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: 04PW117 # Created Wed Dec 25 02:08:37 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 24 observations of 24 # Arc: 16.90y # First observation: 2004/08/15 # Last observation: 2021/07/09 # Chi-squared of fit: 22.75 DOF: 42 RMS: 0.17 # Min/Max residuals: -0.36 0.33 # Exact a, adot, b, bdot, g, gdot: 1.436362E-05 2.002880E-02 1.375194E-06 -4.327050E-04 2.222468E-02 4.372951E-04 # Covariance matrix: 1.5413E-13 -4.2180E-14 -8.7056E-16 7.2233E-16 -2.3953E-14 -9.7908E-14 -4.2180E-14 2.6480E-14 6.4899E-16 -5.3566E-16 1.7141E-14 7.2618E-14 -8.7056E-16 6.4899E-16 1.0869E-13 -8.4877E-15 -5.7611E-16 1.9132E-15 7.2233E-16 -5.3566E-16 -8.4877E-15 1.4965E-15 -3.5728E-16 -1.5566E-15 -2.3953E-14 1.7141E-14 -5.7611E-16 -3.5728E-16 1.9570E-13 4.4821E-14 -9.7908E-14 7.2618E-14 1.9132E-15 -1.5566E-15 4.4821E-14 2.1112E-13 # lat0 lon0 xBary yBary zBary JD0 -1.428691 -50.293335 -0.231441 -0.024628 -0.989821 2453232.847393 # Heliocentric elements and errors Epoch: 2453232.5000 = 2004/08/15 Mean Anomaly: 152.05130 +/- 0.034 Argument of Peri: 73.39944 +/- 0.028 Long of Asc Node: 81.33491 +/- 0.003 Inclination: 1.86165 +/- 0.000 Eccentricity: 0.06428126 +/- 0.0000 Semi-Major Axis: 43.47668113 +/- 0.0031 Time of Perihelion: 2409007.2164 +/- 11.0 Perihelion: 40.68194517 +/- 0.0036 Aphelion: 46.27141709 +/- 0.0039 Period (y) 286.6770 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 29.54345092 +/- 0.0006 Ecliptic Y -35.21721821 +/- 0.0007 Ecliptic Z -1.12175819 +/- 0.0000 Ecliptic XDOT 0.00192982 +/- 0.0000 Ecliptic YDOT 0.00152887 +/- 0.0000 Ecliptic ZDOT -0.00005452 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.98178571 +/- 0.0006 Geocenter to KBO 44.99504326 +/- 0.0009 # Hcoef: 6.24
The following table shows the complete astrometric record for 04PW117. 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 (04PW117) followed by the observatory code and reference code for the source of the astrometry.
2004 08 15.34665 20 50 12.48 -19 11 45.5 23.2g 04PW117 568 C~0VDs 2004 08 15.37789 20 50 12.33 -19 11 45.9 23.2g 04PW117 568 C~0VDs 2004 08 15.40976 20 50 12.20 -19 11 46.4 22.9g 04PW117 568 C~0VDs 2004 08 16.31716 20 50 08.23 -19 12 02.0 23.0g 04PW117 568 C~0VDs 2004 10 04.25118 20 47 28.84 -19 21 40.2 22.8i 04PW117 568 C~0VDs 2004 10 04.30342 20 47 28.74 -19 21 40.4 22.5i 04PW117 568 C~0VDs 2004 10 04.35551 20 47 28.65 -19 21 40.7 22.7i 04PW117 568 C~0VDs 2006 07 20.43163 21 01 31.26 -18 28 28.2 04PW117 568 C~0VDs 2006 07 20.45812 21 01 31.13 -18 28 28.7 23.3r 04PW117 568 C~0VDs 2006 07 20.48451 21 01 31.02 -18 28 29.3 23.1r 04PW117 568 C~0VDs 2006 07 26.36959 21 01 05.48 -18 30 20.6 22.9r 04PW117 568 C~0VDs 2006 07 26.39553 21 01 05.37 -18 30 21.0 23.0r 04PW117 568 C~0VDs 2006 07 26.42148 21 01 05.25 -18 30 21.5 22.8r 04PW117 568 C~0VDs 2006 10 21.91619 20 56 26.57 -18 48 23.5 04PW117 950 C~0VDs 2008 06 07.31922 21 13 04.37 -17 40 18.5 04PW117 807 C~0VDs 2008 06 07.39576 21 13 04.21 -17 40 19.2 04PW117 807 C~0VDs 2013 10 05.14698 21 28 42.99 -16 35 23.0 22.3R 04PW117 695 C~0zda 2013 10 05.26521 21 28 42.71 -16 35 23.9 04PW117 695 C~0zda 2013 10 06.16468 21 28 40.62 -16 35 32.3 04PW117 695 C~0zda 2020 09 13.33095 22 01 01.668 -13 59 49.75 22.8w 04PW117 F51 C~47v9 2020 09 13.34362 22 01 01.592 -13 59 49.99 23.0w 04PW117 F51 C~47v9 2020 09 13.36896 22 01 01.518 -13 59 50.81 23.0w 04PW117 F51 C~47v9 2021 07 09.336640 22 09 44.558 -13 12 49.06 22.8G 04PW117 G37 C~4uo0 2021 07 09.428140 22 09 44.276 -13 12 50.33 04PW117 G37 C~4uo0
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 0.08 0.00 -0.34
2 0.0001 0.00 -0.08 0.00 -0.20
3 0.0002 0.00 0.10 0.00 -0.16
4 0.0027 0.00 -0.06 0.00 -0.29
5 0.1366 0.00 0.31 0.00 -0.00
6 0.1368 0.00 0.17 0.00 0.05
7 0.1369 0.00 0.17 0.00 0.00
8 1.9277 0.00 -0.14 0.00 0.21
9 1.9278 0.00 -0.36 0.00 0.21
10 1.9278 0.00 -0.29 0.00 0.10
11 1.9439 0.00 -0.07 0.00 -0.02
12 1.9440 0.00 0.02 0.00 0.08
13 1.9441 0.00 -0.04 0.00 0.08
14 2.1836 0.00 -0.21 0.00 0.06
15 3.8110 0.00 0.33 0.00 0.04
16 3.8112 0.00 0.16 0.00 0.13
17 9.1384 0.00 -0.02 0.00 -0.01
18 9.1387 0.00 0.07 0.00 0.20
19 9.1412 0.00 -0.15 0.00 0.21
20 16.0794 0.00 0.13 0.00 0.01
21 16.0794 0.00 -0.26 0.00 0.02
22 16.0795 0.00 0.14 0.00 -0.29
23 16.8980 0.00 0.12 0.00 -0.23
24 16.8982 0.00 -0.09 0.00 0.12
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.
04PW117 quality flag:2 Type: SCATNEAR CLASSICAL SCATNEAR axisobj 43.657 43.657 43.657 ecceobj 0.058 0.058 0.058 incobj 1.865 1.865 1.865 qmin 38.128 38.109 38.089 qmax 49.802 49.831 49.829 amean 43.695 43.712 43.711 amin 43.305 43.308 43.309 amax 44.180 44.172 44.197 emean 0.083 0.085 0.084 emin 0.044 0.044 0.044 emax 0.128 0.128 0.128 imean 0.877 0.882 0.869 imin 0.624 0.624 0.623 imax 1.203 1.203 1.207 excite_mean 0.085 0.086 0.086 fracstop 1.000 1.000 1.000 cjmean 3.088 3.088 3.089 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 184.7 185.2 184.4 kozaiamp 180.0 180.0 180.0