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: 20KH42
# Created Sun Nov 24 02:11:02 2024
# Orbit generated from Bernstein formalism
# Fitting 79 observations of 79
# Arc: 3.06y
# First observation: 2018/06/18
# Last observation: 2021/07/08
Preliminary a, adot, b, bdot, g, gdot:
0.050551 -0.716844 -0.039367 0.245896 -0.452693 0.000000
# WARNING MRQMIN stopped after 17 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after 17 iterations -- oscilliatory solution
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# Chi-squared of fit: 9999.99 DOF: 153 RMS: 99.99
# Min/Max residuals: -9999.99 9999.99
# Exact a, adot, b, bdot, g, gdot:
-1.182326E+00 1.939493E+04 6.984728E-01 -7.673489E+03 1.007824E+03 -1.007795E+04
# Covariance matrix:
1.3792E-12 -3.2916E-08 4.1943E-14 1.2604E-08 -1.2835E-15 2.1679E-08
-3.2916E-08 1.4039E-03 -3.0672E-09 -5.4089E-04 7.8456E-11 -9.2850E-04
4.1943E-14 -3.0672E-09 5.5977E-13 9.2654E-10 -3.8222E-16 2.0163E-09
1.2604E-08 -5.4089E-04 9.2654E-10 2.1128E-04 -3.0285E-11 3.5836E-04
-1.2835E-15 7.8456E-11 -3.8222E-16 -3.0285E-11 8.2753E-18 -5.1688E-11
2.1679E-08 -9.2850E-04 2.0163E-09 3.5836E-04 -5.1688E-11 6.1519E-04
# lat0 lon0 xBary yBary zBary JD0
1.184036 -76.202795 0.296666 0.019988 -0.964356 2458287.707723
# Heliocentric elements and errors
Epoch: 2458280.5000 = 2018/06/11
Mean Anomaly: 351.75934 +/- 0.002
Argument of Peri: 224.86558 +/- 0.000
Long of Asc Node: 86.71989 +/- 0.000
Inclination: 26.75561 +/- 0.000
Eccentricity: 9.54174197 +/- 0.0000
Semi-Major Axis: -0.08758078 +/- 0.0000
Time of Perihelion: 2460638.0493 +/- 0.5
Perihelion: 0.74809241 +/- 0.0000
Aphelion: -0.92325397 +/- 0.0000
Period (y) 281.9752 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -0.05969694 +/- 0.0000
Ecliptic Y -1.01558530 +/- 0.0000
Ecliptic Z 0.00075116 +/- 0.0000
Ecliptic XDOT 0.04474987 +/- 0.0000
Ecliptic YDOT 0.03872536 +/- 0.0000
Ecliptic ZDOT -0.02140721 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 1.01733858 +/- 0.0000
Geocenter to KBO 0.00168556 +/- 0.0000
# Hcoef: NaN
The following table shows the complete astrometric record for 20KH42. 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 (20KH42) followed by the observatory code and reference code for the source of the astrometry.
2018 06 18.206922 18 59 24.85 -21 32 47.9 24.5V 20KH42 W84 C~7gyU 2018 06 18.260534 18 59 24.63 -21 32 48.0 20KH42 W84 C~7gyU 2018 06 18.340550 18 59 24.30 -21 32 48.0 20KH42 W84 C~7gyU 2020 05 31.44140 19 08 33.664 -20 22 28.45 24.3T 20KH42 266 C~55j3 2020 05 31.52962 19 08 33.356 -20 22 28.40 24.3T 20KH42 266 C~55j3 2020 05 31.61815 19 08 33.046 -20 22 28.33 24.3T 20KH42 266 C~55j3 2020 06 21.45391 19 07 12.479 -20 22 35.91 24.3T 20KH42 266 C~55j3 2020 06 21.53377 19 07 12.137 -20 22 36.01 24.3T 20KH42 266 C~55j3 2020 06 21.61262 19 07 11.799 -20 22 36.10 24.3T 20KH42 266 C~55j3 2020 08 12.26681 19 03 36.834 -20 24 30.61 