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: 17DJ171 # Created Sun Nov 24 02:10:50 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 25 observations of 25 # Arc: 17.05y # First observation: 2002/03/20 # Last observation: 2019/04/06 # Chi-squared of fit: 10.26 DOF: 44 RMS: 0.11 # Min/Max residuals: -0.32 0.31 # Exact a, adot, b, bdot, g, gdot: 1.582006E-05 2.488689E-02 3.719637E-06 5.789657E-03 2.528567E-02 -3.097331E-03 # Covariance matrix: 4.8852E-13 -5.7403E-14 4.2692E-15 -6.1656E-15 -2.2317E-14 -5.9995E-14 -5.7403E-14 4.4444E-14 -6.7757E-15 9.8043E-15 3.4656E-15 9.5511E-14 4.2692E-15 -6.7757E-15 4.7180E-13 -3.2516E-14 -8.6915E-16 -1.5343E-14 -6.1656E-15 9.8043E-15 -3.2516E-14 4.5388E-15 1.0601E-15 2.2199E-14 -2.2317E-14 3.4656E-15 -8.6915E-16 1.0601E-15 3.3652E-13 9.1861E-15 -5.9995E-14 9.5511E-14 -1.5343E-14 2.2199E-14 9.1861E-15 2.1626E-13 # lat0 lon0 xBary yBary zBary JD0 -1.135240 167.834236 -0.206490 -0.019385 -0.974920 2452353.794788 # Heliocentric elements and errors Epoch: 2452354.5000 = 2002/03/21 Mean Anomaly: 306.54842 +/- 0.022 Argument of Peri: 61.67428 +/- 0.029 Long of Asc Node: 172.87124 +/- 0.000 Inclination: 13.13742 +/- 0.000 Eccentricity: 0.12975096 +/- 0.0000 Semi-Major Axis: 43.34569074 +/- 0.0044 Time of Perihelion: 2467831.0917 +/- 14.9 Perihelion: 37.72154584 +/- 0.0041 Aphelion: 48.96983565 +/- 0.0052 Period (y) 285.3823 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -39.64831478 +/- 0.0009 Ecliptic Y 8.34132353 +/- 0.0002 Ecliptic Z -0.78339355 +/- 0.0000 Ecliptic XDOT -0.00026066 +/- 0.0000 Ecliptic YDOT -0.00270336 +/- 0.0000 Ecliptic ZDOT 0.00063362 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.52389463 +/- 0.0009 Geocenter to KBO 39.54819304 +/- 0.0009 # Hcoef: 8.28
The following table shows the complete astrometric record for 17DJ171. 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 (17DJ171) followed by the observatory code and reference code for the source of the astrometry.
2002 03 20.294045 11 13 28.27 +03 45 47.7 17DJ171 T14 C~89Ua 2002 03 20.328210 11 13 28.12 +03 45 48.9 17DJ171 T14 C~89Ua 2002 03 20.363013 11 13 27.96 +03 45 49.8 17DJ171 T14 C~89Ua 2016 04 04.442534 12 36 20.52 +00 05 34.5 17DJ171 T09 C~89Ua 2016 04 04.44255 12 36 20.51 +00 05 34.4 25.4g 17DJ171 T09 C~8COu 2016 04 04.48066 12 36 20.33 +00 05 35.8 25.5g 17DJ171 T09 C~8COu 2016 04 04.51309 12 36 20.16 +00 05 36.8 25.7g 17DJ171 T09 C~8COu 2016 04 04.515201 12 36 20.17 +00 05 36.9 17DJ171 T09 C~89Ua 2017 02 21.53656 12 45 36.54 -00 35 08.9 23.8z 17DJ171 T09 C~89Ua 2017 02 21.53924 12 45 36.53 -00 35 08.9 23.5z 17DJ171 T09 C~89Ua 2017 02 21.56076 12 45 36.45 -00 35 08.4 23.7z 17DJ171 T09 C~89Ua 2017 02 21.56614 12 45 36.43 -00 35 08.1 23.5z 17DJ171 T09 C~89Ua 2017 02 21.58766 12 45 36.38 -00 35 07.6 23.9z 17DJ171 T09 C~89Ua 2017 02 21.60643 12 45 36.29 -00 35 07.3 23.8z 17DJ171 T09 C~89Ua 2017 02 21.60910 12 45 36.28 -00 35 06.8 23.3z 17DJ171 T09 C~89Ua 2017 02 23.54421 12 45 29.62 -00 34 08.8 24.2r 17DJ171 T09 C~89Ua 2017 02 23.56973 12 45 29.53 -00 34 08.1 24.7r 17DJ171 T09 C~89Ua 2017 02 23.61219 12 45 29.38 -00 34 06.9 23.9r 17DJ171 T09 C~89Ua 2017 02 23.64192 12 45 29.27 -00 34 05.9 24.0r 17DJ171 T09 C~89Ua 2017 02 23.64401 12 45 29.26 -00 34 06.1 24.1r 17DJ171 T09 C~89Ua 2017 04 27.380876 12 40 53.66 -00 00 19.4 17DJ171 T09 C~89Ua 2019 04 06.350099 12 55 04.86 -00 46 12.7 17DJ171 T09 C~89Ua 2019 04 06.44937 12 55 04.36 -00 46 09.3 23.6i 17DJ171 T09 C~8COu 2019 04 06.47397 12 55 04.25 -00 46 08.7 23.7i 17DJ171 T09 C~8COu 2019 04 06.515104 12 55 04.06 -00 46 07.2 17DJ171 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 -0.06 0.00 0.00
2 0.0001 0.00 0.03 0.00 0.10
3 0.0002 0.00 0.01 0.00 -0.13
4 14.0428 0.00 0.07 0.00 0.03
5 14.0428 0.00 -0.07 0.00 -0.07
6 14.0429 0.00 -0.05 0.00 0.07
7 14.0430 0.00 -0.28 0.00 -0.01
8 14.0430 0.00 0.02 0.00 0.02
9 14.9274 0.00 0.05 0.00 0.15
10 14.9274 0.00 0.04 0.00 0.07
11 14.9275 0.00 -0.04 0.00 -0.06
12 14.9275 0.00 -0.06 0.00 0.08
13 14.9276 0.00 0.31 0.00 -0.06
14 14.9276 0.00 -0.07 0.00 -0.32
15 14.9276 0.00 -0.08 0.00 0.10
16 14.9329 0.00 -0.02 0.00 0.20
17 14.9330 0.00 0.01 0.00 0.13
18 14.9331 0.00 0.05 0.00 0.04
19 14.9332 0.00 0.00 0.00 0.14
20 14.9332 0.00 -0.03 0.00 -0.12
21 15.1050 0.00 0.16 0.00 -0.08
22 17.0460 0.00 0.09 0.00 -0.05
23 17.0463 0.00 -0.22 0.00 0.05
24 17.0464 0.00 -0.08 0.00 -0.17
25 17.0465 0.00 0.04 0.00 -0.04
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.