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: 21LB44
# Created Wed Dec 25 02:11:13 2024
# Orbit generated from Bernstein formalism
# Fitting 27 observations of 27
# Arc: 2.41y
# First observation: 2020/05/26
# Last observation: 2022/10/23
Preliminary a, adot, b, bdot, g, gdot:
0.000122 0.021639 -0.000019 -0.000824 0.023412 0.000000
# Chi-squared of fit: 1.75 DOF: 48 RMS: 0.05
# Min/Max residuals: -0.07 0.12
# Exact a, adot, b, bdot, g, gdot:
1.473681E-05 2.182407E-02 -1.145097E-06 -8.576674E-04 2.342074E-02 2.635667E-03
# Covariance matrix:
2.3137E-13 -4.9938E-13 -1.0143E-14 2.9301E-14 -3.4480E-13 -1.1908E-11
-4.9938E-13 2.8271E-12 6.6076E-14 -1.9194E-13 2.3539E-12 7.8405E-11
-1.0143E-14 6.6076E-14 1.7226E-13 -9.5355E-14 4.9864E-14 2.2195E-12
2.9301E-14 -1.9194E-13 -9.5355E-14 8.5935E-14 -1.4812E-13 -6.2771E-12
-3.4480E-13 2.3539E-12 4.9864E-14 -1.4812E-13 2.1098E-12 6.1742E-11
-1.1908E-11 7.8405E-11 2.2195E-12 -6.2771E-12 6.1742E-11 2.4998E-09
# lat0 lon0 xBary yBary zBary JD0
1.609671 -73.708317 0.666549 0.021148 -0.757085 2458995.943811
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 95.99776 +/- 0.447
Argument of Peri: 36.61576 +/- 0.393
Long of Asc Node: 140.90947 +/- 0.008
Inclination: 2.72201 +/- 0.001
Eccentricity: 0.10613434 +/- 0.0021
Semi-Major Axis: 42.53159457 +/- 0.0194
Time of Perihelion: 2431974.2847 +/- 124.5
Perihelion: 38.01753198 +/- 0.0899
Aphelion: 47.04565716 +/- 0.0908
Period (y) 277.3804 +/- 0.19
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 11.55129538 +/- 0.0008
Ecliptic Y -41.88738129 +/- 0.0025
Ecliptic Z 1.19940159 +/- 0.0001
Ecliptic XDOT 0.00254407 +/- 0.0000
Ecliptic YDOT 0.00042087 +/- 0.0000
Ecliptic ZDOT -0.00009180 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.46750166 +/- 0.0025
Geocenter to KBO 42.69719419 +/- 0.0026
# Hcoef: 8.69
The following table shows the complete astrometric record for 21LB44. 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 (21LB44) followed by the observatory code and reference code for the source of the astrometry.
2020 05 26.44301 19 09 50.710 -20 50 50.98 25.4r 21LB44 266 C~7um8 2020 05 26.50149 19 09 50.502 -20 50 51.28 25.4r 21LB44 266 C~7um8 2020 05 26.55599 19 09 50.307 -20 50 51.54 25.4r 21LB44 266 C~7um8 2020 05 29.44698 19 09 39.951 -20 51 06.24 25.2r 21LB44 266 C~7um8 2020 05 29.53371 19 09 39.625 -20 51 06.71 25.2r 21LB44 266 C~7um8 2020 05 29.61905 19 09 39.303 -20 51 07.15 25.2r 21LB44 266 C~7um8 2021 06 09.44201 19 14 18.767 -20 45 52.95 25.4r 21LB44 266 C~6Ip2 2021 06 09.52601 19 14 18.407 -20 45 53.53 25.4r 21LB44 266 C~6Ip2 2021 06 09.61426 19 14 18.030 -20 45 54.13 25.4r 21LB44 266 C~6Ip2 2021 06 17.43605 19 13 43.852 -20 46 51.61 25.9r 21LB44 266 C~6Ip2 2021 06 17.50053 19 