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: 17DV165
# Created Mon Apr 28 01:11:06 2025
# Orbit generated from Bernstein formalism
# Fitting 14 observations of 14
# Arc: 3.00y
# First observation: 2016/04/04
# Last observation: 2019/04/06
Preliminary a, adot, b, bdot, g, gdot:
-0.000082 0.022110 0.000006 -0.001413 0.023322 0.000000
# Chi-squared of fit: 17.25 DOF: 22 RMS: 0.20
# Min/Max residuals: -0.45 0.44
# Exact a, adot, b, bdot, g, gdot:
1.437549E-05 2.203709E-02 -1.329950E-06 -1.408639E-03 2.348100E-02 -6.286460E-04
# Covariance matrix:
7.3160E-13 -9.6109E-13 -2.4628E-14 4.6863E-14 -3.2570E-13 -1.0828E-11
-9.6109E-13 2.0107E-12 5.4548E-14 -1.1520E-13 1.5106E-13 2.6717E-11
-2.4628E-14 5.4548E-14 3.1791E-13 -2.2855E-13 9.3409E-15 8.1817E-13
4.6863E-14 -1.1520E-13 -2.2855E-13 2.4772E-13 -7.3467E-15 -1.7411E-12
-3.2570E-13 1.5106E-13 9.3409E-15 -7.3467E-15 6.4480E-13 1.6071E-12
-1.0828E-11 2.6717E-11 8.1817E-13 -1.7411E-12 1.6071E-12 4.0389E-10
# lat0 lon0 xBary yBary zBary JD0
3.810802 -170.832316 -0.099187 0.066005 -0.989040 2457483.015990
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 236.84948 +/- 0.823
Argument of Peri: 260.50423 +/- 0.825
Long of Asc Node: 54.73837 +/- 0.010
Inclination: 5.21940 +/- 0.001
Eccentricity: 0.03108105 +/- 0.0008
Semi-Major Axis: 42.82492335 +/- 0.0061
Time of Perihelion: 2492497.3488 +/- 234.0
Perihelion: 41.49387957 +/- 0.0340
Aphelion: 44.15596713 +/- 0.0341
Period (y) 280.2548 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -42.91711863 +/- 0.0014
Ecliptic Y -7.02876029 +/- 0.0003
Ecliptic Z 2.83044043 +/- 0.0001
Ecliptic XDOT 0.00047094 +/- 0.0000
Ecliptic YDOT -0.00253374 +/- 0.0000
Ecliptic ZDOT -0.00016875 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.58088957 +/- 0.0014
Geocenter to KBO 42.58763008 +/- 0.0015
# Hcoef: 8.48
The following table shows the complete astrometric record for 17DV165. 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 (17DV165) followed by the observatory code and reference code for the source of the astrometry.
2016 04 04.515201 12 39 41.06 -00 07 45.7 17DV165 T09 C~83F3 2016 04 04.557901 12 39 40.85 -00 07 44.8 17DV165 T09 C~83F3 2017 02 21.49208 12 47 01.91 -01 00 35.5 23.8z 17DV165 T09 C~83F3 2017 02 21.51504 12 47 01.82 -01 00 34.5 24.5z 17DV165 T09 C~83F3 2017 02 21.53924 12 47 01.79 -01 00 34.5 24.3z 17DV165 T09 C~83F3 2017 02 21.56076 12 47 01.69 -01 00 33.8 24.8z 17DV165 T09 C~83F3 2017 02 21.58766 12 47 01.60 -01 00 33.3 24.6z 17DV165 T09 C~83F3 2017 02 21.60910 12 47 01.55 -01 00 32.7 24.1z 17DV165 T09 C~83F3 2017 02 23.53285 12 46 55.33 -00 59 48.2 25.4r 17DV165 T09 C~83F3 2017 02 23.56973 12 46 55.23 -00 59 47.5 25.5r 17DV165 T09 C~83F3 2017 02 23.60376 12 46 55.08 -00 59 46.0 25.7r 17DV165 T09 C~83F3 2017 04 27.380876 12 42 38.55 -00 32 54.3 17DV165 T09 C~83F3 2017 04 27.408451 12 42 38.44 -00 32 53.7 17DV165 T09 C~83F3 2019 04 06.501697 12 53 12.72 -01 50 08.1 17DV165 T09 C~83F3
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 0.10 0.00 0.08
2 0.0001 -3.25 -0.11 -0.41 -0.26
3 0.8843 7328.99 -0.05 -319.51 -0.06
4 0.8843 7327.36 -0.45 -319.12 0.28
5 0.8844 7326.94 0.44 -319.30 0.06
6 0.8845 7325.29 -0.06 -319.24 0.07
7 0.8845 7323.85 -0.05 -319.31 -0.05
8 0.8846 7322.92 0.18 -319.05 0.16
9 0.8898 7219.53 -0.02 -314.72 -0.17
10 0.8900 7217.87 0.38 -314.67 -0.19
11 0.8900 7215.21 -0.38 -314.17 0.25
12 1.0619 3041.07 0.01 -342.05 -0.04
13 1.0620 3039.31 -0.01 -342.15 -0.04
14 3.0034 13626.45 -0.00 -874.97 -0.07
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.
17DV165 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.388 42.408 42.368 ecceobj 0.038 0.037 0.039 incobj 5.232 5.232 5.232 qmin 40.172 40.246 40.055 qmax 45.243 45.202 45.344 amean 42.607 42.627 42.587 amin 42.280 42.303 42.255 amax 42.942 42.962 42.934 emean 0.036 0.034 0.037 emin 0.012 0.011 0.012 emax 0.054 0.053 0.057 imean 3.268 3.283 3.254 imin 2.179 2.219 2.145 imax 4.466 4.466 4.466 excite_mean 0.068 0.068 0.069 fracstop 1.000 1.000 1.000 cjmean 3.080 3.080 3.079 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 179.0 179.2 178.7 kozaiamp 180.0 180.0 179.9