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: 19GU187
# Created Tue Apr 1 01:11:14 2025
# Orbit generated from Bernstein formalism
# Fitting 20 observations of 20
# Arc: 4.19y
# First observation: 2015/01/25
# Last observation: 2019/04/06
Preliminary a, adot, b, bdot, g, gdot:
-0.000067 0.029915 -0.000015 0.005236 0.027629 0.000000
# Chi-squared of fit: 13.19 DOF: 34 RMS: 0.14
# Min/Max residuals: -0.42 0.31
# Exact a, adot, b, bdot, g, gdot:
1.692972E-05 2.961474E-02 2.754491E-06 5.187381E-03 2.734041E-02 1.113155E-03
# Covariance matrix:
3.6596E-13 -2.2080E-13 3.8004E-15 -2.4034E-14 -1.0782E-13 -1.1074E-12
-2.2080E-13 1.0904E-12 -2.9329E-14 1.8554E-13 9.8731E-13 8.5767E-12
3.8004E-15 -2.9329E-14 3.4971E-13 -9.3357E-14 -2.3046E-14 -2.4633E-13
-2.4034E-14 1.8554E-13 -9.3357E-14 6.1832E-14 1.4604E-13 1.5577E-12
-1.0782E-13 9.8731E-13 -2.3046E-14 1.4604E-13 1.4055E-12 6.8620E-12
-1.1074E-12 8.5767E-12 -2.4633E-13 1.5577E-12 6.8620E-12 7.1754E-11
# lat0 lon0 xBary yBary zBary JD0
1.550120 176.094798 0.765025 0.016818 -0.615844 2457048.074250
# Heliocentric elements and errors
Epoch: 2457040.5000 = 2015/01/18
Mean Anomaly: 5.84850 +/- 0.091
Argument of Peri: 0.78815 +/- 0.124
Long of Asc Node: 166.28907 +/- 0.000
Inclination: 10.05841 +/- 0.000
Eccentricity: 0.14655524 +/- 0.0001
Semi-Major Axis: 43.53725346 +/- 0.0063
Time of Perihelion: 2455335.8630 +/- 26.5
Perihelion: 37.15664067 +/- 0.0069
Aphelion: 49.91786625 +/- 0.0084
Period (y) 287.2763 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -37.04313429 +/- 0.0016
Ecliptic Y 3.29543521 +/- 0.0001
Ecliptic Z 0.98951692 +/- 0.0000
Ecliptic XDOT -0.00030295 +/- 0.0000
Ecliptic YDOT -0.00295749 +/- 0.0000
Ecliptic ZDOT 0.00052238 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 37.20259178 +/- 0.0016
Geocenter to KBO 36.57589789 +/- 0.0016
# Hcoef: 9.10
The following table shows the complete astrometric record for 19GU187. 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 (19GU187) followed by the observatory code and reference code for the source of the astrometry.
2015 01 25.573472 11 48 07.76 +02 58 30.0 19GU187 T09 C~8Aj1 2015 01 25.583864 11 48 07.73 +02 58 30.2 19GU187 T09 C~8Aj1 2015 01 25.630698 11 48 07.60 +02 58 31.2 19GU187 T09 C~8Aj1 2015 01 25.636988 11 48 07.58 +02 58 31.4 19GU187 T09 C~8Aj1 2018 02 11.640411 12 07 23.95 +01 52 45.6 19GU187 T09 C~8Aj1 2018 02 11.643203 12 07 23.93 +01 52 45.8 19GU187 T09 C~8Aj1 2018 04 22.296758 12 02 10.15 +02 30 45.5 19GU187 T09 C~8Aj1 2018 04 22.405419 12 02 09.68 +02 30 48.6 19GU187 T09 C~8Aj1 2019 02 28.560758 12 13 00.59 +01 36 54.3 19GU187 T09 C~8Aj1 2019 03 03.568727 12 12 47.29 +01 38 36.1 19GU187 T09 C~8Aj1 2019 03 03.608930 12 12 47.11 +01 38 37.5 19GU187 T09 C~8Aj1 2019 04 04.45934 12 10 14.49 +01 57 01.3 24.9g 19GU187 T09 C~8Aj1 2019 04 04.48040 12 10 14.40 +01 57 02.3 25.2g 19GU187 T09 C~8Aj1 2019 04 04.48250 12 10 14.40 +01 57 02.3 25.2g 19GU187 T09 C~8Aj1 2019 04 04.50140 12 10 14.28 +01 57 03.2 25.3g 19GU187 T09 C~8Aj1 2019 04 05.52240 12 10 09.42 +01 57 37.1 25.2r 19GU187 T09 C~8Aj1 2019 04 05.54335 12 10 09.33 +01 57 37.2 24.4r 19GU187 T09 C~8Aj1 2019 04 05.54544 12 10 09.31 +01 57 37.9 24.7r 19GU187 T09 C~8Aj1 2019 04 06.292973 12 10 05.79 +01 58 02.1 19GU187 T09 C~8Aj1 2019 04 06.319752 12 10 05.66 +01 58 03.0 19GU187 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 0.04 0.00 0.05
2 0.0000 -0.49 0.03 0.00 0.01
3 0.0002 -2.68 0.00 0.15 -0.05
4 0.0002 -3.03 -0.06 0.21 -0.02
5 3.0474 17504.64 0.12 3307.63 -0.04
6 3.0474 17504.29 -0.07 3307.70 0.01
7 3.2381 12253.70 0.17 3511.07 0.02
8 3.2384 12245.98 -0.24 3511.09 0.05
9 4.0931 22559.16 -0.14 4470.74 -0.01
10 4.1013 22332.97 -0.01 4483.76 0.10
11 4.1014 22329.90 0.03 4483.96 0.14
12 4.1886 19764.13 0.09 4574.45 -0.42
13 4.1887 19762.48 0.14 4574.83 -0.07
14 4.1887 19762.48 0.31 4574.83 -0.07
15 4.1887 19760.45 -0.19 4574.93 0.01
16 4.1915 19679.36 -0.19 4576.68 0.23
17 4.1916 19678.07 0.20 4576.22 -0.25
18 4.1916 19677.51 -0.19 4576.75 0.28
19 4.1936 19618.93 0.00 4577.69 0.01
20 4.1937 19616.76 -0.02 4577.73 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.
19GU187 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.153 43.170 43.135 ecceobj 0.138 0.139 0.138 incobj 10.097 10.097 10.097 qmin 36.347 36.387 36.319 qmax 50.455 50.506 50.517 amean 43.287 43.307 43.286 amin 42.930 42.943 42.921 amax 43.679 43.701 43.691 emean 0.139 0.139 0.139 emin 0.122 0.121 0.122 emax 0.156 0.157 0.157 imean 9.948 9.915 9.927 imin 8.920 8.907 8.910 imax 10.950 10.962 10.947 excite_mean 0.222 0.222 0.222 fracstop 1.000 1.000 1.000 cjmean 3.034 3.034 3.034 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 173.8 174.3 174.2 kozaiamp 180.0 179.9 180.0