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: 21LH44
# 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:
-0.000034 0.023645 -0.000002 -0.000774 0.023944 0.000000
# Chi-squared of fit: 0.59 DOF: 36 RMS: 0.03
# Min/Max residuals: -0.07 0.05
# Exact a, adot, b, bdot, g, gdot:
1.557068E-05 2.377783E-02 -5.200713E-07 -8.001639E-04 2.413963E-02 5.386580E-04
# Covariance matrix:
3.4511E-13 6.3537E-13 1.8442E-14 -2.7996E-13 1.3439E-12 2.0092E-10
6.3537E-13 3.0954E-12 8.2968E-14 -1.2611E-12 5.5275E-12 9.0158E-10
1.8442E-14 8.2968E-14 1.4163E-13 -1.5169E-13 1.6795E-13 3.0410E-11
-2.7996E-13 -1.2611E-12 -1.5169E-13 8.2669E-13 -2.5541E-12 -4.6284E-10
1.3439E-12 5.5275E-12 1.6795E-13 -2.5541E-12 1.0729E-11 1.8229E-09
2.0092E-10 9.0158E-10 3.0410E-11 -4.6284E-10 1.8229E-09 3.2954E-07
# lat0 lon0 xBary yBary zBary JD0
0.753546 -72.835082 0.492387 0.011412 -0.883969 2459374.942811
# Heliocentric elements and errors
Epoch: 2459370.5000 = 2021/06/05
Mean Anomaly: 10.41349 +/- 26.402
Argument of Peri: 147.43807 +/- 29.170
Long of Asc Node: 127.56210 +/- 0.013
Inclination: 2.05261 +/- 0.001
Eccentricity: 0.04835876 +/- 0.0053
Semi-Major Axis: 44.42879363 +/- 0.0305
Time of Perihelion: 2456241.6181 +/- 7932.9
Perihelion: 42.28027248 +/- 0.2383
Aphelion: 46.57731478 +/- 0.2387
Period (y) 296.1454 +/- 0.31
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 12.02331913 +/- 0.0016
Ecliptic Y -40.57186943 +/- 0.0054
Ecliptic Z 0.54486450 +/- 0.0001
Ecliptic XDOT 0.00260065 +/- 0.0000
Ecliptic YDOT 0.00074351 +/- 0.0001
Ecliptic ZDOT -0.00009013 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.31942426 +/- 0.0052
Geocenter to KBO 41.42566201 +/- 0.0056
# Hcoef: 9.04
The following table shows the complete astrometric record for 21LH44. 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 (21LH44) followed by the observatory code and reference code for the source of the astrometry.
2021 06 09.44201 19 14 00.851 -21 35 23.66 25.8r 21LH44 266 C~6Ip2 2021 06 09.52741 19 14 00.477 -21 35 24.31 25.8r 21LH44 266 C~6Ip2 2021 06 09.61426 19 14 00.097 -21 35 24.95 25.8r 21LH44 266 C~6Ip2 2021 06 17.43605 19 13 25.068 -21 36 26.73 25.6r 21LH44 266 C~6Ip2 2021 06 17.50053 19 13 24.763 -21 36 27.26 25.6r 21LH44 266 C~6Ip2 2021 06 17.57953 19 13 24.389 -21 36 27.90 25.6r 21LH44 266 C~6Ip2 2021 07 05.35106 19 11 57.557 -21 39 03.25 25.7r 21LH44 266 C~6Ip2 2021 07 05.43951 19 11 57.104 -21 39 04.07 25.7r 21LH44 266 C~6Ip2 2021 07 05.52517 19 11 56.665 -21 39 04.84 25.7r 21LH44 266 C~6Ip2 2021 09 06.23258 19 07 39.470 -21 47 14.36 26.2r 21LH44 266 C~6Ip2 2021 09 06.31281 19 07 39.290 -21 47 14.75 26.2r 21LH44 266 C~6Ip2 2021 09 06.39352 19 07 39.111 -21 47 15.12 26.2r 21LH44 266 C~6Ip2 2022 10 20.21696 19 13 20.496 -21 41 23.39 24.6V 21LH44 266 C~7um8 2022 10 20.26058 19 13 20.581 -21 41 23.28 24.6V 21LH44 266 C~7um8 2022 10 20.29842 19 13 20.656 -21 41 23.19 24.6V 21LH44 266 C~7um8 2022 10 21.20926 19 13 22.556 -21 41 21.17 25.0V 21LH44 266 C~7um8 2022 10 21.25420 19 13 22.648 -21 41 21.06 25.0V 21LH44 266 C~7um8 2022 10 21.29846 19 13 22.740 -21 41 20.94 25.0V 21LH44 266 C~7um8 2022 10 23.20599 19 13 26.986 -21 41 16.21 24.5V 21LH44 266 C~7um8 2022 10 23.25093 19 13 27.087 -21 41 16.08 24.5V 21LH44 266 C~7um8 2022 10 23.29489 19 13 27.187 -21 41 15.94 24.5V 21LH44 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 0.00 0.00 -0.00
2 0.0002 -5.26 0.00 0.01 -0.00
3 0.0005 -10.60 0.01 0.05 0.00
4 0.0219 -503.03 -0.03 0.20 0.04
5 0.0221 -507.31 -0.03 0.21 0.04
6 0.0223 -512.57 -0.03 0.23 0.05
7 0.0709 -1733.30 0.03 -3.63 0.02
8 0.0712 -1739.67 0.03 -3.67 0.01
9 0.0714 -1745.84 0.03 -3.68 0.01
10 0.2431 -5363.85 -0.01 -61.35 -0.07
11 0.2433 -5366.39 -0.01 -61.45 -0.07
12 0.2435 -5368.91 -0.00 -61.53 -0.07
13 1.3628 -603.42 -0.01 -286.14 0.01
14 1.3630 -602.23 -0.01 -286.18 0.01
15 1.3631 -601.19 0.00 -286.22 0.01
16 1.3656 -574.66 0.04 -287.53 0.01
17 1.3657 -573.37 0.04 -287.59 0.01
18 1.3658 -572.09 0.05 -287.63 0.01
19 1.3710 -512.78 -0.04 -290.35 -0.01
20 1.3711 -511.36 -0.04 -290.40 -0.01
21 1.3713 -509.96 -0.04 -290.43 -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.
21LH44 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.902 44.443 43.706 ecceobj 0.038 0.085 0.057 incobj 2.054 2.057 2.051 qmin 41.736 40.165 40.537 qmax 46.721 49.409 47.554 amean 44.139 44.696 43.927 amin 43.798 44.335 43.586 amax 44.484 45.088 44.287 emean 0.035 0.083 0.058 emin 0.019 0.068 0.041 emax 0.051 0.097 0.074 imean 1.356 1.278 1.544 imin 0.724 0.687 0.720 imax 1.943 1.852 2.225 excite_mean 0.044 0.086 0.064 fracstop 1.000 1.000 1.000 cjmean 3.101 3.101 3.096 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 156.6 170.1 180.0 kozaiamp 180.0 180.0 180.0