Orbit Fit and Astrometric record for 07RW326

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: 07RW326   
# Created Tue Oct 24 01:37:43 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   17
# Arc:   1.79y
# First observation: 2007/09/06
#  Last observation: 2009/06/21
Preliminary a, adot, b, bdot, g, gdot:
   0.000073   0.034014   0.000011   0.003007   0.028615   0.000000
# Chi-squared of fit:    14.26 DOF:   28 RMS:  0.16
# Min/Max residuals:    -0.54    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.916611E-05  3.435011E-02  1.512985E-06  3.051099E-03  2.925370E-02  4.524906E-04
# Covariance matrix:
  2.5520E-13 -2.4536E-13 -3.0218E-15  1.0542E-14  1.2008E-13 -3.1150E-13
 -2.4536E-13  1.3306E-12 -6.2571E-15  1.0284E-13  1.1577E-12  2.2187E-11
 -3.0218E-15 -6.2571E-15  2.2518E-13 -1.8658E-13 -2.9888E-14 -2.4609E-13
  1.0542E-14  1.0284E-13 -1.8658E-13  2.6530E-13  2.2225E-13  2.6757E-12
  1.2008E-13  1.1577E-12 -2.9888E-14  2.2225E-13  2.5116E-12  3.0171E-11
 -3.1150E-13  2.2187E-11 -2.4609E-13  2.6757E-12  3.0171E-11  4.8680E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   20.469678  -20.349741   -0.067754    0.351628   -0.941834  2454349.803924
# Heliocentric elements and errors
Epoch:              2454340.5000  =  2007/08/28
Mean Anomaly:            2.81292 +/-     0.114
Argument of Peri:       71.70025 +/-     0.193
Long of Asc Node:      264.18955 +/-     0.003
Inclination:            20.49074 +/-     0.000
Eccentricity:         0.23770498 +/-    0.0001
Semi-Major Axis:     46.05175501 +/-    0.0110
Time of Perihelion: 2453448.5860 +/-      36.3
Perihelion:          35.10502354 +/-    0.0103
Aphelion:            56.99848647 +/-    0.0148
Period (y)              312.5198 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.99195284 +/-    0.0016
Ecliptic Y          -11.42705767 +/-    0.0006
Ecliptic Z           11.95451911 +/-    0.0006
Ecliptic XDOT         0.00106782 +/-    0.0000
Ecliptic YDOT         0.00303348 +/-    0.0000
Ecliptic ZDOT         0.00028223 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.12818405 +/-    0.0015
Geocenter to KBO     34.18371551 +/-    0.0019
# Hcoef:  8.73

The following table shows the complete astrometric record for 07RW326. 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 (07RW326) followed by the observatory code and reference code for the source of the astrometry.

2007 09  06.30317  22 13 59.14   +11 01 35.1   23.6r 07RW326   568  C~1Q3a      
2007 09  06.34456  22 13 58.94   +11 01 33.7   23.8r 07RW326   568  C~1Q3a      
2007 09  06.38735  22 13 58.71   +11 01 32.3         07RW326   568  C~1Q3a      
2007 09  18.30378  22 12 58.92   +10 54 29.4   23.8R 07RW326   675  C~1Q3a      
2007 09  18.36265  22 12 58.65   +10 54 27.0         07RW326   675  C~1Q3a      
2007 09  18.36765  22 12 58.61   +10 54 26.6         07RW326   675  C~1Q3a      
2008 08  30.31685  22 21 42.60   +11 58 56.2   23.8r 07RW326   568  C~1Q3a      
2008 08  30.32020  22 21 42.58   +11 58 56.1   24.2r 07RW326   568  C~1Q3a      
2008 08  30.34776  22 21 42.43   +11 58 54.6   24.2r 07RW326   568  C~1Q3a      
2008 08  30.35109  22 21 42.40   +11 58 55.1   24.1r 07RW326   568  C~1Q3a      
2008 08  30.37880  22 21 42.26   +11 58 53.9   24.2r 07RW326   568  C~1Q3a      
2008 08  30.38213  22 21 42.22   +11 58 54.3   24.2r 07RW326   568  C~1Q3a      
2008 08  31.30254  22 21 37.34   +11 58 27.6         07RW326   568  C~1Q3a      
2008 10  22.10211  22 17 58.38   +11 24 42.7   24.2r 07RW326   695  C~1Q3a      
2008 10  22.20202  22 17 58.13   +11 24 38.6   24.0r 07RW326   695  C~1Q3a      
2009 06  21.35041  22 33 32.89   +12 52 06.8         07RW326   695  C~1Q3a      
2009 06  21.43131  22 33 32.79   +12 52 09.1         07RW326   695  C~1Q3a      

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    -0.12       0.00     0.03
  2   0.0001     -3.26     0.12      -0.18    -0.13
  3   0.0002     -6.92     0.07      -0.18    -0.12
  4   0.0329   -982.07    -0.03     -56.41     0.28
  5   0.0330   -986.67     0.13     -57.11     0.05
  6   0.0330   -987.36    -0.17     -57.26    -0.06
  7   0.9829   7610.19     0.21     620.13     0.12
  8   0.9829   7609.88     0.18     620.15     0.13
  9   0.9830   7607.27    -0.09     619.58    -0.54
 10   0.9830   7607.05    -0.03     620.21     0.08
 11   0.9831   7604.69    -0.05     619.86    -0.36
 12   0.9831   7604.30    -0.16     620.45     0.22
 13   0.9856   7527.80    -0.04     622.45     0.01
 14   1.1274   3783.76    -0.01     -47.59     0.08
 15   1.1277   3778.81    -0.02     -50.01     0.21
 16   1.7907  18504.09    -0.07    -252.04     0.08
 17   1.7909  18503.56     0.08    -249.36    -0.08

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.

07RW326    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        46.214    46.246    46.181
ecceobj         0.241     0.241     0.240
incobj         20.516    20.516    20.516
qmin           34.059    34.439    34.520
qmax           58.548    58.122    57.965
amean          46.037    46.008    46.007
amin           45.555    45.589    45.567
amax           46.585    46.515    46.533
emean           0.237     0.238     0.231
emin            0.217     0.228     0.210
emax            0.258     0.250     0.247
imean          22.053    22.015    22.251
imin           21.502    21.640    21.823
imax           22.711    22.378    22.949
excite_mean     0.444     0.444     0.444
fracstop        1.000     1.000     1.000
cjmean          2.880     2.880     2.880

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       175.6     177.9     189.1
kozaiamp        179.9     180.0     179.9