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: 24PL17 # Created Tue Sep 30 01:12:21 2025 # Orbit generated from Bernstein formalism # Fitting 36 observations of 36 # Arc: 1.95y # First observation: 2023/10/05 # Last observation: 2025/09/16 Preliminary a, adot, b, bdot, g, gdot: 0.011112 -0.219654 -0.009894 0.066137 0.147649 0.000000 # Chi-squared of fit: 11.49 DOF: 66 RMS: 0.10 # Min/Max residuals: -0.35 0.28 # Exact a, adot, b, bdot, g, gdot: -2.731135E-05 -1.461533E-01 7.729602E-06 4.590274E-02 8.577500E-02 -1.404005E-01 # Covariance matrix: 3.0999E-13 -5.0728E-13 -6.2515E-14 1.3824E-13 1.7400E-13 8.8459E-13 -5.0728E-13 1.9749E-12 2.9890E-13 -6.1344E-13 -1.3259E-12 -3.9790E-12 -6.2515E-14 2.9890E-13 2.2990E-13 -2.0098E-13 -2.0948E-13 -6.2347E-13 1.3824E-13 -6.1344E-13 -2.0098E-13 2.6848E-13 4.0486E-13 1.2901E-12 1.7400E-13 -1.3259E-12 -2.0948E-13 4.0486E-13 1.1899E-12 2.6565E-12 8.8459E-13 -3.9790E-12 -6.2347E-13 1.2901E-12 2.6565E-12 8.3550E-12 # lat0 lon0 xBary yBary zBary JD0 -35.915922 3.564245 -0.137995 -0.576139 -0.795092 2460222.928375 # Heliocentric elements and errors Epoch: 2460220.5000 = 2023/10/03 Mean Anomaly: 357.72400 +/- 0.002 Argument of Peri: 26.21749 +/- 0.001 Long of Asc Node: 307.20257 +/- 0.000 Inclination: 142.03012 +/- 0.000 Eccentricity: 0.92218788 +/- 0.0000 Semi-Major Axis: 84.45150619 +/- 0.0481 Time of Perihelion: 2462012.6699 +/- 0.0 Perihelion: 6.57135035 +/- 0.0053 Aphelion: 162.33166203 +/- 0.0926 Period (y) 776.1029 +/- 0.66 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 10.40347969 +/- 0.0001 Ecliptic Y 0.78769029 +/- 0.0000 Ecliptic Z -6.83872955 +/- 0.0001 Ecliptic XDOT -0.00247864 +/- 0.0000 Ecliptic YDOT -0.00482041 +/- 0.0000 Ecliptic ZDOT 0.00381544 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 12.47481733 +/- 0.0001 Geocenter to KBO 11.65840913 +/- 0.0001 # Hcoef: 10.75
The following table shows the complete astrometric record for 24PL17. 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 (24PL17) followed by the observatory code and reference code for the source of the astrometry.
2023 10 05.427574 01 16 18.311 -31 12 33.33 21.8w 24PL17 F51 C~8Hfg 2023 10 05.438528 01 16 18.020 -31 12 35.17 21.9w 24PL17 F51 C~8Hfg 2023 10 05.449485 01 16 17.665 -31 12 36.39 21.6w 24PL17 F51 C~8Hfg 2023 10 05.460442 01 16 17.370 -31 12 37.62 21.6w 24PL17 F51 C~8Hfg 2024 08 15.501591 00 54 20.061 -29 55 40.18 21.4w 24PL17 F51 C~8Hfg 2024 08 15.511285 00 54 19.840 -29 55 42.43 21.3w 24PL17 F51 C~8Hfg 2024 08 15.520962 00 54 19.615 -29 55 44.46 21.2w 24PL17 F51 C~8Hfg 2024 08 15.530639 00 54 19.387 -29 55 46.98 21.4w 24PL17 F51 C~8Hfg 2024 09 01.504431 00 46 54.418 -30 59 09.81 21.1G 24PL17 F51 C~8Hfg 2024 09 07.480050 00 43 54.260 -31 19 42.33 21.2w 24PL17 F51 C~8Hfg 2024 09 07.491588 00 43 53.884 -31 19 44.48 21.4w 24PL17 F51 C~8Hfg 2024 09 07.503198 00 43 53.525 -31 19 46.75 21.4w 24PL17 F51 C~8Hfg 2024 09 07.568280 00 43 51.508 -31 19 59.66 21.7G 24PL17 F51 C~8Hfg 2024 09 07.568925 00 43 51.471 -31 19 59.86 21.8G 24PL17 F51 C~8Hfg 2024 09 08.468747 00 43 23.470 -31 22 58.20 21.7G 24PL17 T12 C~8Hfg 2024 09 08.469827 00 43 23.433 -31 22 58.46 21.9G 24PL17 T12 C~8Hfg 2025 07 25.583303 00 06 40.585 -29 03 58.02 20.8w 24PL17 F51 C~91bO 2025 07 25.589832 00 06 40.435 -29 03 59.58 20.9w 24PL17 F51 C~91bO 