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: 19EG7
# Created Tue Apr 1 01:11:12 2025
# Orbit generated from Bernstein formalism
# Fitting 15 observations of 15
# Arc: 1.96y
# First observation: 2017/03/23
# Last observation: 2019/03/08
Preliminary a, adot, b, bdot, g, gdot:
-0.000001 0.018855 0.000002 -0.000388 0.021583 0.000000
# Chi-squared of fit: 5.08 DOF: 24 RMS: 0.10
# Min/Max residuals: -0.19 0.32
# Exact a, adot, b, bdot, g, gdot:
1.388108E-05 1.885146E-02 -3.339213E-08 -3.873592E-04 2.149521E-02 -2.093721E-04
# Covariance matrix:
1.4639E-12 -2.1152E-12 -1.5551E-14 3.2782E-14 -9.3765E-13 -3.4778E-11
-2.1152E-12 4.3497E-12 4.1791E-14 -8.4156E-14 3.3192E-12 8.8512E-11
-1.5551E-14 4.1791E-14 6.4407E-13 -4.1010E-13 4.3926E-14 9.6838E-13
3.2782E-14 -8.4156E-14 -4.1010E-13 3.0872E-13 -8.1691E-14 -1.9125E-12
-9.3765E-13 3.3192E-12 4.3926E-14 -8.1691E-14 4.8608E-12 8.4536E-11
-3.4778E-11 8.8512E-11 9.6838E-13 -1.9125E-12 8.4536E-11 2.0038E-09
# lat0 lon0 xBary yBary zBary JD0
1.307109 173.995715 -0.142950 0.022590 -0.982848 2457835.708056
# Heliocentric elements and errors
Epoch: 2457830.5000 = 2017/03/18
Mean Anomaly: 188.47573 +/- 1.803
Argument of Peri: 305.21051 +/- 1.803
Long of Asc Node: 41.54426 +/- 0.040
Inclination: 1.73946 +/- 0.001
Eccentricity: 0.06974078 +/- 0.0003
Semi-Major Axis: 44.43828945 +/- 0.0130
Time of Perihelion: 2509383.9233 +/- 541.3
Perihelion: 41.33912828 +/- 0.0177
Aphelion: 47.53745062 +/- 0.0190
Period (y) 296.2403 +/- 0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -47.25060952 +/- 0.0047
Ecliptic Y 4.82061618 +/- 0.0005
Ecliptic Z 1.06121594 +/- 0.0001
Ecliptic XDOT -0.00022231 +/- 0.0000
Ecliptic YDOT -0.00239720 +/- 0.0000
Ecliptic ZDOT -0.00005001 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 47.50773221 +/- 0.0047
Geocenter to KBO 46.52199089 +/- 0.0048
# Hcoef: 7.06
The following table shows the complete astrometric record for 19EG7. 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 (19EG7) followed by the observatory code and reference code for the source of the astrometry.
2017 03 23.207255 11 40 01.560 +03 35 05.50 24.1V 19EG7 W84 C~8HR7 2018 03 18.45971 11 44 18.54 +03 05 56.4 23.5i 19EG7 T09 C~83G9 2018 03 18.46308 11 44 18.53 +03 05 56.6 23.4i 19EG7 T09 C~83G9 2018 03 18.50571 11 44 18.37 +03 05 57.9 23.8i 19EG7 T09 C~83G9 2018 03 18.56269 11 44 18.11 +03 05 59.1 23.4i 19EG7 T09 C~83G9 2018 04 24.35538 11 42 02.78 +03 20 03.4 24.0z 19EG7 T09 C~83G9 2018 04 24.44523 11 42 02.51 +03 20 05.1 23.8z 19EG7 T09 C~83G9 2018 04 24.48536 11 42 02.38 +03 20 05.6 23.4z 19EG7 T09 C~83G9 2018 04 24.48803 11 42 02.39 +03 20 05.8 23.4z 19EG7 T09 C~83G9 2019 03 02.51880 11 49 19.64 +02 31 54.1 23.2y 19EG7 T09 C~83G9 2019 03 02.55921 11 49 19.48 +02 31 55.3 23.1y 19EG7 T09 C~83G9 2019 03 02.60017 11 49 19.31 +02 31 56.1 23.1y 19EG7 T09 C~83G9 2019 03 08.36022 11 48 56.68 +02 34 24.2 24.0r 19EG7 T09 C~83G9 2019 03 08.40431 11 48 56.50 +02 34 25.4 23.8r 19EG7 T09 C~83G9 2019 03 08.43394 11 48 56.38 +02 34 25.9 24.1r 19EG7 T09 C~83G9
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 -0.05
2 0.9863 4226.86 -0.02 -78.20 -0.07
3 0.9863 4226.65 -0.01 -78.07 0.05
4 0.9864 4223.93 0.13 -77.83 0.32
5 0.9866 4219.88 -0.11 -78.28 -0.08
6 1.0873 2023.98 -0.08 -108.26 -0.05
7 1.0876 2019.59 -0.02 -108.31 0.06
8 1.0877 2017.61 -0.04 -108.62 -0.19
9 1.0877 2017.67 0.15 -108.38 0.06
10 1.9420 9183.51 0.09 -157.12 -0.03
11 1.9421 9180.83 0.01 -156.97 0.13
12 1.9422 9178.17 -0.02 -157.25 -0.14
13 1.9580 8807.42 -0.03 -156.48 0.05
14 1.9581 8804.47 -0.08 -156.45 0.10
15 1.9582 8802.61 0.03 -156.71 -0.15
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.
19EG7 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.085 44.118 44.051 ecceobj 0.079 0.078 0.079 incobj 1.743 1.743 1.743 qmin 40.015 40.054 39.969 qmax 48.747 48.771 48.702 amean 44.241 44.276 44.206 amin 43.887 43.924 43.856 amax 44.612 44.662 44.578 emean 0.076 0.076 0.077 emin 0.060 0.060 0.060 emax 0.093 0.092 0.093 imean 1.341 1.352 1.329 imin 0.509 0.530 0.483 imax 1.998 1.993 2.000 excite_mean 0.080 0.080 0.080 fracstop 1.000 1.000 1.000 cjmean 3.097 3.097 3.096 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 203.4 203.1 204.0 kozaiamp 180.0 180.0 180.0