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: 19AZ142 # Created Tue Apr 1 01:11:10 2025 # Orbit generated from Bernstein formalism # Fitting 9 observations of 9 # Arc: 60.87d # First observation: 2019/01/06 # Last observation: 2019/03/08 Preliminary a, adot, b, bdot, g, gdot: 0.000000 0.027754 -0.000000 0.004847 0.026349 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 3.87 DOF: 13 RMS: 0.12 # Min/Max residuals: -0.17 0.26 # Exact a, adot, b, bdot, g, gdot: 1.625360E-05 2.642631E-02 2.218805E-06 4.786456E-03 2.604789E-02 7.533161E-03 # Covariance matrix: 6.9798E-13 5.7422E-10 2.3097E-13 2.5389E-11 1.2554E-10 8.1793E-09 5.7422E-10 1.3737E-06 4.8350E-10 5.4603E-08 2.6350E-07 9.6090E-06 2.3097E-13 4.8350E-10 4.2572E-13 1.8008E-11 9.4831E-11 3.9554E-09 2.5389E-11 5.4603E-08 1.8008E-11 2.2283E-09 1.0658E-08 4.3261E-07 1.2554E-10 2.6350E-07 9.4831E-11 1.0658E-08 5.1657E-08 2.1488E-06 8.1793E-09 9.6090E-06 3.9554E-09 4.3261E-07 2.1488E-06 1.5129E-04 # lat0 lon0 xBary yBary zBary JD0 -11.253549 146.734637 0.653083 -0.145294 -0.730719 2458489.960331 # Heliocentric elements and errors Epoch: 2458480.5000 = 2018/12/28 Mean Anomaly: 47.72720 +/- 29.895 Argument of Peri: 233.79051 +/- 14.384 Long of Asc Node: 193.26501 +/- 1.370 Inclination: 14.82388 +/- 0.315 Eccentricity: 0.28357760 +/- 0.4885 Semi-Major Axis: 45.10356200 +/- 15.7928 Time of Perihelion: 2443812.2567 +/- 5006.3 Perihelion: 32.31320232 +/- 24.7681 Aphelion: 57.89392169 +/- 29.9394 Period (y) 302.9176 +/- 159.10 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.74716328 +/- 0.2747 Ecliptic Y 21.59993445 +/- 0.1802 Ecliptic Z -7.49197180 +/- 0.0654 Ecliptic XDOT -0.00224711 +/- 0.0011 Ecliptic YDOT -0.00184460 +/- 0.0006 Ecliptic ZDOT 0.00033870 +/- 0.0003 # Distances at JD0 (AU) Heliocenter to KBO 39.12248952 +/- 0.2444 Geocenter to KBO 38.39082783 +/- 0.3350 # Hcoef: 9.08
The following table shows the complete astrometric record for 19AZ142. 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 (19AZ142) followed by the observatory code and reference code for the source of the astrometry.
2019 01 06.45953 09 40 33.91 +02 00 09.4 25.4g 19AZ142 T09 C~870T 2019 01 06.56568 09 40 33.50 +02 00 10.2 25.6g 19AZ142 T09 C~870T 2019 01 06.60853 09 40 33.35 +02 00 10.7 26.3g 19AZ142 T09 C~870T 2019 01 08.47007 09 40 26.30 +02 00 30.0 24.5i 19AZ142 T09 C~870T 2019 01 08.49433 09 40 26.21 +02 00 30.1 24.6i 19AZ142 T09 C~870T 2019 01 08.51056 09 40 26.13 +02 00 30.5 24.4i 19AZ142 T09 C~870T 2019 03 08.26245 09 35 53.47 +02 24 13.1 24.7r 19AZ142 T09 C~870T 2019 03 08.31706 09 35 53.20 +02 24 14.8 25.0r 19AZ142 T09 C~870T 2019 03 08.32553 09 35 53.16 +02 24 15.1 25.0r 19AZ142 T09 C~870T
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 -0.04 0.00 0.14
2 0.0003 -6.06 -0.04 -1.29 -0.11
3 0.0004 -8.35 0.12 -1.57 0.04
4 0.0055 -114.43 0.00 -18.54 0.02
5 0.0056 -115.74 0.13 -18.89 -0.11
6 0.0056 -117.00 -0.17 -18.92 0.02
7 0.1665 -4445.04 0.26 -35.83 0.13
8 0.1666 -4449.42 -0.11 -35.57 -0.07
9 0.1666 -4450.09 -0.15 -35.49 -0.06
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.
19AZ142 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