13 43.555 -20 46 52.12 25.9r 21LB44 266 C~6Ip2 2021 06 17.57953 19 13 43.190 -20 46 52.72 25.9r 21LB44 266 C~6Ip2 2021 07 05.35106 19 12 18.515 -20 49 22.06 25.2r 21LB44 266 C~6Ip2 2021 07 05.43951 19 12 18.073 -20 49 22.86 25.2r 21LB44 266 C~6Ip2 2021 07 05.52517 19 12 17.645 -20 49 23.62 25.2r 21LB44 266 C~6Ip2 2021 09 06.23258 19 08 06.077 -20 58 01.70 25.7r 21LB44 266 C~6Ip2 2021 09 06.31281 19 08 05.899 -20 58 02.17 25.7r 21LB44 266 C~6Ip2 2021 09 06.39352 19 08 05.721 -20 58 02.62 25.7r 21LB44 266 C~6Ip2 2022 10 20.21696 19 13 14.764 -20 54 00.80 24.5V 21LB44 266 C~7um8 2022 10 20.26058 19 13 14.844 -20 54 00.75 24.5V 21LB44 266 C~7um8 2022 10 20.29842 19 13 14.914 -20 54 00.71 24.5V 21LB44 266 C~7um8 2022 10 21.20926 19 13 16.699 -20 53 59.94 24.2V 21LB44 266 C~7um8 2022 10 21.25420 19 13 16.786 -20 53 59.88 24.2V 21LB44 266 C~7um8 2022 10 21.29846 19 13 16.872 -20 53 59.83 24.2V 21LB44 266 C~7um8 2022 10 23.20599 19 13 20.874 -20 53 57.59 24.4V 21LB44 266 C~7um8 2022 10 23.25093 19 13 20.969 -20 53 57.52 24.4V 21LB44 266 C~7um8 2022 10 23.29489 19 13 21.063 -20 53 57.44 24.4V 21LB44 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 0.12
2 0.0002 -2.93 0.00 0.05 0.11
3 0.0003 -5.68 0.00 0.12 0.12
4 0.0082 -151.56 0.01 2.84 -0.04
5 0.0085 -156.15 0.01 2.91 -0.05
6 0.0087 -160.69 0.01 3.01 -0.05
7 1.0376 3767.20 -0.02 -165.97 0.01
8 1.0379 3762.12 -0.03 -165.91 0.02
9 1.0381 3756.79 -0.03 -165.84 0.02
10 1.0595 3273.89 0.01 -162.55 -0.05
11 1.0597 3269.69 0.02 -162.53 -0.06
12 1.0599 3264.54 0.01 -162.48 -0.06
13 1.1086 2067.65 0.01 -163.09 -0.02
14 1.1088 2061.40 0.01 -163.12 -0.02
15 1.1091 2055.35 0.01 -163.14 -0.03
16 1.2807 -1506.78 -0.02 -254.62 -0.07
17 1.2810 -1509.31 -0.02 -254.80 -0.07
18 1.2812 -1511.84 -0.02 -254.95 -0.07
19 2.4005 2815.56 0.04 -537.43 0.06
20 2.4006 2816.68 0.04 -537.52 0.07
21 2.4007 2817.66 0.04 -537.60 0.06
22 2.4032 2842.58 0.03 -539.95 0.01
23 2.4033 2843.80 0.03 -540.05 0.01
24 2.4034 2845.00 0.03 -540.15 0.01
25 2.4087 2900.93 -0.06 -544.92 -0.00
26 2.4088 2902.26 -0.06 -545.02 -0.01
27 2.4089 2903.58 -0.06 -545.10 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.
21LB44 quality flag:2 Type: SCATNEAR SCATNEAR CLASSICAL axisobj 42.006 42.070 41.945 ecceobj 0.106 0.111 0.102 incobj 2.723 2.723 2.722 qmin 36.510 36.574 36.329 qmax 48.900 48.738 48.363 amean 42.197 42.326 42.143 amin 41.816 41.832 41.775 amax 42.833 42.870 42.565 emean 0.106 0.112 0.080 emin 0.077 0.075 0.021 emax 0.142 0.137 0.138 imean 5.589 4.723 5.046 imin 1.376 1.475 1.456 imax 8.379 6.891 7.384 excite_mean 0.147 0.141 0.124 fracstop 1.000 1.000 1.000 cjmean 3.053 3.057 3.061 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 181.1 178.0 182.2 kozaiamp 180.0 180.0 179.9