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: 16GJ365
# Created Mon Apr 28 01:10:48 2025
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 18
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000031 0.020720 0.000000 -0.000374 0.022305 0.000000
# Chi-squared of fit: 2.55 DOF: 30 RMS: 0.07
# Min/Max residuals: -0.12 0.13
# Exact a, adot, b, bdot, g, gdot:
1.425418E-05 2.071401E-02 -2.897947E-07 -3.749933E-04 2.263624E-02 -2.799398E-04
# Covariance matrix:
2.5675E-13 3.8107E-12 1.2590E-14 -7.9544E-14 1.6704E-12 1.5832E-10
3.8107E-12 4.2798E-10 1.1318E-12 -8.1466E-12 1.4992E-10 1.5911E-08
1.2590E-14 1.1318E-12 1.5141E-13 -2.2204E-13 4.0436E-13 4.2388E-11
-7.9544E-14 -8.1466E-12 -2.2204E-13 7.6708E-13 -2.8693E-12 -3.0370E-10
1.6704E-12 1.4992E-10 4.0436E-13 -2.8693E-12 5.3570E-11 5.6150E-09
1.5832E-10 1.5911E-08 4.2388E-11 -3.0370E-10 5.6150E-09 5.9353E-07
# lat0 lon0 xBary yBary zBary JD0
1.964174 -175.596588 -0.145422 0.033896 -0.984361 2457480.915394
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 196.05541 +/- 52.440
Argument of Peri: 283.52693 +/- 52.439
Long of Asc Node: 66.12699 +/- 0.059
Inclination: 2.18512 +/- 0.001
Eccentricity: 0.03750077 +/- 0.0099
Semi-Major Axis: 43.59014394 +/- 0.0149
Time of Perihelion: 2505351.8287 +/- 15312.4
Perihelion: 41.95547983 +/- 0.4334
Aphelion: 45.22480805 +/- 0.4335
Period (y) 287.7999 +/- 0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.99526119 +/- 0.0142
Ecliptic Y -3.61313150 +/- 0.0011
Ecliptic Z 1.51415919 +/- 0.0005
Ecliptic XDOT 0.00022465 +/- 0.0001
Ecliptic YDOT -0.00250246 +/- 0.0000
Ecliptic ZDOT -0.00004648 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.16548380 +/- 0.0142
Geocenter to KBO 44.17694850 +/- 0.0143
# Hcoef: 8.18
The following table shows the complete astrometric record for 16GJ365. 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 (16GJ365) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.414605 12 19 16.93 +00 03 10.5 24.1i 16GJ365 T09 C~81Ay 2016 04 02.441875 12 19 16.81 +00 03 11.3 24.2i 16GJ365 T09 C~81Ay 2016 04 02.523267 12 19 16.46 +00 03 13.4 16GJ365 T09 C~81Ay 2016 04 04.345971 12 19 08.90 +00 04 01.4 16GJ365 T09 C~81Ay 2016 04 04.387256 12 19 08.73 +00 04 02.4 16GJ365 T09 C~81Ay 2016 04 04.419468 12 19 08.58 +00 04 03.2 16GJ365 T09 C~81Ay 2016 04 08.511551 12 18 51.74 +00 05 48.8 24.3r 16GJ365 T09 C~81Ay 2016 06 04.251947 12 16 12.28 +00 21 03.9 16GJ365 T09 C~81Ay 2016 06 04.270359 12 16 12.26 +00 21 03.9 23.8z 16GJ365 T09 C~81Ay 2016 06 04.327060 12 16 12.20 +00 21 04.2 16GJ365 T09 C~81Ay 2016 06 05.339160 12 16 11.22 +00 21 07.6 16GJ365 T09 C~81Ay 2016 06 05.356114 12 16 11.20 +00 21 07.7 24.1r 16GJ365 T09 C~81Ay 2017 01 23.60759 12 27 27.75 -00 52 24.5 24.9i 16GJ365 T09 C~81Az 2017 01 23.61026 12 27 27.76 -00 52 24.5 25.0i 16GJ365 T09 C~81Az 2017 01 23.62095 12 27 27.73 -00 52 24.5 25.2i 16GJ365 T09 C~81Az 2017 01 23.64653 12 27 27.70 -00 52 24.2 25.4i 16GJ365 T09 C~81Az 2017 02 23.521659 12 26 09.74 -00 43 01.6 16GJ365 T09 C~81Az 2017 02 23.595374 12 26 09.49 -00 42 59.8 16GJ365 T09 C~81Az
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 0.04 0.00 0.01
2 0.0001 -1.97 -0.04 0.02 0.05
3 0.0003 -7.62 -0.09 -0.13 -0.02
4 0.0053 -130.76 0.03 -1.05 0.13
5 0.0054 -133.50 0.12 -1.14 0.08
6 0.0055 -135.88 -0.05 -1.30 -0.04
7 0.0167 -409.65 -0.01 -4.54 -0.10
8 0.1720 -2968.51 -0.02 -113.07 -0.04
9 0.1721 -2968.78 0.01 -113.19 -0.10
10 0.1722 -2969.73 -0.01 -113.27 -0.01
11 0.1750 -2984.57 0.04 -115.98 -0.00
12 0.1751 -2984.89 -0.02 -116.00 0.02
13 0.8109 8085.07 -0.11 -142.41 0.02
14 0.8109 8085.21 0.09 -142.35 0.07
15 0.8110 8084.79 -0.05 -142.53 -0.12
16 0.8110 8084.26 0.07 -142.43 -0.07
17 0.8956 6786.06 -0.06 -89.39 0.00
18 0.8958 6781.90 0.05 -89.22 0.11
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.
16GJ365 quality flag:2 Type: CLASSICAL SCATNEAR CLASSICAL axisobj 43.164 43.665 43.132 ecceobj 0.048 0.095 0.054 incobj 2.187 2.185 2.187 qmin 40.393 35.568 40.166 qmax 46.534 52.631 46.696 amean 43.367 43.773 43.338 amin 43.035 43.215 43.000 amax 43.713 44.305 43.687 emean 0.049 0.134 0.053 emin 0.028 0.085 0.032 emax 0.065 0.189 0.069 imean 0.895 2.516 0.897 imin 0.267 0.342 0.324 imax 1.463 5.136 1.467 excite_mean 0.052 0.143 0.055 fracstop 1.000 1.000 1.000 cjmean 3.091 3.072 3.090 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 184.3 177.2 185.3 kozaiamp 180.0 180.0 179.9