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: 19EN7
# Created Mon Apr 28 01:11:13 2025
# Orbit generated from Bernstein formalism
# Fitting 16 observations of 16
# Arc: 2.19y
# First observation: 2016/12/29
# Last observation: 2019/03/08
Preliminary a, adot, b, bdot, g, gdot:
-0.000015 0.023214 0.000003 -0.001027 0.024040 0.000000
# Chi-squared of fit: 4.83 DOF: 26 RMS: 0.10
# Min/Max residuals: -0.19 0.30
# Exact a, adot, b, bdot, g, gdot:
1.523058E-05 2.276354E-02 -6.472077E-07 -1.006714E-03 2.360725E-02 -3.794080E-04
# Covariance matrix:
1.4580E-12 -2.7692E-12 -4.5269E-14 1.1086E-13 -1.6701E-12 -4.7808E-11
-2.7692E-12 3.1238E-11 5.2713E-13 -1.5243E-12 2.8786E-11 6.3118E-10
-4.5269E-14 5.2713E-13 7.2045E-13 -4.3035E-13 4.8519E-13 1.0738E-11
1.1086E-13 -1.5243E-12 -4.3035E-13 3.3781E-13 -1.4216E-12 -3.1063E-11
-1.6701E-12 2.8786E-11 4.8519E-13 -1.4216E-12 2.7243E-11 5.8691E-10
-4.7808E-11 6.3118E-10 1.0738E-11 -3.1063E-11 5.8691E-10 1.2862E-08
# lat0 lon0 xBary yBary zBary JD0
2.253654 173.951557 0.958988 0.009374 -0.232579 2457751.846162
# Heliocentric elements and errors
Epoch: 2457750.5000 = 2016/12/28
Mean Anomaly: 287.14219 +/- 1.073
Argument of Peri: 215.30927 +/- 1.581
Long of Asc Node: 34.78240 +/- 0.015
Inclination: 3.33885 +/- 0.001
Eccentricity: 0.04158739 +/- 0.0049
Semi-Major Axis: 43.06490167 +/- 0.0252
Time of Perihelion: 2478641.4033 +/- 307.0
Perihelion: 41.27394468 +/- 0.2116
Aphelion: 44.85585865 +/- 0.2119
Period (y) 282.6138 +/- 0.25
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -42.22535609 +/- 0.0093
Ecliptic Y 5.43359227 +/- 0.0010
Ecliptic Z 1.66564745 +/- 0.0004
Ecliptic XDOT -0.00023643 +/- 0.0000
Ecliptic YDOT -0.00263617 +/- 0.0000
Ecliptic ZDOT -0.00011845 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.60609116 +/- 0.0092
Geocenter to KBO 42.35986304 +/- 0.0094
# Hcoef: 7.45
The following table shows the complete astrometric record for 19EN7. 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 (19EN7) followed by the observatory code and reference code for the source of the astrometry.
2016 12 29.345373 11 41 22.123 +04 28 16.68 24.1z 19EN7 W84 C~8HR7 2018 03 18.47675 11 42 07.21 +04 21 25.7 23.6i 19EN7 T09 C~83G9 2018 03 18.57604 11 42 06.75 +04 21 28.5 23.6i 19EN7 T09 C~83G9 2018 03 18.60275 11 42 06.64 +04 21 29.0 23.2i 19EN7 T09 C~83G9 2018 04 12.106153 11 40 22.301 +04 32 05.82 23.8V 19EN7 W84 C~8HR7 2018 04 13.103871 11 40 18.442 +04 32 28.46 24.1V 19EN7 W84 C~8HR7 2018 04 24.36908 11 39 38.21 +04 36 18.7 23.4z 19EN7 T09 C~83G9 2018 04 24.41221 11 39 38.07 +04 36 19.5 23.5z 19EN7 T09 C~83G9 2018 04 24.45594 11 39 37.92 +04 36 20.3 24.0z 19EN7 T09 C~83G9 2018 04 24.49606 11 39 37.80 +04 36 21.3 23.2z 19EN7 T09 C~83G9 2019 03 02.43089 11 48 07.63 +03 38 41.3 23.0y 19EN7 T09 C~83G9 2019 03 02.44784 11 48 07.55 +03 38 41.8 23.3y 19EN7 T09 C~83G9 2019 03 02.53236 11 48 07.18 +03 38 44.3 23.2y 19EN7 T09 C~83G9 2019 03 08.34835 11 47 41.89 +03 41 28.7 23.7r 19EN7 T09 C~83G9 2019 03 08.37068 11 47 41.80 +03 41 29.4 23.7r 19EN7 T09 C~83G9 2019 03 08.40431 11 47 41.66 +03 41 30.4 23.5r 19EN7 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 -0.01
2 1.2160 782.03 0.03 -109.61 0.02
3 1.2162 774.61 -0.10 -109.77 -0.02
4 1.2163 772.90 0.15 -109.96 -0.19
5 1.2834 -912.08 -0.16 -144.45 -0.00
6 1.2861 -974.03 -0.14 -146.54 0.00
7 1.3170 -1617.60 0.03 -173.57 -0.04
8 1.3171 -1619.84 0.08 -173.67 -0.01
9 1.3172 -1622.22 0.02 -173.82 -0.03
10 1.3173 -1624.26 0.09 -173.61 0.30
11 2.1713 6752.59 0.07 -316.66 -0.00
12 2.1714 6751.29 -0.02 -316.68 -0.02
13 2.1716 6745.21 -0.08 -316.59 0.10
14 2.1876 6332.06 -0.11 -316.72 -0.15
15 2.1876 6330.55 0.00 -316.61 -0.03
16 2.1877 6328.22 0.13 -316.53 0.07
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.
19EN7 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.701 42.740 42.672 ecceobj 0.037 0.049 0.028 incobj 3.348 3.349 3.348 qmin 40.653 40.170 41.007 qmax 45.250 45.781 44.815 amean 42.852 42.895 42.820 amin 42.521 42.559 42.495 amax 43.184 43.238 43.147 emean 0.029 0.040 0.021 emin 0.009 0.020 0.001 emax 0.048 0.059 0.039 imean 2.411 2.413 2.408 imin 1.386 1.362 1.380 imax 3.331 3.341 3.323 excite_mean 0.051 0.059 0.047 fracstop 1.000 1.000 1.000 cjmean 3.085 3.084 3.085 libcent 0 -180.0 174.0 -180.0 libamp 0 -180.0 163.0 -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 195.1 198.2 190.4 kozaiamp 179.9 180.0 180.0