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: 21LJ44
# Created Wed May 8 01:18:43 2024
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 18
# Arc: 1.37y
# First observation: 2021/06/09
# Last observation: 2022/10/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000029 0.021379 -0.000002 -0.001405 0.022769 0.000000
# Chi-squared of fit: 0.23 DOF: 30 RMS: 0.02
# Min/Max residuals: -0.03 0.05
# Exact a, adot, b, bdot, g, gdot:
1.471030E-05 2.144366E-02 -8.561320E-07 -1.444083E-03 2.291631E-02 -7.975701E-04
# Covariance matrix:
3.4078E-13 1.7988E-13 3.2706E-14 -4.9981E-13 1.2439E-12 2.0814E-10
1.7988E-13 7.7818E-13 2.5020E-14 -3.8155E-13 1.3417E-12 1.6105E-10
3.2706E-14 2.5020E-14 1.4799E-13 -2.5202E-13 2.8024E-13 5.7800E-11
-4.9981E-13 -3.8155E-13 -2.5202E-13 2.3622E-12 -4.2854E-12 -8.8415E-10
1.2439E-12 1.3417E-12 2.8024E-13 -4.2854E-12 9.2807E-12 1.7770E-09
2.0814E-10 1.6105E-10 5.7800E-11 -8.8415E-10 1.7770E-09 3.6588E-07
# lat0 lon0 xBary yBary zBary JD0
1.094478 -72.000579 0.505210 0.016532 -0.876622 2459374.942811
# Heliocentric elements and errors
Epoch: 2459370.5000 = 2021/06/05
Mean Anomaly: 272.08981 +/- 2.092
Argument of Peri: 257.99094 +/- 1.721
Long of Asc Node: 122.96477 +/- 0.009
Inclination: 3.98125 +/- 0.002
Eccentricity: 0.05008297 +/- 0.0279
Semi-Major Axis: 44.49380015 +/- 0.1181
Time of Perihelion: 2485842.3573 +/- 621.1
Perihelion: 42.26541863 +/- 1.2485
Aphelion: 46.72218167 +/- 1.2497
Period (y) 296.7956 +/- 1.18
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 13.28040877 +/- 0.0018
Ecliptic Y -42.48860642 +/- 0.0055
Ecliptic Z 0.83355452 +/- 0.0001
Ecliptic XDOT 0.00241368 +/- 0.0000
Ecliptic YDOT 0.00088625 +/- 0.0001
Ecliptic ZDOT -0.00017450 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.52354148 +/- 0.0053
Geocenter to KBO 43.63703727 +/- 0.0058
# Hcoef: 8.46
The following table shows the complete astrometric record for 21LJ44. 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 (21LJ44) followed by the observatory code and reference code for the source of the astrometry.
2021 06 09.44201 19 17 22.753 -21 08 39.00 25.7r 21LJ44 266 C~6Ip2 2021 06 09.52601 19 17 22.404 -21 08 39.65 25.7r 21LJ44 266 C~6Ip2 2021 06 09.61426 19 17 22.038 -21 08 40.31 25.7r 21LJ44 266 C~6Ip2 2021 06 17.43605 19 16 48.847 -21 09 42.94 25.6r 21LJ44 266 C~6Ip2 2021 06 17.50053 19 16 48.557 -21 09 43.49 25.6r 21LJ44 266 C~6Ip2 2021 06 17.57953 19 16 48.202 -21 09 44.14 25.6r 21LJ44 266 C~6Ip2 2021 07 05.35106 19 15 25.638 -21 12 23.76 24.9r 21LJ44 266 C~6Ip2 2021 07 05.43951 19 15 25.206 -21 12 24.60 24.9r 21LJ44 266 C~6Ip2 2021 07 05.52517 19 15 24.787 -21 12 25.40 24.9r 21LJ44 266 C~6Ip2 2021 09 05.23105 19 11 18.679 -21 21 09.50 25.4r 21LJ44 266 C~6Ip2 2021 09 05.31314 19 11 18.488 -21 21 09.98 25.4r 21LJ44 266 C~6Ip2 2021 09 05.39641 19 11 18.295 -21 21 10.46 25.4r 21LJ44 266 C~6Ip2 2022 10 21.20926 19 16 21.434 -21 18 46.39 24.1V 21LJ44 266 C~7um8 2022 10 21.25420 19 16 21.517 -21 18 46.32 24.1V 21LJ44 266 C~7um8 2022 10 21.29846 19 16 21.599 -21 18 46.25 24.1V 21LJ44 266 C~7um8 2022 10 23.20599 19 16 25.433 -21 18 43.27 24.0V 21LJ44 266 C~7um8 2022 10 23.25093 19 16 25.524 -21 18 43.18 24.0V 21LJ44 266 C~7um8 2022 10 23.29489 19 16 25.614 -21 18 43.09 24.0V 21LJ44 266 C~7um8
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 0.02 0.00 -0.03
2 0.0002 -4.93 0.01 -0.00 -0.03
3 0.0005 -10.09 0.01 0.02 -0.03
4 0.0219 -478.61 -0.01 -1.09 0.05
5 0.0221 -482.70 -0.02 -1.10 0.04
6 0.0223 -487.71 -0.02 -1.09 0.05
7 0.0709 -1653.46 0.01 -9.46 -0.01
8 0.0712 -1659.56 0.01 -9.51 -0.00
9 0.0714 -1665.48 0.00 -9.55 -0.00
10 0.2404 -5145.00 0.01 -97.83 -0.02
11 0.2406 -5147.71 0.00 -97.98 -0.01
12 0.2408 -5150.44 -0.01 -98.12 -0.02
13 1.3656 -929.55 -0.02 -489.85 -0.01
14 1.3657 -928.39 -0.01 -489.94 -0.01
15 1.3658 -927.25 -0.01 -490.02 -0.01
16 1.3710 -873.74 0.02 -494.04 0.01
17 1.3711 -872.47 0.02 -494.12 0.01
18 1.3713 -871.21 0.02 -494.19 0.01
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.
21LJ44 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.005 44.310 43.988 ecceobj 0.053 0.124 0.037 incobj 3.989 3.983 3.991 qmin 40.895 37.944 41.621 qmax 47.720 51.607 47.015 amean 44.214 44.554 44.202 amin 43.869 44.142 43.857 amax 44.581 45.016 44.561 emean 0.056 0.129 0.040 emin 0.041 0.111 0.024 emax 0.071 0.146 0.055 imean 2.796 2.994 2.756 imin 2.151 2.066 2.158 imax 3.457 3.819 3.386 excite_mean 0.074 0.139 0.063 fracstop 1.000 1.000 1.000 cjmean 3.098 3.084 3.099 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 177.6 176.0 175.8 kozaiamp 180.0 180.0 180.0