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: 17DJ163
# Created Tue Apr 1 01:11:04 2025
# Orbit generated from Bernstein formalism
# Fitting 33 observations of 34
# Arc: 3.08y
# First observation: 2016/04/02
# Last observation: 2019/04/03
Preliminary a, adot, b, bdot, g, gdot:
-0.000250 0.025144 0.000001 -0.000797 0.024272 0.000000
# Chi-squared of fit: 10.81 DOF: 60 RMS: 0.10
# Min/Max residuals: -0.22 0.33
# Exact a, adot, b, bdot, g, gdot:
1.557235E-05 2.494688E-02 -2.666089E-06 -7.922205E-04 2.468218E-02 -1.453827E-03
# Covariance matrix:
4.0651E-13 -8.3867E-13 -4.8531E-15 2.5108E-14 1.3929E-13 -1.1121E-11
-8.3867E-13 2.1733E-12 1.5196E-14 -6.9138E-14 -2.1990E-13 3.0433E-11
-4.8531E-15 1.5196E-14 7.9257E-14 -5.4575E-14 -1.0503E-16 2.2988E-13
2.5108E-14 -6.9138E-14 -5.4575E-14 8.7967E-14 5.7545E-15 -1.0164E-12
1.3929E-13 -2.1990E-13 -1.0503E-16 5.7545E-15 1.2188E-13 -2.6538E-12
-1.1121E-11 3.0433E-11 2.2988E-13 -1.0164E-12 -2.6538E-12 4.4672E-10
# lat0 lon0 xBary yBary zBary JD0
2.163700 -174.698254 0.378073 0.034661 -0.912586 2457450.856277
# Heliocentric elements and errors
Epoch: 2457450.5000 = 2016/03/03
Mean Anomaly: 324.85217 +/- 0.316
Argument of Peri: 173.30634 +/- 0.418
Long of Asc Node: 54.38346 +/- 0.010
Inclination: 2.77700 +/- 0.000
Eccentricity: 0.10578091 +/- 0.0005
Semi-Major Axis: 45.14693917 +/- 0.0039
Time of Perihelion: 2468268.2499 +/- 97.2
Perihelion: 40.37125475 +/- 0.0230
Aphelion: 49.92262359 +/- 0.0231
Period (y) 303.3547 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.26096273 +/- 0.0006
Ecliptic Y -3.45135464 +/- 0.0000
Ecliptic Z 1.52950780 +/- 0.0000
Ecliptic XDOT 0.00041267 +/- 0.0000
Ecliptic YDOT -0.00274777 +/- 0.0000
Ecliptic ZDOT -0.00009389 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.43329927 +/- 0.0006
Geocenter to KBO 40.51506675 +/- 0.0006
# Hcoef: 8.02
The following table shows the complete astrometric record for 17DJ163. 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 (17DJ163) followed by the observatory code and reference code for the source of the astrometry.
2016 03 03.355488 12 22 53.724 -00 07 10.99 22.2i 17DJ163 W84 C~8HKW 2016 04 02.389682 12 20 41.18 +00 07 06.7 17DJ163 T09 C~81Bu 2016 04 02.523267 12 20 40.57 +00 07 10.4 17DJ163 T09 C~81Bu 2016 04 04.34598 12 20 32.42 +00 08 01.5 25.4g 17DJ163 T09 C~89UX 2016 04 04.36800 12 20 32.32 +00 08 02.1 25.8g 17DJ163 T09 C~89UX 2016 04 04.38727 12 20 32.24 +00 08 03.0 25.9g 17DJ163 T09 C~89UX 2016 04 04.38940 12 20 32.23 +00 08 02.8 25.2g 17DJ163 T09 C~89UX 2016 04 04.41295 12 20 32.12 +00 08 03.3 25.0g 17DJ163 T09 C~89UX 2016 04 04.41948 12 20 32.10 +00 08 03.5 25.3g 17DJ163 T09 C~89UX 2016 06 04.26227 12 17 22.91 +00 25 50.8 23.7z 17DJ163 T09 C~8COu 2016 06 04.27037 12 17 22.90 +00 25 51.1 23.7z 17DJ163 T09 C~8COu 2016 06 04.28656 12 17 22.89 +00 25 51.1 23.7z 17DJ163 T09 C~8COu 2016 06 04.28926 12 17 22.88 +00 25 51.1 23.6z 17DJ163 T09 C~8COu 2016 06 04.30544 12 17 22.87 +00 25 51.1 23.8z 17DJ163 T09 C~8COu 2016 06 04.31085 12 17 22.87 +00 25 51.1 23.8z 17DJ163 T09 C~8COu 2016 06 04.32707 12 17 22.86 +00 25 51.1 23.8z 