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: 21LP44
# Created Wed May 8 01:18:43 2024
# Orbit generated from Bernstein formalism
# Fitting 24 observations of 24
# Arc: 1.28y
# First observation: 2020/05/26
# Last observation: 2021/09/06
Preliminary a, adot, b, bdot, g, gdot:
0.000010 0.034600 -0.000002 -0.002514 0.029080 0.000000
# Chi-squared of fit: 0.25 DOF: 42 RMS: 0.02
# Min/Max residuals: -0.03 0.04
# Exact a, adot, b, bdot, g, gdot:
1.870150E-05 3.410615E-02 -1.326443E-06 -2.485291E-03 2.867523E-02 -8.216249E-03
# Covariance matrix:
2.5890E-13 3.9073E-12 3.1295E-15 -3.2613E-13 3.4174E-12 1.1367E-10
3.9073E-12 1.7345E-10 1.3204E-13 -1.3898E-11 1.4648E-10 4.8437E-09
3.1295E-15 1.3204E-13 1.6345E-13 -1.5643E-13 1.1110E-13 3.7111E-12
-3.2613E-13 -1.3898E-11 -1.5643E-13 1.3222E-12 -1.1738E-11 -3.8905E-10
3.4174E-12 1.4648E-10 1.1110E-13 -1.1738E-11 1.2398E-10 4.0909E-09
1.1367E-10 4.8437E-09 3.7111E-12 -3.8905E-10 4.0909E-09 1.3560E-07
# lat0 lon0 xBary yBary zBary JD0
1.853670 -74.104972 0.661290 0.024520 -0.761582 2458995.943811
# Heliocentric elements and errors
Epoch: 2458990.5000 = 2020/05/21
Mean Anomaly: 340.78074 +/- 0.443
Argument of Peri: 206.31334 +/- 1.195
Long of Asc Node: 128.37307 +/- 0.006
Inclination: 4.53313 +/- 0.001
Eccentricity: 0.43389494 +/- 0.0107
Semi-Major Axis: 56.18742477 +/- 0.6620
Time of Perihelion: 2467203.3001 +/- 121.2
Perihelion: 31.80798566 +/- 0.7074
Aphelion: 80.56686388 +/- 1.1229
Period (y) 421.1792 +/- 7.44
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 9.12426888 +/- 0.0037
Ecliptic Y -34.44319881 +/- 0.0130
Ecliptic Z 1.12807157 +/- 0.0004
Ecliptic XDOT 0.00292737 +/- 0.0000
Ecliptic YDOT 0.00164205 +/- 0.0000
Ecliptic ZDOT -0.00026277 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.64910619 +/- 0.0126
Geocenter to KBO 34.87330888 +/- 0.0135
# Hcoef: 9.21
The following table shows the complete astrometric record for 21LP44. 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 (21LP44) followed by the observatory code and reference code for the source of the astrometry.
