Orbit Fit and Astrometric record for 97RY6

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: 97RY6     
# Created Sat Oct 21 01:36:57 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:  52.09d
# First observation: 1997/09/06
#  Last observation: 1997/10/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000004   0.032451  -0.000005   0.004290   0.026125   0.000000
# Chi-squared of fit:    95.59 DOF:   34 RMS:  0.39
# Min/Max residuals:    -0.85    1.09
# Exact a, adot, b, bdot, g, gdot:
  1.640054E-05  2.355174E-02  4.323838E-06  4.009777E-03  2.472432E-02  1.629340E-03
# Covariance matrix:
  2.2714E-13  2.1865E-11 -2.0200E-14  8.6071E-13  4.4100E-12  1.6064E-10
  2.1865E-11  9.1560E-08 -6.9957E-11  2.8043E-09  1.3969E-08 -5.0839E-07
 -2.0200E-14 -6.9957E-11  2.0790E-13 -3.4835E-12 -1.0708E-11  3.7785E-10
  8.6071E-13  2.8043E-09 -3.4835E-12  1.0833E-10  4.2990E-10 -1.4926E-08
  4.4100E-12  1.3969E-08 -1.0708E-11  4.2990E-10  2.1431E-09 -7.3821E-08
  1.6064E-10 -5.0839E-07  3.7785E-10 -1.4926E-08 -7.3821E-08  4.0758E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.162845   -1.817153    0.235574    0.137692   -0.961395  2450698.465781
# Heliocentric elements and errors
Epoch:              2450690.5000  =  1997/08/30
Mean Anomaly:           95.46584 +/-    10.570
Argument of Peri:      297.08551 +/-     9.630
Long of Asc Node:      318.72329 +/-     0.322
Inclination:            12.51086 +/-     0.084
Eccentricity:         0.06395012 +/-    0.0841
Semi-Major Axis:     41.00058210 +/-    0.3939
Time of Perihelion: 2425261.5203 +/-    2791.5
Perihelion:          38.37859010 +/-    3.4679
Aphelion:            43.62257409 +/-    3.4736
Period (y)              262.5386 +/-      3.78
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.98686325 +/-    0.0749
Ecliptic Y           -1.53958542 +/-    0.0024
Ecliptic Z            5.74300950 +/-    0.0108
Ecliptic XDOT         0.00020260 +/-    0.0002
Ecliptic YDOT         0.00261060 +/-    0.0000
Ecliptic ZDOT         0.00046500 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.41588392 +/-    0.0742
Geocenter to KBO     40.44601264 +/-    0.0757
# Hcoef:  7.27

The following table shows the complete astrometric record for 97RY6. 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 (97RY6) followed by the observatory code and reference code for the source of the astrometry.

1997 09  06.96505  23 40 17.67   +06 45 51.4   23.4R 97RY6     950  C30629      
1997 09  07.00791  23 40 17.50   +06 45 50.7         97RY6     950  C30629      
1997 09  07.18564  23 40 16.67   +06 45 45.8         97RY6     950  C30629      
1997 09  07.21435  23 40 16.54   +06 45 46.0         97RY6     950  C30629      
1997 09  11.05709  23 39 58.98   +06 44 11.1   22.4R 97RY6     950  C30629      
1997 09  11.08053  23 39 58.84   +06 44 10.2         97RY6     950  C30629      
1997 09  11.09755  23 39 58.79   +06 44 09.8         97RY6     950  C30629      
1997 09  11.17910  23 39 58.44   +06 44 07.7         97RY6     950  C30630      
1997 09  11.19622  23 39 58.37   +06 44 07.6         97RY6     950  C30630      
1997 09  23.25804  23 39 02.73   +06 38 43.7         97RY6     568  Ca0019      
1997 09  23.29625  23 39 02.54   +06 38 42.7         97RY6     568  Ca0019      
1997 10  05.18285  23 38 09.19   +06 32 57.3         97RY6     675  Ca0019      
1997 10  05.24847  23 38 08.93   +06 32 55.0         97RY6     675  Ca0019      
1997 10  05.31566  23 38 08.60   +06 32 53.0   23.4R 97RY6     675  Ca0019      
1997 10  27.95010  23 36 40.86   +06 22 01.3         97RY6     950  Ca0107      
1997 10  27.99852  23 36 40.67   +06 21 59.8         97RY6     950  Ca0107      
1997 10  28.03883  23 36 40.56   +06 21 58.3         97RY6     950  Ca0107      
1997 10  28.99441  23 36 37.46   +06 21 32.9         97RY6     950  Ca0107      
1997 10  29.01314  23 36 37.43   +06 21 32.3         97RY6     950  Ca0107      
1997 10  29.05009  23 36 37.27   +06 21 31.1         97RY6     950  Ca0107      

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    -0.28       0.00    -0.36
  2   0.0001     -2.60     0.23       0.37    -0.23
  3   0.0006    -15.89    -0.16       0.83    -0.73
  4   0.0007    -17.59     0.23       1.79     0.08
  5   0.0112   -295.27    -0.02      19.58     0.35
  6   0.0113   -297.55    -0.56      19.59     0.25
  7   0.0113   -298.39    -0.14      19.52     0.10
  8   0.0115   -304.01     0.26      19.68    -0.10
  9   0.0116   -305.00     0.52      20.01     0.15
 10   0.0446  -1194.26    -0.09      55.43     0.95
 11   0.0447  -1197.26    -0.23      55.65     1.09
 12   0.0773  -2064.05     0.08      58.15    -0.32
 13   0.0774  -2068.53     0.35      57.60    -0.85
 14   0.0776  -2073.83    -0.11      57.74    -0.67
 15   0.1396  -3533.50     0.12     -13.76     0.23
 16   0.1397  -3536.69    -0.33     -14.00     0.23
 17   0.1398  -3538.80    -0.15     -14.71    -0.28
 18   0.1424  -3591.34     0.03     -19.39     0.21
 19   0.1425  -3591.99     0.42     -19.76    -0.06
 20   0.1426  -3594.66    -0.19     -19.90    -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.

97RY6    quality flag:1

Type:      CLASSICAL  SCATNEAR  SCATNEAR

axisobj        40.984    44.398    39.892
ecceobj         0.060     0.191     0.087
incobj         12.538    12.303    12.677
qmin           37.369    34.824    33.840
qmax           44.360    53.657    45.734
amean          40.747    44.039    39.458
amin           40.429    43.585    38.937
amax           41.081    44.515    40.012
emean           0.060     0.185     0.086
emin            0.041     0.166     0.009
emax            0.080     0.207     0.145
imean          13.739    13.462    13.309
imin           12.244    12.434    10.674
imax           14.697    14.449    15.662
excite_mean     0.245     0.297     0.247
fracstop        1.000     1.000     1.000
cjmean          2.993     2.995     2.981

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       182.6     181.7     239.0
kozaiamp        180.0     180.0     179.9