24.4T 20KH42 266 C~55j3 2020 08 12.34844 19 03 36.546 -20 24 30.79 24.4T 20KH42 266 C~55j3 2020 08 12.42951 19 03 36.260 -20 24 30.95 24.4T 20KH42 266 C~55j3 2020 08 14.24287 19 03 30.094 -20 24 34.67 24.2T 20KH42 266 C~55j3 2020 08 14.33286 19 03 29.786 -20 24 34.87 24.2T 20KH42 266 C~55j3 2020 08 14.42135 19 03 29.483 -20 24 35.03 24.2T 20KH42 266 C~55j3 2020 11 01.296132 19 02 55.474 -20 22 29.32 20KH42 250 S~5zHC 2020 11 01.302451 19 02 55.485 -20 22 29.27 20KH42 250 S~5zHC 2020 11 01.308771 19 02 55.495 -20 22 29.19 20KH42 250 S~5zHC 2020 11 01.315090 19 02 55.507 -20 22 29.08 20KH42 250 S~5zHC 2020 11 01.321410 19 02 55.524 -20 22 28.95 20KH42 250 S~5zHC 2020 12 24.361700 14 47 24.64 +04 20 32.5 18.3r 20KH42 C54 S~5zHC 2020 12 24.362047 14 47 24.56 +04 20 33.4 20KH42 C54 S~5zHC 2020 12 24.362394 14 47 24.48 +04 20 33.2 20KH42 C54 S~5zHC 2020 12 24.445033 14 47 16.90 +04 21 51.3 18.5r 20KH42 C54 S~5zHC 2020 12 24.445380 14 47 16.90 +04 21 51.5 20KH42 C54 S~5zHC 2020 12 24.445728 14 47 16.83 +04 21 50.4 20KH42 C54 S~5zHC 2020 12 24.529061 14 47 09.19 +04 23 09.3 18.4r 20KH42 C54 S~5zHC 2020 12 24.611700 14 47 01.66 +04 24 27.9 18.4r 20KH42 C54 S~5zHC 2020 12 24.612047 14 47 01.56 +04 24 27.8 20KH42 C54 S~5zHC 2020 12 24.612394 14 47 01.56 +04 24 27.7 20KH42 C54 S~5zHC 2020 12 24.695033 14 46 53.93 +04 25 47.7 18.3r 20KH42 C54 S~5zHC 2020 12 24.695380 14 46 53.99 +04 25 48.3 20KH42 C54 S~5zHC 2020 12 24.695728 14 46 53.93 +04 25 48.7 20KH42 C54 S~5zHC 2020 12 24.778366 14 46 46.33 +04 27 06.8 18.5r 20KH42 C54 S~5zHC 2020 12 24.778714 14 46 46.23 +04 27 06.9 20KH42 C54 S~5zHC 2020 12 24.779061 14 46 46.32 +04 27 07.2 20KH42 C54 S~5zHC 2020 12 24.861700 14 46 38.57 +04 28 24.8 18.6r 20KH42 C54 S~5zHC 2020 12 24.862047 14 46 38.52 +04 28 25.4 20KH42 C54 S~5zHC 2020 12 24.862394 14 46 38.43 +04 28 27.3 20KH42 C54 S~5zHC 2020 12 24.945033 14 46 30.97 +04 29 45.5 18.6r 20KH42 C54 S~5zHC 2020 12 24.945380 14 46 30.93 +04 29 45.8 20KH42 C54 S~5zHC 2020 12 24.945728 14 46 30.93 +04 29 47.4 20KH42 C54 S~5zHC 2020 12 25.028366 14 46 23.35 +04 31 05.3 20KH42 C54 S~5zHC 2020 12 25.028714 14 46 23.34 +04 31 03.1 20KH42 C54 S~5zHC 2020 12 25.029061 14 46 23.35 +04 31 05.9 20KH42 C54 S~5zHC 2020 12 25.111700 14 46 15.63 +04 32 22.9 18.2r 20KH42 C54 S~5zHC 2020 12 25.112047 14 46 15.52 +04 32 23.9 20KH42 C54 S~5zHC 2020 12 25.112394 14 46 15.56 +04 32 24.8 20KH42 C54 S~5zHC 2020 12 25.195033 14 46 07.91 +04 33 43.5 18.2r 20KH42 C54 S~5zHC 2020 12 25.195380 14 46 07.81 +04 33 45.4 20KH42 C54 S~5zHC 2020 12 25.195728 14 46 07.83 +04 33 45.4 20KH42 C54 S~5zHC 2020 12 25.278366 14 46 00.21 +04 35 01.2 18.4r 20KH42 C54 S~5zHC 2020 12 25.278714 14 46 00.15 +04 35 02.0 20KH42 C54 S~5zHC 2020 12 25.279061 14 46 00.18 +04 35 01.4 20KH42 C54 S~5zHC 2020 12 25.361700 14 45 52.53 +04 36 22.4 20KH42 C54 S~5zHC 2020 12 25.362047 14 45 52.61 +04 36 23.5 20KH42 C54 S~5zHC 