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: 16EH362 # Created Mon Jul 7 01:11:03 2025 # Orbit generated from Bernstein formalism # Fitting 24 observations of 24 # Arc: 4.22y # First observation: 2015/01/16 # Last observation: 2019/04/05 Preliminary a, adot, b, bdot, g, gdot: 0.000450 0.025615 0.000009 0.000530 0.027124 0.000000 # Chi-squared of fit: 8.94 DOF: 42 RMS: 0.11 # Min/Max residuals: -0.27 0.20 # Exact a, adot, b, bdot, g, gdot: 1.478960E-05 2.816536E-02 6.494985E-07 5.867412E-04 3.009520E-02 2.791223E-02 # Covariance matrix: 2.6464E-13 -1.7256E-13 2.4625E-15 -3.0507E-15 1.4587E-14 -1.5102E-12 -1.7256E-13 1.1275E-12 1.1678E-15 1.9542E-14 1.4145E-12 1.0863E-11 2.4625E-15 1.1678E-15 1.9921E-13 -8.1146E-14 7.4999E-15 -1.4326E-14 -3.0507E-15 1.9542E-14 -8.1146E-14 4.9989E-14 2.2402E-14 2.1113E-13 1.4587E-14 1.4145E-12 7.4999E-15 2.2402E-14 2.1699E-12 1.2884E-11 -1.5102E-12 1.0863E-11 -1.4326E-14 2.1113E-13 1.2884E-11 1.1547E-10 # lat0 lon0 xBary yBary zBary JD0 -8.464920 150.697507 0.561986 -0.118350 -0.796298 2457039.092408 # Heliocentric elements and errors Epoch: 2457030.5000 = 2015/01/08 Mean Anomaly: 15.75129 +/- 0.022 Argument of Peri: 169.71431 +/- 0.006 Long of Asc Node: 233.89061 +/- 0.003 Inclination: 8.30622 +/- 0.000 Eccentricity: 0.78040332 +/- 0.0002 Semi-Major Axis: 68.23215282 +/- 0.0612 Time of Perihelion: 2448023.1781 +/- 2.4 Perihelion: 14.98355420 +/- 0.0210 Aphelion: 121.48075144 +/- 0.1101 Period (y) 563.6270 +/- 0.76 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -29.09079053 +/- 0.0014 Ecliptic Y 16.96967930 +/- 0.0008 Ecliptic Z -4.89127092 +/- 0.0002 Ecliptic XDOT -0.00345500 +/- 0.0000 Ecliptic YDOT -0.00100670 +/- 0.0000 Ecliptic ZDOT -0.00032090 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 34.03187683 +/- 0.0013 Geocenter to KBO 33.22789419 +/- 0.0016 # Hcoef: 9.36
The following table shows the complete astrometric record for 16EH362. 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 (16EH362) followed by the observatory code and reference code for the source of the astrometry.
