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: 21LX43
# Created Mon Apr 28 01:11:26 2025
# Orbit generated from Bernstein formalism
# Fitting 21 observations of 21
# Arc: 1.37y
# First observation: 2021/06/09
# Last observation: 2022/10/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000030 0.022052 -0.000002 -0.000658 0.023199 0.000000
# Chi-squared of fit: 3.75 DOF: 36 RMS: 0.07
# Min/Max residuals: -0.19 0.13
# Exact a, adot, b, bdot, g, gdot:
1.494081E-05 2.212805E-02 -1.087840E-06 -6.815317E-04 2.336086E-02 7.164694E-04
# Covariance matrix:
3.4571E-13 2.5961E-13 1.7981E-14 -2.7517E-13 1.2973E-12 2.1264E-10
2.5961E-13 8.7890E-13 2.4742E-14 -3.7821E-13 2.0237E-12 2.9447E-10
1.7981E-14 2.4742E-14 1.4130E-13 -1.4970E-13 1.5613E-13 3.1287E-11
-2.7517E-13 -3.7821E-13 -1.4970E-13 8.0346E-13 -2.3918E-12 -4.7953E-10
1.2973E-12 2.0237E-12 1.5613E-13 -2.3918E-12 9.8329E-12 1.8351E-09
2.1264E-10 2.9447E-10 3.1287E-11 -4.7953E-10 1.8351E-09 3.6666E-07
# lat0 lon0 xBary yBary zBary JD0
0.968748 -72.001282 0.505200 0.014609 -0.876662 2459374.942811
# Heliocentric elements and errors
Epoch: 2459370.5000 = 2021/06/05
Mean Anomaly: 86.82015 +/- 2.396
Argument of Peri: 62.50879 +/- 0.595
Long of Asc Node: 135.81802 +/- 0.019
Inclination: 1.99020 +/- 0.001
Eccentricity: 0.01892720 +/- 0.0273
Semi-Major Axis: 43.72328758 +/- 0.0520
Time of Perihelion: 2433903.0391 +/- 701.4
Perihelion: 42.89572826 +/- 1.1934
Aphelion: 44.55084690 +/- 1.1935
Period (y) 289.1195 +/- 0.52
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 13.02387773 +/- 0.0018
Ecliptic Y -41.70076454 +/- 0.0055
Ecliptic Z 0.72376416 +/- 0.0001
Ecliptic XDOT 0.00249839 +/- 0.0000
Ecliptic YDOT 0.00072733 +/- 0.0001
Ecliptic ZDOT -0.00007863 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.69323734 +/- 0.0052
Geocenter to KBO 42.80663988 +/- 0.0057
# Hcoef: 8.93
The following table shows the complete astrometric record for 21LX43. 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 (21LX43) followed by the observatory code and reference code for the source of the astrometry.
2021 06 09.44201 19 17 26.841 -21 16 08.01 25.6r 21LX43 266 C~6Ip2 2021 06 09.52881 19 17 26.475 -21 16 08.66 25.6r 21LX43 266 C~6Ip2 2021 06 09.61426 19 17 26.114 -21 16 09.28 25.6r 21LX43 266 C~6Ip2 2021 06 17.43605 19 16 52.306 -21 17 10.31 26.2r 21LX43 266 C~6Ip2 2021 06 17.50053 19 16 52.011 -21 17 10.84 26.2r 21LX43 266 C~6Ip2 2021 06 17.57953 19 16 51.650 -21 17 11.47 26.2r 21LX43 266 C~6Ip2 2021 07 05.35106 19 15 27.550 -21 19 46.76 25.6r 21LX43 266 C~6Ip2 2021 07 05.43951 19 15 27.110 -21 19 47.59 25.6r 21LX43 266 C~6Ip2 2021 07 05.52517 19 15 26.683 -21 19 48.36 25.6r 21LX43 266 C~6Ip2 2021 09 05.23105 19 11 16.143 -21 28 09.59 26.3r 21LX43 266 C~6Ip2 2021 09 05.31314 19 11 15.950 -21 28 10.04 26.3r 21LX43 266 C~6Ip2 2021 09 05.39641 19 11 15.755 -21 28 10.47 26.3r 21LX43 266 C~6Ip2 2022 10 20.21696 19 16 25.670 -21 22 32.11 24.6V 21LX43 266 C~7um7 2022 10 20.26058 19 16 25.748 -21 22 32.02 24.6V 21LX43 266 C~7um7 2022 10 20.29842 19 16 25.816 -21 22 31.95 24.6V 21LX43 266 C~7um7 2022 10 21.20926 19 16 27.552 -21 22 30.11 24.6V 21LX43 266 C~7um7 2022 10 21.25420 19 16 27.636 -21 22 30.01 24.6V 21LX43 266 C~7um7 2022 10 21.29846 19 16 27.719 -21 22 29.91 24.6V 21LX43 266 C~7um8 2022 10 23.20599 19 16 31.628 -21 22 26.00 24.7V 21LX43 266 C~7um8 2022 10 23.25093 19 16 31.721 -21 22 25.89 24.7V 21LX43 266 C~7um8 2022 10 23.29489 19 16 31.812 -21 22 25.77 24.7V 21LX43 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 0.01 0.00 0.13
2 0.0002 -5.16 0.01 0.03 0.13
3 0.0005 -10.24 0.01 0.08 0.13
4 0.0219 -486.71 -0.05 1.69 0.06
5 0.0221 -490.87 -0.05 1.70 0.06
6 0.0223 -495.96 -0.05 1.74 0.06
7 0.0709 -1681.47 0.05 0.40 -0.03
8 0.0712 -1687.67 0.05 0.37 -0.04
9 0.0714 -1693.69 0.05 0.37 -0.04
10 0.2404 -5229.01 -0.01 -57.94 -0.18
11 0.2406 -5231.74 -0.01 -58.06 -0.19
12 0.2408 -5234.50 -0.01 -58.16 -0.19
13 1.3628 -897.74 -0.02 -268.73 -0.06
14 1.3630 -896.65 -0.01 -268.79 -0.06
15 1.3631 -895.70 -0.01 -268.84 -0.06
16 1.3656 -871.42 0.01 -270.18 0.11
17 1.3657 -870.24 0.01 -270.23 0.11
18 1.3658 -869.08 -0.00 -270.28 0.11
19 1.3710 -814.43 0.01 -273.53 -0.02
20 1.3711 -813.13 0.02 -273.59 -0.02
21 1.3713 -811.85 0.01 -273.63 -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.
21LX43 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.234 43.797 43.065 ecceobj 0.019 0.084 0.047 incobj 1.991 1.994 1.988 qmin 41.667 39.566 39.975 qmax 45.471 48.795 46.757 amean 43.461 44.045 43.274 amin 43.130 43.692 42.931 amax 43.800 44.425 43.631 emean 0.022 0.082 0.055 emin 0.005 0.065 0.035 emax 0.038 0.099 0.072 imean 1.725 1.578 2.025 imin 0.875 0.730 0.931 imax 2.412 2.310 2.753 excite_mean 0.038 0.087 0.066 fracstop 1.000 1.000 1.000 cjmean 3.093 3.093 3.087 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 188.8 167.0 185.6 kozaiamp 179.9 180.0 180.0