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: 17DJ170
# Created Tue Apr 1 01:11:05 2025
# Orbit generated from Bernstein formalism
# Fitting 17 observations of 17
# Arc: 3.01y
# First observation: 2016/04/01
# Last observation: 2019/04/06
Preliminary a, adot, b, bdot, g, gdot:
-0.000034 0.025413 0.000000 -0.000804 0.024842 0.000000
# Chi-squared of fit: 4.50 DOF: 28 RMS: 0.09
# Min/Max residuals: -0.23 0.19
# Exact a, adot, b, bdot, g, gdot:
1.614993E-05 2.541306E-02 -1.262471E-07 -8.058653E-04 2.506475E-02 5.823607E-04
# Covariance matrix:
4.8821E-13 -6.4834E-13 -8.7962E-15 1.7184E-14 -2.0643E-13 -6.4246E-12
-6.4834E-13 1.5769E-12 1.7602E-14 -4.8073E-14 -1.0376E-13 1.8527E-11
-8.7962E-15 1.7602E-14 2.1378E-13 -1.1222E-13 6.1177E-15 2.1151E-13
1.7184E-14 -4.8073E-14 -1.1222E-13 9.9970E-14 4.1869E-15 -6.0339E-13
-2.0643E-13 -1.0376E-13 6.1177E-15 4.1869E-15 7.5295E-13 -2.2181E-12
-6.4246E-12 1.8527E-11 2.1151E-13 -6.0339E-13 -2.2181E-12 2.3329E-10
# lat0 lon0 xBary yBary zBary JD0
5.572035 -172.292423 -0.069012 0.096558 -0.988198 2457479.787106
# Heliocentric elements and errors
Epoch: 2457470.5000 = 2016/03/23
Mean Anomaly: 17.68076 +/- 0.358
Argument of Peri: 87.83247 +/- 0.424
Long of Asc Node: 79.26929 +/- 0.007
Inclination: 5.73200 +/- 0.000
Eccentricity: 0.07592349 +/- 0.0004
Semi-Major Axis: 44.04852206 +/- 0.0098
Time of Perihelion: 2452226.1237 +/- 106.3
Perihelion: 40.70420466 +/- 0.0179
Aphelion: 47.39283946 +/- 0.0187
Period (y) 292.3514 +/- 0.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -40.32776599 +/- 0.0014
Ecliptic Y -5.52977703 +/- 0.0002
Ecliptic Z 3.87385877 +/- 0.0001
Ecliptic XDOT 0.00030118 +/- 0.0000
Ecliptic YDOT -0.00276744 +/- 0.0000
Ecliptic ZDOT -0.00008143 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.88904407 +/- 0.0013
Geocenter to KBO 39.89666308 +/- 0.0014
# Hcoef: 7.73
The following table shows the complete astrometric record for 17DJ170. 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 (17DJ170) followed by the observatory code and reference code for the source of the astrometry.
2016 04 01.286317 12 37 06.32 +02 03 44.7 17DJ170 T09 C~89UY 2016 04 01.305734 12 37 06.24 +02 03 45.3 17DJ170 T09 C~89UY 2016 04 01.527674 12 37 05.19 +02 03 51.6 17DJ170 T09 C~89UY 2017 02 21.50898 12 45 06.48 +01 07 48.6 23.4z 17DJ170 T09 C~89UY 2017 02 21.54460 12 45 06.35 +01 07 49.7 23.7z 17DJ170 T09 C~89UY 2017 02 21.55274 12 45 06.32 +01 07 50.0 23.4z 17DJ170 T09 C~89UY 2017 02 21.57695 12 45 06.25 +01 07 50.5 23.6z 17DJ170 T09 C~89UY 2017 02 21.61716 12 45 06.11 +01 07 51.7 24.0z 17DJ170 T09 C~89UY 2017 02 23.55846 12 44 59.51 +01 08 43.2 23.8r 17DJ170 T09 C~89UY 2017 02 23.59097 12 44 59.40 +01 08 44.3 24.0r 17DJ170 T09 C~89UY 2017 02 23.65456 12 44 59.18 +01 08 45.9 23.9r 17DJ170 T09 C~89UY 2017 04 02.388235 12 42 19.90 +01 27 03.1 17DJ170 T09 C~89UY 2017 04 02.489938 12 42 19.43 +01 27 06.0 17DJ170 T09 C~89UY 2017 04 27.417363 12 40 30.02 +01 37 34.9 17DJ170 T09 C~89UY 2019 04 04.551811 12 52 45.20 +00 13 44.7 17DJ170 T09 C~89UY 2019 04 06.473958 12 52 36.40 +00 14 38.8 17DJ170 T09 C~89UY 2019 04 06.528515 12 52 36.14 +00 14 40.4 17DJ170 T09 C~89UY
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 -0.08
2 0.0001 -1.34 0.10 0.08 0.02
3 0.0007 -18.29 -0.08 -0.34 -0.08
4 0.8931 7943.64 0.07 -240.10 -0.03
5 0.8932 7941.41 -0.10 -239.86 0.06
6 0.8933 7940.87 -0.17 -239.76 0.13
7 0.8933 7939.71 0.07 -239.72 0.08
8 0.8934 7937.30 -0.02 -239.45 0.19
9 0.8988 7825.86 0.03 -231.26 -0.23
10 0.8988 7823.91 0.01 -230.91 0.01
11 0.8990 7820.24 0.13 -230.74 -0.07
12 1.0023 5189.84 -0.05 -166.77 -0.03
13 1.0026 5182.21 0.02 -166.89 0.01
14 1.0709 3425.87 0.01 -237.12 0.09
15 3.0069 15571.47 -0.15 -498.77 -0.12
16 3.0121 15428.03 0.13 -501.31 0.01
17 3.0123 15423.79 0.02 -501.39 0.05
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.
17DJ170 quality flag:1 Type: SCATNEAR CLASSICAL 7:4EEE axisobj 43.570 43.602 43.538 ecceobj 0.066 0.067 0.065 incobj 5.733 5.733 5.733 qmin 38.373 39.731 40.024 qmax 49.467 48.230 47.733 amean 43.754 43.813 43.726 amin 43.317 43.465 43.369 amax 44.199 44.195 44.112 emean 0.084 0.071 0.069 emin 0.050 0.053 0.056 emax 0.121 0.091 0.082 imean 3.925 4.058 3.862 imin 2.935 3.295 3.005 imax 4.829 4.802 4.703 excite_mean 0.109 0.101 0.097 fracstop 1.000 1.000 1.000 cjmean 3.084 3.087 3.087 libcent 0 -180.0 -180.0 182.3 libamp 0 -180.0 -180.0 139.9 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 183.4 183.4 186.4 kozaiamp 180.0 180.0 180.0