2020 12 25.362394 14 45 52.66 +04 36 23.3 20KH42 C54 S~5zHC 2020 12 25.445033 14 45 44.79 +04 37 41.6 18.5r 20KH42 C54 S~5zHC 2020 12 25.445380 14 45 44.81 +04 37 40.6 20KH42 C54 S~5zHC 2020 12 25.445728 14 45 44.71 +04 37 42.0 20KH42 C54 S~5zHC 2020 12 25.528366 14 45 37.07 +04 39 00.5 20KH42 C54 S~5zHC 2020 12 25.528714 14 45 37.14 +04 39 00.8 20KH42 C54 S~5zHC 2020 12 25.529061 14 45 37.06 +04 39 02.6 20KH42 C54 S~5zHC 2020 12 25.611700 14 45 29.33 +04 40 19.4 18.4r 20KH42 C54 S~5zHC 2020 12 25.612047 14 45 29.53 +04 40 20.5 20KH42 C54 S~5zHC 2020 12 25.612394 14 45 29.35 +04 40 21.2 20KH42 C54 S~5zHC 2020 12 25.695033 14 45 21.74 +04 41 39.1 20KH42 C54 S~5zHC 2020 12 25.695380 14 45 21.59 +04 41 40.2 20KH42 C54 S~5zHC 2020 12 25.695728 14 45 21.50 +04 41 41.2 20KH42 C54 S~5zHC 2020 12 25.778366 14 45 13.89 +04 42 58.7 18.3r 20KH42 C54 S~5zHC 2020 12 25.778714 14 45 13.86 +04 43 00.8 20KH42 C54 S~5zHC 2020 12 25.779061 14 45 13.90 +04 42 59.1 20KH42 C54 S~5zHC 2021 07 05.34555 19 10 18.493 -19 46 27.80 24.4r 20KH42 266 C~7ulo 2021 07 05.39261 19 10 18.282 -19 46 27.92 24.4r 20KH42 266 C~7ulo 2021 07 05.43531 19 10 18.091 -19 46 28.02 24.4r 20KH42 266 C~7ulo 2021 07 06.477060 19 10 13.46 -19 46 30.8 20KH42 T14 C~7gyU 2021 07 06.543105 19 10 13.18 -19 46 31.0 24.2w 20KH42 T14 C~7gyU 2021 07 08.352264 19 10 05.23 -19 46 35.7 24.2w 20KH42 T14 C~7gyU 2021 07 08.438029 19 10 04.83 -19 46 35.7 20KH42 T14 C~7gyU
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 0.00243913.34 0.00*********
2 0.0001 -3.06213366.94 0.21*********
3 0.0004 -7.64227416.59 0.68*********
4 1.9527 8106.77313082.60 3357.05*********
5 1.9530 8102.47313055.57 3357.61*********
6 1.9532 8098.14313028.60 3358.18*********
7 2.0103 6970.29307237.95 3480.85*********
8 2.0105 6965.49307217.82 3481.30*********
9 2.0107 6960.75307198.09 3481.75*********
10 2.1521 3941.84299438.30 3703.78*********
11 2.1523 3937.79299434.96 3704.04*********
12 2.1526 3933.77299431.80 3704.32*********
13 2.1575 3847.15299372.96 3710.01*********
14 2.1578 3842.82299370.11 3710.28*********
15 2.1580 3838.57299367.47 3710.58*********
16 2.3740 3376.57310357.25 3887.16*********
17 2.3740 3376.73310358.81 3887.19*********
18 2.3740 3376.87310360.37 3887.25*********
19 2.3740 3377.05310361.95 3887.35*********
20 2.3740 3377.31310363.61 3887.45*********
21 2.5192-450935.01********* 171026.96 49841.12
22 2.5192-450943.62********* 171031.02 49845.18
23 2.5192-450950.25********* 171031.63 49845.79
24 2.5195-451754.74********* 171394.78 50208.58
25 2.5195-451755.10********* 171395.41 50209.21
26 2.5195-451759.24********* 171393.04 50206.84
27 2.5197-452572.93********* 171760.78 50574.23
28 2.5199-453378.89********* 172127.00 50940.11
29 2.5199-453387.52********* 172128.26 50941.37
30 2.5199-453387.34********* 172127.94 50941.05
31 2.5202-454207.19********* 172501.32 51314.10
32 2.5202-454202.99********* 172502.27 51315.05
