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: 17DE165
# Created Mon Apr 28 01:11:06 2025
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 18
# Arc: 3.00y
# First observation: 2016/04/02
# Last observation: 2019/04/03
Preliminary a, adot, b, bdot, g, gdot:
-0.000006 0.031337 0.000012 -0.002189 0.028046 0.000000
# Chi-squared of fit: 5.15 DOF: 30 RMS: 0.09
# Min/Max residuals: -0.14 0.29
# Exact a, adot, b, bdot, g, gdot:
1.701221E-05 3.129266E-02 -1.377979E-06 -2.184890E-03 2.870245E-02 5.510831E-04
# Covariance matrix:
9.6237E-13 -2.1454E-12 -7.0586E-14 1.4549E-13 5.0984E-14 -1.9388E-11
-2.1454E-12 7.3576E-12 2.3584E-13 -5.2515E-13 -1.1261E-12 7.0955E-11
-7.0586E-14 2.3584E-13 2.2743E-13 -1.3804E-13 -2.9600E-14 2.2967E-12
1.4549E-13 -5.2515E-13 -1.3804E-13 1.4503E-13 8.3252E-14 -5.1418E-12
5.0984E-14 -1.1261E-12 -2.9600E-14 8.3252E-14 5.6586E-13 -1.1648E-11
-1.9388E-11 7.0955E-11 2.2967E-12 -5.1418E-12 -1.1648E-11 6.9538E-10
# lat0 lon0 xBary yBary zBary JD0
3.423528 -176.489836 -0.161372 0.058803 -0.980706 2457480.950920
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 12.69178 +/- 0.421
Argument of Peri: 124.86450 +/- 0.513
Long of Asc Node: 43.49005 +/- 0.004
Inclination: 5.20162 +/- 0.000
Eccentricity: 0.09204636 +/- 0.0005
Semi-Major Axis: 39.33924366 +/- 0.0127
Time of Perihelion: 2454303.2058 +/- 105.3
Perihelion: 35.71820961 +/- 0.0217
Aphelion: 42.96027771 +/- 0.0230
Period (y) 246.7443 +/- 0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -35.68729674 +/- 0.0009
Ecliptic Y -2.35316706 +/- 0.0001
Ecliptic Z 2.08051061 +/- 0.0001
Ecliptic XDOT 0.00011806 +/- 0.0000
Ecliptic YDOT -0.00299028 +/- 0.0000
Ecliptic ZDOT -0.00020489 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.82525741 +/- 0.0009
Geocenter to KBO 34.84023730 +/- 0.0009
# Hcoef: 9.06
The following table shows the complete astrometric record for 17DE165. 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 (17DE165) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.450131 12 18 19.38 +01 44 47.5 17DE165 T09 C~86uy 2016 06 04.285017 12 14 36.39 +02 03 26.2 17DE165 T09 C~86uy 2017 01 23.62773 12 29 23.53 +00 23 10.8 24.3i 17DE165 T09 C~81Bx 2017 01 23.63574 12 29 23.51 +00 23 11.0 24.3i 17DE165 T09 C~81Bx 2017 01 23.64112 12 29 23.50 +00 23 11.2 24.6i 17DE165 T09 C~81Bx 2017 01 23.64921 12 29 23.49 +00 23 11.3 25.0i 17DE165 T09 C~81Bx 2017 01 23.65460 12 29 23.50 +00 23 11.2 24.5i 17DE165 T09 C~81Bx 2017 01 28.59538 12 29 14.23 +00 24 31.5 24.0z 17DE165 T09 C~81Bx 2017 01 28.60612 12 29 14.20 +00 24 31.8 24.1z 17DE165 T09 C~81Bx 2017 01 28.63916 12 29 14.12 +00 24 32.3 24.1z 17DE165 T09 C~81Bx 2017 02 23.55008 12 27 50.46 +00 34 53.0 24.8r 17DE165 T09 C~81Bx 2017 02 23.61656 12 27 50.17 +00 34 54.8 24.7r 17DE165 T09 C~81Bx 2017 02 23.64828 12 27 50.04 +00 34 55.8 25.0r 17DE165 T09 C~81Bx 2017 03 04.601331 12 27 10.22 +00 39 26.9 17DE165 T09 C~86uy 2017 03 04.639242 12 27 10.04 +00 39 28.1 17DE165 T09 C~86uy 2019 04 03.439950 12 37 26.76 -00 44 03.7 17DE165 T09 C~86uy 2019 04 03.448087 12 37 26.72 -00 44 03.3 17DE165 T09 C~86uy 2019 04 03.472242 12 37 26.59 -00 44 02.6 17DE165 T09 C~86uy
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 0.05 0.00 0.04
2 0.1720 -3512.74 -0.05 -300.34 -0.10
3 0.8109 11096.86 0.06 -531.91 -0.11
4 0.8109 11096.50 -0.05 -531.85 -0.08
5 0.8109 11096.29 -0.11 -531.73 0.03
6 0.8109 11096.11 -0.05 -531.69 0.04
7 0.8110 11096.29 0.29 -531.73 -0.01
8 0.8245 10936.31 0.05 -513.37 -0.05
9 0.8245 10935.78 -0.08 -513.27 0.02
10 0.8246 10934.47 -0.14 -513.29 -0.10
11 0.8956 9532.79 -0.11 -443.16 0.16
12 0.8957 9528.08 -0.12 -443.24 0.01
13 0.8958 9525.89 -0.08 -443.10 0.11
14 0.9203 8868.76 0.17 -432.05 0.04
15 0.9204 8865.80 0.16 -432.02 0.05
16 3.0007 19398.53 0.01 -1351.86 -0.09
17 3.0007 19397.81 -0.00 -1351.73 0.06
18 3.0007 19395.73 -0.01 -1351.87 -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.
17DE165 quality flag:2 Type: CLASSICAL SCATNEAR CLASSICAL axisobj 38.960 39.008 38.912 ecceobj 0.083 0.085 0.081 incobj 5.214 5.214 5.214 qmin 34.718 34.338 34.713 qmax 43.899 44.464 43.681 amean 39.092 39.148 39.041 amin 38.753 38.789 38.716 amax 39.486 39.608 39.417 emean 0.086 0.088 0.084 emin 0.062 0.057 0.062 emax 0.112 0.124 0.109 imean 6.491 6.343 6.532 imin 4.631 4.497 4.621 imax 8.163 8.011 8.284 excite_mean 0.143 0.142 0.142 fracstop 1.000 1.000 1.000 cjmean 3.026 3.027 3.026 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 179.7 180.0 180.3 kozaiamp 179.9 179.9 180.0