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: 21RR205 # Created Wed Dec 25 02:11:14 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 17 observations of 17 # Arc: 5.11y # First observation: 2017/07/24 # Last observation: 2022/09/03 # Chi-squared of fit: 24.50 DOF: 28 RMS: 0.21 # Min/Max residuals: -0.54 0.33 # Exact a, adot, b, bdot, g, gdot: 1.894988E-05 1.863284E-02 -2.618626E-06 -1.275500E-03 1.703717E-02 5.093682E-03 # Covariance matrix: 4.2286E-13 -8.7543E-14 3.6115E-15 -2.2373E-16 1.4716E-13 -1.4802E-13 -8.7543E-14 6.9563E-13 3.7973E-14 -5.2482E-14 7.2191E-13 7.8633E-12 3.6115E-15 3.7973E-14 3.3880E-13 -8.2168E-14 4.8291E-14 4.4309E-13 -2.2373E-16 -5.2482E-14 -8.2168E-14 2.9427E-14 -5.8115E-14 -6.1514E-13 1.4716E-13 7.2191E-13 4.8291E-14 -5.8115E-14 1.0601E-12 8.3787E-12 -1.4802E-13 7.8633E-12 4.4309E-13 -6.1514E-13 8.3787E-12 9.2270E-11 # lat0 lon0 xBary yBary zBary JD0 -6.594378 -12.620880 0.726083 -0.080970 -0.701412 2457958.741851 # Heliocentric elements and errors Epoch: 2457958.5000 = 2017/07/24 Mean Anomaly: 0.31065 +/- 0.003 Argument of Peri: 208.32744 +/- 0.050 Long of Asc Node: 108.31447 +/- 0.003 Inclination: 7.64149 +/- 0.000 Eccentricity: 0.94284187 +/- 0.0004 Semi-Major Axis: 970.52196645 +/- 6.5744 Time of Perihelion: 2448428.8621 +/- 137.4 Perihelion: 55.47321762 +/- 0.5410 Aphelion: 1885.57071528 +/- 12.7789 Period (y) 30235.4375 +/- 307.22 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 57.42597657 +/- 0.0034 Ecliptic Y -13.60696129 +/- 0.0008 Ecliptic Z -6.74066770 +/- 0.0004 Ecliptic XDOT 0.00142935 +/- 0.0000 Ecliptic YDOT 0.00274351 +/- 0.0000 Ecliptic ZDOT -0.00029772 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 59.39947101 +/- 0.0033 Geocenter to KBO 58.69495614 +/- 0.0035 # Hcoef: 6.66
The following table shows the complete astrometric record for 21RR205. 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 (21RR205) followed by the observatory code and reference code for the source of the astrometry.
2017 07 24.241050 23 24 01.01 -11 03 07.7 24.3r 21RR205 W84 C~5rCe 2017 07 28.231026 23 23 53.56 -11 04 18.8 24.9g 21RR205 W84 C~5rCe 2017 09 22.059160 23 21 18.85 -11 23 01.6 24.8g 21RR205 W84 C~5rCe 2018 08 30.126665 23 26 36.79 -10 53 57.8 21RR205 W84 C~5rCe 2018 09 18.057969 23 25 39.12 -11 00 21.6 24.0z 21RR205 W84 C~5rCe 2019 10 02.141651 23 29 02.27 -10 43 08.5 24.3i 21RR205 W84 C~5rCe 2021 08 17.173033 23 39 14.76 -09 45 27.5 24.2i 21RR205 W84 C~5rCe 2021 08 28.378522 23 38 44.74 -09 49 18.8 24.1i 21RR205 W84 C~5rCe 2021 09 05.51392 23 38 21.163 -09 52 08.06 24.5r 21RR205 568 C~5oXv 2021 09 06.53240 23 38 18.154 -09 52 29.08 24.6r 21RR205 568 C~5oXv 2021 09 15.133099 23 37 52.35 -09 55 23.2 24.1i 21RR205 W84 C~5rCe 2021 12 02.04136 23 35 13.247 -10 07 10.38 24.4r 21RR205 304 C~5oXv 2021 12 07.04268 23 35 13.106 -10 06 36.33 24.5r 21RR205 304 C~5oXv 2022 06 07.34180 23 44 05.006 -09 10 02.04 24.5r 21RR205 304 C~5oXv 2022 06 07.41584 23 44 05.078 -09 10 02.36 24.4r 21RR205 304 C~5oXv 2022 09 02.25376 23 42 27.029 -09 29 37.12 24.3r 21RR205 304 C~5oXv 2022 09 03.26944 23 42 24.095 -09 29 58.21 24.5r 21RR205 304 C~5oXv
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 -0.44 0.00 0.14
2 0.0109 0.00 0.25 0.00 0.23
3 0.1638 0.00 0.06 0.00 0.23
4 1.1003 0.00 0.30 0.00 -0.34
5 1.1521 0.00 -0.30 0.00 -0.06
6 2.1900 0.00 0.28 0.00 -0.54
7 4.0655 0.00 -0.05 0.00 -0.15
8 4.0962 0.00 0.33 0.00 -0.02
9 4.1185 0.00 -0.30 0.00 0.06
10 4.1213 0.00 -0.15 0.00 0.07
11 4.1448 0.00 0.16 0.00 0.07
12 4.3581 0.00 -0.05 0.00 -0.06
13 4.3718 0.00 -0.01 0.00 0.15
14 4.8709 0.00 0.05 0.00 0.27
15 4.8711 0.00 -0.19 0.00 -0.04
16 5.1089 0.00 0.03 0.00 -0.01
17 5.1116 0.00 -0.06 0.00 -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.
21RR205 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 1107.426 1107.461 1107.391 ecceobj 0.950 0.950 0.950 incobj 7.647 7.647 7.647 qmin 45.075 44.786 45.069 qmax 2463.634 2503.146 2455.679 amean 977.519 991.735 985.772 amin 876.784 878.793 869.885 amax 1259.597 1279.387 1255.627 emean 0.943 0.944 0.943 emin 0.931 0.932 0.932 emax 0.956 0.957 0.956 imean 6.071 6.072 6.073 imin 5.585 5.576 5.584 imax 6.638 6.641 6.639 excite_mean 0.949 0.950 0.949 fracstop 1.000 1.000 1.000 cjmean 3.799 3.799 3.799 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 209.5 209.5 209.4 kozaiamp 3.2 3.1 3.0