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: 16EW391 # Created Wed Mar 26 01:10:48 2025 # Orbit generated from Bernstein formalism # Fitting 33 observations of 33 # Arc: 2.91y # First observation: 2016/02/08 # Last observation: 2019/01/06 Preliminary a, adot, b, bdot, g, gdot: -0.000378 0.022594 0.000016 0.001338 0.022120 0.000000 # Chi-squared of fit: 17.82 DOF: 60 RMS: 0.13 # Min/Max residuals: -0.24 0.39 # Exact a, adot, b, bdot, g, gdot: 1.597360E-05 2.274656E-02 1.196683E-06 1.349793E-03 2.327176E-02 2.835573E-03 # Covariance matrix: 2.3330E-13 1.1489E-12 -1.3554E-14 8.7824E-14 6.9917E-13 1.7488E-11 1.1489E-12 3.7194E-11 -2.6463E-13 2.8446E-12 1.0089E-11 4.9760E-10 -1.3554E-14 -2.6463E-13 6.8841E-14 -4.4863E-14 -8.7115E-14 -3.6143E-12 8.7824E-14 2.8446E-12 -4.4863E-14 2.4601E-13 7.6636E-13 3.8059E-11 6.9917E-13 1.0089E-11 -8.7115E-14 7.6636E-13 3.8575E-12 1.4030E-10 1.7488E-11 4.9760E-10 -3.6143E-12 3.8059E-11 1.4030E-10 6.6866E-09 # lat0 lon0 xBary yBary zBary JD0 -10.867353 140.616649 0.033785 -0.185368 -0.966522 2457426.938279 # Heliocentric elements and errors Epoch: 2457420.5000 = 2016/02/02 Mean Anomaly: 47.09232 +/- 0.294 Argument of Peri: 225.91714 +/- 0.598 Long of Asc Node: 213.03585 +/- 0.004 Inclination: 11.13044 +/- 0.000 Eccentricity: 0.14935173 +/- 0.0035 Semi-Major Axis: 48.16355209 +/- 0.0648 Time of Perihelion: 2441449.8075 +/- 94.4 Perihelion: 40.97024220 +/- 0.1791 Aphelion: 55.35686199 +/- 0.1859 Period (y) 334.2612 +/- 0.67 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -33.36049682 +/- 0.0027 Ecliptic Y 27.42445657 +/- 0.0023 Ecliptic Z -8.10145579 +/- 0.0007 Ecliptic XDOT -0.00197477 +/- 0.0000 Ecliptic YDOT -0.00184848 +/- 0.0000 Ecliptic ZDOT 0.00009307 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.93924388 +/- 0.0025 Geocenter to KBO 42.97053318 +/- 0.0036 # Hcoef: 8.15
The following table shows the complete astrometric record for 16EW391. 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 (16EW391) followed by the observatory code and reference code for the source of the astrometry.
2016 02 08.43749 09 18 16.70 +04 17 41.1 24.3r 16EW391 T09 C~8eUq 2016 02 08.44837 09 18 16.66 +04 17 41.4 24.3r 16EW391 T09 C~8eUq 2016 02 08.47270 09 18 16.53 +04 17 41.9 24.6r 16EW391 T09 C~8eUq 2016 02 08.47482 09 18 16.55 +04 17 41.9 24.3r 16EW391 T09 C~8eUq 2016 02 08.50402 09 18 16.42 +04 17 42.6 24.4r 16EW391 T09 C~8eUq 2016 02 08.51504 09 18 16.35 +04 17 42.9 24.2r 16EW391 T09 C~8eUq 2016 03 04.34374 09 16 29.89 +04 27 49.7 24.0i 16EW391 T09 C~8HEj 2016 03 04.34717 09 16 29.88 +04 27 49.9 24.3i 16EW391 T09 C~8HEj 2016 03 04.35871 09 16 29.84 +04 27 50.2 24.4i 16EW391 T09 C~8HEj 2016 03 04.36703 09 16 29.79 +04 27 50.2 24.0i 16EW391 T09 C~8HEj 2016 03 04.37528 09 16 29.76 +04 27 50.6 24.3i 16EW391 T09 C~8HEj 2016 03 04.38892 09 16 29.71 +04 27 51.1 24.1i 16EW391 T09 C~8HEj 2016 03 04.40242 09 16 29.66 +04 27 51.4 24.0i 16EW391 T09 C~8HEj 2016 03 04.41331 09 16 29.62 +04 27 51.6 24.3i 16EW391 T09 C~8HEj 2016 03 07.35383 09 16 18.32 +04 29 08.2 25.3g 16EW391 T09 C~8HEj 2016 03 