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: 21SN11
# Created Sat Apr 20 01:18:52 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 41 observations of 41
# Arc: 2.36y
# First observation: 2020/07/18
# Last observation: 2022/11/26
# Chi-squared of fit: 78.15 DOF: 76 RMS: 0.24
# Min/Max residuals: -0.61 0.95
# Exact a, adot, b, bdot, g, gdot:
3.978095E-05 4.223355E-01 1.050484E-05 1.092029E-01 1.663617E-01 -8.650497E-02
# Covariance matrix:
1.3994E-13 -1.2719E-13 3.3289E-15 -3.1663E-14 7.0752E-14 -5.9080E-14
-1.2719E-13 9.3434E-13 -5.3811E-14 2.2499E-13 2.0017E-13 4.0298E-13
3.3289E-15 -5.3811E-14 9.8044E-14 -6.8515E-14 -1.4790E-14 -2.4072E-14
-3.1663E-14 2.2499E-13 -6.8515E-14 1.2231E-13 2.2421E-14 1.1231E-13
7.0752E-14 2.0017E-13 -1.4790E-14 2.2421E-14 2.3970E-13 3.4897E-14
-5.9080E-14 4.0298E-13 -2.4072E-14 1.1231E-13 3.4897E-14 2.0272E-13
# lat0 lon0 xBary yBary zBary JD0
8.999077 -14.362454 0.768108 0.101924 -0.644417 2459049.051329
# Heliocentric elements and errors
Epoch: 2459048.5000 = 2020/07/18
Mean Anomaly: 322.92962 +/- 0.078
Argument of Peri: 101.53272 +/- 0.000
Long of Asc Node: 312.41200 +/- 0.000
Inclination: 17.58180 +/- 0.000
Eccentricity: 0.36804825 +/- 0.0000
Semi-Major Axis: 8.55159846 +/- 0.0000
Time of Perihelion: 2459989.0760 +/- 2.0
Perihelion: 5.40419762 +/- 0.0002
Aphelion: 11.69899929 +/- 0.0002
Period (y) 25.0080 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 6.19843761 +/- 0.0000
Ecliptic Y -2.38524959 +/- 0.0000
Ecliptic Z 0.94035508 +/- 0.0000
Ecliptic XDOT 0.00009750 +/- 0.0000
Ecliptic YDOT 0.00715596 +/- 0.0000
Ecliptic ZDOT 0.00155214 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 6.70785583 +/- 0.0000
Geocenter to KBO 6.01107854 +/- 0.0000
# Hcoef: 14.54
The following table shows the complete astrometric record for 21SN11. 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 (21SN11) followed by the observatory code and reference code for the source of the astrometry.
2020 07 18.550528 22 53 12.735 +02 38 22.91 22.9G 21SN11 F51 C~55rz 2020 07 18.563140 22 53 12.568 +02 38 23.60 23.0G 21SN11 F51 C~55rz 2020 07 18.575841 22 53 12.418 +02 38 24.45 22.7G 21SN11 F51 C~55rz 2020 07 18.588594 22 53 12.257 +02 38 25.58 23.0G 21SN11 F51 C~55rz 2020 07 22.511551 22 52 21.477 +02 42 18.99 22.5G 21SN11 F51 C~55rz 2020 07 22.524566 22 52 21.321 +02 42 19.64 22.6G 21SN11 F51 C~55rz 2020 07 22.537875 22 52 21.117 +02 42 20.61 22.9G 21SN11 F51 C~55rz 2020 07 28.449462 22 50 51.078 +02 46 28.90 22.6G 21SN11 F52 C~55rz 2020 08 18.484418 22 43 42.088 +02 45 08.79 22.2G 21SN11 F52 C~55rz 2020 08 23.475341 22 41 42.577 +02 41 25.66 22.2G 21SN11 F52 C~55rz 2020 09 10.366516 22 34 18.984 +02 20 01.83 22.0G 21SN11 F52 C~55rz 2020 09 13.370453 22 33 06.087 +02 15 31.43 21.4G 21SN11 F52 C~55rz 2020 10 14.366838 22 23 09.723 +01 26 42.86 22.9G 21SN11 F51 C~55rz 2020 10 14.379245 22 23 09.545 +01 26 42.21 22.7G 21SN11 F51 C~55rz 2020 10 14.391624 22 23 09.390 +01 26 40.94 23.1G 21SN11 F51 C~55rz 2021 09 28.288499 00 06 21.125 +20 08 50.36 22.3w 21SN11 F52 C~55rz 2021 09 28.300104 00 06 20.817 +20 08 49.64 21.9w 21SN11 F52 C~55rz 2021 09 28.311681 00 06 20.500 +20 08 48.46 22.0w 21SN11 F52 C~55rz 2021 10 05.304662 00 03 11.467 +19 55 56.31 21.8G 21SN11 F52 C~55rz 2021 10 05.316157 00 03 11.158 +19 55 55.05 21.7G 21SN11 F52 C~55rz 2021 10 