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: 21LG44
# Created Mon Apr 28 01:11:26 2025
# Orbit generated from Bernstein formalism
# Fitting 12 observations of 12
# Arc: 88.95d
# First observation: 2021/06/09
# Last observation: 2021/09/06
Preliminary a, adot, b, bdot, g, gdot:
-0.000007 0.036700 -0.000003 -0.000191 0.025738 0.000000
# Chi-squared of fit: 0.01 DOF: 18 RMS: 0.01
# Min/Max residuals: -0.01 0.01
# Exact a, adot, b, bdot, g, gdot:
1.486821E-05 2.179799E-02 -1.914648E-07 -2.481563E-04 2.316150E-02 1.300741E-03
# Covariance matrix:
3.6120E-13 -3.7975E-12 3.1117E-16 -2.7316E-14 7.5841E-13 2.5577E-10
-3.7975E-12 2.6641E-07 -5.8404E-11 1.0542E-09 4.3401E-08 -1.2046E-06
3.1117E-16 -5.8404E-11 2.2876E-13 -1.3575E-12 -9.5175E-12 2.6363E-10
-2.7316E-14 1.0542E-09 -1.3575E-12 1.7773E-11 1.7162E-10 -4.7951E-09
7.5841E-13 4.3401E-08 -9.5175E-12 1.7162E-10 7.0808E-09 -1.9425E-07
2.5577E-10 -1.2046E-06 2.6363E-10 -4.7951E-09 -1.9425E-07 5.8557E-06
# lat0 lon0 xBary yBary zBary JD0
0.725296 -72.638586 0.495416 0.010954 -0.882281 2459374.942811
# Heliocentric elements and errors
Epoch: 2459370.5000 = 2021/06/05
Mean Anomaly: 89.97932 +/- 32.551
Argument of Peri: 36.87754 +/- 28.982
Long of Asc Node: 154.54200 +/- 0.917
Inclination: 0.95908 +/- 0.014
Eccentricity: 0.04638483 +/- 0.1125
Semi-Major Axis: 43.97284941 +/- 0.9039
Time of Perihelion: 2432750.0420 +/- 9595.2
Perihelion: 41.93317610 +/- 5.0200
Aphelion: 46.01252272 +/- 5.0350
Period (y) 291.5984 +/- 8.99
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 12.68104064 +/- 0.0468
Ecliptic Y -42.19957053 +/- 0.1497
Ecliptic Z 0.54659960 +/- 0.0020
Ecliptic XDOT 0.00251085 +/- 0.0000
Ecliptic YDOT 0.00062891 +/- 0.0003
Ecliptic ZDOT -0.00002757 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.06712284 +/- 0.1440
Geocenter to KBO 43.17510571 +/- 0.1569
# Hcoef: 9.71
The following table shows the complete astrometric record for 21LG44. 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 (21LG44) followed by the observatory code and reference code for the source of the astrometry.
2021 06 09.44201 19 14 52.080 -21 35 34.74 26.1r 21LG44 266 C~6Ip2 2021 06 09.52741 19 14 51.718 -21 35 35.35 26.1r 21LG44 266 C~6Ip2 2021 06 09.61426 19 14 51.350 -21 35 35.96 26.1r 21LG44 266 C~6Ip2 2021 06 17.43605 19 14 17.477 -21 36 34.23 26.4r 21LG44 266 C~6Ip2 2021 06 17.50053 19 14 17.182 -21 36 34.73 26.4r 21LG44 266 C~6Ip2 2021 06 17.57953 19 14 16.821 -21 36 35.34 26.4r 21LG44 266 C~6Ip2 2021 07 05.35106 19 12 52.835 -21 39 02.11 25.8r 21LG44 266 C~6Ip2 2021 07 05.43951 19 12 52.396 -21 39 02.88 25.8r 21LG44 266 C~6Ip2 2021 07 05.52517 19 12 51.972 -21 39 03.61 25.8r 21LG44 266 C~6Ip2 2021 09 06.23258 19 08 41.924 -21 46 44.92 26.0r 21LG44 266 C~6Ip2 2021 09 06.31281 19 08 41.746 -21 46 45.28 26.0r 21LG44 266 C~6Ip2 2021 09 06.39352 19 08 41.569 -21 46 45.62 26.0r 21LG44 266 C~6Ip2
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 -5.09 -0.00 0.04 0.01
3 0.0005 -10.25 -0.00 0.09 0.00
4 0.0219 -486.24 -0.00 2.38 -0.01
5 0.0221 -490.38 -0.00 2.40 -0.01
6 0.0223 -495.46 0.00 2.43 -0.01
7 0.0709 -1675.73 0.00 3.92 0.01
8 0.0712 -1681.90 -0.01 3.91 0.01
9 0.0714 -1687.86 0.01 3.93 0.00
10 0.2431 -5203.69 0.00 -31.92 -0.00
11 0.2433 -5206.19 -0.00 -31.99 -0.00
12 0.2435 -5208.68 0.00 -32.04 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.
21LG44 quality flag:1 Type: CLASSICAL SCATNEAR SCATNEAR axisobj 43.479 50.091 41.996 ecceobj 0.046 0.253 0.148 incobj 0.958 0.922 0.982 qmin 40.225 36.879 34.543 qmax 47.446 64.327 50.866 amean 43.707 50.297 42.367 amin 43.348 49.793 41.766 amax 44.118 50.885 42.982 emean 0.045 0.252 0.149 emin 0.022 0.239 0.120 emax 0.077 0.265 0.186 imean 1.829 1.669 7.488 imin 1.014 1.207 1.130 imax 2.540 2.118 12.922 excite_mean 0.056 0.254 0.202 fracstop 1.000 1.000 1.000 cjmean 3.094 3.098 3.034 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 173.1 187.6 178.5 kozaiamp 180.0 180.0 180.0