17DJ163 T09 C~8COu 2016 06 04.34057 12 17 22.82 +00 25 51.1 23.4z 17DJ163 T09 C~8COu 2016 06 04.34327 12 17 22.83 +00 25 51.1 23.7z 17DJ163 T09 C~8COu 2016 06 05.317193 12 17 21.85 +00 25 53.9 17DJ163 T09 C~81Bu 2016 06 05.356114 12 17 21.81 +00 25 54.0 17DJ163 T09 C~81Bu 2017 01 23.60759 12 29 58.31 -00 57 08.4 23.9i 17DJ163 T09 C~7zpo 2017 01 23.62095 12 29 58.29 -00 57 08.2 23.8i 17DJ163 T09 C~7zpo 2017 01 23.64653 12 29 58.25 -00 57 08.1 24.1i 17DJ163 T09 C~7zpo 2017 01 23.65191 12 29 58.24 -00 57 08.1 24.5i 17DJ163 T09 C~7zpo 2017 01 28.59808 12 29 50.06 -00 56 02.6 23.9z 17DJ163 T09 C~7zpo 2017 01 28.60345 12 29 50.06 -00 56 02.6 23.9z 17DJ163 T09 C~7zpo 2017 01 28.61691 12 29 50.03 -00 56 02.2 23.6z 17DJ163 T09 C~7zpo 2017 01 28.62228 12 29 50.02 -00 56 02.2 23.8z 17DJ163 T09 C~7zpo 2017 01 28.65069 12 29 49.97 -00 56 01.7 24.1z 17DJ163 T09 C~7zpo 2017 02 23.52167 12 28 36.89 -00 47 18.6 24.4r 17DJ163 T09 C~7zpo 2017 02 23.56346 12 28 36.73 -00 47 17.6 24.4r 17DJ163 T09 C~7zpo 2017 02 23.60592 12 28 36.57 -00 47 16.6 24.5r 17DJ163 T09 C~7zpo 2019 04 03.440043 12 36 20.01 -01 42 59.2 17DJ163 T09 C~81Bu 2019 04 03.464217 12 36 19.89 -01 42 58.5 17DJ163 T09 C~81Bu
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 ( 0.45)
2 0.0822 -2165.35 0.05 0.08 -0.04
3 0.0826 -2175.22 0.07 -0.15 -0.09
4 0.0876 -2307.73 -0.07 -1.65 -0.04
5 0.0876 -2309.34 -0.06 -1.69 -0.05
6 0.0877 -2310.80 -0.10 -1.34 0.33
7 0.0877 -2310.86 -0.00 -1.58 0.09
8 0.0878 -2312.57 0.02 -1.78 -0.07
9 0.0878 -2312.93 0.15 -1.71 -0.00
10 0.2544 -5342.49 -0.09 -145.65 -0.22
11 0.2544 -5342.75 -0.20 -145.43 0.02
12 0.2544 -5342.89 -0.07 -145.49 0.03
13 0.2544 -5343.02 -0.16 -145.55 -0.02
14 0.2545 -5343.16 -0.02 -145.61 -0.02
15 0.2545 -5343.16 0.07 -145.61 0.00
16 0.2545 -5343.30 0.20 -145.67 0.00
17 0.2546 -5343.85 -0.12 -145.90 -0.18
18 0.2546 -5343.71 0.06 -145.85 -0.11
19 0.2573 -5358.33 0.13 -149.10 -0.08
20 0.2574 -5358.92 0.13 -149.24 -0.08
21 0.8932 7037.54 -0.09 -230.72 0.15
22 0.8933 7037.18 -0.10 -230.66 0.19
23 0.8933 7036.59 -0.03 -230.80 -0.00
24 0.8934 7036.45 -0.03 -230.86 -0.07
25 0.9069 6897.71 -0.06 -219.26 -0.06
26 0.9069 6897.71 0.11 -219.26 -0.07
27 0.9069 6897.13 -0.02 -219.07 0.10
28 0.9070 6897.00 0.02 -219.13 0.03
29 0.9070 6896.11 0.06 -218.97 0.14
30 0.9779 5681.36 0.07 -172.45 0.15
31 0.9780 5678.76 0.04 -172.49 0.09
32 0.9781 5676.16 0.05 -172.52 0.03
33 3.0831 13398.79 0.06 -493.78 -0.06
34 3.0831 13396.86 -0.06 -493.84 -0.10
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.
17DJ163 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.637 44.654 44.619 ecceobj 0.097 0.096 0.098 incobj 2.782 2.782 2.782 qmin 39.805 39.828 39.737 qmax 50.234 50.196 50.233 amean 44.870 44.888 44.852 amin 44.512 44.530 44.495 amax 45.264 45.287 45.250 emean 0.096 0.095 0.096 emin 0.081 0.080 0.082 emax 0.110 0.109 0.111 imean 1.785 1.788 1.783 imin 1.116 1.125 1.106 imax 2.278 2.268 2.295 excite_mean 0.101 0.100 0.101 fracstop 1.000 1.000 1.000 cjmean 3.100 3.100 3.099 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 182.5 182.2 182.7 kozaiamp 180.0 180.0 179.9