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: 16FX185
# Created Tue Jun 17 01:10:55 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 19 observations of 23
# Arc: 5.15y
# First observation: 2012/01/26
# Last observation: 2017/03/23
# Chi-squared of fit: 236.18 DOF: 32 RMS: 0.62
# Min/Max residuals: -1.25 1.88
# Exact a, adot, b, bdot, g, gdot:
1.360573E-05 1.754887E-02 -1.502001E-05 5.021513E-04 1.934520E-02 -8.341647E-03
# Covariance matrix:
2.9838E-11 -9.0822E-12 1.3326E-12 -3.6678E-13 -2.4946E-12 -2.7016E-11
-9.0822E-12 2.7914E-12 -4.1848E-13 1.1255E-13 8.5141E-13 8.3102E-12
1.3326E-12 -4.1848E-13 3.1766E-13 -4.8370E-14 -1.6702E-13 -1.2453E-12
-3.6678E-13 1.1255E-13 -4.8370E-14 9.8995E-15 3.2697E-14 3.3583E-13
-2.4946E-12 8.5141E-13 -1.6702E-13 3.2697E-14 6.5561E-13 2.5098E-12
-2.7016E-11 8.3102E-12 -1.2453E-12 3.3583E-13 2.5098E-12 2.4790E-11
# lat0 lon0 xBary yBary zBary JD0
9.786618 -155.502157 0.965088 0.033747 -0.195603 2455953.157782
# Heliocentric elements and errors
Epoch: 2455952.5000 = 2012/01/26
Mean Anomaly: 331.43160 +/- 0.016
Argument of Peri: 163.25485 +/- 0.021
Long of Asc Node: 124.02452 +/- 0.001
Inclination: 9.91357 +/- 0.000
Eccentricity: 0.53056001 +/- 0.0003
Semi-Major Axis: 76.42447372 +/- 0.0282
Time of Perihelion: 2475318.0785 +/- 124.9
Perihelion: 35.87670450 +/- 0.0249
Aphelion: 116.97224294 +/- 0.0480
Period (y) 668.1237 +/- 0.37
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -46.93186434 +/- 0.0019
Ecliptic Y -20.32613668 +/- 0.0010
Ecliptic Z 8.78587037 +/- 0.0004
Ecliptic XDOT 0.00209501 +/- 0.0000
Ecliptic YDOT -0.00176819 +/- 0.0000
Ecliptic ZDOT -0.00013055 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 51.89394066 +/- 0.0017
Geocenter to KBO 51.69277561 +/- 0.0022
# Hcoef: 6.28
The following table shows the complete astrometric record for 16FX185. 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 (16FX185) followed by the observatory code and reference code for the source of the astrometry.
2012 01 26.657016 13 45 03.69 -00 22 39.0 16FX185 T14 C~8Djz 2012 01 26.659834 13 45 03.70 -00 22 39.0 16FX185 T14 C~8Djz 2012 01 26.662575 13 45 03.69 -00 22 39.0 16FX185 T14 C~8Djz 2016 03 07.58831 13 59 59.99 -01 34 08.8 23.3g 16FX185 T09 C~89TP 2016 03 07.62208 13 59 59.92 -01 34 08.0 23.9g 16FX185 T09 C~89TP 2016 03 07.63555 13 59 59.88 -01 34 07.6 24.1g 16FX185 T09 C~89TP 2016 03 16.45267 13 59 35.84 -01 30 38.9 22.8z 16FX185 T09 C~89TP 2016 03 16.45608 13 59 35.84 -01 30 38.9 23.0z 16FX185 T09 C~89TP 2016 03 16.48283 13 59 35.76 -01 30 38.0 22.8z 16FX185 T09 C~89TP 2016 03 16.53534 13 59 35.59 -01 30 37.0 23.4z 16FX185 T09 C~89TP 2016 03 16.55995 13 59 35.54 -01 30 36.5 23.4z 16FX185 T09 C~89TP 2016 03 16.58177 13 59 35.46 -01 30 35.8 23.4z 16FX185 T09 C~89TP 2016 04 15.46627 13 57 51.61 -01 18 42.1 22.3y 16FX185 T09 C~89TP 2016 04 15.49615 13 57 51.49 -01 18 41.6 22.8y 16FX185 T09 C~89TP 2016 04 15.52858 13 57 51.37 -01 18 40.7 22.9y 16FX185 T09 C~89TP 2016 04 15.53670 13 57 51.34 -01 18 40.4 23.4y 16FX185 T09 C~89TP 2016 06 08.254890 13 54 49.58 -01 05 54.8 16FX185 T09 C~8COS 2016 06 08.362536 13 54 49.31 -01 05 54.5 16FX185 T09 C~8COS 2017 03 23.345591 14 03 25.46 -01 50 01.3 16FX185 W84 C~8Djz 2017 03 26.337226 14 03 15.64 -01 48 48.4 16FX185 W84 C~8Djz 2025 04 23.377100 14 37 43.154 -04 46 18.61 22.8G 16FX185 G37 C~8svQ 2025 04 23.412770 14 37 43.009 -04 46 17.95 16FX185 G37 C~8svQ 2025 04 23.456250 14 37 42.825 -04 46 16.87 16FX185 G37 C~8svQ
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 ( 1.29) 0.00 ( 2.91)
2 0.0000 0.00 ( 1.44) 0.00 ( 2.88)
3 0.0000 0.00 ( 1.29) 0.00 ( 2.84)
4 4.1121 0.00 -0.70 0.00 -0.54
5 4.1122 0.00 -0.45 0.00 -0.53
6 4.1122 0.00 -0.54 0.00 -0.44
7 4.1363 0.00 -0.69 0.00 -0.51
8 4.1363 0.00 -0.54 0.00 -0.59
9 4.1364 0.00 -0.53 0.00 -0.34
10 4.1366 0.00 -0.70 0.00 -0.60
11 4.1366 0.00 -0.33 0.00 -0.70
12 4.1367 0.00 -0.54 0.00 -0.52
13 4.2185 0.00 -0.55 0.00 -0.45
14 4.2186 0.00 -0.62 0.00 -0.62
15 4.2187 0.00 -0.54 0.00 -0.45
16 4.2187 0.00 -0.52 0.00 -0.33
17 4.3658 0.00 -0.36 0.00 -0.56
18 4.3661 0.00 -0.45 0.00 -0.65
19 5.1545 0.00 ( 1.96) 0.00 ( -1.26)
20 5.1627 0.00 1.88 0.00 -1.25
21 13.2395 0.00 0.28 0.00 1.10
22 13.2396 0.00 0.34 0.00 0.99
23 13.2397 0.00 0.29 0.00 1.13
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.
16FX185 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 76.152 76.151 76.153 ecceobj 0.530 0.530 0.530 incobj 9.915 9.915 9.915 qmin 35.132 34.952 35.093 qmax 124.349 126.138 123.158 amean 77.868 77.976 77.065 amin 75.844 75.546 75.568 amax 80.181 80.962 79.606 emean 0.537 0.540 0.533 emin 0.523 0.523 0.520 emax 0.551 0.558 0.547 imean 8.229 7.841 8.141 imin 7.480 7.068 7.517 imax 8.745 8.558 8.904 excite_mean 0.556 0.557 0.551 fracstop 1.000 1.000 1.000 cjmean 3.071 3.071 3.071 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 195.6 190.3 190.3 kozaiamp 180.0 180.0 180.0