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: 17DQ164
# Created Sun Dec 22 02:10:57 2024
# Orbit generated from Bernstein formalism
# Fitting 30 observations of 30
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000062 0.021873 -0.000000 0.000069 0.022818 0.000000
# Chi-squared of fit: 11.68 DOF: 54 RMS: 0.11
# Min/Max residuals: -0.27 0.20
# Exact a, adot, b, bdot, g, gdot:
1.434187E-05 2.174024E-02 5.970766E-08 7.099143E-05 2.317610E-02 -1.855596E-03
# Covariance matrix:
2.8032E-13 2.6414E-12 9.8574E-15 -1.6182E-14 1.2845E-12 1.1235E-10
2.6414E-12 2.0318E-10 5.1870E-13 -1.0916E-12 7.2053E-11 7.3532E-09
9.8574E-15 5.1870E-13 1.4487E-13 -1.8271E-13 1.9190E-13 1.9077E-11
-1.6182E-14 -1.0916E-12 -1.8271E-13 3.5074E-13 -3.9064E-13 -3.9674E-11
1.2845E-12 7.2053E-11 1.9190E-13 -3.9064E-13 2.6412E-11 2.6412E-09
1.1235E-10 7.3532E-09 1.9077E-11 -3.9674E-11 2.6412E-09 2.6761E-07
# lat0 lon0 xBary yBary zBary JD0
2.031251 -174.425710 -0.124898 0.035150 -0.987125 2457480.894196
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 272.10889 +/- 2.229
Argument of Peri: 182.16936 +/- 1.706
Long of Asc Node: 100.82475 +/- 0.049
Inclination: 1.99349 +/- 0.000
Eccentricity: 0.08180866 +/- 0.0234
Semi-Major Axis: 43.97770388 +/- 0.1564
Time of Perihelion: 2483487.4664 +/- 644.8
Perihelion: 40.37994670 +/- 1.0375
Aphelion: 47.57546107 +/- 1.0414
Period (y) 291.6467 +/- 1.56
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -43.89152835 +/- 0.0095
Ecliptic Y -4.41150912 +/- 0.0009
Ecliptic Z 1.52938510 +/- 0.0003
Ecliptic XDOT 0.00046790 +/- 0.0001
Ecliptic YDOT -0.00254176 +/- 0.0000
Ecliptic ZDOT 0.00000062 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.13917413 +/- 0.0095
Geocenter to KBO 43.14789778 +/- 0.0096
# Hcoef: 7.94
The following table shows the complete astrometric record for 17DQ164. 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 (17DQ164) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.393407 12 23 41.16 -00 20 57.1 17DQ164 T09 C~83F2 2016 04 02.515196 12 23 40.63 -00 20 53.7 17DQ164 T09 C~83F2 2016 04 04.36377 12 23 32.79 -00 20 03.5 25.6g 17DQ164 T09 C~89UX 2016 04 04.38940 12 23 32.66 -00 20 02.9 26.1g 17DQ164 T09 C~89UX 2016 04 04.40648 12 23 32.60 -00 20 02.4 25.4g 17DQ164 T09 C~89UX 2016 04 04.41735 12 23 32.54 -00 20 02.4 25.7g 17DQ164 T09 C~89UX 2016 06 04.25539 12 20 29.77 -00 02 08.9 23.8z 17DQ164 T09 C~8COu 2016 06 04.27307 12 20 29.73 -00 02 08.7 23.9z 17DQ164 T09 C~8COu 2016 06 04.28926 12 20 29.72 -00 02 08.5 23.4z 17DQ164 T09 C~8COu 2016 06 04.32166 12 20 29.68 -00 02 08.5 23.8z 17DQ164 T09 C~8COu 2016 06 04.34327 12 20 29.66 -00 02 08.2 23.7z 17DQ164 T09 C~8COu 2016 06 05.311488 12 20 28.63 -00 02 04.5 17DQ164 T09 C~83F2 2016 06 05.356114 12 20 28.59 -00 02 04.3 17DQ164 T09 C~83F2 2017 01 23.60759 12 32 08.23 -01 16 57.6 24.1i 17DQ164 T09 C~81Bw 