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: 19EP7
# Created Sun Apr 27 01:11:13 2025
# Orbit generated from Bernstein formalism
# Fitting 10 observations of 10
# Arc: 31.85d
# First observation: 2019/02/04
# Last observation: 2019/03/08
Preliminary a, adot, b, bdot, g, gdot:
0.000001 0.024077 0.000001 0.000139 0.023276 0.000000
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# Chi-squared of fit: 5.58 DOF: 15 RMS: 0.13
# Min/Max residuals: -0.16 0.26
# Exact a, adot, b, bdot, g, gdot:
1.536327E-05 2.083059E-02 7.940768E-07 1.602185E-04 2.260164E-02 -7.084072E-03
# Covariance matrix:
1.5624E-12 1.7834E-09 -1.8100E-14 -1.2264E-11 3.3849E-10 1.6757E-08
1.7834E-09 2.6620E-06 -2.6888E-11 -1.8277E-08 5.0290E-07 2.4259E-05
-1.8100E-14 -2.6888E-11 3.5667E-13 -4.2916E-12 -5.0854E-12 -2.4868E-10
-1.2264E-11 -1.8277E-08 -4.2916E-12 2.2073E-10 -3.4515E-09 -1.6551E-07
3.3849E-10 5.0290E-07 -5.0854E-12 -3.4515E-09 9.5110E-08 4.6474E-06
1.6757E-08 2.4259E-05 -2.4868E-10 -1.6551E-07 4.6474E-06 2.6274E-04
# lat0 lon0 xBary yBary zBary JD0
0.877498 174.550075 0.632451 0.011764 -0.763962 2458519.083261
# Heliocentric elements and errors
Epoch: 2458510.5000 = 2019/01/27
Mean Anomaly: 303.17549 +/- 55.988
Argument of Peri: 159.22407 +/- 7.241
Long of Asc Node: 111.18427 +/- 3.396
Inclination: 0.97181 +/- 0.030
Eccentricity: 0.34669588 +/- 0.7428
Semi-Major Axis: 49.10655815 +/- 23.1694
Time of Perihelion: 2478350.4647 +/- 13599.9
Perihelion: 32.08151659 +/- 39.4917
Aphelion: 66.13159970 +/- 48.0005
Period (y) 344.1260 +/- 243.55
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.73897962 +/- 0.6009
Ecliptic Y 4.89566074 +/- 0.0574
Ecliptic Z 0.67761143 +/- 0.0092
Ecliptic XDOT 0.00062283 +/- 0.0020
Ecliptic YDOT -0.00259510 +/- 0.0001
Ecliptic ZDOT 0.00000606 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.01114249 +/- 0.5973
Geocenter to KBO 44.24458534 +/- 0.6037
# Hcoef: 8.35
The following table shows the complete astrometric record for 19EP7. 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 (19EP7) followed by the observatory code and reference code for the source of the astrometry.
2019 02 04.58246 11 41 22.94 +02 58 14.6 25.9g 19EP7 T09 C~83GA 2019 02 04.62685 11 41 22.82 +02 58 15.6 25.5g 19EP7 T09 C~83GA 2019 02 04.62894 11 41 22.81 +02 58 15.9 26.0g 19EP7 T09 C~83GA 2019 02 04.65831 11 41 22.72 +02 58 16.1 26.4g 19EP7 T09 C~83GA 2019 03 02.52701 11 39 47.55 +03 08 49.7 24.1y 19EP7 T09 C~83GA 2019 03 02.55386 11 39 47.42 +03 08 50.7 23.9y 19EP7 T09 C~83GA 2019 03 02.56997 11 39 47.35 +03 08 51.0 23.9y 19EP7 T09 C~83GA 2019 03 08.36650 11 39 23.22 +03 11 29.2 24.4r 19EP7 T09 C~83GA 2019 03 08.40012 11 39 23.08 +03 11 30.2 24.4r 19EP7 T09 C~83GA 2019 03 08.42975 11 39 22.95 +03 11 31.2 24.8r 19EP7 T09 C~83GA
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 -0.16 0.00 -0.14
2 0.0001 -2.05 0.09 0.21 0.05
3 0.0001 -2.30 -0.06 0.42 0.26
4 0.0002 -3.62 0.14 0.07 -0.10
5 0.0710 -1563.54 0.23 16.79 -0.16
6 0.0711 -1565.73 -0.12 16.93 -0.01
7 0.0711 -1566.81 -0.10 16.79 -0.15
8 0.0870 -1961.34 0.02 18.89 -0.02
9 0.0871 -1963.66 0.04 18.98 0.07
10 0.0872 -1965.84 -0.07 19.13 0.22
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.
19EP7 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