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: 19AL142 # Created Sun Dec 22 02:11:03 2024 # Orbit generated from Bernstein formalism # Fitting 13 observations of 13 # Arc: 83.98d # First observation: 2019/01/11 # Last observation: 2019/04/05 Preliminary a, adot, b, bdot, g, gdot: -0.000006 0.012275 -0.000004 0.002318 0.019336 0.000000 # Chi-squared of fit: 6.45 DOF: 20 RMS: 0.12 # Min/Max residuals: -0.27 0.26 # Exact a, adot, b, bdot, g, gdot: 1.283297E-05 1.633544E-02 2.806791E-06 2.440641E-03 1.996117E-02 3.118908E-03 # Covariance matrix: 5.0177E-13 1.7441E-11 2.1579E-14 7.1994E-13 4.1835E-12 1.8797E-10 1.7441E-11 2.7628E-08 2.9365E-11 9.3223E-10 5.1826E-09 8.0697E-08 2.1579E-14 2.9365E-11 4.8977E-13 -1.1912E-12 5.5232E-12 8.8977E-11 7.1994E-13 9.3223E-10 -1.1912E-12 4.5344E-11 1.7594E-10 2.9803E-09 4.1835E-12 5.1826E-09 5.5232E-12 1.7594E-10 9.8121E-10 1.7376E-08 1.8797E-10 8.0697E-08 8.8977E-11 2.9803E-09 1.7376E-08 8.1825E-07 # lat0 lon0 xBary yBary zBary JD0 -7.384822 165.694644 0.812254 -0.072825 -0.562587 2458495.025361 # Heliocentric elements and errors Epoch: 2458490.5000 = 2019/01/07 Mean Anomaly: 109.25992 +/- 13.796 Argument of Peri: 190.47778 +/- 11.214 Long of Asc Node: 205.79982 +/- 0.252 Inclination: 11.04627 +/- 0.055 Eccentricity: 0.18971134 +/- 0.0338 Semi-Major Axis: 46.42113081 +/- 1.0930 Time of Perihelion: 2423429.0105 +/- 4250.5 Perihelion: 37.61451565 +/- 1.8033 Aphelion: 55.22774596 +/- 2.0392 Period (y) 316.2873 +/- 11.17 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -48.48954362 +/- 0.0755 Ecliptic Y 13.19500463 +/- 0.0193 Ecliptic Z -6.43904025 +/- 0.0101 Ecliptic XDOT -0.00099848 +/- 0.0001 Ecliptic YDOT -0.00205751 +/- 0.0000 Ecliptic ZDOT 0.00027679 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 50.66364798 +/- 0.0725 Geocenter to KBO 50.09725866 +/- 0.0786 # Hcoef: 6.96
The following table shows the complete astrometric record for 19AL142. 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 (19AL142) followed by the observatory code and reference code for the source of the astrometry.
2019 01 11.52456 10 55 54.74 -01 10 19.5 23.4z 19AL142 T09 C~870S 2019 01 11.61426 10 55 54.55 -01 10 18.5 23.4z 19AL142 T09 C~870S 2019 01 11.65742 10 55 54.45 -01 10 18.5 23.3z 19AL142 T09 C~870S 2019 03 15.33262 10 52 24.13 -00 50 47.1 23.2y 19AL142 T09 C~870S 2019 03 15.37872 10 52 23.96 -00 50 46.2 23.5y 19AL142 T09 C~870S 2019 03 15.46261 10 52 23.63 -00 50 43.4 23.7y 19AL142 T09 C~870S 2019 03 15.51353 10 52 23.43 -00 50 42.2 23.5y 19AL142 T09 C~870S 2019 04 05.38960 10 51 11.46 -00 41 35.2 24.5r 19AL142 T09 C~870S 2019 04 05.42197 10 51 11.35 -00 41 34.5 24.1r 19AL142 T09 C~870S 2019 04 05.45842 10 51 11.24 -00 41 33.5 24.1r 19AL142 T09 C~870S 2019 04 05.46680 10 51 11.22 -00 41 33.2 24.2r 19AL142 T09 C~870S 2019 04 05.49907 10 51 11.12 -00 41 32.5 24.5r 19AL142 T09 C~870S 2019 04 05.50116 10 51 11.10 -00 41 32.3 24.7r 19AL142 T09 C~870S
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 -0.18
2 0.0002 -3.01 -0.03 -0.18 0.24
3 0.0004 -4.40 0.01 -0.75 -0.06
4 0.1720 -3366.75 0.07 -136.46 -0.01
5 0.1721 -3369.45 0.26 -136.61 -0.27
6 0.1723 -3375.10 -0.14 -135.94 0.22
7 0.1725 -3378.33 -0.19 -135.99 0.05
8 0.2296 -4585.70 0.02 -47.78 0.05
9 0.2297 -4587.50 -0.04 -47.77 -0.12
10 0.2298 -4589.40 -0.00 -47.49 -0.03
11 0.2298 -4589.80 0.05 -47.32 0.09
12 0.2299 -4591.45 0.11 -47.26 -0.02
13 0.2299 -4591.81 -0.13 -47.19 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.
19AL142 quality flag:1 Type: SCATEXTD11:5EEEEEE SCATEXTD axisobj 46.438 50.841 43.886 ecceobj 0.196 0.288 0.172 incobj 11.089 10.942 11.253 qmin 36.396 35.716 35.023 qmax 57.136 66.969 53.279 amean 46.510 50.931 43.951 amin 46.104 50.349 43.552 amax 47.019 51.608 44.396 emean 0.200 0.286 0.179 emin 0.185 0.275 0.159 emax 0.215 0.298 0.201 imean 11.735 11.412 12.484 imin 11.041 11.137 11.408 imax 12.356 11.824 13.626 excite_mean 0.285 0.348 0.281 fracstop 1.000 1.000 1.000 cjmean 3.031 3.034 3.006 libcent 0 -180.0 175.0 -180.0 libamp 0 -180.0 125.5 -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 183.0 180.3 183.4 kozaiamp 180.0 180.0 180.0