Orbit Fit and Astrometric record for 07NC7

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: 07NC7     
# Created Mon Dec 22 02:38:02 2014
# Orbit generated from Bernstein formalism
# Fitting   28 observations of   29
# Arc:   5.09y
# First observation: 2007/07/11
#  Last observation: 2012/08/13
Preliminary a, adot, b, bdot, g, gdot:
   0.001751   0.072578   0.000191   0.007861   0.052125   0.000000
# Chi-squared of fit:    82.86 DOF:   50 RMS:  0.30
# Min/Max residuals:    -0.84    0.71
# Exact a, adot, b, bdot, g, gdot:
  2.404085E-05  7.904497E-02  1.872597E-06  8.656273E-03  5.144494E-02  2.970300E-02
# Covariance matrix:
  1.8010E-13 -1.0244E-13  2.8693E-15 -1.0312E-14  2.2955E-13 -2.8515E-13
 -1.0244E-13  2.5782E-13 -7.4186E-15  2.8176E-14 -4.5084E-14  7.8551E-13
  2.8693E-15 -7.4186E-15  8.0893E-14 -2.4200E-14  2.5575E-15 -2.4739E-14
 -1.0312E-14  2.8176E-14 -2.4200E-14  2.4476E-14 -7.9933E-15  9.3780E-14
  2.2955E-13 -4.5084E-14  2.5575E-15 -7.9933E-15  6.3881E-13 -2.1597E-13
 -2.8515E-13  7.8551E-13 -2.4739E-14  9.3780E-14 -2.1597E-13  2.6137E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.451261  -47.336567    0.410266   -0.023403   -0.925488  2454292.879484
# Heliocentric elements and errors
Epoch:              2454290.5000  =  2007/07/09
Mean Anomaly:           19.23696 +/-     0.004
Argument of Peri:      287.10492 +/-     0.004
Long of Asc Node:      324.14387 +/-     0.000
Inclination:             6.30065 +/-     0.000
Eccentricity:         0.50818686 +/-    0.0001
Semi-Major Axis:     34.40408821 +/-    0.0050
Time of Perihelion: 2450351.8504 +/-       0.2
Perihelion:          16.92038271 +/-    0.0032
Aphelion:            51.88779370 +/-    0.0078
Period (y)              201.8010 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           13.49369736 +/-    0.0002
Ecliptic Y          -15.25248641 +/-    0.0002
Ecliptic Z           -0.49222327 +/-    0.0000
Ecliptic XDOT         0.00417845 +/-    0.0000
Ecliptic YDOT         0.00167798 +/-    0.0000
Ecliptic ZDOT         0.00042040 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   20.37057912 +/-    0.0002
Geocenter to KBO     19.43825763 +/-    0.0003
# Hcoef:  8.13

The following table shows the complete astrometric record for 07NC7. 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 (07NC7) followed by the observatory code and reference code for the source of the astrometry.

