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: 21CJ46 # Created Tue Apr 1 01:11:23 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 25 observations of 25 # Arc: 14.98y # First observation: 2010/01/10 # Last observation: 2025/01/03 # Chi-squared of fit: 16.28 DOF: 44 RMS: 0.14 # Min/Max residuals: -0.47 0.52 # Exact a, adot, b, bdot, g, gdot: 1.558777E-05 2.160820E-02 9.694091E-07 1.146741E-03 2.306031E-02 -9.318717E-04 # Covariance matrix: 6.4106E-13 -1.1639E-13 1.2321E-14 -4.4026E-15 -5.7255E-14 -2.1985E-13 -1.1639E-13 3.7513E-14 -5.4805E-15 1.8989E-15 5.3911E-14 9.4501E-14 1.2321E-14 -5.4805E-15 4.1459E-13 -3.3660E-14 -1.1066E-14 -1.5341E-14 -4.4026E-15 1.8989E-15 -3.3660E-14 3.2263E-15 3.4717E-15 5.2741E-15 -5.7255E-14 5.3911E-14 -1.1066E-14 3.4717E-15 2.8242E-13 1.7072E-13 -2.1985E-13 9.4501E-14 -1.5341E-14 5.2741E-15 1.7072E-13 2.6223E-13 # lat0 lon0 xBary yBary zBary JD0 -1.464919 98.792947 -0.193284 -0.024743 -0.968066 2455206.940306 # Heliocentric elements and errors Epoch: 2455206.5000 = 2010/01/10 Mean Anomaly: 253.40710 +/- 0.100 Argument of Peri: 85.61845 +/- 0.091 Long of Asc Node: 124.17798 +/- 0.001 Inclination: 3.37008 +/- 0.000 Eccentricity: 0.03884396 +/- 0.0000 Semi-Major Axis: 43.78434347 +/- 0.0036 Time of Perihelion: 2486539.5340 +/- 30.8 Perihelion: 42.08358603 +/- 0.0036 Aphelion: 45.48510091 +/- 0.0039 Period (y) 289.7253 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -6.96265573 +/- 0.0002 Ecliptic Y 43.76536526 +/- 0.0010 Ecliptic Z -1.10858606 +/- 0.0000 Ecliptic XDOT -0.00251602 +/- 0.0000 Ecliptic YDOT -0.00049245 +/- 0.0000 Ecliptic ZDOT 0.00013886 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.32963823 +/- 0.0010 Geocenter to KBO 43.36461869 +/- 0.0010 # Hcoef: 5.43
The following table shows the complete astrometric record for 21CJ46. 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 (21CJ46) followed by the observatory code and reference code for the source of the astrometry.
2010 01 10.43954 06 37 51.72 +21 41 09.3 21CJ46 F51 C~6c5y 2010 01 10.44841 06 37 51.69 +21 41 09.5 21CJ46 F51 C~6c5y 2014 04 17.008210 06 55 51.84 +21 40 02.4 21.7r 21CJ46 W84 C~6VLf 2015 01 09.264545 07 04 47.22 +21 28 12.5 21.1z 21CJ46 W84 C~6VLf 2019 01 06.340006 07 26 31.67 +21 05 43.7 21.4i 21CJ46 T09 C~6VLf 2019 01 08.321857 07 26 21.67 +21 06 05.5 21.3i 21CJ46 T09 C~6VLf 2019 03 02.090657 07 22 34.33 +21 14 49.0 21.5i 21CJ46 W84 C~6VLf 2019 03 02.092720 07 22 34.33 +21 14 49.0 21CJ46 W84 C~6VLf 2019 12 09.309565 07 34 03.67 +20 53 38.0 21.4i 21CJ46 