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: 16EU402 # Created Sun Oct 19 01:11:25 2025 # Orbit generated from Bernstein formalism # Fitting 17 observations of 17 # Arc: 25.99d # First observation: 2016/03/09 # Last observation: 2016/04/04 Preliminary a, adot, b, bdot, g, gdot: 0.000001 0.030568 -0.000003 -0.005748 0.026965 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 9.09 DOF: 29 RMS: 0.13 # Min/Max residuals: -0.25 0.36 # Exact a, adot, b, bdot, g, gdot: 1.742371E-05 2.829238E-02 -3.342892E-06 -5.243735E-03 2.634712E-02 4.814484E-03 # Covariance matrix: 3.8469E-13 -3.3685E-11 -5.4132E-14 7.9012E-12 4.2769E-13 4.3061E-09 -3.3685E-11 2.5507E-07 -2.3347E-10 -5.7672E-08 5.9107E-08 4.6226E-06 -5.4132E-14 -2.3347E-10 4.0454E-13 4.9697E-11 -5.6956E-11 -6.0486E-09 7.9012E-12 -5.7672E-08 4.9697E-11 1.3153E-08 -1.3338E-08 -1.0256E-06 4.2769E-13 5.9107E-08 -5.6956E-11 -1.3338E-08 1.3963E-08 1.2389E-06 4.3061E-09 4.6226E-06 -6.0486E-09 -1.0256E-06 1.2389E-06 1.9100E-04 # lat0 lon0 xBary yBary zBary JD0 16.663903 -138.839935 0.780460 0.174673 -0.583071 2457457.128309 # Heliocentric elements and errors Epoch: 2457450.5000 = 2016/03/03 Mean Anomaly: 27.24009 +/- 42.153 Argument of Peri: 75.89716 +/- 86.645 Long of Asc Node: 97.73116 +/- 0.528 Inclination: 19.18095 +/- 0.105 Eccentricity: 0.24830103 +/- 0.4244 Semi-Major Axis: 48.31326228 +/- 12.2706 Time of Perihelion: 2448169.3018 +/- 13920.1 Perihelion: 36.31702929 +/- 22.4813 Aphelion: 60.30949527 +/- 25.5920 Period (y) 335.8209 +/- 127.94 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -28.35040700 +/- 0.1228 Ecliptic Y -23.74684332 +/- 0.1073 Ecliptic Z 10.88371103 +/- 0.0488 Ecliptic XDOT 0.00145640 +/- 0.0010 Ecliptic YDOT -0.00263871 +/- 0.0009 Ecliptic ZDOT -0.00037854 +/- 0.0004 # Distances at JD0 (AU) Heliocenter to KBO 38.55014022 +/- 0.1128 Geocenter to KBO 37.95480746 +/- 0.1702 # Hcoef: 7.49
The following table shows the complete astrometric record for 16EU402. 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 (16EU402) followed by the observatory code and reference code for the source of the astrometry.
2016 03 09.62752 14 55 20.94 +00 42 14.3 23.4r 16EU402 T09 C~94sV 2016 03 09.65573 14 55 20.87 +00 42 15.2 23.6r 16EU402 T09 C~94sV 2016 03 12.54530 14 55 14.05 +00 43 42.0 23.1z 16EU402 T09 C~94sV 2016 03 12.57306 14 55 13.97 +00 43 42.9 23.5z 16EU402 T09 C~94sV 2016 03 12.59741 14 55 13.93 +00 43 43.7 23.2z 16EU402 T09 C~94sV 2016 03 12.61090 14 55 13.87 +00 43 44.0 22.9z 16EU402 T09 C~94sV 2016 03 12.61360 14 55 13.90 +00 43 44.2 23.2z 16EU402 T09 C~94sV 2016 03 12.62712 14 55 13.85 +00 43 44.4 22.8z 16EU402 T09 C~94sV 2016 03 12.63253 14 55 13.83 +00 43 44.7 22.8z 16EU402 T09 C~94sV 2016 03 15.55566 14 55 06.16 +00 45 13.6 24.1y 16EU402 T09 C~94sV 2016 03 15.60777 14 55 06.00 +00 45 15.3 23.1y 16EU402 T09 C~94sV 2016 03 15.63741 14 55 05.93 +00 45 16.3 23.0y 16EU402 T09 C~94sW 2016 04 04.57957 14 53 56.39 +00 55 19.9 23.8g 16EU402 T09 C~94sW 2016 04 04.59302 14 53 56.34 +00 55 20.4 23.9g 16EU402 T09 C~94sW 2016 04 04.60590 14 53 56.28 +00 55 20.5 23.8g 16EU402 T09 C~94sW 2016 04 04.60802 14 53 56.27 +00 55 20.7 23.8g 16EU402 T09 C~94sW 2016 04 04.61860 14 53 56.24 +00 55 21.0 23.7g 16EU402 T09 C~94sW
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 -0.09 0.00 0.04
2 0.0001 -1.27 -0.17 0.54 0.07
3 0.0080 -124.86 0.02 52.72 -0.11
4 0.0081 -126.28 -0.12 53.22 -0.09
5 0.0081 -127.09 0.19 53.81 0.07
6 0.0082 -128.04 -0.13 53.82 -0.15
7 0.0082 -127.67 0.36 54.15 0.13
8 0.0082 -128.44 0.21 54.12 -0.13
9 0.0082 -128.82 0.08 54.31 -0.03
10 0.0162 -265.21 -0.04 104.68 -0.02
11 0.0164 -268.00 -0.25 105.58 0.03
12 0.0165 -269.31 -0.08 106.22 0.19
13 0.0711 -1445.21 -0.07 369.80 0.00
14 0.0711 -1446.07 -0.00 370.06 0.14
15 0.0711 -1446.96 -0.00 369.88 -0.15
16 0.0711 -1447.16 -0.06 370.03 -0.03
17 0.0712 -1447.68 0.15 370.18 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.
16EU402 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