2007 07  11.37873  21 02 14.20   -18 23 59.6   21.4R 07NC7     675  Cv4527      
2007 07  11.42218  21 02 13.83   -18 24 00.7   21.4R 07NC7     675  Cv4527      
2007 07  12.31282  21 02 06.60   -18 24 27.6   21.8R 07NC7     675  Cv4527      
2007 07  12.35789  21 02 06.23   -18 24 30.1   21.3R 07NC7     675  Cv4527      
2007 07  24.28223  21 00 23.36   -18 30 58.2         07NC7     675  Cv4527      
2007 07  24.33853  21 00 22.87   -18 30 59.8         07NC7     675  Cv4527      
2007 07  24.41108  21 00 22.20   -18 31 02.0         07NC7     675  Cv4527      
2007 08  07.24444  20 58 15.51   -18 38 43.2         07NC7     675  Cv4527      
2007 08  07.29968  20 58 14.94   -18 38 44.2         07NC7     675  Cv4527      
2007 08  07.37575  20 58 14.27   -18 38 46.9         07NC7     675  Cv4527      
2007 08  20.20228  20 56 18.06   -18 45 30.0   21.0R 07NC7     675  Cz1397      
2007 08  20.24391  20 56 17.71   -18 45 30.2   20.8R 07NC7     675  Cz1397      
2007 08  21.19766  20 56 09.39   -18 45 58.6   20.9R 07NC7     675  Cz1397      
2007 08  21.20312  20 56 09.34   -18 45 59.2         07NC7     675  Cv4527      
2007 08  21.24138  20 56 08.99   -18 45 59.8   20.9R 07NC7     675  Cz1397      
2007 08  21.25722  20 56 08.86   -18 46 00.7         07NC7     675  Cv4527      
2007 08  21.31080  20 56 08.40   -18 46 02.2         07NC7     675  Cv4527      
2008 06  07.41506  21 22 13.68   -16 26 24.3         07NC7     675  Cz1397      
2008 06  09.41025  21 22 07.77   -16 26 47.3         07NC7     675  Cz1397      
2008 07  26.27992  21 17 10.97   -16 47 04.7         07NC7     675  Cz2998      
2008 07  26.44753  21 17 09.49   -16 47 10.8         07NC7     675  Cz2998      
2009 07  27.28230  21 33 01.62   -15 03 13.9   21.5R 07NC7     688  C~07sE      
2009 07  27.34166  21 33 01.13   -15 03 15.8         07NC7     688  C~07sE      
2010 08  17.03007  21 45 03.845  -13 33 48.81  21.0  07NC7     809  C~0Mu9      
2010 08  17.11749  21 45 03.113  -13 33 52.02  21.0  07NC7     809  C~0Mu9      
2010 08  17.22705  21 45 02.153  -13 33 56.52  21.5  07NC7     809  C~0Mu9      
2012 08  13.42209  22 12 21.520  -10 16 20.87  22.2w 07NC7     F51  c~0i3h      
2012 08  13.43662  22 12 21.369  -10 16 21.00  21.8w 07NC7     F51  c~0i3h      
2012 08  13.46587  22 12 21.125  -10 16 22.67  21.9w 07NC7     F51  c~0i3h      

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     0.05       0.00     0.16
  2   0.0001     -5.36    -0.02       0.44     0.44
  3   0.0026   -111.67 (   0.36)      3.87 (   1.19)
  4   0.0027   -117.43     0.14       2.97     0.13
  5   0.0353  -1631.10    -0.01      44.60    -0.55
  6   0.0355  -1638.24     0.40      45.03    -0.37
  7   0.0357  -1648.00     0.37      45.61    -0.14
  8   0.0736  -3506.67     0.16     107.64    -0.84
  9   0.0737  -3514.73    -0.31     108.94     0.16
 10   0.0739  -3524.63     0.23     109.00    -0.22
 11   0.1090  -5223.52    -0.66     179.89    -0.21
 12   0.1091  -5228.36    -0.08     181.08     0.71
 13   0.1118  -5349.86     0.07     186.41     0.30
 14   0.1118  -5350.71    -0.08     186.02    -0.11
 15   0.1119  -5355.65    -0.07     186.82     0.44
 16   0.1119  -5357.68    -0.05     186.46    -0.02
 17   0.1121  -5364.37     0.18     186.83    -0.02
 18   0.9091  18536.11     0.18    1646.02     0.12
 19   0.9145  18447.43    -0.41    1650.41     0.30
 20   1.0429  13985.76     0.00    1795.60     0.08
 21   1.0433  13963.56    -0.24    1796.22    -0.11
 22   2.0449  29129.97    -0.28    3454.43     0.08
 23   2.0451  29122.49    -0.17    3454.91     0.28
 24   3.1010  41151.82     0.32    5134.82    -0.36
 25   3.1013  41140.25     0.49    5135.33    -0.24
 26   3.1016  41124.96    -0.01    5135.72    -0.39
 27   5.0925  69780.77     0.33    8175.35    -0.14
 28   5.0926  69778.40    -0.05    8176.05     0.49
 29   5.0926  69773.98    -0.48    8175.73     0.04

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.

07NC7    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        33.969    33.970    33.969
ecceobj         0.502     0.502     0.502
incobj          6.306     6.306     6.306
qmin           16.784    16.789    16.665
qmax           53.850    58.405    54.015
amean          34.678    36.648    34.673
amin           33.911    33.912    33.910
amax           35.489    37.893    35.480
emean           0.512     0.527     0.514
emin            0.502     0.502     0.502
emax            0.521     0.541     0.522
imean           7.507     7.077     7.541
imin            7.460     6.388     7.463
imax            7.633     7.851     7.633
excite_mean     0.528     0.542     0.530
fracstop        0.001     0.020     0.001
cjmean          2.695     2.682     2.692

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       293.8     180.5     295.4
kozaiamp          5.3     179.1       7.7