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: 23PW4
# Created Mon Apr 28 01:11:33 2025
# Orbit generated from Bernstein formalism
# Fitting 15 observations of 15
# Arc: 1.14y
# First observation: 2023/08/13
# Last observation: 2024/10/04
Preliminary a, adot, b, bdot, g, gdot:
-0.000004 0.008195 -0.000002 0.003164 0.013353 0.000000
# Chi-squared of fit: 9.82 DOF: 24 RMS: 0.14
# Min/Max residuals: -0.48 0.34
# Exact a, adot, b, bdot, g, gdot:
9.430731E-06 8.216126E-03 3.493063E-06 3.144432E-03 1.337197E-02 -7.078861E-03
# Covariance matrix:
6.9634E-13 -1.8140E-13 -7.7678E-14 1.1214E-12 1.3642E-12 3.0469E-10
-1.8140E-13 2.2413E-12 5.8779E-13 -7.7670E-12 -2.8677E-12 -2.1260E-09
-7.7678E-14 5.8779E-13 4.4837E-13 -2.9138E-12 -1.1871E-12 -7.3453E-10
1.1214E-12 -7.7670E-12 -2.9138E-12 3.6110E-11 1.5990E-11 9.7818E-09
1.3642E-12 -2.8677E-12 -1.1871E-12 1.5990E-11 8.9458E-12 4.3697E-09
3.0469E-10 -2.1260E-09 -7.3453E-10 9.7818E-09 4.3697E-09 2.6758E-06
# lat0 lon0 xBary yBary zBary JD0
5.921939 -24.488420 0.275208 0.099775 -0.964503 2460169.877161
# Heliocentric elements and errors
Epoch: 2460160.5000 = 2023/08/04
Mean Anomaly: 336.39783 +/- 14.629
Argument of Peri: 120.07747 +/- 2.997
Long of Asc Node: 320.38467 +/- 0.029
Inclination: 21.68305 +/- 0.038
Eccentricity: 0.69545518 +/- 0.1499
Semi-Major Axis: 121.90102782 +/- 49.1200
Time of Perihelion: 2492390.3967 +/- 4423.1
Perihelion: 37.12432608 +/- 23.6145
Aphelion: 206.67772957 +/- 85.2616
Period (y) 1345.9200 +/- 813.51
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 68.47015816 +/- 0.0151
Ecliptic Y -31.48284651 +/- 0.0069
Ecliptic Z 7.71596164 +/- 0.0018
Ecliptic XDOT -0.00067850 +/- 0.0003
Ecliptic YDOT 0.00216415 +/- 0.0001
Ecliptic ZDOT 0.00049085 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 75.75531827 +/- 0.0140
Geocenter to KBO 74.78329845 +/- 0.0167
# Hcoef: 5.96
The following table shows the complete astrometric record for 23PW4. 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 (23PW4) followed by the observatory code and reference code for the source of the astrometry.
2023 08 13.37636 22 20 34.742 -03 58 34.44 24.5r 23PW4 T09 C~8nlV 2023 08 13.56481 22 20 34.235 -03 58 36.76 24.7r 23PW4 T09 C~8nlV 2023 09 14.07467 22 19 10.938 -04 05 43.55 24.6r 23PW4 269 C~8nlV 2023 09 15.08177 22 19 08.389 -04 05 57.97 24.8r 23PW4 269 C~8nlV 2023 10 06.08949 22 18 20.239 -04 10 48.11 24.7r 23PW4 269 C~8nlV 2023 10 06.10005 22 18 20.221 -04 10 48.34 24.8r 23PW4 269 C~8nlV 2023 10 07.06598 22 18 18.313 -04 11 00.82 24.8r 23PW4 269 C~8nlV 2024 10 03.03284 22 19 54.638 -03 49 54.60 24.5r 23PW4 269 C~8nlV 2024 10 03.06449 22 19 54.552 -03 49 55.00 24.5r 23PW4 269 C~8nlV 2024 10 03.18863 22 19 54.274 -03 49 57.18 23PW4 G37 C~8nlV 2024 10 03.19603 22 19 54.240 -03 49 57.11 23PW4 G37 C~8nlV 2024 10 04.15203 22 19 52.299 -03 50 09.68 23PW4 G37 C~8nlV 2024 10 04.15949 22 19 52.264 -03 50 09.95 23PW4 G37 C~8nlV 2024 10 04.20423 22 19 52.177 -03 50 10.50 23PW4 G37 C~8nlV 2024 10 04.21159 22 19 52.165 -03 50 10.54 23PW4 G37 C~8nlV
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 0.05
2 0.0005 -7.91 -0.08 0.59 0.02
3 0.0868 -1324.21 0.01 54.87 -0.04
4 0.0895 -1364.99 0.06 55.26 -0.05
5 0.1471 -2141.59 -0.06 45.85 0.10
6 0.1471 -2141.92 -0.05 45.73 -0.00
7 0.1497 -2173.05 0.06 44.44 -0.08
8 1.1407 -370.70 0.34 702.15 -0.04
9 1.1408 -372.04 0.09 702.25 0.09
10 1.1412 -376.71 -0.28 701.73 -0.18
11 1.1412 -377.16 -0.48 701.98 0.08
12 1.1438 -408.79 0.25 700.80 0.04
13 1.1438 -409.37 -0.08 700.74 -0.01
14 1.1440 -410.79 0.04 700.70 -0.01
15 1.1440 -410.97 0.11 700.72 0.03
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.
23PW4 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0