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: 21RM238 # Created Fri May 3 01:18:49 2024 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 2.90y # First observation: 2019/09/29 # Last observation: 2022/08/24 Preliminary a, adot, b, bdot, g, gdot: -0.000073 0.023204 0.000124 -0.010451 0.024100 0.000000 # Chi-squared of fit: 1.82 DOF: 18 RMS: 0.07 # Min/Max residuals: -0.18 0.12 # Exact a, adot, b, bdot, g, gdot: 1.563969E-05 2.271906E-02 -7.216389E-06 -1.016074E-02 2.289998E-02 -8.895927E-03 # Covariance matrix: 6.7649E-13 -5.0477E-13 -3.4843E-14 8.7641E-14 2.2859E-13 -2.7572E-12 -5.0477E-13 1.1849E-12 2.0963E-13 -5.3230E-13 1.5005E-12 1.6734E-11 -3.4843E-14 2.0963E-13 5.4471E-13 -3.2671E-13 4.4936E-13 3.7296E-12 8.7641E-14 -5.3230E-13 -3.2671E-13 4.1586E-13 -1.1467E-12 -9.4868E-12 2.2859E-13 1.5005E-12 4.4936E-13 -1.1467E-12 6.4177E-12 3.6033E-11 -2.7572E-12 1.6734E-11 3.7296E-12 -9.4868E-12 3.6033E-11 2.9819E-10 # lat0 lon0 xBary yBary zBary JD0 -0.445552 -7.972658 -0.237270 -0.007537 -0.971172 2458755.514497 # Heliocentric elements and errors Epoch: 2458750.5000 = 2019/09/24 Mean Anomaly: 346.92596 +/- 0.042 Argument of Peri: 234.95510 +/- 0.044 Long of Asc Node: 171.34553 +/- 0.000 Inclination: 24.03826 +/- 0.001 Eccentricity: 0.58004686 +/- 0.0010 Semi-Major Axis: 90.28366432 +/- 0.1918 Time of Perihelion: 2470129.9051 +/- 4.0 Perihelion: 37.91490812 +/- 0.1222 Aphelion: 142.65242052 +/- 0.3167 Period (y) 857.8710 +/- 2.73 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 44.24258611 +/- 0.0048 Ecliptic Y -5.96324301 +/- 0.0007 Ecliptic Z -0.33990650 +/- 0.0001 Ecliptic XDOT -0.00067738 +/- 0.0000 Ecliptic YDOT 0.00283971 +/- 0.0000 Ecliptic ZDOT -0.00120671 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.64394953 +/- 0.0047 Geocenter to KBO 43.66815190 +/- 0.0048 # Hcoef: 7.86
The following table shows the complete astrometric record for 21RM238. 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 (21RM238) followed by the observatory code and reference code for the source of the astrometry.
2019 09 29.013696 23 31 24.936 -03 34 19.62 24.2r 21RM238 W84 C~7XPp 2019 09 29.177510 23 31 24.289 -03 34 24.75 24.2r 21RM238 W84 C~7XPp 2020 10 18.012125 23 35 58.773 -03 45 10.40 24.1r 21RM238 W84 C~7XPp 2020 10 18.176134 23 35 58.220 -03 45 14.78 24.1r 21RM238 W84 C~7XPp 2021 09 09.073508 23 44 22.749 -03 25 57.35 24.1r 21RM238 W84 C~7XPp 2021 09 09.192572 23 44 22.251 -03 26 01.52 24.1r 21RM238 W84 C~7XPp 2021 10 06.002765 23 42 34.717 -03 40 24.01 24.1r 21RM238 W84 C~7XPp 2021 10 06.167954 23 42 34.057 -03 40 29.11 24.1r 21RM238 W84 C~7XPp 2022 08 24.28478 23 51 23.28 -03 18 05.7 24.4V 21RM238 W84 C~7XPp 2022 08 24.30900 23 51 23.20 -03 18 06.5 24.7V 21RM238 W84 C~7XPp 2022 08 24.35714 23 51 23.02 -03 18 08.0 24.3V 21RM238 W84 C~7XPp 2022 08 24.38125 23 51 22.93 -03 18 08.7 24.6V 21RM238 W84 C~7XPp
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 0.01 0.00 0.04
2 0.0004 -10.92 0.01 -0.89 0.01
3 1.0541 3508.57 -0.00 -2218.39 -0.00
4 1.0545 3499.23 0.00 -2219.14 0.00
5 1.9468 10902.55 0.12 -4158.32 0.03
6 1.9471 10894.03 -0.18 -4159.17 -0.13
7 2.0205 9069.32 0.12 -4309.60 -0.04
8 2.0210 9058.20 -0.11 -4310.35 -0.01
9 2.9029 16896.75 0.00 -6247.63 0.06
10 2.9029 16895.33 0.08 -6247.88 -0.03
11 2.9031 16892.23 -0.01 -6248.18 -0.00
12 2.9031 16890.71 -0.04 -6248.28 0.06
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.
21RM238 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 91.368 91.863 90.881 ecceobj 0.586 0.588 0.584 incobj 23.990 23.989 23.992 qmin 36.553 36.555 36.582 qmax 147.452 148.217 146.089 amean 90.184 90.661 89.708 amin 88.780 89.223 88.217 amax 92.427 92.852 91.769 emean 0.579 0.582 0.578 emin 0.564 0.567 0.567 emax 0.595 0.597 0.592 imean 23.496 23.506 23.379 imin 22.737 22.731 22.735 imax 24.534 24.548 24.019 excite_mean 0.703 0.705 0.701 fracstop 1.000 1.000 1.000 cjmean 2.921 2.920 2.921 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 200.3 199.4 217.7 kozaiamp 180.0 180.0 180.0