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: 17DD165
# Created Sun Dec 22 02:10:58 2024
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 18
# Arc: 3.00y
# First observation: 2016/04/04
# Last observation: 2019/04/06
Preliminary a, adot, b, bdot, g, gdot:
-0.000203 0.028400 -0.000027 0.003375 0.027660 0.000000
# Chi-squared of fit: 6.24 DOF: 30 RMS: 0.10
# Min/Max residuals: -0.21 0.20
# Exact a, adot, b, bdot, g, gdot:
1.616058E-05 2.820434E-02 1.687137E-06 3.349028E-03 2.776127E-02 -1.232610E-03
# Covariance matrix:
7.0109E-13 -7.8030E-13 3.8090E-14 -7.3127E-14 -4.0031E-13 -6.4549E-12
-7.8030E-13 1.4007E-12 -8.7385E-14 1.5892E-13 2.2456E-13 1.3950E-11
3.8090E-14 -8.7385E-14 2.3995E-13 -1.3479E-13 -2.3281E-15 -9.6400E-13
-7.3127E-14 1.5892E-13 -1.3479E-13 1.2056E-13 1.2387E-14 1.7363E-12
-4.0031E-13 2.2456E-13 -2.3281E-15 1.2387E-14 6.4519E-13 1.1625E-12
-6.4549E-12 1.3950E-11 -9.6400E-13 1.7363E-12 1.1625E-12 1.5227E-10
# lat0 lon0 xBary yBary zBary JD0
3.060865 -171.595216 -0.111117 0.052992 -0.988539 2457482.943323
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 255.70487 +/- 0.151
Argument of Peri: 132.77187 +/- 0.144
Long of Asc Node: 164.84620 +/- 0.002
Inclination: 7.36680 +/- 0.001
Eccentricity: 0.04180251 +/- 0.0004
Semi-Major Axis: 36.57787800 +/- 0.0039
Time of Perihelion: 2480889.7616 +/- 33.7
Perihelion: 35.04883092 +/- 0.0160
Aphelion: 38.10692507 +/- 0.0161
Period (y) 221.2259 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -36.55047235 +/- 0.0010
Ecliptic Y -5.51483703 +/- 0.0002
Ecliptic Z 1.92351812 +/- 0.0001
Ecliptic XDOT 0.00054422 +/- 0.0000
Ecliptic YDOT -0.00273833 +/- 0.0000
Ecliptic ZDOT 0.00032333 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 37.01419158 +/- 0.0010
Geocenter to KBO 36.02140786 +/- 0.0010
# Hcoef: 8.30
The following table shows the complete astrometric record for 17DD165. 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 (17DD165) followed by the observatory code and reference code for the source of the astrometry.
2016 04 04.442534 12 35 42.25 -00 31 10.4 17DD165 T09 C~86uy 2016 04 04.513078 12 35 41.89 -00 31 08.1 17DD165 T09 C~86uy 2017 02 21.48870 12 45 12.05 -01 22 06.5 23.7z 17DD165 T09 C~81Bx 2017 02 21.51504 12 45 11.95 -01 22 05.7 23.6z 17DD165 T09 C~81Bx 2017 02 21.56076 12 45 11.77 -01 22 04.7 23.8z 17DD165 T09 C~81Bx 2017 02 21.58766 12 45 11.68 -01 22 04.0 23.7z 17DD165 T09 C~81Bx 2017 02 21.60109 12 45 11.64 -01 22 03.5 23.4z 17DD165 T09 C~81Bx 2017 02 23.56973 12 45 04.35 -01 21 05.7 24.2r 17DD165 T09 C~81Bx 2017 02 23.60376 12 45 04.23 -01 21 04.9 24.0r 17DD165 T09 C~81Bx 2017 03 04.54160 12 44 28.08 -01 16 27.9 24.1y 17DD165 T09 C~81Bx 2017 03 04.58510 12 44 27.89 -01 16 26.7 23.8y 17DD165 T09 C~81Bx 2017 03 04.62031 12 44 27.75 -01 16 25.4 23.8y 17DD165 T09 C~81Bx 2017 03 04.63382 12 44 27.68 -01 16 25.2 23.5y 17DD165 T09 C~81Bx 2017 04 27.380876 12 40 09.92 -00 47 08.4 17DD165 T09 C~86uy 2018 05 11.086783 12 45 30.163 -01 09 09.18 24.4V 17DD165 W84 C~8HKW 2019 04 04.532939 12 54 36.58 -01 54 34.8 17DD165 T09 C~86uy 2019 04 06.350099 12 54 27.44 -01 53 33.7 17DD165 T09 C~86uy 2019 04 06.501697 12 54 26.66 -01 53 28.6 17DD165 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 -0.02 0.00 0.05
2 0.0002 -5.87 -0.01 -0.01 -0.03
3 0.8845 9064.90 -0.01 551.15 0.13
4 0.8845 9063.21 -0.05 551.29 0.15
5 0.8846 9060.33 -0.06 551.15 -0.20
6 0.8847 9058.81 0.11 551.26 -0.21
7 0.8848 9058.06 0.20 551.49 -0.05
8 0.8901 8934.59 -0.09 561.69 0.11
9 0.8902 8932.61 0.15 561.72 -0.01
10 0.9147 8324.20 -0.19 603.42 0.10
11 0.9148 8321.11 -0.10 603.41 -0.08
12 0.9149 8318.66 0.03 603.78 0.16
13 0.9150 8317.61 -0.03 603.55 -0.13
14 1.0621 4068.46 0.13 698.87 0.02
15 2.0990 9009.24 -0.07 1373.48 -0.02
16 2.9982 17652.53 -0.14 2086.13 -0.01
17 3.0032 17501.42 0.09 2088.58 0.01
18 3.0036 17488.57 0.07 2088.68 0.02
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.
17DD165 quality flag:3 Type: 4:3E 4:3E 4:3E axisobj 36.245 36.258 36.232 ecceobj 0.045 0.044 0.046 incobj 7.400 7.400 7.400 qmin 33.688 33.699 33.607 qmax 39.672 39.625 39.700 amean 36.487 36.488 36.487 amin 36.156 36.159 36.137 amax 36.842 36.837 36.852 emean 0.053 0.052 0.054 emin 0.031 0.031 0.030 emax 0.077 0.076 0.078 imean 5.530 5.503 5.521 imin 3.645 3.601 3.711 imax 7.004 6.993 6.973 excite_mean 0.111 0.110 0.111 fracstop 1.000 1.000 1.000 cjmean 3.014 3.014 3.014 libcent 0 178.0 181.2 179.5 libamp 0 79.7 71.0 88.1 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 179.7 179.5 179.5 kozaiamp 180.0 179.9 180.0