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: 21LB45
# Created Wed Nov 27 02:11:07 2024
# Orbit generated from Bernstein formalism
# Fitting 9 observations of 9
# Arc: 88.95d
# First observation: 2021/06/09
# Last observation: 2021/09/06
Preliminary a, adot, b, bdot, g, gdot:
-0.000003 0.068167 -0.000006 0.005202 0.034464 0.000000
# Chi-squared of fit: 0.02 DOF: 12 RMS: 0.01
# Min/Max residuals: -0.02 0.02
# Exact a, adot, b, bdot, g, gdot:
1.842779E-05 3.283271E-02 2.821958E-06 5.025658E-03 2.818581E-02 2.853165E-04
# Covariance matrix:
2.9158E-12 4.4143E-09 -7.2227E-13 2.2366E-11 7.8572E-10 -5.9583E-09
4.4143E-09 8.0673E-06 -1.2997E-09 3.9155E-08 1.4278E-06 -1.2270E-05
-7.2227E-13 -1.2997E-09 4.7754E-13 -7.5435E-12 -2.3023E-10 1.9410E-09
2.2366E-11 3.9155E-08 -7.5435E-12 2.0753E-10 6.9471E-09 -5.6492E-08
7.8572E-10 1.4278E-06 -2.3023E-10 6.9471E-09 2.5279E-07 -2.1579E-06
-5.9583E-09 -1.2270E-05 1.9410E-09 -5.6492E-08 -2.1579E-06 2.1142E-05
# lat0 lon0 xBary yBary zBary JD0
1.272169 -73.217883 0.486470 0.019485 -0.887099 2459374.942811
# Heliocentric elements and errors
Epoch: 2459370.5000 = 2021/06/05
Mean Anomaly: 359.14056 +/- 18.698
Argument of Peri: 9.74329 +/- 35.834
Long of Asc Node: 277.96796 +/- 0.663
Inclination: 8.78550 +/- 0.697
Eccentricity: 0.28554574 +/- 0.1491
Semi-Major Axis: 50.91013830 +/- 9.5570
Time of Perihelion: 2459687.2510 +/- 6890.7
Perihelion: 36.37296530 +/- 10.2105
Aphelion: 65.44731130 +/- 14.4422
Period (y) 363.2575 +/- 102.29
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 10.04010536 +/- 0.1826
Ecliptic Y -34.95418035 +/- 0.6058
Ecliptic Z 0.78786822 +/- 0.0141
Ecliptic XDOT 0.00306385 +/- 0.0001
Ecliptic YDOT 0.00091181 +/- 0.0005
Ecliptic ZDOT 0.00048848 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 36.37607972 +/- 0.5843
Geocenter to KBO 35.47884912 +/- 0.6329
# Hcoef: 10.34
The following table shows the complete astrometric record for 21LB45. 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 (21LB45) followed by the observatory code and reference code for the source of the astrometry.
2021 06 09.44201 19 12 06.326 -21 07 22.99 25.9r 21LB45 266 C~6Ip3 2021 06 09.52741 19 12 05.903 -21 07 23.38 25.9r 21LB45 266 C~6Ip3 2021 06 09.61426 19 12 05.473 -21 07 23.75 25.9r 21LB45 266 C~6Ip3 2021 06 17.43605 19 11 25.863 -21 08 02.64 25.5r 21LB45 266 C~6Ip3 2021 06 17.50053 19 11 25.518 -21 08 02.99 25.5r 21LB45 266 C~6Ip3 2021 06 17.57953 19 11 25.094 -21 08 03.40 25.5r 21LB45 266 C~6Ip3 2021 09 06.23258 19 04 59.472 -21 15 42.26 26.3r 21LB45 266 C~6Ip3 2021 09 06.31281 19 04 59.284 -21 15 42.47 26.3r 21LB45 266 C~6Ip3 2021 09 06.39352 19 04 59.096 -21 15 42.66 26.3r 21LB45 266 C~6Ip3
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 -0.00
2 0.0002 -5.92 -0.00 0.34 0.00
3 0.0005 -11.94 0.00 0.72 0.01
4 0.0219 -566.73 -0.00 30.06 -0.01
5 0.0221 -571.57 0.01 30.30 -0.00
6 0.0223 -577.51 -0.01 30.62 0.00
7 0.2431 -5988.75 -0.02 206.06 -0.00
8 0.2433 -5991.39 0.00 206.15 -0.00
9 0.2435 -5994.02 0.02 206.25 0.00
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.
21LB45 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0