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: 21CP5 # Created Wed Apr 24 01:18:39 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 52 observations of 52 # Arc: 5.93y # First observation: 2018/04/13 # Last observation: 2024/03/17 # Chi-squared of fit: 38.15 DOF: 98 RMS: 0.15 # Min/Max residuals: -0.39 0.50 # Exact a, adot, b, bdot, g, gdot: 3.406075E-05 1.623758E-01 -4.724771E-07 3.202394E-03 7.598531E-02 -9.125153E-02 # Covariance matrix: 4.0580E-13 7.2455E-09 -4.1235E-15 1.1742E-09 -7.6729E-11 6.4958E-09 7.2455E-09 5.6548E-03 -3.4789E-09 9.1940E-04 -3.4856E-05 5.0880E-03 -4.1235E-15 -3.4789E-09 3.6956E-13 -5.6586E-10 2.1076E-11 -3.1305E-09 1.1742E-09 9.1940E-04 -5.6586E-10 1.4949E-04 -5.6629E-06 8.2725E-04 -7.6729E-11 -3.4856E-05 2.1076E-11 -5.6629E-06 2.5019E-07 -3.1336E-05 6.4958E-09 5.0880E-03 -3.1305E-09 8.2725E-04 -3.1336E-05 4.5780E-03 # lat0 lon0 xBary yBary zBary JD0 -8.919166 96.780141 -0.960708 0.042577 0.270781 2458221.763796 # Heliocentric elements and errors Epoch: 2458222.5000 = 2018/04/14 Mean Anomaly: 359.80096 +/- 0.305 Argument of Peri: 331.29271 +/- 0.111 Long of Asc Node: 180.71322 +/- 0.015 Inclination: 9.23602 +/- 0.002 Eccentricity: 0.97169140 +/- 0.0005 Semi-Major Axis: 372.91878309 +/- 0.0011 Time of Perihelion: 2459676.8329 +/- 2225.0 Perihelion: 10.55680877 +/- 0.1825 Aphelion: 735.28075741 +/- 0.1826 Period (y) 7201.6099 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -2.45817236 +/- 0.0000 Ecliptic Y 12.51810599 +/- 0.0000 Ecliptic Z -2.04038672 +/- 0.0000 Ecliptic XDOT -0.00542179 +/- 0.0001 Ecliptic YDOT -0.00390271 +/- 0.0000 Ecliptic ZDOT 0.00062360 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 12.91953182 +/- 0.0000 Geocenter to KBO 13.16073105 +/- 0.0000 # Hcoef: 12.10
The following table shows the complete astrometric record for 21CP5. 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 (21CP5) followed by the observatory code and reference code for the source of the astrometry.
2018 04 13.262995 06 27 39.54 +14 21 27.1 21CP5 T14 C~5zHI 2018 04 13.264977 06 27 39.57 +14 21 27.0 21CP5 T14 C~5zHI 2018 04 13.267095 06 27 39.58 +14 21 26.9 23.4i 21CP5 T14 C~5zHI 2018 04 13.269111 06 27 39.61 +14 21 27.3 21CP5 T14 C~5zHI 2019 12 28.441987 08 11 59.095 +11 03 42.53 22.2G 21CP5 F51 C~4Zx1 2019 12 28.454025 08 11 58.954 +11 03 42.91 22.5G 21CP5 F51 C~4Zx1 2019 12 28.466013 08 11 58.808 +11 03 43.22 22.3G 21CP5 F51 C~4Zx1 2019 12 28.478041 08 11 58.668 +11 03 43.56 22.7G 21CP5 F51 C~4Zx1 2020 01 01.559819 08 11 10.090 +11 05 40.18 22.0G 21CP5 F51 C~4Zx1 2020 