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: 16GY368
# Created Wed Nov 27 02:10:37 2024
# Orbit generated from Bernstein formalism
# Fitting 16 observations of 16
# Arc: 63.97d
# First observation: 2016/04/02
# Last observation: 2016/06/05
Preliminary a, adot, b, bdot, g, gdot:
-0.000000 0.029157 -0.000000 0.000738 0.025237 0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit: 7.74 DOF: 27 RMS: 0.12
# Min/Max residuals: -0.41 0.24
# Exact a, adot, b, bdot, g, gdot:
1.571431E-05 2.362571E-02 2.723564E-07 6.297438E-04 2.438908E-02 9.042885E-03
# Covariance matrix:
7.8068E-13 4.4150E-10 -1.8933E-14 8.8522E-12 8.4588E-11 -3.0563E-09
4.4150E-10 5.3941E-07 -2.3658E-11 1.0653E-08 8.9911E-08 -7.5504E-06
-1.8933E-14 -2.3658E-11 1.9090E-13 -1.5778E-12 -3.9207E-12 3.3777E-10
8.8522E-12 1.0653E-08 -1.5778E-12 2.2322E-10 1.7810E-09 -1.4759E-07
8.4588E-11 8.9911E-08 -3.9207E-12 1.7810E-09 1.5501E-08 -1.1095E-06
-3.0563E-09 -7.5504E-06 3.3777E-10 -1.4759E-07 -1.1095E-06 1.4898E-04
# lat0 lon0 xBary yBary zBary JD0
1.505181 -173.874745 -0.115216 0.026117 -0.988578 2457480.883919
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 46.67055 +/- 35.063
Argument of Peri: 314.08928 +/- 8.335
Long of Asc Node: 142.51880 +/- 0.617
Inclination: 2.12409 +/- 0.024
Eccentricity: 0.38584020 +/- 0.5100
Semi-Major Axis: 49.44067697 +/- 20.8917
Time of Perihelion: 2441019.1503 +/- 6639.3
Perihelion: 30.36447638 +/- 28.2924
Aphelion: 68.51687757 +/- 38.3938
Period (y) 347.6441 +/- 220.35
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.72849831 +/- 0.2080
Ecliptic Y -4.59626046 +/- 0.0223
Ecliptic Z 1.07704602 +/- 0.0055
Ecliptic XDOT -0.00072404 +/- 0.0014
Ecliptic YDOT -0.00275208 +/- 0.0001
Ecliptic ZDOT 0.00009734 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.99468073 +/- 0.2067
Geocenter to KBO 41.00196041 +/- 0.2093
# Hcoef: 9.34
The following table shows the complete astrometric record for 16GY368. 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 (16GY368) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.38313 12 24 52.58 -01 03 00.9 25.1i 16GY368 T09 C~89Td 2016 04 02.41191 12 24 52.46 -01 03 00.1 24.7i 16GY368 T09 C~89Td 2016 04 02.49363 12 24 52.09 -01 02 57.7 25.6i 16GY368 T09 C~89Td 2016 04 04.34027 12 24 43.88 -01 02 04.5 26.1g 16GY368 T09 C~89Td 2016 04 04.36377 12 24 43.80 -01 02 04.0 26.5g 16GY368 T09 C~89Td 2016 04 04.40858 12 24 43.58 -01 02 02.6 26.3g 16GY368 T09 C~89Td 2016 04 04.41735 12 24 43.55 -01 02 02.3 25.6g 16GY368 T09 C~89Td 2016 04 04.50037 12 24 43.16 -01 02 00.4 25.8g 16GY368 T09 C~89Td 2016 06 04.32166 12 21 32.59 -00 42 30.8 25.2z 16GY368 T09 C~89Td 2016 06 04.33787 12 21 32.55 -00 42 31.1 25.1z 16GY368 T09 C~89Td 2016 06 05.31150 12 21 31.49 -00 42 25.7 25.5r 16GY368 T09 C~89Td 2016 06 05.32218 12 21 31.48 -00 42 25.7 26.0r 16GY368 T09 C~89Td 2016 06 05.32429 12 21 31.47 -00 42 25.7 25.9r 16GY368 T09 C~89Td 2016 06 05.33704 12 21 31.46 -00 42 25.7 25.7r 16GY368 T09 C~89Td 2016 06 05.34129 12 21 31.45 -00 42 25.6 25.9r 16GY368 T09 C~89Td 2016 06 05.35188 12 21 31.44 -00 42 25.4 25.0r 16GY368 T09 C~89Td
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 -0.08 0.00 0.03
2 0.0001 -1.97 0.08 0.02 0.06
3 0.0003 -8.02 0.07 0.03 0.10
4 0.0054 -142.15 -0.22 0.19 0.03
5 0.0054 -143.45 0.21 0.17 0.02
6 0.0055 -147.03 -0.08 0.15 0.03
7 0.0056 -147.56 0.03 0.25 0.13
8 0.0058 -153.69 0.00 -0.32 -0.41
9 0.1723 -3241.69 0.09 -57.14 0.24
10 0.1724 -3242.12 -0.04 -57.65 -0.24
11 0.1750 -3258.87 0.01 -58.99 0.05
12 0.1751 -3259.00 0.06 -59.05 0.01
13 0.1751 -3259.14 -0.04 -59.11 -0.05
14 0.1751 -3259.28 0.05 -59.17 -0.08
15 0.1751 -3259.46 -0.05 -59.13 -0.04
16 0.1751 -3259.67 -0.09 -59.01 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.