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: 19GW184
# Created Mon Apr 28 01:11:15 2025
# Orbit generated from Bernstein formalism
# Fitting 19 observations of 19
# Arc: 1.14y
# First observation: 2018/02/11
# Last observation: 2019/04/05
Preliminary a, adot, b, bdot, g, gdot:
0.000001 0.032181 -0.000006 0.002325 0.026329 0.000000
# Chi-squared of fit: 7.55 DOF: 32 RMS: 0.11
# Min/Max residuals: -0.30 0.25
# Exact a, adot, b, bdot, g, gdot:
1.936678E-05 3.187968E-02 1.259012E-06 2.286461E-03 2.620932E-02 -8.933284E-03
# Covariance matrix:
1.2289E-12 1.3193E-12 -3.4507E-14 2.3588E-13 1.6791E-12 7.9157E-11
1.3193E-12 5.1467E-12 -9.1929E-14 6.4676E-13 3.6741E-12 2.1549E-10
-3.4507E-14 -9.1929E-14 3.7816E-13 -3.7158E-13 -7.4220E-14 -4.2164E-12
2.3588E-13 6.4676E-13 -3.7158E-13 5.1731E-13 5.1214E-13 2.9596E-11
1.6791E-12 3.6741E-12 -7.4220E-14 5.1214E-13 3.4032E-12 1.7146E-10
7.9157E-11 2.1549E-10 -4.2164E-12 2.9596E-11 1.7146E-10 9.8667E-09
# lat0 lon0 xBary yBary zBary JD0
3.447309 179.395173 0.597330 0.047565 -0.787697 2458161.155206
# Heliocentric elements and errors
Epoch: 2458160.5000 = 2018/02/11
Mean Anomaly: 351.77557 +/- 0.089
Argument of Peri: 82.61303 +/- 0.307
Long of Asc Node: 139.45409 +/- 0.008
Inclination: 5.34858 +/- 0.001
Eccentricity: 0.63111468 +/- 0.0031
Semi-Major Axis: 94.40350673 +/- 0.6194
Time of Perihelion: 2465814.4162 +/- 35.4
Perihelion: 34.82406788 +/- 0.3721
Aphelion: 153.98294558 +/- 1.0521
Period (y) 917.2556 +/- 9.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -38.86754892 +/- 0.0027
Ecliptic Y 1.00058505 +/- 0.0001
Ecliptic Z 2.29429283 +/- 0.0002
Ecliptic XDOT 0.00091679 +/- 0.0000
Ecliptic YDOT -0.00334470 +/- 0.0000
Ecliptic ZDOT 0.00018215 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 38.94805912 +/- 0.0027
Geocenter to KBO 38.15437084 +/- 0.0027
# Hcoef: 8.75
The following table shows the complete astrometric record for 19GW184. 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 (19GW184) followed by the observatory code and reference code for the source of the astrometry.
2018 02 11.654405 12 03 16.32 +03 24 11.1 19GW184 T09 C~870j 2018 03 18.486862 12 00 51.58 +03 41 53.8 19GW184 T09 C~870j 2018 04 24.409486 11 58 12.90 +03 58 55.0 19GW184 T09 C~870j 2018 04 24.453253 11 58 12.73 +03 58 56.1 19GW184 T09 C~870j 2018 04 24.504079 11 58 12.55 +03 58 56.9 19GW184 T09 C~870j 2019 02 05.53446 12 10 34.89 +02 44 34.1 24.5i 19GW184 T09 C~83GG 2019 02 05.58442 12 10 34.74 +02 44 35.3 24.6i 19GW184 T09 C~83GG 2019 02 05.62497 12 10 34.62 +02 44 36.4 24.1i 19GW184 T09 C~83GG 2019 03 03.51760 12 09 00.74 +02 56 52.7 24.3z 19GW184 T09 C~83GG 2019 03 03.52564 12 09 00.69 +02 56 52.6 24.1z 19GW184 T09 C~83GG 2019 03 03.61973 12 09 00.29 +02 56 55.6 24.0z 19GW184 T09 C~83GG 2019 03 03.62241 12 09 00.27 +02 56 55.9 23.7z 19GW184 T09 C~83GG 2019 04 04.45724 12 06 35.30 +03 13 35.1 25.5g 19GW184 T09 C~83GG 2019 04 04.46994 12 06 35.25 +03 13 35.5 25.7g 19GW184 T09 C~83GG 2019 04 04.49094 12 06 35.16 +03 13 36.0 24.9g 19GW184 T09 C~83GG 2019 04 05.52031 12 06 30.50 +03 14 05.9 24.3r 19GW184 T09 C~83GG 2019 04 05.53288 12 06 30.47 +03 14 06.4 24.7r 19GW184 T09 C~83GG 2019 04 05.55382 12 06 30.36 +03 14 07.2 24.6r 19GW184 T09 C~83GG 2019 04 05.57477 12 06 30.28 +03 14 07.9 24.8r 19GW184 T09 C~83GG
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 -0.03 0.00 0.02
2 0.0954 -2410.99 0.07 112.04 0.07
3 0.1965 -4996.96 0.05 105.08 -0.02
4 0.1966 -4999.73 -0.14 105.07 0.08
5 0.1967 -5002.52 0.05 104.74 -0.15
6 0.9826 6974.46 0.08 443.68 -0.06
7 0.9827 6971.92 0.00 443.88 -0.10
8 0.9828 6969.83 -0.08 444.17 -0.01
9 1.0537 5384.85 0.03 556.62 0.25
10 1.0537 5384.20 -0.03 556.23 -0.16
11 1.0540 5377.50 0.09 556.58 -0.05
12 1.0540 5377.11 -0.11 556.74 0.09
13 1.1411 2986.33 -0.12 605.26 -0.03
14 1.1412 2985.48 -0.01 605.33 0.05
15 1.1412 2984.05 0.12 605.25 -0.02
16 1.1441 2908.11 -0.14 604.80 -0.30
17 1.1441 2907.49 0.18 605.08 -0.01
18 1.1441 2905.66 -0.10 605.15 0.08
19 1.1442 2904.29 0.07 605.32 0.25
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.
19GW184 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 91.707 92.997 90.496 ecceobj 0.620 0.627 0.613 incobj 5.357 5.356 5.358 qmin 33.982 33.817 34.031 qmax 155.448 166.298 166.042 amean 90.168 94.076 94.074 amin 87.564 88.029 89.511 amax 95.158 100.559 100.522 emean 0.612 0.629 0.627 emin 0.599 0.600 0.605 emax 0.634 0.654 0.652 imean 4.296 4.640 4.071 imin 3.731 3.976 3.575 imax 4.872 5.400 4.604 excite_mean 0.617 0.635 0.631 fracstop 1.000 1.000 1.000 cjmean 3.063 3.057 3.065 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 193.6 190.2 163.7 kozaiamp 180.0 180.0 180.0