2025 07 25.596346 00 06 40.255 -29 04 00.98 20.8w 24PL17 F51 C~91bO 2025 08 18.505696 23 54 29.793 -30 37 09.88 21.0w 24PL17 F51 C~953s 2025 08 18.515450 23 54 29.440 -30 37 11.98 21.1w 24PL17 F51 C~953s 2025 08 18.525211 23 54 29.080 -30 37 14.31 20.8w 24PL17 F51 C~953s 2025 08 18.534973 23 54 28.734 -30 37 16.50 20.8w 24PL17 F51 C~953s 2025 08 26.443083 23 49 33.142 -31 05 42.85 20.9w 24PL17 F51 C~953s 2025 08 26.455003 23 49 32.683 -31 05 45.34 20.9w 24PL17 F51 C~953s 2025 08 26.466906 23 49 32.211 -31 05 47.74 20.8w 24PL17 F51 C~953s 2025 09 02.466839 23 44 53.976 -31 28 44.00 20.5w 24PL17 F51 C~953s 2025 09 02.477463 23 44 53.549 -31 28 46.10 20.4w 24PL17 F51 C~953s 2025 09 02.488084 23 44 53.115 -31 28 48.11 20.7w 24PL17 F51 C~953s 2025 09 10.401866 23 39 25.321 -31 51 27.91 20.1i 24PL17 F51 C~953s 2025 09 10.410999 23 39 24.943 -31 51 29.39 20.0i 24PL17 F51 C~953s 2025 09 10.420111 23 39 24.550 -31 51 30.77 20.1i 24PL17 F51 C~953s 2025 09 16.379398 23 35 12.172 -32 05 53.99 20.6w 24PL17 F51 C~98UW 2025 09 16.390962 23 35 11.676 -32 05 55.51 20.5w 24PL17 F51 C~98UW 2025 09 16.402506 23 35 11.172 -32 05 57.08 20.5w 24PL17 F51 C~98UW 2025 09 16.414074 23 35 10.681 -32 05 58.55 20.5w 24PL17 F51 C~98UW
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 0.15
2 0.0000 -4.16 0.15 0.10 -0.35
3 0.0001 -8.76 -0.21 1.14 0.07
4 0.0001 -12.68 0.11 1.80 0.12
5 0.8626 -13260.37 -0.13 11694.27 -0.01
6 0.8627 -13263.94 -0.07 11693.44 -0.04
7 0.8627 -13267.47 0.03 11692.83 0.16
8 0.8627 -13271.24 -0.12 11691.79 -0.08
9 0.9092 -20133.68 -0.04 10608.97 -0.04
10 0.9255 -22777.59 -0.04 10413.12 -0.09
11 0.9256 -22782.94 -0.14 10413.08 0.12
12 0.9256 -22788.13 -0.06 10412.84 0.13
13 0.9258 -22817.36 0.28 10411.35 0.01
14 0.9258 -22817.88 0.05 10411.35 0.03
15 0.9282 -23223.31 0.02 10391.14 -0.05
16 0.9282 -23223.85 -0.03 10391.09 -0.08
17 1.8047 -47849.41 -0.02 29094.91 -0.09
18 1.8047 -47851.91 0.16 29094.07 -0.18
19 1.8047 -47854.75 -0.02 29093.52 0.01
20 1.8702 -59402.55 0.04 26780.26 0.02
21 1.8702 -59407.96 0.09 26779.65 0.10
22 1.8702 -59413.54 -0.02 26778.84 -0.03
23 1.8702 -59418.89 0.10 26778.10 -0.08
24 1.8919 -63947.59 -0.02 26286.70 -0.03
25 1.8919 -63954.59 0.08 26286.05 -0.08
26 1.8920 -63961.75 0.03 26285.55 0.01
27 1.9111 -68182.88 -0.07 26002.47 0.10
28 1.9112 -68189.38 0.03 26002.01 -0.06
29 1.9112 -68195.94 0.06 26001.67 -0.11
30 1.9329 -73135.95 -0.16 25872.97 0.12
31 1.9329 -73141.65 -0.03 25872.88 0.04
32 1.9329 -73147.54 -0.09 25872.94 0.12
33 1.9492 -76937.35 -0.00 25919.94 0.00
34 1.9492 -76944.78 0.03 25920.18 0.02
35 1.9493 -76952.35 -0.09 25920.40 0.01
36 1.9493 -76959.70 0.03 25920.67 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.
24PL17 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 83.209 83.253 83.164 ecceobj 0.922 0.922 0.922 incobj 142.039 142.039 142.039 qmin 6.361 6.375 6.387 qmax 226.545 174.595 168.567 amean 99.538 82.657 81.506 amin 83.209 76.047 73.634 amax 117.130 91.136 88.052 emean 0.928 0.914 0.912 emin 0.919 0.906 0.900 emax 0.937 0.923 0.924 imean 140.228 141.369 140.931 imin 136.155 137.609 137.116 imax 144.028 144.104 144.014 excite_mean 1.127 1.107 1.108 fracstop 0.085 0.063 0.059 cjmean -0.737 -0.688 -0.685 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 31.4 32.8 32.6 kozaiamp 4.2 4.9 5.0