Orbit Fit and Astrometric record for 17OR146

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: 17OR146   
# Created Fri Nov  1 01:10:35 2024
# Orbit generated from Bernstein formalism
# Fitting     17 observations of     17
# Arc:   1.03d
# First observation: 2017/07/23
#  Last observation: 2017/07/24
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# Chi-squared of fit:     1.77 DOF:     30 RMS:  0.06
# Min/Max residuals:    -0.12    0.12
# Exact a, adot, b, bdot, g, gdot:
  1.321986E-05  2.317665E-02  9.872440E-06  1.622229E-02  2.726070E-02  0.000000E+00
# Covariance matrix:
  7.4018E-11  1.2680E-07 -6.9566E-14  3.4910E-11  2.1338E-08  0.0000E+00
  1.2680E-07  2.1760E-04 -1.1931E-10  5.9780E-08  3.6600E-05  0.0000E+00
 -6.9566E-14 -1.1931E-10  8.6754E-14 -5.2501E-12 -2.0078E-11  0.0000E+00
  3.4910E-11  5.9780E-08 -5.2501E-12  9.7119E-08  1.0074E-08  0.0000E+00
  2.1338E-08  3.6600E-05 -2.0078E-11  1.0074E-08  6.1588E-06  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  2.6658E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.109092  -42.880701    0.284160   -0.001772   -0.972104  2457957.955271
# Heliocentric elements and errors
Epoch:              2457950.5000  =  2017/07/16
Mean Anomaly:          352.32878 +/-   120.505
Argument of Peri:        7.87914 +/-   187.279
Long of Asc Node:      316.82995 +/-     0.057
Inclination:            35.00164 +/-    17.143
Eccentricity:         0.02681704 +/-    0.5992
Semi-Major Axis:     38.68539775 +/-   20.4029
Time of Perihelion: 2459823.2552 +/-  293072.4
Perihelion:          37.64796995 +/-   30.5216
Aphelion:            39.72282555 +/-   31.2446
Period (y)              240.6184 +/-    190.36
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.39677653 +/-    2.4469
Ecliptic Y          -25.83628573 +/-    2.2726
Ecliptic Z           -0.06942206 +/-    0.0063
Ecliptic XDOT         0.00159078 +/-    0.0015
Ecliptic YDOT         0.00169766 +/-    0.0015
Ecliptic ZDOT         0.00162913 +/-    0.0002
# Distances at JD0 (AU)
Heliocenter to KBO   37.65769302 +/-    2.3664
Geocenter to KBO     36.68284527 +/-    3.3394
# Hcoef:  9.28

The following table shows the complete astrometric record for 17OR146. 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 (17OR146) followed by the observatory code and reference code for the source of the astrometry.

2017 07  23.45447  21 18 24.79   -15 48 30.7   25.3r 17OR146   568  C~7gvM      
2017 07  23.46701  21 18 24.71   -15 48 30.8   25.1r 17OR146   568  C~7gvM      
2017 07  23.47014  21 18 24.70   -15 48 30.9   24.8r 17OR146   568  C~7gvM      
2017 07  23.47955  21 18 24.65   -15 48 30.9   25.4r 17OR146   568  C~7gvM      
2017 07  23.49643  21 18 24.56   -15 48 31.3   25.1r 17OR146   568  C~7gvM      
2017 07  23.50898  21 18 24.49   -15 48 31.4   24.7r 17OR146   568  C~7gvM      
2017 07  23.52152  21 18 24.42   -15 48 31.6   24.5r 17OR146   568  C~7gvM      
2017 07  23.52779  21 18 24.38   -15 48 31.8   24.9r 17OR146   568  C~7gvM      
2017 07  23.55048  21 18 24.26   -15 48 32.1   24.8r 17OR146   568  C~7gvM      
2017 07  23.56304  21 18 24.19   -15 48 32.2   25.5r 17OR146   568  C~7gvM      
2017 07  23.56931  21 18 24.16   -15 48 32.3   25.0r 17OR146   568  C~7gvM      
2017 07  23.58502  21 18 24.07   -15 48 32.6   24.7r 17OR146   568  C~7gvM      
2017 07  23.59757  21 18 24.00   -15 48 32.7   24.7r 17OR146   568  C~7gvM      
2017 07  23.60385  21 18 23.97   -15 48 32.9   24.8r 17OR146   568  C~7gvM      
2017 07  24.34315  21 18 20.01   -15 48 44.0   24.8r 17OR146   568  C~7gvM      
2017 07  24.44073  21 18 19.49   -15 48 45.6   24.7r 17OR146   568  C~7gvM      
2017 07  24.48162  21 18 19.25   -15 48 46.1   25.0r 17OR146   568  C~7gvM      

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    -0.10
     2   0.0000     -1.13    -0.09       0.25     0.04
     3   0.0000     -1.30    -0.00       0.20    -0.04
     4   0.0001     -1.99     0.06       0.42     0.09
     5   0.0001     -3.35     0.05       0.43    -0.06
     6   0.0001     -4.34     0.05       0.64     0.03
     7   0.0002     -5.36     0.03       0.76     0.02
     8   0.0002     -5.97    -0.08       0.74    -0.05
     9   0.0003     -7.71    -0.02       0.98    -0.03
    10   0.0003     -8.71    -0.01       1.19     0.06
    11   0.0003     -9.15     0.04       1.23     0.03
    12   0.0004    -10.48    -0.04       1.34    -0.01
    13   0.0004    -11.47    -0.03       1.55     0.08
    14   0.0004    -11.95    -0.01       1.49    -0.04
    15   0.0024    -69.78    -0.05       8.22     0.04
    16   0.0027    -77.41     0.12       8.97    -0.12
    17   0.0028    -80.86    -0.06       9.54     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.

17OR146    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