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: 17DN162
# Created Mon Apr 28 01:11:05 2025
# Orbit generated from Bernstein formalism
# Fitting 22 observations of 22
# Arc: 3.00y
# First observation: 2016/04/02
# Last observation: 2019/04/03
Preliminary a, adot, b, bdot, g, gdot:
-0.000012 0.020423 -0.000004 0.001161 0.021756 0.000000
# Chi-squared of fit: 7.52 DOF: 38 RMS: 0.10
# Min/Max residuals: -0.28 0.32
# Exact a, adot, b, bdot, g, gdot:
1.387037E-05 2.047605E-02 1.230930E-06 1.163696E-03 2.206864E-02 1.399113E-03
# Covariance matrix:
2.0524E-13 -6.2551E-13 1.1563E-14 -2.9945E-14 6.3651E-14 -9.0709E-12
-6.2551E-13 4.3448E-12 -9.3510E-14 2.2622E-13 -9.2106E-13 6.8407E-11
1.1563E-14 -9.3510E-14 1.2043E-13 -7.6180E-14 2.2813E-14 -1.5007E-12
-2.9945E-14 2.2622E-13 -7.6180E-14 1.1191E-13 -4.7500E-14 3.6493E-12
6.3651E-14 -9.2106E-13 2.2813E-14 -4.7500E-14 4.2061E-13 -1.4303E-11
-9.0709E-12 6.8407E-11 -1.5007E-12 3.6493E-12 -1.4303E-11 1.1037E-09
# lat0 lon0 xBary yBary zBary JD0
3.438416 -174.297455 -0.123291 0.059389 -0.986176 2457480.929068
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 67.71770 +/- 0.073
Argument of Peri: 330.25983 +/- 0.136
Long of Asc Node: 139.81956 +/- 0.008
Inclination: 4.66972 +/- 0.001
Eccentricity: 0.07445092 +/- 0.0017
Semi-Major Axis: 47.40762593 +/- 0.0251
Time of Perihelion: 2435053.5402 +/- 16.5
Perihelion: 43.87808444 +/- 0.0824
Aphelion: 50.93716742 +/- 0.0836
Period (y) 326.4228 +/- 0.26
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -45.98227824 +/- 0.0013
Ecliptic Y -4.71790949 +/- 0.0001
Ecliptic Z 2.71776970 +/- 0.0001
Ecliptic XDOT 0.00008873 +/- 0.0000
Ecliptic YDOT -0.00255104 +/- 0.0000
Ecliptic ZDOT 0.00015453 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 46.30350801 +/- 0.0013
Geocenter to KBO 45.31316571 +/- 0.0013
# Hcoef: 7.90
The following table shows the complete astrometric record for 17DN162. 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 (17DN162) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.428279 12 26 23.09 +00 53 32.3 17DN162 T09 C~81Bu 2016 04 02.444565 12 26 23.02 +00 53 32.8 17DN162 T09 C~81Bu 2016 04 04.37012 12 26 15.23 +00 54 23.3 24.7g 17DN162 T09 C~89UX 2016 04 04.37647 12 26 15.20 +00 54 23.6 25.0g 17DN162 T09 C~89UX 2016 04 04.41508 12 26 15.04 +00 54 24.6 25.4g 17DN162 T09 C~89UX 2016 04 04.45424 12 26 14.88 +00 54 25.6 24.9g 17DN162 T09 C~89UX 2016 04 04.52167 12 26 14.60 +00 54 27.5 24.8g 17DN162 T09 C~89UX 2016 06 05.320050 12 23 18.14 +01 11 07.7 17DN162 T09 C~81Bu 2016 06 05.345518 12 23 18.11 +01 11 07.8 17DN162 T09 C~81Bu 2017 01 23.630400 12 34 25.58 +00 02 24.6 17DN162 T09 C~81Bu 2017 01 30.62613 12 34 15.10 +00 04 08.3 24.2z 17DN162 T09 C~7zpm 2017 01 30.64832 12 34 15.05 +00 04 08.5 24.0z 17DN162 T09 C~7zpm 2017 01 30.65099 12 34 15.04 +00 04 08.5 23.6z 17DN162 T09 C~7zpm 2017 02 02.61286 12 34 09.51 +00 04 59.0 24.7i 17DN162 T09 C~7zpm 2017 02 02.63046 12 34 09.47 +00 04 59.2 24.1i 17DN162 T09 C~7zpm 2017 02 02.63889 12 34 09.45 +00 04 59.5 24.2i 17DN162 T09 C~7zpm 2017 02 02.65005 12 34 09.43 +00 04 59.5 24.1i 17DN162 T09 C~7zpm 2017 02 23.57406 12 33 14.11 +00 12 25.0 25.1r 17DN162 T09 C~7zpm 2017 02 23.60801 12 33 14.00 +00 12 26.0 24.7r 17DN162 T09 C~7zpm 2017 02 23.65038 12 33 13.83 +00 12 26.9 25.3r 17DN162 T09 C~7zpm 2019 04 03.448087 12 39 35.08 -00 18 49.7 17DN162 T09 C~81Bu 2019 04 03.472242 12 39 34.98 -00 18 49.0 17DN162 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 0.17 0.00 -0.08
2 0.0000 -1.16 0.10 0.04 -0.03
3 0.0053 -128.44 0.04 0.17 -0.07
4 0.0053 -128.98 -0.07 0.27 0.04
5 0.0054 -131.58 -0.08 0.23 0.02
6 0.0055 -134.18 -0.06 0.20 0.01
7 0.0057 -138.78 -0.16 0.29 0.12
8 0.1749 -2965.21 0.05 -128.50 -0.03
9 0.1750 -2965.67 0.01 -128.59 -0.01
10 0.8110 7864.03 0.08 49.21 0.02
11 0.8301 7678.35 0.12 82.18 0.08
12 0.8302 7677.58 0.05 82.07 -0.12
13 0.8302 7677.45 0.00 82.01 -0.19
14 0.8383 7581.15 -0.01 95.53 0.02
15 0.8383 7580.51 -0.02 95.47 -0.11
16 0.8384 7580.12 -0.12 95.63 0.02
17 0.8384 7579.84 -0.00 95.51 -0.15
18 0.8957 6640.34 0.11 175.91 0.15
19 0.8958 6638.42 0.08 176.17 0.32
20 0.8959 6635.72 -0.28 175.99 0.02
21 3.0007 12643.56 0.01 719.27 -0.04
22 3.0008 12641.90 -0.01 719.32 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.
17DN162 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.905 46.984 46.828 ecceobj 0.073 0.078 0.069 incobj 4.682 4.682 4.682 qmin 42.771 42.596 42.981 qmax 51.796 52.166 51.423 amean 47.139 47.219 47.061 amin 46.740 46.824 46.681 amax 47.552 47.634 47.469 emean 0.076 0.081 0.072 emin 0.064 0.069 0.059 emax 0.089 0.095 0.084 imean 3.620 3.615 3.624 imin 3.301 3.292 3.311 imax 3.927 3.922 3.931 excite_mean 0.099 0.103 0.096 fracstop 1.000 1.000 1.000 cjmean 3.129 3.129 3.129 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 175.6 175.5 175.9 kozaiamp 180.0 180.0 180.0