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: 16FG186 # Created Tue Apr 1 01:10:46 2025 # Orbit generated from Bernstein formalism # Fitting 19 observations of 19 # Arc: 108.75d # First observation: 2016/03/16 # Last observation: 2016/07/03 Preliminary a, adot, b, bdot, g, gdot: -0.000006 0.032080 -0.000018 -0.000761 0.025514 0.000000 # Chi-squared of fit: 5.52 DOF: 32 RMS: 0.10 # Min/Max residuals: -0.18 0.30 # Exact a, adot, b, bdot, g, gdot: 1.561007E-05 2.512763E-02 -1.152156E-06 -1.167640E-03 2.441266E-02 5.038428E-03 # Covariance matrix: 2.9476E-13 8.3618E-13 -3.2956E-15 9.1401E-14 4.3725E-13 1.2233E-11 8.3618E-13 2.4020E-09 -6.1675E-12 1.5737E-10 2.2729E-10 -4.4643E-08 -3.2956E-15 -6.1675E-12 2.9212E-13 -1.5322E-12 -5.5944E-13 1.1992E-10 9.1401E-14 1.5737E-10 -1.5322E-12 1.6796E-11 1.4382E-11 -3.0390E-09 4.3725E-13 2.2729E-10 -5.5944E-13 1.4382E-11 2.5259E-11 -3.5190E-09 1.2233E-11 -4.4643E-08 1.1992E-10 -3.0390E-09 -3.5190E-09 9.7092E-07 # lat0 lon0 xBary yBary zBary JD0 10.409753 -153.216626 0.507044 0.154047 -0.837782 2457464.033439 # Heliocentric elements and errors Epoch: 2457460.5000 = 2016/03/13 Mean Anomaly: 35.73368 +/- 2.406 Argument of Peri: 45.77059 +/- 5.792 Long of Asc Node: 102.26380 +/- 0.039 Inclination: 10.49406 +/- 0.002 Eccentricity: 0.25280692 +/- 0.0360 Semi-Major Axis: 50.67516720 +/- 0.8826 Time of Perihelion: 2444381.7430 +/- 811.6 Perihelion: 37.86413423 +/- 1.9390 Aphelion: 63.48620017 +/- 2.1324 Period (y) 360.7456 +/- 9.42 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.95830644 +/- 0.0074 Ecliptic Y -18.08828664 +/- 0.0037 Ecliptic Z 7.40132679 +/- 0.0015 Ecliptic XDOT 0.00075256 +/- 0.0001 Ecliptic YDOT -0.00278378 +/- 0.0000 Ecliptic ZDOT -0.00002669 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.80768072 +/- 0.0067 Geocenter to KBO 40.96235154 +/- 0.0084 # Hcoef: 7.75
The following table shows the complete astrometric record for 16FG186. 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 (16FG186) followed by the observatory code and reference code for the source of the astrometry.
2016 03 16.53265 13 54 21.45 -00 36 09.7 22.8z 16FG186 T09 C~89TQ 2016 03 16.60979 13 54 21.15 -00 36 07.6 23.4z 16FG186 T09 C~89TQ 2016 03 16.62402 13 54 21.11 -00 36 07.2 23.6z 16FG186 T09 C~89TQ 2016 03 16.63481 13 54 21.06 -00 36 06.9 23.3z 16FG186 T09 C~89TQ 2016 03 16.63751 13 54 21.06 -00 36 06.6 23.4z 16FG186 T09 C~89TQ 2016 06 01.38643 13 49 05.54 -00 09 09.8 24.2z 16FG186 T09 C~89TQ 2016 06 01.39450 13 49 05.51 -00 09 09.7 23.7z 16FG186 T09 C~89TQ 2016 06 01.40260 13 49 05.48 -00 09 09.5 23.6z 16FG186 T09 C~89TQ 2016 06 01.41069 13 49 05.45 -00 09 09.5 23.6z 16FG186 T09 C~89TQ 2016 06 06.33364 13 48 50.88 -00 08 48.0 24.8g 16FG186 T09 C~89TQ 2016 06 06.35147 13 48 50.86 -00 08 48.0 24.8g 16FG186 T09 C~89TQ 2016 06 06.36638 13 48 50.80 -00 08 48.0 25.0g 16FG186 T09 C~89TQ 2016 06 06.36850 13 48 50.79 -00 08 48.0 24.9g 16FG186 T09 C~89TQ 2016 06 06.38128 13 48 50.76 -00 08 47.8 24.8g 16FG186 T09 C~89TQ 2016 06 06.38554 13 48 50.74 -00 08 48.0 24.7g 16FG186 T09 C~89TQ 2016 07 03.26431 13 48 02.51 -00 10 49.6 24.0r 16FG186 T09 C~89TQ 2016 07 03.27787 13 48 02.50 -00 10 49.8 24.0r 16FG186 T09 C~89TQ 2016 07 03.28434 13 48 02.49 -00 10 49.9 24.1r 16FG186 T09 C~89TQ 2016 07 03.28650 13 48 02.49 -00 10 49.9 24.2r 16FG186 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 0.08
2 0.0002 -4.95 -0.10 0.37 -0.10
3 0.0003 -5.66 0.07 0.53 -0.04
4 0.0003 -6.46 -0.08 0.54 -0.11
5 0.0003 -6.57 -0.02 0.82 0.15
6 0.2104 -5005.91 0.06 -168.93 -0.02
7 0.2104 -5006.36 -0.02 -169.00 0.00
8 0.2105 -5006.86 -0.14 -168.97 0.13
9 0.2105 -5007.28 -0.18 -169.13 0.06
10 0.2240 -5219.34 -0.16 -226.70 -0.04
11 0.2240 -5219.62 0.30 -226.80 0.08
12 0.2240 -5220.46 0.07 -227.12 -0.05
13 0.2241 -5220.60 0.02 -227.18 -0.08
14 0.2241 -5221.09 0.06 -227.15 0.11
15 0.2241 -5221.30 0.03 -227.44 -0.13
16 0.2977 -5854.82 -0.00 -598.29 0.03
17 0.2977 -5854.89 0.02 -598.53 0.00
18 0.2977 -5854.99 -0.04 -598.68 -0.05
19 0.2978 -5854.99 -0.02 -598.68 -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.
16FG186 quality flag:1 Type: SCATNEAR SCATNEAR CLASSICAL axisobj 49.963 53.412 48.168 ecceobj 0.245 0.349 0.155 incobj 10.493 10.495 10.492 qmin 37.013 33.973 40.138 qmax 64.121 75.791 57.272 amean 50.296 54.004 48.496 amin 49.822 53.099 48.039 amax 50.863 55.212 48.969 emean 0.248 0.352 0.157 emin 0.236 0.332 0.144 emax 0.262 0.373 0.170 imean 8.954 8.777 8.926 imin 8.439 7.525 8.611 imax 9.557 10.047 9.307 excite_mean 0.293 0.384 0.221 fracstop 1.000 1.000 1.000 cjmean 3.072 3.035 3.097 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 179.1 172.1 182.2 kozaiamp 179.9 180.0 180.0