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: 16EQ398 # Created Sun Feb 23 02:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 32.93d # First observation: 2016/02/08 # Last observation: 2016/03/12 Preliminary a, adot, b, bdot, g, gdot: 0.000001 0.031306 0.000001 -0.012666 0.026996 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 8.07 DOF: 19 RMS: 0.14 # Min/Max residuals: -0.24 0.27 # Exact a, adot, b, bdot, g, gdot: 1.507387E-05 2.294295E-02 -6.435146E-06 -1.229165E-02 2.571439E-02 1.147701E-02 # Covariance matrix: 8.3850E-13 8.7161E-10 4.7595E-15 -3.9137E-11 1.3395E-10 -5.7777E-09 8.7161E-10 1.3972E-06 7.7417E-12 -6.2049E-08 2.1302E-07 -9.6898E-06 4.7595E-15 7.7417E-12 2.8842E-13 -3.6698E-12 1.1582E-12 -6.5324E-11 -3.9137E-11 -6.2049E-08 -3.6698E-12 2.8585E-09 -9.5305E-09 3.9360E-07 1.3395E-10 2.1302E-07 1.1582E-12 -9.5305E-09 3.2617E-08 -1.4048E-06 -5.7777E-09 -9.6898E-06 -6.5324E-11 3.9360E-07 -1.4048E-06 1.0529E-04 # lat0 lon0 xBary yBary zBary JD0 -11.041119 139.364765 0.012532 -0.188393 -0.966445 2457426.923819 # Heliocentric elements and errors Epoch: 2457420.5000 = 2016/02/02 Mean Anomaly: 36.21219 +/- 24.125 Argument of Peri: 117.01076 +/- 12.399 Long of Asc Node: 300.17227 +/- 0.891 Inclination: 30.06945 +/- 1.115 Eccentricity: 0.45522583 +/- 0.3960 Semi-Major Axis: 52.31581394 +/- 21.6826 Time of Perihelion: 2443517.7669 +/- 3328.8 Perihelion: 28.50030398 +/- 23.8472 Aphelion: 76.13132390 +/- 37.7460 Period (y) 378.4057 +/- 235.25 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -29.70842906 +/- 0.2034 Ecliptic Y 25.50575486 +/- 0.1746 Ecliptic Z -7.44797967 +/- 0.0523 Ecliptic XDOT -0.00231122 +/- 0.0008 Ecliptic YDOT -0.00124288 +/- 0.0008 Ecliptic ZDOT -0.00151849 +/- 0.0002 # Distances at JD0 (AU) Heliocenter to KBO 39.85732918 +/- 0.1886 Geocenter to KBO 38.88873263 +/- 0.2731 # Hcoef: 8.34
The following table shows the complete astrometric record for 16EQ398. 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 (16EQ398) followed by the observatory code and reference code for the source of the astrometry.
2016 02 08.42303 09 13 22.22 +04 30 17.5 25.1r 16EQ398 T09 C~8eUr 2016 02 08.44625 09 13 22.12 +04 30 18.2 24.5r 16EQ398 T09 C~8eUr 2016 02 08.47058 09 13 21.99 +04 30 18.3 24.0r 16EQ398 T09 C~8eUr 2016 02 08.47270 09 13 21.99 +04 30 18.5 24.5r 16EQ398 T09 C~8eUr 2016 02 08.50190 09 13 21.81 +04 30 19.2 24.5r 16EQ398 T09 C~8eUr 2016 03 07.37297 09 11 05.50 +04 39 37.0 24.4g 16EQ398 T09 C~8eUr 2016 03 07.40429 09 11 05.35 +04 39 37.9 24.3g 16EQ398 T09 C~8eUr 2016 03 12.30861 09 10 44.79 +04 41 23.6 23.7z 16EQ398 T09 C~8eUr 2016 03 12.32109 09 10 44.72 +04 41 23.8 23.9z 16EQ398 T09 C~8eUr 2016 03 12.33491 09 10 44.67 +04 41 24.3 24.2z 16EQ398 T09 C~8eUr 2016 03 12.33760 09 10 44.67 +04 41 24.6 24.1z 16EQ398 T09 C~8eUr 2016 03 12.35149 09 10 44.61 +04 41 24.6 24.3z 16EQ398 T09 C~8eUr
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 -0.20 0.00 -0.23
2 0.0001 -1.64 0.04 0.21 0.16
3 0.0001 -3.52 0.12 -0.28 -0.15
4 0.0001 -3.58 0.23 -0.09 0.06
5 0.0002 -6.36 -0.19 -0.24 0.14
6 0.0765 -2117.80 0.08 -84.92 -0.03
7 0.0766 -2120.21 -0.15 -84.74 0.14
8 0.0900 -2445.19 0.13 -76.80 -0.09
9 0.0901 -2446.25 -0.11 -76.92 -0.24
10 0.0901 -2447.11 -0.07 -76.67 -0.01
11 0.0901 -2447.21 0.02 -76.39 0.27
12 0.0902 -2448.06 0.07 -76.66 -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.
16EQ398 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