Orbit Fit and Astrometric record for 19EP7

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 Tue Apr  1 01:11:12 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