2020 05 26.44301 19 08 02.282 -20 39 07.01 25.1r 21LP44 266 C~6VLq 2020 05 26.50149 19 08 02.043 -20 39 07.36 25.1r 21LP44 266 C~6VLq 2020 05 26.55599 19 08 01.819 -20 39 07.69 25.1r 21LP44 266 C~6VLq 2020 05 29.44698 19 07 49.921 -20 39 25.31 24.4r 21LP44 266 C~6VLq 2020 05 29.53371 19 07 49.545 -20 39 25.87 24.4r 21LP44 266 C~6VLq 2020 05 29.61905 19 07 49.174 -20 39 26.40 24.4r 21LP44 266 C~6VLq 2020 05 31.44139 19 07 41.336 -20 39 38.22 24.5r 21LP44 266 C~6VLq 2020 05 31.52961 19 07 40.941 -20 39 38.82 24.5r 21LP44 266 C~6VLq 2020 05 31.61814 19 07 40.544 -20 39 39.40 24.5r 21LP44 266 C~6VLq 2021 06 09.44201 19 15 29.523 -20 34 51.66 24.6r 21LP44 266 C~6Ip3 2021 06 09.52601 19 15 29.107 -20 34 52.41 24.6r 21LP44 266 C~6Ip3 2021 06 09.61426 19 15 28.669 -20 34 53.17 24.6r 21LP44 266 C~6Ip3 2021 06 17.43605 19 14 48.965 -20 36 06.43 24.5r 21LP44 266 C~6Ip3 2021 06 17.50053 19 14 48.618 -20 36 07.07 24.5r 21LP44 266 C~6Ip3 2021 06 17.57953 19 14 48.193 -20 36 07.84 24.5r 21LP44 266 C~6Ip3 2021 07 05.34556 19 13 09.081 -20 39 19.09 24.9r 21LP44 266 C~6Ip3 2021 07 05.35106 19 13 09.044 -20 39 19.18 24.2r 21LP44 266 C~6Ip3 2021 07 05.39262 19 13 08.805 -20 39 19.64 24.9r 21LP44 266 C~6Ip3 2021 07 05.43532 19 13 08.554 -20 39 20.14 24.9r 21LP44 266 C~6Ip3 2021 07 05.43951 19 13 08.525 -20 39 20.21 24.2r 21LP44 266 C~6Ip3 2021 07 05.52517 19 13 08.021 -20 39 21.18 24.2r 21LP44 266 C~6Ip3 2021 09 06.23258 19 08 15.288 -20 50 34.24 24.9r 21LP44 266 C~6Ip3 2021 09 06.31281 19 08 15.091 -20 50 34.87 24.9r 21LP44 266 C~6Ip3 2021 09 06.39352 19 08 14.895 -20 50 35.48 24.9r 21LP44 266 C~6Ip3
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 -0.01
2 0.0002 -3.37 0.03 0.04 -0.00
3 0.0003 -6.53 0.02 0.08 -0.01
4 0.0082 -174.45 -0.01 2.00 -0.02
5 0.0085 -179.76 -0.01 2.05 -0.02
6 0.0087 -184.99 -0.02 2.13 -0.01
7 0.0137 -295.63 -0.01 3.15 0.02
8 0.0139 -301.20 -0.01 3.20 0.02
9 0.0142 -306.81 -0.00 3.27 0.02
10 1.0376 6265.08 -0.00 -513.46 0.00
11 1.0379 6259.18 -0.00 -513.45 0.00
12 1.0381 6252.98 -0.01 -513.42 0.01
13 1.0595 5690.21 -0.01 -515.11 0.00
14 1.0597 5685.29 -0.00 -515.13 0.00
15 1.0599 5679.27 0.00 -515.14 0.00
16 1.1086 4274.08 0.04 -530.23 0.02
17 1.1086 4273.56 -0.03 -530.26 0.01
18 1.1087 4270.17 0.04 -530.30 0.02
19 1.1088 4266.61 0.04 -530.36 0.02
20 1.1088 4266.20 -0.03 -530.38 0.00
21 1.1091 4259.05 -0.03 -530.46 0.00
22 1.2807 101.07 -0.00 -703.82 -0.02
23 1.2810 98.26 -0.00 -704.12 -0.03
24 1.2812 95.46 -0.00 -704.40 -0.03
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.
21LP44 quality flag:1 Type: 5:2EEE REMOVED CENTAURR axisobj 55.183 56.323 54.256 ecceobj 0.428 0.449 0.408 incobj 4.539 4.542 4.536 qmin 31.190 30.377 30.040 qmax 81.106 108.724 86.790 amean 55.462 63.402 53.639 amin 54.773 54.333 42.226 amax 56.394 70.094 59.614 emean 0.427 0.505 0.407 emin 0.417 0.432 0.282 emax 0.438 0.551 0.460 imean 3.144 1.836 2.247 imin 3.065 0.550 0.900 imax 3.248 3.124 5.050 excite_mean 0.430 0.506 0.410 fracstop 1.000 0.056 0.128 cjmean 2.994 2.976 2.994 libcent 0 180.6 -180.0 -180.0 libamp 0 71.6 -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 181.8 282.0 233.5 kozaiamp 179.9 59.9 179.9