W84 C~6VLf 2019 12 09.311279 07 34 03.66 +20 53 38.0 21CJ46 W84 C~6VLf 2021 02 15.26809 07 34 03.721 +20 58 49.17 22.6R 21CJ46 568 C~6VLf 2021 02 16.27133 07 33 59.754 +20 58 59.45 22.8R 21CJ46 568 C~6VLf 2021 03 01.072252 07 33 15.02 +21 00 57.6 21.4i 21CJ46 W84 C~6VLf 2021 04 02.010224 07 32 22.73 +21 03 44.2 21.6i 21CJ46 W84 C~6VLf 2021 04 02.013169 07 32 22.72 +21 03 44.2 21CJ46 W84 C~6VLf 2023 10 15.567933 07 56 35.007 +20 14 37.03 22.2w 21CJ46 F51 C~7Bl9 2023 10 15.580929 07 56 35.020 +20 14 36.92 22.1w 21CJ46 F51 C~7Bl9 2023 10 15.594876 07 56 35.055 +20 14 36.64 22.1w 21CJ46 F51 C~7Bl9 2024 12 22.398527 07 59 51.267 +20 10 06.27 21.8w 21CJ46 F51 C~8Woo 2024 12 22.411541 07 59 51.219 +20 10 06.33 21.8w 21CJ46 F51 C~8Woo 2024 12 22.424506 07 59 51.159 +20 10 06.47 22.0w 21CJ46 F51 C~8Woo 2024 12 22.437578 07 59 51.084 +20 10 06.74 21.6w 21CJ46 F51 C~8Woo 2025 01 03.518367 07 58 55.679 +20 12 50.76 22.3w 21CJ46 F51 C~8Zrm 2025 01 03.543854 07 58 55.578 +20 12 51.02 22.1w 21CJ46 F51 C~8Zrm 2025 01 03.556604 07 58 55.450 +20 12 51.35 22.3w 21CJ46 F51 C~8Zrm
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 -0.17 0.00 -0.03
2 0.0000 0.00 0.05 0.00 0.12
3 4.2644 0.00 0.14 0.00 -0.19
4 4.9961 0.00 0.19 0.00 -0.09
5 8.9881 0.00 0.01 0.00 0.19
6 8.9935 0.00 -0.22 0.00 0.05
7 9.1380 0.00 -0.01 0.00 0.05
8 9.1380 0.00 0.08 0.00 0.04
9 9.9107 0.00 0.08 0.00 -0.09
10 9.9107 0.00 0.03 0.00 -0.10
11 11.0988 0.00 -0.09 0.00 -0.02
12 11.1015 0.00 -0.03 0.00 0.02
13 11.1366 0.00 0.01 0.00 0.05
14 11.2240 0.00 0.06 0.00 0.01
15 11.2240 0.00 -0.08 0.00 0.01
16 13.7608 0.00 -0.09 0.00 0.12
17 13.7608 0.00 -0.14 0.00 0.06
18 13.7609 0.00 0.13 0.00 -0.18
19 14.9486 0.00 -0.04 0.00 0.03
20 14.9486 0.00 0.10 0.00 -0.08
21 14.9486 0.00 0.05 0.00 -0.11
22 14.9487 0.00 -0.21 0.00 -0.01
23 14.9817 0.00 0.17 0.00 0.06
24 14.9818 0.00 0.52 0.00 -0.04
25 14.9818 0.00 -0.47 0.00 0.11
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.
21CJ46 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.111 44.111 44.111 ecceobj 0.035 0.035 0.035 incobj 3.366 3.366 3.366 qmin 41.592 41.596 41.591 qmax 46.448 46.438 46.448 amean 43.921 43.921 43.921 amin 43.586 43.582 43.583 amax 44.276 44.277 44.271 emean 0.034 0.034 0.034 emin 0.018 0.018 0.018 emax 0.050 0.050 0.050 imean 2.184 2.184 2.184 imin 1.496 1.497 1.496 imax 2.858 2.858 2.857 excite_mean 0.052 0.052 0.052 fracstop 1.000 1.000 1.000 cjmean 3.097 3.097 3.097 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 184.6 184.5 184.7 kozaiamp 180.0 180.0 180.0