Orbit Fit and Astrometric record for 99GS46

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: 99GS46    
# Created Sat Oct 21 01:37:02 2017
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   32
# Arc:  17.13y
# First observation: 1999/04/12
#  Last observation: 2016/05/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000209   0.022193   0.000039  -0.002010   0.024131   0.000000
# WARNING MRQMIN stopped after  17 iterations -- oscilliatory solution
# Chi-squared of fit:   161.10 DOF:   54 RMS:  0.41
# Min/Max residuals:    -0.93    1.06
# Exact a, adot, b, bdot, g, gdot:
  1.068313E-05  2.210760E-02  1.393486E-07 -2.003989E-03  2.330960E-02  1.891951E-03
# Covariance matrix:
  1.0815E-13 -1.5724E-14 -1.3270E-15  1.1899E-15  1.0641E-13 -4.2050E-14
 -1.5724E-14  1.8310E-14  1.5047E-15 -1.3891E-15  4.1061E-14  4.6069E-14
 -1.3270E-15  1.5047E-15  7.4116E-14 -7.5293E-15  1.4879E-15  4.6358E-15
  1.1899E-15 -1.3891E-15 -7.5293E-15  2.3184E-15 -1.5235E-15 -4.2582E-15
  1.0641E-13  4.1061E-14  1.4879E-15 -1.5235E-15  6.4983E-13  3.9471E-14
 -4.2050E-14  4.6069E-14  4.6358E-15 -4.2582E-15  3.9471E-14  1.4280E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.102632 -154.459949    0.068412   -0.002007   -1.007802  2451280.635053
# Heliocentric elements and errors
Epoch:              2451280.5000  =  1999/04/12
Mean Anomaly:           79.13813 +/-     0.055
Argument of Peri:       92.41766 +/-     0.068
Long of Asc Node:       24.35244 +/-     0.000
Inclination:             5.19767 +/-     0.000
Eccentricity:         0.08358774 +/-    0.0000
Semi-Major Axis:     44.29439193 +/-    0.0060
Time of Perihelion: 2427610.1411 +/-      15.6
Perihelion:          40.59192368 +/-    0.0055
Aphelion:            47.99686018 +/-    0.0065
Period (y)              294.8026 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -39.63908578 +/-    0.0013
Ecliptic Y          -18.86887784 +/-    0.0006
Ecliptic Z           -0.07686004 +/-    0.0000
Ecliptic XDOT         0.00091702 +/-    0.0000
Ecliptic YDOT        -0.00242977 +/-    0.0000
Ecliptic ZDOT        -0.00023576 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.90099748 +/-    0.0012
Geocenter to KBO     42.90077660 +/-    0.0015
# Hcoef:  6.69

The following table shows the complete astrometric record for 99GS46. 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 (99GS46) followed by the observatory code and reference code for the source of the astrometry.

