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 Fri Dec  3 02:10:36 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     20 observations of     20
# Arc:  13.04y
# First observation: 2007/09/06
#  Last observation: 2020/09/21
# Chi-squared of fit:    26.09 DOF:     34 RMS:  0.20
# Min/Max residuals:    -0.50    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.897407E-05  3.435175E-02  2.338557E-06  3.050012E-03  2.925522E-02  4.834992E-04
# Covariance matrix:
  2.5039E-13 -2.4949E-13  1.9316E-14 -2.1874E-14  9.8800E-14 -5.0386E-13
 -2.4949E-13  3.7372E-13 -3.0699E-14  3.3757E-14 -1.7569E-13  7.7778E-13
  1.9316E-14 -3.0699E-14  9.7947E-14 -1.2952E-14  3.3431E-14 -6.5462E-14
 -2.1874E-14  3.3757E-14 -1.2952E-14  7.7578E-15 -1.6753E-14  7.1172E-14
  9.8800E-14 -1.7569E-13  3.3431E-14 -1.6753E-14  5.6291E-13 -3.8975E-13
 -5.0386E-13  7.7778E-13 -6.5462E-14  7.1172E-14 -3.8975E-13  1.6400E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   20.469678  -20.349741   -0.067754    0.351628   -0.941834  2454349.803924
# Heliocentric elements and errors
Epoch:              2454350.5000  =  2007/09/07
Mean Anomaly:            3.00512 +/-     0.006
Argument of Peri:       71.43589 +/-     0.010
Long of Asc Node:      264.18532 +/-     0.000
Inclination:            20.49040 +/-     0.000
Eccentricity:         0.23771705 +/-    0.0001
Semi-Major Axis:     46.04662343 +/-    0.0083
Time of Perihelion: 2453397.8034 +/-       1.8
Perihelion:          35.10055577 +/-    0.0084
Aphelion:            56.99269110 +/-    0.0117
Period (y)              312.4675 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.99037918 +/-    0.0008
Ecliptic Y          -11.42648104 +/-    0.0003
Ecliptic Z           11.95392362 +/-    0.0003
Ecliptic XDOT         0.00107040 +/-    0.0000
Ecliptic YDOT         0.00303251 +/-    0.0000
Ecliptic ZDOT         0.00028314 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.12639479 +/-    0.0007
Geocenter to KBO     34.18196302 +/-    0.0009
# 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  31.29921  22 21 37.35   +11 58 27.4         07RW326   568  C~59eo      
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      
2020 09  21.149750 23 48 21.074  +21 21 08.55  25.0G 07RW326   G37  C~49WY      
2020 09  21.200280 23 48 20.804  +21 21 06.82        07RW326   G37  C~49WY      

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    -0.02       0.00    -0.16
     2   0.0001      0.00     0.26       0.00    -0.22
     3   0.0002      0.00     0.22       0.00    -0.22
     4   0.0329      0.00     0.01       0.00     0.13
     5   0.0330      0.00     0.25       0.00    -0.02
     6   0.0330      0.00     0.01       0.00    -0.23
     7   0.9829      0.00     0.05       0.00     0.23
     8   0.9829      0.00     0.03       0.00     0.22
     9   0.9830      0.00     0.01       0.00    -0.50
    10   0.9830      0.00    -0.17       0.00     0.10
    11   0.9831      0.00    -0.01       0.00    -0.31
    12   0.9831      0.00    -0.34       0.00     0.18
    13   0.9856      0.00    -0.26       0.00    -0.26
    14   0.9856      0.00    -0.14       0.00     0.03
    15   1.1274      0.00    -0.06       0.00     0.19
    16   1.1277      0.00    -0.12       0.00     0.31
    17   1.7907      0.00    -0.03       0.00     0.38
    18   1.7909      0.00     0.17       0.00     0.29
    19  13.0427      0.00    -0.02       0.00     0.01
    20  13.0428      0.00     0.05       0.00    -0.12

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        46.204    46.204    46.204
ecceobj         0.240     0.240     0.240
incobj         20.516    20.516    20.516
qmin           34.443    34.490    34.337
qmax           57.997    58.121    58.099
amean          46.006    46.013    46.006
amin           45.562    45.590    45.579
amax           46.496    46.528    46.513
emean           0.229     0.229     0.230
emin            0.207     0.209     0.213
emax            0.248     0.249     0.251
imean          22.298    22.313    22.274
imin           21.728    21.673    21.675
imax           22.917    22.953    22.842
excite_mean     0.443     0.443     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       174.3     175.9     179.8
kozaiamp        179.9     180.0     180.0