33 2.5202-454209.02********* 172504.48 51317.26
34 2.5204-455025.28********* 172872.55 51685.01
35 2.5204-455034.33********* 172874.46 51686.92
36 2.5204-455026.90********* 172873.98 51686.43
37 2.5206-455858.09********* 173244.02 52056.16
38 2.5206-455863.65********* 173246.73 52058.87
39 2.5206-455875.16********* 173254.20 52066.34
40 2.5208-456684.25********* 173622.70 52434.54
41 2.5208-456688.38********* 173624.29 52436.13
42 2.5208-456691.34********* 173629.39 52441.23
43 2.5211-457513.11********* 174000.03 52811.58
44 2.5211-457509.91********* 173993.17 52804.72
45 2.5211-457514.22********* 174001.94 52813.49
46 2.5213-458349.42********* 174373.16 53184.42
47 2.5213-458361.16********* 174378.15 53189.41
48 2.5213-458359.25********* 174380.37 53191.63
49 2.5215-459193.98********* 174757.10 53568.08
50 2.5215-459206.54********* 174764.82 53575.81
51 2.5215-459204.74********* 174764.49 53575.48
52 2.5218-460033.96********* 175132.63 53943.35
53 2.5218-460040.88********* 175136.19 53946.91
54 2.5218-460037.04********* 175133.77 53944.49
55 2.5220-460881.37********* 175520.31 54330.77
56 2.5220-460876.20********* 175522.53 54332.99
57 2.5220-460871.30********* 175521.06 54331.52
58 2.5222-461733.15********* 175903.79 54714.00
59 2.5222-461729.44********* 175900.23 54710.44
60 2.5222-461741.17********* 175906.41 54716.62
61 2.5224-462585.24********* 176287.21 55097.19
62 2.5224-462579.43********* 176287.01 55096.99
63 2.5224-462590.15********* 176294.17 55104.14
64 2.5227-463441.88********* 176672.21 55481.96
65 2.5227-463425.69********* 176672.42 55482.16
66 2.5227-463443.48********* 176677.71 55487.45
67 2.5229-464289.02********* 177058.53 55868.06
68 2.5229-464304.88********* 177064.64 55874.16
69 2.5229-464315.05********* 177069.41 55878.93
70 2.5231-465162.57********* 177450.19 56259.50
71 2.5231-465169.36********* 177457.53 56266.84
72 2.5231-465162.42********* 177451.32 56260.63
73 3.0476 9831.74308143.24 5332.87*********
74 3.0477 9828.76308135.68 5333.10*********
75 3.0479 9826.06308128.85 5333.32*********
76 3.0507 9760.66307965.71 5338.28*********
77 3.0509 9756.70307955.62 5338.55*********
78 3.0558 9644.44307680.65 5347.12*********
79 3.0561 9638.82307667.37 5347.79*********
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.
20KH42 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 77.187 77.186 77.188 ecceobj 0.519 0.519 0.519 incobj 25.918 25.918 25.918 qmin 36.549 36.547 36.551 qmax 120.453 119.931 120.272 amean 77.282 77.212 77.268 amin 76.252 76.127 76.186 amax 78.896 78.640 78.863 emean 0.510 0.510 0.510 emin 0.493 0.493 0.493 emax 0.527 0.526 0.527 imean 27.885 27.901 27.886 imin 27.290 27.290 27.281 imax 28.840 28.856 28.864 excite_mean 0.692 0.692 0.692 fracstop 1.000 1.000 1.000 cjmean 2.824 2.824 2.824 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 196.2 195.9 195.7 kozaiamp 115.4 115.2 115.2