
4 0.0001 -1.47 -0.03 -0.11 -0.09
5 0.0026 -61.71 0.05 0.87 -0.08
6 0.0027 -62.20 0.03 1.04 0.10
7 0.0027 -63.67 -0.02 0.93 -0.04
8 0.0027 -64.19 -0.06 1.00 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.
19PT99 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