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: 19GT187
# Created Mon Apr 28 01:11:15 2025
# Orbit generated from Bernstein formalism
# Fitting 12 observations of 12
# Arc: 1.14y
# First observation: 2018/02/11
# Last observation: 2019/04/05
Preliminary a, adot, b, bdot, g, gdot:
-0.000008 0.024813 0.000004 -0.004328 0.024755 0.000000
# Chi-squared of fit: 3.03 DOF: 18 RMS: 0.09
# Min/Max residuals: -0.30 0.13
# Exact a, adot, b, bdot, g, gdot:
1.582223E-05 2.469112E-02 -2.639914E-06 -4.290663E-03 2.468858E-02 -3.205727E-03
# Covariance matrix:
1.4615E-12 5.8901E-13 3.1008E-14 -4.1487E-13 1.7050E-12 8.1801E-11
5.8901E-13 4.5183E-12 8.8622E-14 -1.1689E-12 3.9936E-12 2.3180E-10
3.1008E-14 8.8622E-14 8.5895E-13 -8.1041E-13 9.1482E-14 5.6597E-12
-4.1487E-13 -1.1689E-12 -8.1041E-13 1.2052E-12 -1.2203E-12 -7.4382E-11
1.7050E-12 3.9936E-12 9.1482E-14 -1.2203E-12 4.8356E-12 2.4090E-10
8.1801E-11 2.3180E-10 5.6597E-12 -7.4382E-11 2.4090E-10 1.4771E-08
# lat0 lon0 xBary yBary zBary JD0
3.482304 -178.752249 0.622682 0.046842 -0.767860 2458161.144004
# Heliocentric elements and errors
Epoch: 2458160.5000 = 2018/02/11
Mean Anomaly: 313.05386 +/- 0.362
Argument of Peri: 224.44220 +/- 0.785
Long of Asc Node: 19.40246 +/- 0.004
Inclination: 10.38614 +/- 0.002
Eccentricity: 0.17366983 +/- 0.0047
Semi-Major Axis: 45.83218968 +/- 0.0779
Time of Perihelion: 2472939.7269 +/- 107.6
Perihelion: 37.87252120 +/- 0.2234
Aphelion: 53.79185816 +/- 0.2326
Period (y) 310.2874 +/- 0.79
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.20439969 +/- 0.0036
Ecliptic Y -0.28157544 +/- 0.0001
Ecliptic Z 2.46014996 +/- 0.0002
Ecliptic XDOT 0.00039163 +/- 0.0000
Ecliptic YDOT -0.00273510 +/- 0.0000
Ecliptic ZDOT -0.00049668 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.27873759 +/- 0.0036
Geocenter to KBO 40.50456481 +/- 0.0036
# Hcoef: 8.68
The following table shows the complete astrometric record for 19GT187. 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 (19GT187) followed by the observatory code and reference code for the source of the astrometry.
2018 02 11.643203 12 10 07.33 +02 41 55.0 19GT187 T09 C~8Aj1 2018 04 22.367255 12 05 10.18 +03 11 30.9 19GT187 T09 C~8Aj1 2019 02 05.587078 12 15 16.02 +01 52 10.5 19GT187 T09 C~8Aj1 2019 03 03.528310 12 13 42.25 +02 02 28.6 19GT187 T09 C~8Aj1 2019 03 03.608930 12 13 41.90 +02 02 30.8 19GT187 T09 C~8Aj1 2019 04 04.45934 12 11 17.37 +02 16 58.3 25.0g 19GT187 T09 C~8Aj1 2019 04 04.48250 12 11 17.25 +02 16 59.0 25.2g 19GT187 T09 C~8Aj1 2019 04 04.50140 12 11 17.17 +02 16 59.3 25.1g 19GT187 T09 C~8Aj1 2019 04 04.51189 12 11 17.12 +02 16 59.6 25.5g 19GT187 T09 C~8Aj1 2019 04 05.52240 12 11 12.55 +02 17 25.5 24.5r 19GT187 T09 C~8Aj1 2019 04 05.57477 12 11 12.31 +02 17 26.5 25.1r 19GT187 T09 C~8Aj1 2019 04 05.58315 12 11 12.27 +02 17 27.2 24.5r 19GT187 T09 C~8Aj1
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 -0.02
2 0.1909 -4791.33 0.00 -140.54 0.01
3 0.9827 5434.07 0.06 -893.44 0.03
4 1.0538 3897.66 -0.04 -887.20 0.04
5 1.0540 3891.97 -0.06 -887.27 0.07
6 1.1412 1558.86 0.09 -954.94 0.05
7 1.1412 1556.93 -0.13 -955.02 0.07
8 1.1413 1555.71 0.04 -955.22 -0.06
9 1.1413 1554.90 0.00 -955.24 -0.04
10 1.1441 1481.75 0.00 -958.77 0.01
11 1.1442 1478.06 0.12 -959.29 -0.30
12 1.1443 1477.23 -0.10 -958.88 0.13
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.
19GT187 quality flag:2 Type: CLASSICAL SCATNEAR CLASSICAL axisobj 45.379 45.534 45.243 ecceobj 0.166 0.177 0.155 incobj 10.430 10.431 10.428 qmin 37.236 36.840 37.778 qmax 54.353 55.070 53.645 amean 45.599 45.758 45.492 amin 45.214 45.340 45.087 amax 46.047 46.263 45.940 emean 0.166 0.175 0.157 emin 0.151 0.160 0.147 emax 0.182 0.192 0.168 imean 10.162 10.193 10.064 imin 9.491 9.482 9.575 imax 10.765 10.989 10.574 excite_mean 0.242 0.249 0.235 fracstop 1.000 1.000 1.000 cjmean 3.049 3.047 3.052 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 182.7 188.0 190.0 kozaiamp 179.9 179.9 180.0