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: 17DJ160
# Created Fri Nov 1 01:10:31 2024
# Orbit generated from Bernstein formalism
# Fitting 14 observations of 14
# Arc: 1.06y
# First observation: 2016/04/04
# Last observation: 2017/04/27
Preliminary a, adot, b, bdot, g, gdot:
-0.000002 0.023614 -0.000000 -0.005001 0.024006 0.000000
# Chi-squared of fit: 3.84 DOF: 22 RMS: 0.09
# Min/Max residuals: -0.20 0.20
# Exact a, adot, b, bdot, g, gdot:
1.573335E-05 2.377902E-02 -3.911262E-06 -5.037475E-03 2.420832E-02 3.735525E-03
# Covariance matrix:
3.4599E-13 4.7139E-12 1.3428E-14 -1.0662E-12 4.1568E-12 2.2157E-10
4.7139E-12 4.7990E-10 1.2853E-12 -1.0190E-10 4.0071E-10 2.1183E-08
1.3428E-14 1.2853E-12 2.9517E-13 -5.8673E-13 1.0759E-12 5.6814E-11
-1.0662E-12 -1.0190E-10 -5.8673E-13 2.2193E-11 -8.5250E-11 -4.5037E-09
4.1568E-12 4.0071E-10 1.0759E-12 -8.5250E-11 3.3630E-10 1.7724E-08
2.2157E-10 2.1183E-08 5.6814E-11 -4.5037E-09 1.7724E-08 9.3627E-07
# lat0 lon0 xBary yBary zBary JD0
3.658012 -170.731125 -0.096688 0.063386 -0.989451 2457482.972834
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 45.26264 +/- 2.512
Argument of Peri: 99.75432 +/- 5.974
Long of Asc Node: 25.82916 +/- 0.004
Inclination: 12.44775 +/- 0.003
Eccentricity: 0.18956977 +/- 0.0380
Semi-Major Axis: 47.59714609 +/- 0.6475
Time of Perihelion: 2442400.2967 +/- 778.4
Perihelion: 38.57416613 +/- 1.8849
Aphelion: 56.62012604 +/- 1.9674
Period (y) 328.3822 +/- 6.70
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.65234274 +/- 0.0308
Ecliptic Y -6.89767098 +/- 0.0050
Ecliptic Z 2.63537117 +/- 0.0020
Ecliptic XDOT -0.00001869 +/- 0.0001
Ecliptic YDOT -0.00273493 +/- 0.0000
Ecliptic ZDOT -0.00054159 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.30178130 +/- 0.0304
Geocenter to KBO 41.30811283 +/- 0.0313
# Hcoef: 8.55
The following table shows the complete astrometric record for 17DJ160. 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 (17DJ160) followed by the observatory code and reference code for the source of the astrometry.
2016 04 04.472045 12 39 48.95 -00 18 34.3 17DJ160 T09 C~81Bu 2016 04 04.515201 12 39 48.75 -00 18 33.4 17DJ160 T09 C~81Bu 2016 04 04.547236 12 39 48.61 -00 18 32.5 17DJ160 T09 C~81Bu 2016 04 06.480889 12 39 39.91 -00 17 43.9 17DJ160 T09 C~81Bu 2016 04 06.599635 12 39 39.35 -00 17 41.1 17DJ160 T09 C~81Bu 2017 02 21.53924 12 47 16.08 -01 23 54.7 24.0z 17DJ160 T09 C~7xTz 2017 02 21.58230 12 47 15.95 -01 23 53.7 24.6z 17DJ160 T09 C~7xTz 2017 02 21.60109 12 47 15.88 -01 23 53.4 24.4z 17DJ160 T09 C~7xTz 2017 02 23.53285 12 47 09.45 -01 23 11.6 25.3r 17DJ160 T09 C~7xTz 2017 02 23.60376 12 47 09.20 -01 23 10.2 25.2r 17DJ160 T09 C~7xTz 2017 02 23.63353 12 47 09.09 -01 23 09.7 24.7r 17DJ160 T09 C~7xTz 2017 02 23.64401 12 47 09.07 -01 23 09.4 24.9r 17DJ160 T09 C~7xTz 2017 04 27.373402 12 42 44.65 -00 57 47.4 17DJ160 T09 C~81Bu 2017 04 27.426120 12 42 44.43 -00 57 46.4 17DJ160 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 -0.04 0.00 0.13
2 0.0001 -3.11 0.01 -0.35 -0.06
3 0.0002 -5.40 0.06 -0.35 0.06
4 0.0055 -144.50 0.09 -6.88 0.06
5 0.0058 -153.32 -0.11 -7.60 -0.20
6 0.8845 7710.26 -0.02 -974.83 -0.10
7 0.8846 7708.08 0.14 -974.68 0.07
8 0.8847 7706.99 0.08 -974.81 -0.06
9 0.8900 7601.75 -0.08 -974.16 0.20
10 0.8902 7597.75 -0.08 -974.35 0.05
11 0.8902 7596.04 -0.12 -974.53 -0.13
12 0.8903 7595.64 0.08 -974.37 0.03
13 1.0620 3347.81 0.03 -1129.89 0.02
14 1.0622 3344.38 -0.02 -1130.26 -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.
17DJ160 quality flag:2 Type: SCATNEAR SCATNEAR CLASSICAL axisobj 47.073 49.737 45.757 ecceobj 0.185 0.291 0.088 incobj 12.503 12.494 12.511 qmin 37.491 34.664 41.037 qmax 57.710 66.022 51.162 amean 47.310 50.002 45.988 amin 46.885 49.433 45.614 amax 47.868 50.710 46.392 emean 0.188 0.288 0.092 emin 0.170 0.271 0.081 emax 0.207 0.305 0.104 imean 12.285 12.616 12.096 imin 11.635 11.681 11.726 imax 12.939 13.415 12.445 excite_mean 0.284 0.362 0.229 fracstop 1.000 1.000 1.000 cjmean 3.042 3.010 3.061 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 181.3 178.8 179.0 kozaiamp 180.0 180.0 180.0