01 01.573333 08 11 09.909 +11 05 40.50 22.3G 21CP5 F51 C~4Zx1 2020 01 01.586916 08 11 09.749 +11 05 41.25 22.4G 21CP5 F51 C~4Zx1 2020 01 01.600497 08 11 09.579 +11 05 41.57 22.3G 21CP5 F51 C~4Zx1 2020 01 17.377697 08 07 41.963 +11 16 31.65 22.6G 21CP5 F51 C~4Zx1 2020 01 23.370339 08 06 19.095 +11 21 48.90 22.7G 21CP5 F51 C~4Zx1 2020 01 23.381127 08 06 18.940 +11 21 49.67 22.5G 21CP5 F51 C~4Zx1 2020 01 23.391894 08 06 18.796 +11 21 50.56 23.2G 21CP5 F51 C~4Zx1 2020 01 26.132894 08 05 40.94 +11 24 26.7 22.6V 21CP5 W84 C~5zHI 2020 01 27.158019 08 05 26.85 +11 25 26.6 22.7V 21CP5 W84 C~5zHI 2020 01 27.170944 08 05 26.69 +11 25 27.3 22.6V 21CP5 W84 C~5zHI 2020 11 16.606203 09 11 15.805 +08 52 09.89 22.7G 21CP5 F51 C~4Zx1 2020 11 16.615594 09 11 15.832 +08 52 09.80 22.2G 21CP5 F51 C~4Zx1 2020 11 16.625046 09 11 15.910 +08 52 09.38 22.1G 21CP5 F51 C~4Zx1 2020 12 11.504103 09 11 46.673 +08 39 51.71 22.6G 21CP5 F51 C~4Zx1 2020 12 11.515074 09 11 46.648 +08 39 51.27 23.1G 21CP5 F51 C~4Zx1 2020 12 11.526079 09 11 46.615 +08 39 51.40 23.7G 21CP5 F51 C~4Zx1 2020 12 11.537075 09 11 46.582 +08 39 51.14 22.6G 21CP5 F51 C~4Zx1 2021 01 16.441738 09 06 49.799 +08 55 41.39 22.3G 21CP5 F51 C~4Zx1 2021 01 24.248833 09 05 09.98 +09 03 45.9 21.4i 21CP5 W84 C~5zHI 2021 02 07.361973 09 01 59.638 +09 21 07.83 22.1w 21CP5 F51 C~4Zx1 2021 02 07.373616 09 01 59.487 +09 21 08.85 22.7w 21CP5 F51 C~4Zx1 2021 02 07.385248 09 01 59.316 +09 21 09.67 22.5w 21CP5 F51 C~4Zx1 2021 02 07.396919 09 01 59.156 +09 21 10.70 22.6w 21CP5 F51 C~4Zx1 2021 02 08.25057 09 01 47.59 +09 22 19.5 21.9G 21CP5 807 C~4Zx1 2021 02 08.25527 09 01 47.53 +09 22 19.9 21.9G 21CP5 807 C~4Zx1 2021 02 08.25938 09 01 47.47 +09 22 20.2 22.0G 21CP5 807 C~4Zx1 2021 02 09.414671 09 01 31.93 +09 23 52.8 23.1G 21CP5 V06 C~4Zx1 2021 02 09.424976 09 01 31.80 +09 23 53.3 21CP5 V06 C~4Zx1 2021 02 09.435293 09 01 31.60 +09 23 54.1 21.9G 21CP5 V06 C~4Zx1 2021 02 09.445599 09 01 31.48 +09 23 54.8 21CP5 V06 C~4Zx1 2021 02 11.289951 09 01 06.892 +09 26 25.53 22.3G 21CP5 568 C~4Zx1 2021 02 11.291162 09 01 06.876 +09 26 25.65 22.5G 21CP5 568 C~4Zx1 2021 02 11.292375 09 01 06.858 +09 26 25.73 22.4G 21CP5 568 C~4Zx1 2021 12 01.437510 10 10 29.807 +05 42 47.04 22.7G 21CP5 G37 C~5JEm 2021 12 01.477330 10 10 30.048 +05 42 45.35 21CP5 G37 C~5JEm 2021 12 01.516450 10 10 30.275 +05 42 43.55 21CP5 G37 C~5JEm 2022 02 09.377362 10 04 42.106 +06 14 10.87 22.2w 21CP5 F52 C~5SKr 2022 02 09.388765 10 04 41.933 +06 14 11.58 22.0w 21CP5 F52 C~5SKr 2022 02 09.400284 10 04 41.788 +06 14 12.78 22.1w 21CP5 F52 C~5SKr 2022 02 09.411709 10 04 41.630 +06 14 13.80 22.1w 21CP5 F52 C~5SKr 2024 03 17.470169 11 58 42.918 -00 04 50.08 21.8w 21CP5 F51 C~7wPU 2024 03 17.483973 11 58 42.724 -00 04 48.66 22.1w 21CP5 F51 C~7wPU 2024 03 17.511589 11 58 42.373 -00 04 46.14 21.8w 21CP5 F51 C~7wPU