05.327690 00 03 10.856 +19 55 54.01 21.6G 21SN11 F52 C~55rz 2021 10 06.489838 00 02 39.908 +19 53 27.54 22.1w 21SN11 F51 C~55rz 2021 10 06.502005 00 02 39.583 +19 53 25.81 22.3w 21SN11 F51 C~55rz 2021 10 06.514184 00 02 39.258 +19 53 24.13 22.2w 21SN11 F51 C~55rz 2021 10 06.526252 00 02 38.932 +19 53 22.74 22.2w 21SN11 F51 C~55rz 2021 10 08.37102 00 01 50.58 +19 49 21.9 21SN11 291 C~55rz 2021 10 08.38497 00 01 50.17 +19 49 19.2 21SN11 291 C~55rz 2021 10 08.39894 00 01 49.78 +19 49 17.2 21.5R 21SN11 291 C~55rz 2021 10 09.177039 00 01 29.73 +19 47 32.4 22.1V 21SN11 H21 C~59xx 2021 10 09.184131 00 01 29.56 +19 47 31.7 22.1V 21SN11 H21 C~59xx 2022 10 17.516541 02 31 15.607 +37 10 55.61 21.5w 21SN11 F51 C~5tcL 2022 10 17.527958 02 31 15.267 +37 10 55.47 21.8w 21SN11 F51 C~5tcL 2022 10 17.554273 02 31 14.479 +37 10 54.62 21.8w 21SN11 F51 C~5tcL 2022 10 20.275826 02 29 54.906 +37 09 39.38 21.8G 21SN11 G96 C~5zIN 2022 10 20.280946 02 29 54.769 +37 09 38.99 22.5G 21SN11 G96 C~5zIN 2022 10 20.286073 02 29 54.593 +37 09 38.74 22.5G 21SN11 G96 C~5zIN 2022 10 20.291181 02 29 54.420 +37 09 39.71 22.0G 21SN11 G96 C~5zIN 2022 11 26.197236 02 11 41.586 +35 42 46.48 21.6G 21SN11 G96 C~63nU 2022 11 26.202453 02 11 41.485 +35 42 45.36 21.9G 21SN11 G96 C~63nU 2022 11 26.207671 02 11 41.388 +35 42 44.78 22.3G 21SN11 G96 C~63nU 2022 11 26.212923 02 11 41.258 +35 42 43.09 21.8G 21SN11 G96 C~63nU
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 0.08 0.00 0.00
2 0.0000 0.00 -0.05 0.00 -0.14
3 0.0001 0.00 0.09 0.00 -0.14
4 0.0001 0.00 0.08 0.00 0.14
5 0.0108 0.00 -0.48 0.00 0.10
6 0.0109 0.00 0.00 0.00 0.07
7 0.0109 0.00 -0.17 0.00 0.34
8 0.0271 0.00 0.44 0.00 -0.06
9 0.0847 0.00 0.12 0.00 -0.07
10 0.0984 0.00 0.08 0.00 -0.12
11 0.1473 0.00 -0.07 0.00 -0.05
12 0.1556 0.00 0.09 0.00 0.10
13 0.2404 0.00 -0.05 0.00 -0.18
14 0.2405 0.00 -0.27 0.00 0.21
15 0.2405 0.00 -0.15 0.00 -0.03
16 1.1957 0.00 -0.23 0.00 -0.33
17 1.1958 0.00 -0.01 0.00 0.03
18 1.1958 0.00 0.07 0.00 -0.06
19 1.2149 0.00 -0.06 0.00 -0.16
20 1.2150 0.00 0.01 0.00 -0.03
21 1.2150 0.00 0.20 0.00 0.34
22 1.2182 0.00 0.07 0.00 -0.03
23 1.2182 0.00 0.13 0.00 -0.18
24 1.2182 0.00 0.18 0.00 -0.27
25 1.2183 0.00 0.17 0.00 -0.09
26 1.2233 0.00 0.28 0.00 0.62
27 1.2234 0.00 -0.32 0.00 -0.18
28 1.2234 0.00 -0.61 0.00 -0.28
29 1.2255 0.00 -0.06 0.00 0.03
30 1.2256 0.00 0.21 0.00 0.29
31 2.2477 0.00 -0.08 0.00 -0.19
32 2.2477 0.00 -0.09 0.00 -0.09
33 2.2478 0.00 -0.21 0.00 -0.36
34 2.2552 0.00 -0.07 0.00 0.08
35 2.2553 0.00 0.23 0.00 -0.13
36 2.2553 0.00 -0.06 0.00 -0.20
37 2.2553 0.00 -0.31 0.00 0.95
38 2.3563 0.00 -0.44 0.00 -0.14
39 2.3563 0.00 -0.03 0.00 -0.12
40 2.3564 0.00 0.44 0.00 0.45
41 2.3564 0.00 0.43 0.00 -0.08
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.
21SN11 quality flag:3 Type: CENTAURR CENTAURR CENTAURR axisobj 8.578 8.578 8.578 ecceobj 0.369 0.369 0.369 incobj 17.576 17.576 17.576 qmin 5.412 5.412 5.412 qmax 11.744 11.744 11.744 amean 8.295 8.340 8.300 amin 7.892 8.060 8.069 amax 8.578 8.578 8.578 emean 0.298 0.297 0.320 emin 0.177 0.221 0.276 emax 0.369 0.369 0.369 imean 20.835 19.788 19.628 imin 19.019 19.019 19.019 imax 22.964 20.707 20.182 excite_mean 0.468 0.452 0.465 fracstop 0.001 0.001 0.000 cjmean 4.565 4.558 4.567 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 120.9 114.3 107.2 kozaiamp 29.0 16.4 5.4