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: 19EH8 # Created Sun Dec 22 02:11:05 2024 # Orbit generated from Bernstein formalism # Fitting 13 observations of 13 # Arc: 112.78d # First observation: 2018/11/15 # Last observation: 2019/03/08 Preliminary a, adot, b, bdot, g, gdot: 0.000004 0.026946 0.000013 -0.011700 0.027076 0.000000 # Chi-squared of fit: 8.08 DOF: 20 RMS: 0.14 # Min/Max residuals: -0.30 0.21 # Exact a, adot, b, bdot, g, gdot: 1.611311E-05 2.596582E-02 -6.520056E-06 -1.144312E-02 2.633745E-02 -7.151814E-04 # Covariance matrix: 3.6355E-13 -3.3982E-12 1.8222E-15 -5.0440E-13 -1.9754E-13 4.5801E-11 -3.3982E-12 2.7421E-10 4.2037E-12 3.4165E-13 1.0235E-10 6.9100E-09 1.8222E-15 4.2037E-12 3.6594E-13 -1.4039E-12 1.9989E-12 1.6872E-10 -5.0440E-13 3.4165E-13 -1.4039E-12 1.1288E-11 -5.0034E-12 -7.8727E-10 -1.9754E-13 1.0235E-10 1.9989E-12 -5.0034E-12 4.6190E-11 3.7239E-09 4.5801E-11 6.9100E-09 1.6872E-10 -7.8727E-10 3.7239E-09 3.4530E-07 # lat0 lon0 xBary yBary zBary JD0 -10.816905 144.471891 0.994493 0.004450 0.022726 2458438.051841 # Heliocentric elements and errors Epoch: 2458430.5000 = 2018/11/08 Mean Anomaly: 339.03971 +/- 7.169 Argument of Peri: 232.03372 +/- 9.535 Long of Asc Node: 300.22364 +/- 0.023 Inclination: 26.32246 +/- 0.021 Eccentricity: 0.12635964 +/- 0.0094 Semi-Major Axis: 42.91337045 +/- 0.0716 Time of Perihelion: 2464408.8611 +/- 2044.8 Perihelion: 37.49085233 +/- 0.4088 Aphelion: 48.33588856 +/- 0.4120 Period (y) 281.1235 +/- 0.70 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -29.75426846 +/- 0.0078 Ecliptic Y 22.45973821 +/- 0.0056 Ecliptic Z -7.12592146 +/- 0.0018 Ecliptic XDOT -0.00131974 +/- 0.0000 Ecliptic YDOT -0.00237119 +/- 0.0000 Ecliptic ZDOT -0.00115465 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.95438168 +/- 0.0070 Geocenter to KBO 37.96875431 +/- 0.0098 # Hcoef: 8.86
The following table shows the complete astrometric record for 19EH8. 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 (19EH8) followed by the observatory code and reference code for the source of the astrometry.
2018 11 15.55104 09 32 44.43 +03 08 40.8 23.9z 19EH8 T09 C~870Y 2018 11 15.57641 09 32 44.44 +03 08 40.3 24.4z 19EH8 T09 C~870Y 2018 11 15.58818 09 32 44.46 +03 08 39.6 24.3z 19EH8 T09 C~870Y 2018 11 15.60014 09 32 44.47 +03 08 39.5 24.2z 19EH8 T09 C~870Y 2019 01 04.41923 09 31 06.68 +02 57 07.6 24.1i 19EH8 T09 C~870Y 2019 01 04.52439 09 31 06.26 +02 57 07.5 24.6i 19EH8 T09 C~870Y 2019 01 04.52706 09 31 06.25 +02 57 07.5 24.6i 19EH8 T09 C~870Y 2019 01 06.59550 09 30 57.59 +02 57 11.3 25.4g 19EH8 T09 C~8HR7 2019 01 06.61703 09 30 57.46 +02 57 11.3 25.3g 19EH8 T09 C~8HR7 2019 03 08.27081 09 25 51.55 +03 13 22.0 25.0r 19EH8 T09 C~870Y 2019 03 08.29181 09 25 51.43 +03 13 22.5 25.2r 19EH8 T09 C~870Y 2019 03 08.31288 09 25 51.34 +03 13 23.2 24.6r 19EH8 T09 C~870Y 2019 03 08.33401 09 25 51.24 +03 13 23.4 24.6r 19EH8 T09 C~870Y
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 -0.11 0.00 -0.07
2 0.0001 0.30 -0.19 -0.42 0.12
3 0.0001 0.81 0.15 -0.99 -0.15
4 0.0001 0.99 0.14 -1.04 0.10
5 0.1365 -1160.58 -0.23 -1130.26 0.08
6 0.1368 -1166.50 0.15 -1132.39 -0.03
7 0.1368 -1166.65 0.17 -1132.44 -0.03
8 0.1425 -1290.62 0.21 -1170.86 0.11
9 0.1425 -1292.46 -0.30 -1171.49 -0.12
10 0.3086 -5944.02 0.16 -1734.38 0.04
11 0.3087 -5945.89 -0.13 -1734.49 -0.07
12 0.3087 -5947.39 -0.06 -1734.26 0.16
13 0.3088 -5948.87 0.04 -1734.56 -0.13
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.
19EH8 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 42.994 43.405 42.837 ecceobj 0.124 0.129 0.132 incobj 26.269 26.206 26.330 qmin 36.833 36.794 36.458 qmax 49.376 50.234 49.512 amean 42.959 43.339 42.822 amin 42.608 42.976 42.480 amax 43.340 43.723 43.212 emean 0.124 0.133 0.129 emin 0.109 0.117 0.114 emax 0.140 0.149 0.146 imean 27.830 27.680 27.944 imin 27.431 27.295 27.532 imax 28.185 28.036 28.315 excite_mean 0.483 0.483 0.486 fracstop 1.000 1.000 1.000 cjmean 2.796 2.799 2.791 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 179.8 181.0 179.2 kozaiamp 180.0 180.0 180.0