Orbit Fit and Astrometric record for 07RX326

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: 07RX326   
# Created Sun Oct 21 01:08:44 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   24 observations of   24
# Arc:  10.29y
# First observation: 2007/09/06
#  Last observation: 2017/12/20
# Chi-squared of fit:    62.24 DOF:   42 RMS:  0.28
# Min/Max residuals:    -0.65    0.75
# Exact a, adot, b, bdot, g, gdot:
  1.636659E-05  2.772302E-02  2.282744E-06  3.045909E-03  2.602364E-02  1.601506E-03
# Covariance matrix:
  1.6374E-13 -1.7434E-13  8.8878E-15 -1.0080E-14  1.3673E-14 -6.2501E-13
 -1.7434E-13  3.5342E-13 -2.2942E-14  2.0428E-14 -5.7193E-14  1.3444E-12
  8.8878E-15 -2.2942E-14  9.1574E-14 -1.3062E-14  2.6670E-14 -9.9047E-14
 -1.0080E-14  2.0428E-14 -1.3062E-14  9.9376E-15  2.7094E-15  7.7058E-14
  1.3673E-14 -5.7193E-14  2.6670E-14  2.7094E-15  1.7012E-13 -2.9055E-13
 -6.2501E-13  1.3444E-12 -9.9047E-14  7.7058E-14 -2.9055E-13  5.2688E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   24.899507  -20.603490   -0.072293    0.423190   -0.911575  2454349.808964
# Heliocentric elements and errors
Epoch:              2454350.5000  =  2007/09/07
Mean Anomaly:           18.27823 +/-     0.015
Argument of Peri:       51.17085 +/-     0.022
Long of Asc Node:      264.31595 +/-     0.000
Inclination:            25.01664 +/-     0.000
Eccentricity:         0.16028654 +/-    0.0001
Semi-Major Axis:     46.22745511 +/-    0.0055
Time of Perihelion: 2448521.6867 +/-       5.0
Perihelion:          38.81781618 +/-    0.0068
Aphelion:            53.63709403 +/-    0.0081
Period (y)              314.3100 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.59085037 +/-    0.0005
Ecliptic Y          -12.55555831 +/-    0.0002
Ecliptic Z           16.17878363 +/-    0.0003
Ecliptic XDOT         0.00104942 +/-    0.0000
Ecliptic YDOT         0.00272216 +/-    0.0000
Ecliptic ZDOT         0.00036150 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.34129193 +/-    0.0005
Geocenter to KBO     38.42660261 +/-    0.0006
# Hcoef:  7.64

The following table shows the complete astrometric record for 07RX326. 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 (07RX326) followed by the observatory code and reference code for the source of the astrometry.

2007 09  06.30821  22 06 08.27   +15 01 46.9   23.0r 07RX326   568  C~1Q3a      
2007 09  06.34967  22 06 08.07   +15 01 45.5         07RX326   568  C~1Q3a      
2007 09  06.39240  22 06 07.85   +15 01 44.2   23.6r 07RX326   568  C~1Q3a      
2007 09  07.30971  22 06 03.49   +15 01 16.0         07RX326   568  C~1Q3a      
2007 09  07.35120  22 06 03.29   +15 01 14.5         07RX326   568  C~1Q3a      
2007 09  18.29721  22 05 13.24   +14 55 03.4   23.3R 07RX326   675  C~1Q3a      
2007 09  18.35665  22 05 13.00   +14 55 01.4         07RX326   675  C~1Q3a      
2007 11  09.08175  22 03 01.20   +14 19 57.8   23.4r 07RX326   695  C~1Q3a      
2007 11  09.16439  22 03 01.19   +14 19 54.7   23.9r 07RX326   695  C~1Q3a      
2008 05  03.45034  22 16 34.86   +15 14 02.2         07RX326   695  C~1Q3a      
2008 05  04.47087  22 16 37.71   +15 14 56.5         07RX326   695  C~1Q3a      
2008 06  08.31454  22 17 16.52   +15 42 01.0         07RX326   807  C~1Q3a      
2008 06  09.36170  22 17 15.87   +15 42 40.6         07RX326   807  C~1Q3a      
2008 08  30.31000  22 12 27.26   +15 50 44.0         07RX326   568  C~1Q3b      
2008 08  30.37168  22 12 26.96   +15 50 41.9         07RX326   568  C~1Q3b      
2008 08  31.29246  22 12 22.44   +15 50 17.2         07RX326   568  C~1Q3b      
2008 10  22.08354  22 09 04.79   +15 17 31.9   23.5r 07RX326   695  C~1Q3b      
2008 10  22.13806  22 09 04.66   +15 17 29.7   23.4r 07RX326   695  C~1Q3b      
2008 10  22.22914  22 09 04.47   +15 17 25.8   23.4r 07RX326   695  C~1Q3b      
2009 06  20.42598  22 22 48.51   +16 32 50.4         07RX326   695  C~1Q3b      
2009 06  21.39259  22 22 47.00   +16 33 20.0         07RX326   695  C~1Q3b      
2009 06  22.35922  22 22 45.42   +16 33 49.1         07RX326   695  C~1Q3b      
2017 12  20.09489  23 01 19.159  +20 58 20.29  23.6R 07RX326   G37  C~2UvC      
2017 12  20.17221  23 01 19.349  +20 58 18.43        07RX326   G37  C~2UvC      

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     0.13       0.00    -0.04
  2   0.0001      0.00     0.16       0.00    -0.19
  3   0.0002      0.00    -0.02       0.00    -0.18
  4   0.0027      0.00     0.06       0.00    -0.13
  5   0.0029      0.00     0.07       0.00    -0.35
  6   0.0328      0.00     0.10       0.00    -0.36
  7   0.0330      0.00     0.45       0.00    -0.18
  8   0.1746      0.00     0.19       0.00     0.07
  9   0.1748      0.00     0.46       0.00     0.12
 10   0.6575      0.00     0.02       0.00    -0.03
 11   0.6603      0.00    -0.13       0.00     0.07
 12   0.7557      0.00    -0.29       0.00     0.14
 13   0.7585      0.00    -0.50       0.00     0.31
 14   0.9829      0.00    -0.65       0.00     0.75
 15   0.9831      0.00    -0.52       0.00     0.25
 16   0.9856      0.00    -0.57       0.00    -0.04
 17   1.1274      0.00     0.02       0.00    -0.17
 18   1.1275      0.00    -0.18       0.00    -0.05
 19   1.1278      0.00    -0.12       0.00    -0.05
 20   1.7881      0.00     0.68       0.00     0.23
 21   1.7908      0.00     0.34       0.00     0.03
 22   1.7934      0.00     0.22       0.00     0.01
 23  10.2883      0.00    -0.04       0.00    -0.16
 24  10.2885      0.00     0.07       0.00     0.01

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.

07RX326    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.363    46.363    46.363
ecceobj         0.162     0.162     0.162
incobj         25.048    25.048    25.048
qmin           38.023    38.060    38.025
qmax           54.705    54.682    54.734
amean          46.188    46.188    46.188
amin           45.794    45.805    45.789
amax           46.631    46.626    46.620
emean           0.159     0.158     0.159
emin            0.144     0.144     0.145
emax            0.174     0.173     0.174
imean          26.536    26.538    26.535
imin           26.158    26.182    26.158
imax           26.849    26.857    26.851
excite_mean     0.474     0.474     0.474
fracstop        1.000     1.000     1.000
cjmean          2.839     2.839     2.839

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       170.0     169.8     170.0
kozaiamp        180.0     180.0     180.0