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: 22QD261
# Created Wed Dec 25 02:11:19 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 12 observations of 12
# Arc: 5.96y
# First observation: 2017/09/22
# Last observation: 2023/09/06
# Chi-squared of fit: 7.50 DOF: 18 RMS: 0.14
# Min/Max residuals: -0.27 0.40
# Exact a, adot, b, bdot, g, gdot:
1.230561E-05 1.476497E-02 1.041817E-06 9.675310E-04 1.884851E-02 -7.867281E-04
# Covariance matrix:
1.4658E-12 -5.4379E-13 1.3500E-14 -1.9928E-14 -3.5821E-13 -3.3576E-12
-5.4379E-13 4.4590E-13 -1.6908E-14 2.5076E-14 3.8796E-13 4.2389E-12
1.3500E-14 -1.6908E-14 1.2165E-12 -2.3454E-13 -1.8556E-14 -1.8228E-13
-1.9928E-14 2.5076E-14 -2.3454E-13 5.1387E-14 2.6782E-14 2.6984E-13
-3.5821E-13 3.8796E-13 -1.8556E-14 2.6782E-14 8.0727E-13 4.4400E-12
-3.3576E-12 4.2389E-12 -1.8228E-13 2.6984E-13 4.4400E-12 4.5555E-11
# lat0 lon0 xBary yBary zBary JD0
2.702800 -33.032322 -0.537747 0.040241 -0.849342 2458018.516133
# Heliocentric elements and errors
Epoch: 2458018.5000 = 2017/09/22
Mean Anomaly: 196.29910 +/- 0.139
Argument of Peri: 203.74860 +/- 0.135
Long of Asc Node: 291.94444 +/- 0.007
Inclination: 4.56431 +/- 0.001
Eccentricity: 0.16279170 +/- 0.0001
Semi-Major Axis: 46.55517317 +/- 0.0063
Time of Perihelion: 2510777.7866 +/- 46.6
Perihelion: 38.97637755 +/- 0.0072
Aphelion: 54.13396878 +/- 0.0088
Period (y) 317.6582 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 45.43353252 +/- 0.0021
Ecliptic Y -28.90624948 +/- 0.0014
Ecliptic Z 2.50184661 +/- 0.0001
Ecliptic XDOT 0.00107285 +/- 0.0000
Ecliptic YDOT 0.00185826 +/- 0.0000
Ecliptic ZDOT 0.00013488 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 53.90769153 +/- 0.0019
Geocenter to KBO 53.05467145 +/- 0.0025
# Hcoef: 5.95
The following table shows the complete astrometric record for 22QD261. 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 (22QD261) followed by the observatory code and reference code for the source of the astrometry.
2017 09 22.015332 21 52 58.65 -09 58 52.9 22.9r 22QD261 W84 C~79O0 2021 07 16.165794 22 09 29.99 -08 15 42.1 22.8i 22QD261 W84 C~79O0 2021 08 17.130409 22 07 43.46 -08 24 36.9 22.6i 22QD261 W84 C~79O0 2022 08 30.10253 22 10 07.057 -08 07 43.90 23.6r 22QD261 807 C~6wt2 2022 08 31.11133 22 10 03.371 -08 08 04.30 23.4r 22QD261 807 C~6wt2 2022 10 15.03490 22 07 46.873 -08 21 40.68 23.2r 22QD261 304 C~6wt2 2022 10 16.01916 22 07 44.868 -08 21 54.06 23.1r 22QD261 304 C~6wt2 2022 10 21.01020 22 07 35.594 -08 22 57.91 23.3r 22QD261 304 C~6wt2 2023 06 23.30048 22 16 38.543 -07 29 57.24 23.0r 22QD261 304 C~6wt2 2023 06 24.41333 22 16 36.854 -07 30 02.80 23.1r 22QD261 304 C~6wt2 2023 09 06.141580 22 12 52.508 -07 48 49.70 23.5G 22QD261 G37 C~7Bo7 2023 09 06.225900 22 12 52.201 -07 48 51.56 22QD261 G37 C~7Bo7
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 0.03 0.00 -0.04
2 3.8142 0.00 -0.13 0.00 0.07
3 3.9018 0.00 -0.22 0.00 0.07
4 4.9366 0.00 0.40 0.00 -0.10
5 4.9393 0.00 0.31 0.00 -0.02
6 5.0623 0.00 0.02 0.00 -0.04
7 5.0650 0.00 -0.05 0.00 0.03
8 5.0787 0.00 -0.27 0.00 0.04
9 5.7503 0.00 -0.06 0.00 0.06
10 5.7533 0.00 -0.04 0.00 -0.07
11 5.9552 0.00 -0.04 0.00 0.05
12 5.9554 0.00 -0.06 0.00 -0.09
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.
22QD261 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.666 46.666 46.666 ecceobj 0.161 0.161 0.161 incobj 4.578 4.578 4.578 qmin 38.146 38.179 38.188 qmax 55.531 55.597 55.552 amean 46.650 46.644 46.647 amin 46.244 46.235 46.243 amax 47.112 47.139 47.127 emean 0.165 0.165 0.165 emin 0.152 0.152 0.152 emax 0.179 0.179 0.180 imean 6.085 6.079 6.079 imin 5.533 5.526 5.525 imax 6.634 6.634 6.634 excite_mean 0.196 0.196 0.196 fracstop 1.000 1.000 1.000 cjmean 3.086 3.086 3.086 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 181.4 181.4 181.4 kozaiamp 180.0 180.0 180.0