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: 16FF186 # Created Tue Apr 1 01:10:46 2025 # Orbit generated from Bernstein formalism # Fitting 17 observations of 17 # Arc: 81.87d # First observation: 2016/03/16 # Last observation: 2016/06/06 Preliminary a, adot, b, bdot, g, gdot: -0.000033 0.037476 -0.000014 -0.000463 0.028823 0.000000 # Chi-squared of fit: 12.85 DOF: 28 RMS: 0.15 # Min/Max residuals: -0.25 0.42 # Exact a, adot, b, bdot, g, gdot: 1.758985E-05 3.242783E-02 -8.536195E-07 -6.350370E-04 2.804206E-02 -2.331383E-03 # Covariance matrix: 2.9452E-13 1.9599E-12 -1.3587E-14 8.3808E-14 1.1390E-12 1.1338E-10 1.9599E-12 7.7900E-09 -2.4639E-11 2.7466E-10 1.2637E-09 -2.1006E-08 -1.3587E-14 -2.4639E-11 2.9226E-13 -1.9796E-12 -4.0329E-12 6.0592E-11 8.3808E-14 2.7466E-10 -1.9796E-12 1.9379E-11 4.4411E-11 -7.7931E-10 1.1390E-12 1.2637E-09 -4.0329E-12 4.4411E-11 2.1041E-10 -2.4289E-09 1.1338E-10 -2.1006E-08 6.0592E-11 -7.7931E-10 -2.4289E-09 2.4350E-07 # lat0 lon0 xBary yBary zBary JD0 11.620934 -152.327885 0.520442 0.170087 -0.826383 2457464.016809 # Heliocentric elements and errors Epoch: 2457460.5000 = 2016/03/13 Mean Anomaly: 346.37342 +/- 1.970 Argument of Peri: 118.69166 +/- 3.636 Long of Asc Node: 111.83313 +/- 0.047 Inclination: 11.39391 +/- 0.001 Eccentricity: 0.26099209 +/- 0.0103 Semi-Major Axis: 48.51627502 +/- 0.4099 Time of Perihelion: 2462132.6206 +/- 672.8 Perihelion: 35.85391079 +/- 0.5825 Aphelion: 61.17863925 +/- 0.7174 Period (y) 337.9398 +/- 4.28 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -31.92684756 +/- 0.0160 Ecliptic Y -16.15515307 +/- 0.0084 Ecliptic Z 7.18334046 +/- 0.0037 Ecliptic XDOT 0.00165669 +/- 0.0000 Ecliptic YDOT -0.00271315 +/- 0.0000 Ecliptic ZDOT -0.00010657 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.49538253 +/- 0.0145 Geocenter to KBO 35.66071615 +/- 0.0184 # Hcoef: 9.09
The following table shows the complete astrometric record for 16FF186. 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 (16FF186) followed by the observatory code and reference code for the source of the astrometry.
2016 03 16.51602 13 59 20.10 +00 13 17.9 24.6z 16FF186 T09 C~89TQ 2016 03 16.54079 13 59 20.00 +00 13 18.6 24.3z 16FF186 T09 C~89TQ 2016 03 16.54349 13 59 19.96 +00 13 18.7 24.7z 16FF186 T09 C~89TQ 2016 03 16.57637 13 59 19.85 +00 13 20.1 24.3z 16FF186 T09 C~89TQ 2016 03 16.59799 13 59 19.76 +00 13 20.4 24.1z 16FF186 T09 C~89TQ 2016 04 15.47656 13 57 02.35 +00 29 17.3 24.3y 16FF186 T09 C~89TQ 2016 04 15.48536 13 57 02.30 +00 29 17.6 23.4y 16FF186 T09 C~89TQ 2016 04 15.50154 13 57 02.24 +00 29 18.5 23.4y 16FF186 T09 C~89TQ 2016 04 15.53131 13 57 02.08 +00 29 19.0 24.0y 16FF186 T09 C~89TQ 2016 04 15.54480 13 57 02.01 +00 29 19.1 23.8y 16FF186 T09 C~89TQ 2016 06 05.37292 13 53 12.45 +00 44 04.6 25.2r 16FF186 T09 C~89TQ 2016 06 05.38217 13 53 12.41 +00 44 04.6 25.2r 16FF186 T09 C~89TQ 2016 06 05.40134 13 53 12.34 +00 44 04.9 25.2r 16FF186 T09 C~89TQ 2016 06 05.41197 13 53 12.30 +00 44 04.9 25.5r 16FF186 T09 C~89TQ 2016 06 06.34225 13 53 09.31 +00 44 07.3 25.8g 16FF186 T09 C~89TQ 2016 06 06.37484 13 53 09.21 +00 44 06.9 25.5g 16FF186 T09 C~89TQ 2016 06 06.38765 13 53 09.18 +00 44 07.1 25.8g 16FF186 T09 C~89TQ
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 0.14 0.00 0.10
2 0.0001 -1.65 0.16 0.13 -0.02
3 0.0001 -2.25 -0.25 0.01 -0.16
4 0.0002 -4.28 -0.07 0.74 0.24
5 0.0002 -5.65 0.02 0.54 -0.17
6 0.0820 -2271.82 -0.07 170.08 -0.12
7 0.0821 -2272.63 -0.15 170.09 -0.10
8 0.0821 -2273.79 0.02 170.62 0.42
9 0.0822 -2276.21 0.05 170.24 0.04
10 0.0822 -2277.23 0.14 169.97 -0.24
11 0.2214 -5813.14 0.20 -213.88 -0.03
12 0.2214 -5813.71 0.08 -214.09 -0.10
13 0.2215 -5814.79 -0.09 -214.18 0.10
14 0.2215 -5815.36 -0.14 -214.39 0.05
15 0.2240 -5858.21 -0.23 -227.94 0.18
16 0.2241 -5859.47 0.03 -228.84 -0.22
17 0.2242 -5859.97 0.14 -228.82 0.01
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.
16FF186 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 47.792 48.880 46.833 ecceobj 0.251 0.275 0.229 incobj 11.393 11.392 11.395 qmin 34.893 34.992 35.734 qmax 62.103 64.370 59.425 amean 47.948 49.194 47.193 amin 46.970 48.585 46.743 amax 48.794 49.939 47.813 emean 0.247 0.271 0.221 emin 0.223 0.256 0.202 emax 0.273 0.289 0.244 imean 10.294 9.780 9.590 imin 9.190 9.047 8.522 imax 11.779 10.647 10.602 excite_mean 0.305 0.320 0.277 fracstop 1.000 1.000 1.000 cjmean 3.034 3.037 3.046 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 186.9 181.1 180.5 kozaiamp 179.9 180.0 180.0