2015 01 16.59163 09 59 03.88 +03 17 47.3 24.2z 16EH362 T09 C~8vHY 2015 01 16.62595 09 59 03.71 +03 17 47.9 24.3z 16EH362 T09 C~8vHY 2015 01 16.64412 09 59 03.62 +03 17 48.4 24.3z 16EH362 T09 C~8vHY 2015 01 16.65856 09 59 03.55 +03 17 48.6 24.1z 16EH362 T09 C~8vHY 2015 01 21.602673 09 58 39.19 +03 19 20.3 16EH362 T09 C~86tJ 2016 03 04.426185 10 00 46.11 +03 08 11.9 16EH362 T09 C~86tJ 2016 03 07.28113 10 00 30.91 +03 09 48.7 26.2g 16EH362 T09 C~89T1 2016 03 07.28866 10 00 30.87 +03 09 48.9 25.6g 16EH362 T09 C~89T1 2016 03 07.29878 10 00 30.81 +03 09 49.0 26.3g 16EH362 T09 C~89T1 2016 03 09.299522 10 00 20.35 +03 10 57.2 16EH362 T09 C~86tK 2017 03 04.31448 10 06 33.90 +02 37 53.4 24.0z 16EH362 T09 C~86tK 2017 03 04.34002 10 06 33.75 +02 37 54.4 24.1z 16EH362 T09 C~86tK 2017 03 04.47432 10 06 33.02 +02 37 58.6 24.5i 16EH362 T09 C~86tK 2017 03 04.49602 10 06 32.91 +02 37 59.5 24.6i 16EH362 T09 C~86tK 2017 03 06.529560 10 06 22.21 +02 39 07.1 16EH362 T09 C~86tK 2017 03 22.38749 10 05 04.70 +02 47 59.7 25.2z 16EH362 T09 C~86tK 2017 03 22.41317 10 05 04.57 +02 48 00.5 24.9z 16EH362 T09 C~86tK 2017 03 22.43886 10 05 04.44 +02 48 01.4 24.5z 16EH362 T09 C~86tK 2017 03 22.48627 10 05 04.24 +02 48 02.9 24.4z 16EH362 T09 C~86tK 2017 03 29.289242 10 04 35.37 +02 51 45.4 16EH362 T09 C~86tK 2017 03 29.303176 10 04 35.30 +02 51 45.5 16EH362 T09 C~86tK 2018 01 17.494013 10 15 56.07 +01 49 17.2 16EH362 T09 C~86tK 2019 04 05.337293 10 14 52.02 +01 58 50.2 16EH362 T09 C~86tK 2019 04 05.378076 10 14 51.87 +01 58 51.5 16EH362 T09 C~86tK
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 0.00 0.00 -0.07
2 0.0001 -2.60 -0.05 -0.32 -0.07
3 0.0001 -4.03 -0.14 -0.32 0.10
4 0.0002 -5.09 -0.12 -0.50 0.06
5 0.0137 -379.01 0.20 -41.24 0.09
6 1.1303 1635.61 0.18 -7.24 0.11
7 1.1381 1388.48 -0.02 4.33 0.12
8 1.1381 1387.85 0.00 4.31 0.07
9 1.1381 1386.97 0.01 4.09 -0.19
10 1.1436 1216.37 0.04 13.56 -0.04
11 2.1293 7155.78 0.11 103.85 0.05
12 2.1294 7153.32 -0.11 104.00 0.12
13 2.1297 7141.59 -0.10 104.12 -0.16
14 2.1298 7139.73 -0.07 104.39 0.04
15 2.1354 6965.69 0.08 111.78 -0.20
16 2.1788 5690.31 0.09 205.77 0.06
17 2.1788 5688.20 -0.07 205.84 -0.05
18 2.1789 5686.06 -0.27 206.01 -0.08
19 2.1790 5682.73 -0.02 206.37 -0.06
20 2.1977 5199.43 0.12 264.09 0.16
21 2.1977 5198.41 0.06 263.81 -0.23
22 3.0032 16099.37 0.10 320.30 0.05
23 4.2156 14992.99 -0.01 520.90 0.04
24 4.2157 14990.41 -0.03 521.33 0.09
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.
16EH362 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 68.952 69.061 68.843 ecceobj 0.784 0.784 0.784 incobj 8.298 8.298 8.298 qmin 14.451 14.551 14.470 qmax 124.133 123.219 127.349 amean 66.140 65.125 64.711 amin 63.622 61.521 57.751 amax 69.480 69.061 71.105 emean 0.775 0.766 0.768 emin 0.762 0.744 0.736 emax 0.787 0.784 0.791 imean 9.774 10.879 10.706 imin 8.941 8.932 8.934 imax 11.634 13.847 13.998 excite_mean 0.793 0.790 0.791 fracstop 0.041 0.066 0.057 cjmean 2.305 2.320 2.310 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 208.0 225.0 222.4 kozaiamp 35.7 47.5 48.3