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: 17DN171
# Created Sun Nov 24 02:10:50 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 21 observations of 21
# Arc: 5.99y
# First observation: 2013/04/05
# Last observation: 2019/04/03
# Chi-squared of fit: 13.71 DOF: 36 RMS: 0.14
# Min/Max residuals: -0.29 0.45
# Exact a, adot, b, bdot, g, gdot:
1.672536E-05 2.523801E-02 -7.010722E-06 -8.510779E-03 2.586029E-02 1.620279E-03
# Covariance matrix:
4.7905E-13 -2.1917E-13 -2.0287E-14 3.6620E-14 -5.5046E-14 -9.1076E-13
-2.1917E-13 2.5941E-13 3.8900E-14 -7.0415E-14 2.1489E-15 1.7476E-12
-2.0287E-14 3.8900E-14 4.2614E-13 -1.1921E-13 1.3600E-14 3.1060E-13
3.6620E-14 -7.0415E-14 -1.1921E-13 5.5222E-14 -2.3245E-14 -5.6112E-13
-5.5046E-14 2.1489E-15 1.3600E-14 -2.3245E-14 7.1649E-13 6.0203E-13
-9.1076E-13 1.7476E-12 3.1060E-13 -5.6112E-13 6.0203E-13 1.3947E-11
# lat0 lon0 xBary yBary zBary JD0
5.774673 -176.191275 -0.205396 0.098706 -0.975626 2456387.832533
# Heliocentric elements and errors
Epoch: 2456388.5000 = 2013/04/06
Mean Anomaly: 40.82310 +/- 0.052
Argument of Peri: 114.07458 +/- 0.068
Long of Asc Node: 20.29326 +/- 0.000
Inclination: 19.47814 +/- 0.000
Eccentricity: 0.09720261 +/- 0.0001
Semi-Major Axis: 42.58492321 +/- 0.0065
Time of Perihelion: 2444878.2238 +/- 15.0
Perihelion: 38.44555771 +/- 0.0086
Aphelion: 46.72428871 +/- 0.0095
Period (y) 277.9022 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -39.35220534 +/- 0.0013
Ecliptic Y -2.82379779 +/- 0.0001
Ecliptic Z 3.89051712 +/- 0.0001
Ecliptic XDOT -0.00008956 +/- 0.0000
Ecliptic YDOT -0.00268303 +/- 0.0000
Ecliptic ZDOT -0.00087907 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.64470461 +/- 0.0012
Geocenter to KBO 38.66933021 +/- 0.0013
# Hcoef: 7.67
The following table shows the complete astrometric record for 17DN171. 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 (17DN171) followed by the observatory code and reference code for the source of the astrometry.
2013 04 05.331755 12 23 09.54 +03 47 08.6 17DN171 T14 C~89Ua 2013 04 05.334260 12 23 09.53 +03 47 08.1 17DN171 T14 C~89Ua 2013 04 05.336002 12 23 09.54 +03 47 08.0 17DN171 T14 C~89Ua 2016 04 04.459918 12 36 44.90 +00 43 19.0 17DN171 T09 C~89Ua 2016 04 04.48066 12 36 44.79 +00 43 19.4 24.5g 17DN171 T09 C~8COu 2016 04 04.52590 12 36 44.58 +00 43 20.6 24.7g 17DN171 T09 C~8COu 2016 04 04.555772 12 36 44.43 +00 43 21.3 17DN171 T09 C~89Ua 2017 02 21.48870 12 44 22.22 -00 35 12.7 23.7z 17DN171 T09 C~89Ua 2017 02 21.49884 12 44 22.20 -00 35 12.5 23.4z 17DN171 T09 C~89Ua 2017 02 21.53656 12 44 22.04 -00 35 11.7 23.9z 17DN171 T09 C~89Ua 2017 02 21.56614 12 44 21.94 -00 35 11.1 23.0z 17DN171 T09 C~89Ua 2017 02 21.58766 12 44 21.88 -00 35 10.5 23.6z 17DN171 T09 C~89Ua 2017 02 21.60643 12 44 21.79 -00 35 10.1 23.1z 17DN171 T09 C~89Ua 2017 02 23.54421 12 44 14.73 -00 34 27.5 23.8r 17DN171 T09 C~89Ua 2017 02 23.56973 12 44 14.63 -00 34 27.0 23.9r 17DN171 T09 C~89Ua 2017 02 23.61219 12 44 14.46 -00 34 26.1 23.2r 17DN171 T09 C~89Ua 2017 02 23.64192 12 44 14.36 -00 34 25.6 23.9r 17DN171 T09 C~89Ua 2017 03 03.246632 12 43 44.446 -00 31 27.30 23.8g 17DN171 W84 C~8HKW 2017 03 03.272194 12 43 44.321 -00 31 26.76 22.9r 17DN171 W84 C~8HKW 2017 04 27.380876 12 39 28.78 -00 08 59.1 17DN171 T09 C~89Ua 2019 04 03.469560 12 50 16.59 -02 19 09.4 17DN171 T09 C~89Ua
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 0.45
2 0.0000 0.00 -0.06 0.00 -0.11
3 0.0000 0.00 0.22 0.00 -0.25
4 2.9983 0.00 -0.06 0.00 -0.03
5 2.9984 0.00 -0.17 0.00 -0.15
6 2.9985 0.00 0.02 0.00 -0.08
7 2.9986 0.00 -0.03 0.00 -0.13
8 3.8827 0.00 -0.06 0.00 0.13
9 3.8827 0.00 0.20 0.00 0.11
10 3.8828 0.00 -0.13 0.00 0.09
11 3.8829 0.00 0.00 0.00 0.05
12 3.8830 0.00 0.29 0.00 0.18
13 3.8830 0.00 -0.03 0.00 0.17
14 3.8883 0.00 0.07 0.00 0.05
15 3.8884 0.00 0.03 0.00 -0.02
16 3.8885 0.00 -0.11 0.00 -0.07
17 3.8886 0.00 0.08 0.00 -0.24
18 3.9094 0.00 -0.03 0.00 0.01
19 3.9095 0.00 -0.29 0.00 -0.07
20 4.0604 0.00 0.01 0.00 0.01
21 5.9935 0.00 0.01 0.00 -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.