2017 01 23.61828 12 32 08.22 -01 16 57.6 24.0i 17DQ164 T09 C~81Bw 2017 01 23.65191 12 32 08.17 -01 16 57.0 24.1i 17DQ164 T09 C~81Bw 2017 01 28.61959 12 32 00.45 -01 15 53.6 24.2z 17DQ164 T09 C~81Bw 2017 01 28.62228 12 32 00.45 -01 15 53.6 23.9z 17DQ164 T09 C~81Bw 2017 01 28.64259 12 32 00.42 -01 15 53.5 23.9z 17DQ164 T09 C~81Bw 2017 01 28.64799 12 32 00.41 -01 15 53.3 24.1z 17DQ164 T09 C~81Bw 2017 01 28.65069 12 32 00.41 -01 15 53.3 24.0z 17DQ164 T09 C~81Bw 2017 01 28.65336 12 32 00.41 -01 15 53.1 24.4z 17DQ164 T09 C~81Bw 2017 02 02.60942 12 31 50.76 -01 14 38.2 23.9i 17DQ164 T09 C~81Bw 2017 02 02.64454 12 31 50.71 -01 14 37.5 23.8i 17DQ164 T09 C~81Bw 2017 02 23.52167 12 30 51.70 -01 07 31.2 24.9r 17DQ164 T09 C~81Bw 2017 02 23.52446 12 30 51.68 -01 07 31.4 24.4r 17DQ164 T09 C~81Bw 2017 02 23.56346 12 30 51.54 -01 07 30.2 24.4r 17DQ164 T09 C~81Bw 2017 02 23.59748 12 30 51.43 -01 07 29.7 24.5r 17DQ164 T09 C~81Bw 2017 02 23.62726 12 30 51.32 -01 07 28.7 24.3r 17DQ164 T09 C~81Bw 2017 02 23.63774 12 30 51.29 -01 07 28.7 24.7r 17DQ164 T09 C~81Bw
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 -0.00
2 0.0003 -8.65 0.04 -0.03 0.06
3 0.0054 -136.51 0.06 -0.48 0.16
4 0.0055 -138.54 -0.17 -0.71 -0.04
5 0.0055 -139.56 0.01 -0.60 0.08
6 0.0055 -140.39 -0.06 -0.96 -0.27
7 0.1721 -3083.15 0.17 -100.65 -0.07
8 0.1722 -3083.78 -0.15 -100.71 -0.07
9 0.1722 -3083.99 -0.07 -100.58 0.10
10 0.1723 -3084.54 -0.04 -100.82 -0.04
11 0.1723 -3084.94 -0.05 -100.66 0.18
12 0.1750 -3100.59 0.02 -103.38 -0.08
13 0.1751 -3101.22 0.13 -103.44 0.00
14 0.8110 8318.71 -0.03 -76.81 0.07
15 0.8110 8318.58 0.09 -76.87 -0.01
16 0.8111 8317.65 -0.02 -76.61 0.17
17 0.8247 8186.03 -0.18 -64.15 -0.02
18 0.8247 8186.03 -0.10 -64.15 -0.03
19 0.8248 8185.58 0.07 -64.23 -0.15
20 0.8248 8185.36 0.02 -64.11 -0.04
21 0.8248 8185.36 0.10 -64.11 -0.05
22 0.8248 8185.28 0.10 -63.92 0.13
23 0.8384 8022.49 -0.17 -52.35 -0.27
24 0.8385 8021.53 0.16 -52.00 0.01
25 0.8956 7038.81 0.02 -10.42 0.20
26 0.8956 7038.61 -0.02 -10.72 -0.10
27 0.8957 7036.21 -0.16 -10.45 0.12
28 0.8958 7034.49 0.10 -10.64 -0.11
29 0.8959 7032.58 -0.08 -10.38 0.12
30 0.8959 7032.16 0.11 -10.56 -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.
17DQ164 quality flag:2 Type: 7:4EEE CLASSICAL CLASSICAL axisobj 43.517 44.007 43.366 ecceobj 0.082 0.145 0.034 incobj 1.993 1.993 1.993 qmin 39.445 37.174 41.379 qmax 48.310 51.722 45.935 amean 43.726 44.257 43.584 amin 43.360 43.885 43.251 amax 44.117 44.670 43.925 emean 0.083 0.139 0.029 emin 0.072 0.116 0.012 emax 0.095 0.158 0.046 imean 0.847 1.526 0.855 imin 0.034 0.224 0.074 imax 1.452 2.772 1.372 excite_mean 0.085 0.142 0.034 fracstop 1.000 1.000 1.000 cjmean 3.090 3.080 3.095 libcent 0 181.1 -180.0 -180.0 libamp 0 104.5 -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 166.5 170.6 176.4 kozaiamp 180.0 180.0 180.0