Orbit Fit and Astrometric record for 97CW29

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: 97CW29    
# Created Fri Mar 29 01:09:40 2024
# Orbit generated from Bernstein formalism
# Fitting     11 observations of     11
# Arc:  27.06d
# First observation: 1997/02/08
#  Last observation: 1997/03/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000001   0.031281   0.000000   0.007472   0.025882   0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit:    22.84 DOF:     17 RMS:  0.25
# Min/Max residuals:    -0.39    0.48
# Exact a, adot, b, bdot, g, gdot:
  1.538702E-05  2.609469E-02  5.133084E-06  7.349860E-03  2.502291E-02  6.875959E-03
# Covariance matrix:
  6.6978E-13  5.7982E-10  1.3765E-15  1.6635E-11  1.0540E-10 -4.7905E-09
  5.7982E-10  7.8826E-07  2.3343E-12  2.1518E-08  1.3951E-07 -8.5746E-06
  1.3765E-15  2.3343E-12  2.1539E-13 -3.1838E-12  3.7988E-13 -4.8989E-11
  1.6635E-11  2.1518E-08 -3.1838E-12  7.3874E-10  3.8772E-09 -1.8591E-07
  1.0540E-10  1.3951E-07  3.7988E-13  3.8772E-09  2.4905E-08 -1.3701E-06
 -4.7905E-09 -8.5746E-06 -4.8989E-11 -1.8591E-07 -1.3701E-06  1.9787E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.710703  117.934579   -0.367372    0.043594   -0.923912  2450487.801940
# Heliocentric elements and errors
Epoch:              2450480.5000  =  1997/02/01
Mean Anomaly:           26.32018 +/-    20.990
Argument of Peri:      312.34065 +/-    57.759
Long of Asc Node:      109.16358 +/-     0.325
Inclination:            16.00987 +/-     0.534
Eccentricity:         0.37755635 +/-    0.4981
Semi-Major Axis:     57.39911674 +/-   23.1884
Time of Perihelion: 2438867.5509 +/-    6020.6
Perihelion:          35.72771547 +/-   32.0281
Aphelion:            79.07051800 +/-   42.8702
Period (y)              434.8766 +/-    263.53
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -19.45241033 +/-    0.1179
Ecliptic Y           35.90637252 +/-    0.2224
Ecliptic Z            1.89019421 +/-    0.0119
Ecliptic XDOT        -0.00285064 +/-    0.0007
Ecliptic YDOT        -0.00070141 +/-    0.0014
Ecliptic ZDOT         0.00083868 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   40.88076185 +/-    0.2033
Geocenter to KBO     39.96337464 +/-    0.2520
# Hcoef:  6.73

The following table shows the complete astrometric record for 97CW29. 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 (97CW29) followed by the observatory code and reference code for the source of the astrometry.

1997 02  08.30122  08 02 26.90   +23 13 48.8   22.5R 97CW29    568  C30145      
1997 02  08.34998  08 02 26.66   +23 13 49.4         97CW29    568  C30145      
1997 02  08.40345  08 02 26.40   +23 13 50.3         97CW29    568  C30145      
1997 02  09.26711  08 02 22.18   +23 14 05.0         97CW29    568  C30145      
1997 02  09.29503  08 02 22.03   +23 14 05.6         97CW29    568  C30145      
1997 02  09.32301  08 02 21.89   +23 14 06.1         97CW29    568  C30145      
1997 02  09.35228  08 02 21.77   +23 14 06.6         97CW29    568  C30145      
1997 03  03.22184  08 00 49.54   +23 19 08.3         97CW29    696  C30196      
1997 03  03.28507  08 00 49.26   +23 19 09.1         97CW29    696  C30196      
1997 03  07.27905  08 00 36.08   +23 19 50.9         97CW29    696  C30196      
1997 03  07.36241  08 00 35.80   +23 19 51.7         97CW29    696  C30196      

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     0.23       0.00    -0.10
     2   0.0001     -3.36     0.30      -0.08    -0.31
     3   0.0003     -7.05     0.38       0.07    -0.28
     4   0.0026    -66.99    -0.16       2.68     0.09
     5   0.0027    -69.14    -0.36       2.84     0.18
     6   0.0028    -71.13    -0.39       2.94     0.21
     7   0.0029    -72.85    -0.07       3.10     0.29
     8   0.0628  -1378.43     0.48      42.74    -0.16
     9   0.0629  -1382.37    -0.29      42.76    -0.20
    10   0.0739  -1568.62     0.03      47.43     0.16
    11   0.0741  -1572.55    -0.16      47.45     0.13

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.

97CW29    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