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: 21MY22
# Created Wed Mar 26 01:11:28 2025
# Orbit generated from Bernstein formalism
# Fitting 15 observations of 15
# Arc: 1.34y
# First observation: 2021/06/17
# Last observation: 2022/10/21
Preliminary a, adot, b, bdot, g, gdot:
-0.000060 0.042606 -0.000006 -0.002057 0.033700 0.000000
# Chi-squared of fit: 0.84 DOF: 24 RMS: 0.04
# Min/Max residuals: -0.07 0.07
# Exact a, adot, b, bdot, g, gdot:
2.007247E-05 4.349576E-02 -8.663971E-07 -2.158826E-03 3.426364E-02 2.574705E-03
# Covariance matrix:
4.6702E-13 4.7629E-12 5.4136E-14 -7.3858E-13 2.5174E-12 2.1312E-10
4.7629E-12 1.4938E-10 1.7201E-12 -2.3675E-11 7.0115E-11 6.7967E-09
5.4136E-14 1.7201E-12 2.0852E-13 -4.2725E-13 8.0428E-13 7.8649E-11
-7.3858E-13 -2.3675E-11 -4.2725E-13 4.0437E-12 -1.1058E-11 -1.0831E-09
2.5174E-12 7.0115E-11 8.0428E-13 -1.1058E-11 3.3333E-11 3.1766E-09
2.1312E-10 6.7967E-09 7.8649E-11 -1.0831E-09 3.1766E-09 3.1084E-07
# lat0 lon0 xBary yBary zBary JD0
1.028792 -73.146234 0.364827 0.016728 -0.943434 2459382.936851
# Heliocentric elements and errors
Epoch: 2459380.5000 = 2021/06/15
Mean Anomaly: 7.78272 +/- 2.055
Argument of Peri: 147.28406 +/- 3.548
Long of Asc Node: 125.60673 +/- 0.007
Inclination: 2.99215 +/- 0.001
Eccentricity: 0.24659343 +/- 0.0041
Semi-Major Axis: 39.79136825 +/- 0.0937
Time of Perihelion: 2457398.4686 +/- 523.4
Perihelion: 29.97907833 +/- 0.1769
Aphelion: 49.60365817 +/- 0.1999
Period (y) 251.0103 +/- 0.89
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 8.39304231 +/- 0.0014
Ecliptic Y -28.94094732 +/- 0.0047
Ecliptic Z 0.52406953 +/- 0.0001
Ecliptic XDOT 0.00339231 +/- 0.0000
Ecliptic YDOT 0.00081502 +/- 0.0000
Ecliptic ZDOT -0.00016897 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 30.13795348 +/- 0.0045
Geocenter to KBO 29.18545759 +/- 0.0049
# Hcoef: 10.09
The following table shows the complete astrometric record for 21MY22. 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 (21MY22) followed by the observatory code and reference code for the source of the astrometry.
2021 06 17.43605 19 12 32.368 -21 21 20.60 24.9r 21MY22 266 C~6Ip5 2021 06 17.50053 19 12 31.961 -21 21 21.33 24.9r 21MY22 266 C~6Ip5 2021 06 17.57953 19 12 31.462 -21 21 22.20 24.9r 21MY22 266 C~6Ip5 2021 07 05.35106 19 10 35.429 -21 24 55.65 24.3r 21MY22 266 C~6Ip5 2021 07 05.43951 19 10 34.822 -21 24 56.78 24.3r 21MY22 266 C~6Ip5 2021 07 05.52517 19 10 34.234 -21 24 57.84 24.3r 21MY22 266 C~6Ip5 2021 09 06.23258 19 04 57.566 -21 36 21.40 25.2r 21MY22 266 C~6Ip5 2021 09 06.31281 19 04 57.351 -21 36 21.96 25.2r 21MY22 266 C~6Ip5 2021 09 06.39352 19 04 57.136 -21 36 22.49 25.2r 21MY22 266 C~6Ip5 2022 10 20.21696 19 15 34.319 -21 27 52.21 21MY22 266 C~8ebo 2022 10 20.26058 19 15 34.451 -21 27 52.08 21MY22 266 C~8ebo 2022 10 20.29842 19 15 34.567 -21 27 51.95 21MY22 266 C~8ebo 2022 10 21.20926 19 15 37.486 -21 27 49.45 21MY22 266 C~8ebo 2022 10 21.25420 19 15 37.628 -21 27 49.30 21MY22 266 C~8ebo 2022 10 21.29846 19 15 37.769 -21 27 49.14 21MY22 266 C~8ebo
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 0.00 0.00 -0.03
2 0.0002 -5.73 0.00 -0.02 -0.03
3 0.0004 -12.76 -0.00 -0.02 -0.02
4 0.0490 -1647.39 0.00 -13.70 0.02
5 0.0493 -1655.94 0.00 -13.79 0.01
6 0.0495 -1664.22 0.00 -13.85 0.01
7 0.2212 -6412.11 -0.01 -146.56 0.01
8 0.2214 -6415.16 0.00 -146.78 0.01
9 0.2216 -6418.20 0.00 -146.97 0.01
10 1.3409 2471.29 0.06 -709.24 0.07
11 1.3411 2473.14 0.06 -709.35 0.06
12 1.3412 2474.76 0.07 -709.43 0.07
13 1.3437 2515.50 -0.06 -712.19 -0.07
14 1.3438 2517.48 -0.06 -712.30 -0.07
15 1.3439 2519.46 -0.06 -712.39 -0.07
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.
21MY22 quality flag:1 Type: 3:2E CENTAURR REMOVED axisobj 39.192 40.641 38.005 ecceobj 0.237 0.275 0.203 incobj 2.996 2.999 2.993 qmin 29.205 29.277 30.148 qmax 50.170 52.357 46.224 amean 39.455 40.827 38.135 amin 39.054 40.641 38.005 amax 39.930 40.942 38.215 emean 0.238 0.277 0.207 emin 0.219 0.273 0.203 emax 0.258 0.281 0.210 imean 3.385 1.681 1.567 imin 1.529 1.568 1.565 imax 4.548 1.794 1.569 excite_mean 0.246 0.278 0.208 fracstop 1.000 0.001 0.000 cjmean 2.982 2.975 2.992 libcent 0 180.4 -180.0 -180.0 libamp 0 54.2 -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 99.2 141.8 154.8 kozaiamp 51.9 1.8 0.6