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: 19EN9
# Created Tue Apr 1 01:11:12 2025
# Orbit generated from Bernstein formalism
# Fitting 14 observations of 14
# Arc: 58.99d
# First observation: 2019/02/05
# Last observation: 2019/04/05
Preliminary a, adot, b, bdot, g, gdot:
0.000001 0.024298 -0.000001 -0.000990 0.024055 0.000000
# Chi-squared of fit: 9.15 DOF: 22 RMS: 0.14
# Min/Max residuals: -0.31 0.26
# Exact a, adot, b, bdot, g, gdot:
1.562074E-05 2.306519E-02 -5.624954E-07 -9.617703E-04 2.369995E-02 3.259696E-03
# Covariance matrix:
7.8749E-13 9.4319E-11 -1.3668E-13 -2.0795E-12 2.2499E-11 1.7055E-09
9.4319E-11 1.6644E-07 -2.0929E-10 -3.5466E-09 3.4584E-08 1.8240E-06
-1.3668E-13 -2.0929E-10 7.2922E-13 1.2080E-12 -4.3612E-11 -2.3275E-09
-2.0795E-12 -3.5466E-09 1.2080E-12 1.0484E-10 -7.3704E-10 -3.8873E-08
2.2499E-11 3.4584E-08 -4.3612E-11 -7.3704E-10 7.2057E-09 3.8440E-07
1.7055E-09 1.8240E-06 -2.3275E-09 -3.8873E-08 3.8440E-07 2.1519E-05
# lat0 lon0 xBary yBary zBary JD0
4.436074 -176.083518 0.736767 0.051431 -0.662161 2458520.090561
# Heliocentric elements and errors
Epoch: 2458520.5000 = 2019/02/06
Mean Anomaly: 59.87112 +/- 8.388
Argument of Peri: 43.79085 +/- 13.049
Long of Asc Node: 65.25167 +/- 0.449
Inclination: 4.92885 +/- 0.021
Eccentricity: 0.13047976 +/- 0.2090
Semi-Major Axis: 45.19078727 +/- 3.7353
Time of Perihelion: 2440066.5983 +/- 1204.0
Perihelion: 39.29430428 +/- 9.9871
Aphelion: 51.08727027 +/- 10.3453
Period (y) 303.7967 +/- 37.67
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -42.68138765 +/- 0.1503
Ecliptic Y -2.19179388 +/- 0.0103
Ecliptic Z 3.26354970 +/- 0.0117
Ecliptic XDOT -0.00019310 +/- 0.0005
Ecliptic YDOT -0.00268619 +/- 0.0001
Ecliptic ZDOT -0.00008185 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.86205278 +/- 0.1497
Geocenter to KBO 42.19418823 +/- 0.1511
# Hcoef: 7.48
The following table shows the complete astrometric record for 19EN9. 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 (19EN9) followed by the observatory code and reference code for the source of the astrometry.
2019 02 05.58976 12 21 25.32 +02 30 53.1 23.3i 19EN9 T09 C~8HR8 2019 02 05.63031 12 21 25.22 +02 30 54.0 23.1i 19EN9 T09 C~8HR8 2019 03 03.57141 12 19 58.17 +02 41 49.9 23.0z 19EN9 T09 C~8HR8 2019 03 03.58751 12 19 58.10 +02 41 50.4 23.5z 19EN9 T09 C~8HR8 2019 03 03.62777 12 19 57.94 +02 41 51.4 23.2z 19EN9 T09 C~8HR8 2019 03 03.64387 12 19 57.89 +02 41 51.7 23.1z 19EN9 T09 C~8HR8 2019 04 04.45230 12 17 40.89 +02 56 45.6 24.5g 19EN9 T09 C~8HR8 2019 04 04.46143 12 17 40.82 +02 56 46.0 24.6g 19EN9 T09 C~8HR8 2019 04 04.49512 12 17 40.69 +02 56 47.0 24.7g 19EN9 T09 C~8HR8 2019 04 04.49722 12 17 40.69 +02 56 47.0 24.6g 19EN9 T09 C~8HR8 2019 04 04.51607 12 17 40.58 +02 56 47.1 24.7g 19EN9 T09 C~8HR8 2019 04 05.55801 12 17 36.07 +02 57 14.5 23.8r 19EN9 T09 C~8HR8 2019 04 05.56011 12 17 36.08 +02 57 14.5 23.9r 19EN9 T09 C~8HR8 2019 04 05.57896 12 17 35.99 +02 57 15.0 23.5r 19EN9 T09 C~8HR8
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 -0.05 0.00 -0.02
2 0.0001 -1.73 0.04 0.23 0.06
3 0.0711 -1459.36 -0.05 84.22 0.03
4 0.0712 -1460.52 -0.13 84.27 0.04
5 0.0713 -1463.12 -0.03 84.23 -0.05
6 0.0713 -1463.93 0.24 84.21 -0.10
7 0.1584 -3703.00 0.17 90.43 0.07
8 0.1584 -3704.13 -0.31 90.38 0.04
9 0.1585 -3706.31 -0.09 90.53 0.26
10 0.1585 -3706.31 0.06 90.53 0.26
11 0.1586 -3707.86 -0.15 89.97 -0.26
12 0.1614 -3780.77 -0.05 88.33 -0.14
13 0.1615 -3780.64 0.23 88.39 -0.07
14 0.1615 -3782.07 0.13 88.32 -0.11
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.
19EN9 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0