07.35667 09 16 18.31 +04 29 08.3 25.2g 16EW391 T09 C~8HEj 2016 03 07.37512 09 16 18.23 +04 29 08.7 25.2g 16EW391 T09 C~8HEj 2016 03 07.40643 09 16 18.12 +04 29 09.7 25.1g 16EW391 T09 C~8HEj 2016 03 12.30861 09 16 00.22 +04 31 17.6 24.4z 16EW391 T09 C~8HEj 2016 03 12.31203 09 16 00.21 +04 31 17.6 24.0z 16EW391 T09 C~8HEj 2016 03 12.32378 09 16 00.16 +04 31 18.1 24.2z 16EW391 T09 C~8HEj 2016 03 12.35418 09 16 00.09 +04 31 18.8 24.2z 16EW391 T09 C~8HEj 2016 03 12.37925 09 15 59.97 +04 31 19.6 24.2z 16EW391 T09 C~8HEj 2018 11 15.55462 09 36 53.83 +03 14 04.7 24.1z 16EW391 T09 C~8eUq 2018 11 15.57918 09 36 53.87 +03 14 03.9 24.9z 16EW391 T09 C~8eUq 2018 11 15.59104 09 36 53.86 +03 14 03.7 24.4z 16EW391 T09 C~8eUq 2018 11 15.60290 09 36 53.88 +03 14 03.9 24.6z 16EW391 T09 C~8eUq 2018 11 15.62937 09 36 53.88 +03 14 03.4 25.0z 16EW391 T09 C~8eUq 2018 11 15.63220 09 36 53.89 +03 14 03.2 25.1z 16EW391 T09 C~8eUq 2019 01 06.47354 09 35 33.99 +03 09 47.8 25.7g 16EW391 T09 C~8eUq 2019 01 06.56358 09 35 33.65 +03 09 48.5 25.1g 16EW391 T09 C~8eUq 2019 01 06.59760 09 35 33.53 +03 09 48.6 25.1g 16EW391 T09 C~8eUq 2019 01 06.61913 09 35 33.47 +03 09 48.6 25.4g 16EW391 T09 C~8eUq
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 -0.06
2 0.0000 -0.66 0.01 0.10 0.05
3 0.0001 -2.67 -0.24 -0.02 -0.07
4 0.0001 -2.38 0.20 0.07 0.02
5 0.0002 -4.45 0.23 0.14 0.09
6 0.0002 -5.54 -0.07 0.10 0.06
7 0.0682 -1707.30 -0.02 86.93 -0.09
8 0.0682 -1707.51 -0.00 87.08 0.04
9 0.0682 -1708.17 0.09 87.18 0.06
10 0.0683 -1708.88 -0.09 86.95 -0.22
11 0.0683 -1709.43 -0.10 87.19 -0.03
12 0.0683 -1710.30 -0.08 87.44 0.13
13 0.0684 -1711.10 -0.01 87.49 0.10
14 0.0684 -1711.73 0.06 87.50 0.04
15 0.0764 -1896.10 0.05 108.38 -0.02
16 0.0764 -1896.27 0.06 108.43 0.01
17 0.0765 -1897.53 -0.04 108.44 -0.11
18 0.0766 -1899.41 0.05 108.89 0.12
19 0.0900 -2193.47 -0.09 148.24 -0.09
20 0.0900 -2193.62 -0.03 148.20 -0.17
21 0.0900 -2194.48 -0.20 148.44 -0.02
22 0.0901 -2195.69 0.39 148.79 0.07
23 0.0902 -2197.65 -0.08 149.00 0.08
24 2.7683 17117.77 -0.23 1576.07 0.06
25 2.7684 17118.60 0.25 1575.50 -0.17
26 2.7684 17118.51 0.01 1575.26 -0.24
27 2.7684 17118.74 0.07 1575.54 0.22
28 2.7685 17118.90 -0.14 1575.07 0.12
29 2.7685 17119.10 0.03 1574.92 0.02
30 2.9104 16055.65 0.15 955.33 0.25
31 2.9107 16050.56 -0.17 954.40 0.07
32 2.9108 16048.81 -0.12 953.93 -0.11
33 2.9108 16047.95 0.16 953.64 -0.21
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.
16EW391 quality flag:2 Type: 2:1E SCATNEAR SCATNEAR axisobj 48.030 48.243 47.829 ecceobj 0.152 0.162 0.142 incobj 11.135 11.135 11.136 qmin 39.404 39.366 40.530 qmax 56.857 57.343 55.685 amean 47.797 48.137 47.804 amin 47.239 47.645 47.290 amax 48.465 48.646 48.334 emean 0.144 0.163 0.078 emin 0.109 0.144 0.003 emax 0.174 0.179 0.153 imean 11.738 11.772 13.129 imin 10.909 11.270 11.609 imax 12.600 12.236 13.859 excite_mean 0.250 0.261 0.243 fracstop 1.000 1.000 1.000 cjmean 3.071 3.068 3.074 libcent 0 180.7 -180.0 -180.0 libamp 0 164.3 -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 214.8 181.9 204.2 kozaiamp 180.0 179.9 180.0