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 -0.05 0.00 0.24
2 0.0000 0.00 0.07 0.00 0.07
3 0.0000 0.00 -0.13 0.00 -0.10
4 0.0000 0.00 -0.02 0.00 0.23
5 1.7089 0.00 -0.00 0.00 -0.05
6 1.7089 0.00 0.02 0.00 0.02
7 1.7090 0.00 -0.04 0.00 0.02
8 1.7090 0.00 0.00 0.00 0.04
9 1.7202 0.00 0.07 0.00 -0.19
10 1.7202 0.00 -0.11 0.00 -0.29
11 1.7203 0.00 0.05 0.00 0.04
12 1.7203 0.00 0.05 0.00 -0.06
13 1.7635 0.00 0.04 0.00 -0.08
14 1.7799 0.00 0.15 0.00 -0.18
15 1.7799 0.00 0.12 0.00 -0.02
16 1.7800 0.00 0.25 0.00 0.27
17 1.7875 0.00 -0.15 0.00 -0.06
18 1.7903 0.00 -0.14 0.00 0.05
19 1.7903 0.00 0.18 0.00 -0.01
20 2.5964 0.00 0.15 0.00 -0.33
21 2.5964 0.00 -0.19 0.00 0.06
22 2.5965 0.00 0.22 0.00 0.13
23 2.6646 0.00 -0.34 0.00 0.34
24 2.6646 0.00 -0.16 0.00 -0.04
25 2.6646 0.00 -0.09 0.00 0.17
26 2.6647 0.00 -0.02 0.00 -0.02
27 2.7630 0.00 -0.00 0.00 -0.05
28 2.7844 0.00 0.07 0.00 0.03
29 2.8230 0.00 0.01 0.00 -0.02
30 2.8230 0.00 0.17 0.00 0.07
31 2.8231 0.00 0.02 0.00 -0.04
32 2.8231 0.00 0.05 0.00 0.06
33 2.8254 0.00 -0.04 0.00 -0.18
34 2.8254 0.00 0.03 0.00 -0.15
35 2.8255 0.00 -0.02 0.00 -0.18
36 2.8286 0.00 0.34 0.00 0.21
37 2.8286 0.00 0.50 0.00 -0.12
38 2.8287 0.00 -0.39 0.00 -0.15
39 2.8287 0.00 -0.08 0.00 -0.27
40 2.8337 0.00 -0.09 0.00 -0.00
41 2.8338 0.00 -0.08 0.00 0.02
42 2.8338 0.00 -0.11 0.00 -0.00
43 3.6363 0.00 -0.06 0.00 -0.04
44 3.6365 0.00 0.03 0.00 0.08
45 3.6366 0.00 -0.01 0.00 0.07
46 3.8278 0.00 0.28 0.00 0.25
47 3.8279 0.00 -0.07 0.00 -0.05
48 3.8279 0.00 0.02 0.00 0.14
49 3.8279 0.00 -0.10 0.00 0.15
50 5.9280 0.00 0.27 0.00 0.10
51 5.9281 0.00 -0.05 0.00 0.09
52 5.9281 0.00 -0.13 0.00 -0.27
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.
21CP5 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 404.194 404.121 404.267 ecceobj 0.974 0.974 0.974 incobj 9.206 9.206 9.206 qmin 9.074 -14.049 -13.471 qmax 824.585 ******** 8651.168 amean 240.307 2196.948 1514.844 amin 119.118 84.271 207.350 amax 417.907 ******** 4331.258 emean 0.953 0.983 0.988 emin 0.910 0.879 0.946 emax 0.978 1.003 1.010 imean 9.122 11.939 9.781 imin 8.395 3.335 5.586 imax 9.798 174.534 37.853 excite_mean 0.966 0.997 1.003 fracstop 0.058 0.840 0.219 cjmean 1.773 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 338.9 134.6 345.8 kozaiamp 179.0 179.7 13.8