1999 04  12.13431  13 34 32.37   -09 58 13.9         99GS46    809  Ca5906      
1999 04  12.14679  13 34 32.30   -09 58 13.2   23. V 99GS46    809  Ca5906      
1999 04  12.15905  13 34 32.25   -09 58 13.0         99GS46    809  Ca5906      
1999 04  13.14896  13 34 27.84   -09 57 49.0         99GS46    809  Ca5906      
1999 04  13.16127  13 34 27.78   -09 57 48.1         99GS46    809  Ca5906      
1999 04  13.17359  13 34 27.72   -09 57 48.0         99GS46    809  Ca5906      
1999 05  16.96971  13 32 05.63   -09 44 43.8         99GS46    809  Ca5906      
1999 05  17.01077  13 32 05.47   -09 44 42.9   22.6R 99GS46    809  Ca5906      
1999 05  17.11468  13 32 05.10   -09 44 41.1         99GS46    809  Ca5906      
1999 05  17.16571  13 32 04.91   -09 44 40.3   22.8R 99GS46    809  Ca5906      
1999 05  17.21628  13 32 04.70   -09 44 39.5         99GS46    809  Ca5906      
1999 05  17.27549  13 32 04.47   -09 44 38.3         99GS46    809  Ca5906      
2000 03  31.55654  13 39 55.65   -10 36 17.3   22.9R 99GS46    568  Cb1943      
2000 03  31.58034  13 39 55.55   -10 36 16.8   22.9R 99GS46    568  Cb1943      
2000 04  02.53233  13 39 47.22   -10 35 32.3   22.9R 99GS46    568  Cb1943      
2000 04  02.56170  13 39 47.11   -10 35 31.7   22.9R 99GS46    568  Cb1943      
2000 04  02.57414  13 39 47.01   -10 35 30.5   22.9R 99GS46    568  Cb1943      
2000 04  02.60325  13 39 46.91   -10 35 29.7   22.9R 99GS46    568  Cb1943      
2000 05  02.45255  13 37 36.12   -10 23 38.7   23.1R 99GS46    568  Cb5144      
2000 05  02.50806  13 37 35.87   -10 23 37.8   23.0R 99GS46    568  Cb5144      
2003 04  29.45770  13 51 41.88   -12 04 40.5   22.7R 99GS46    568  Ch9557      
2003 04  30.49485  13 51 37.33   -12 04 16.2         99GS46    568  Ch9557      
2006 04  26.20492  14 05 49.03   -13 41 59.7   21.4R 99GS46    807  Cr3547      
2006 04  26.29101  14 05 48.64   -13 41 57.5         99GS46    807  Cr3547      
2006 05  26.227500 14 03 43.34   -13 31 21.0         99GS46    645  C~1eMn      
2006 05  26.230817 14 03 43.33   -13 31 20.9         99GS46    645  C~1eMn      
2006 05  26.283289 14 03 43.34   -13 31 21.0         99GS46    645  C~1eMn      
2006 05  27.236215 14 03 39.65   -13 31 02.0         99GS46    645  C~1eMn      
2006 05  27.237037 14 03 39.65   -13 31 02.0         99GS46    645  C~1eMn      
2006 05  27.239525 14 03 39.65   -13 31 01.9         99GS46    645  C~1eMn      
2016 05  29.21246  14 49 51.718  -18 21 48.76  23.1R 99GS46    G37              
2016 05  29.28244  14 49 51.423  -18 21 47.46        99GS46    G37              

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     0.89       0.00    -0.31
  2   0.0000     -1.22     0.55       0.28    -0.01
  3   0.0001     -1.98     0.66       0.19    -0.08
  4   0.0028    -71.40     0.40      -1.20    -0.34
  5   0.0028    -72.55     0.12      -0.69     0.19
  6   0.0028    -73.41     0.14      -0.92    -0.02
  7   0.0954  -2314.75    -0.30     -37.99    -0.11
  8   0.0955  -2317.29    -0.41     -38.02    -0.08
  9   0.0958  -2323.04    -0.02     -38.35    -0.25
 10   0.0959  -2325.94     0.09     -38.63    -0.46
 11   0.0960  -2329.13    -0.11     -39.02    -0.79
 12   0.0962  -2332.73    -0.24     -39.15    -0.84
 13   0.9704   5275.57    -0.53    -398.75     0.90
 14   0.9704   5274.01    -0.48    -398.81     0.87
 15   0.9758   5143.33    -0.26    -401.58     0.44
 16   0.9758   5141.60     0.03    -401.61     0.46
 17   0.9759   5139.79    -0.93    -401.02     1.06
 18   0.9760   5138.12 (  -0.61)   -400.81 (   1.32)
 19   1.0577   3081.67    -0.03    -435.01     0.52
 20   1.0578   3077.91    -0.04    -435.51     0.09
 21   4.0474  16906.03     0.16   -1662.27    -0.10
 22   4.0503  16834.53     0.11   -1662.93     0.24
 23   7.0392  30734.63     0.03   -2890.67    -0.01
 24   7.0394  30728.40    -0.04   -2890.51     0.25
 25   7.1214  28753.68     0.01   -2909.49    -0.42
 26   7.1214  28753.51     0.03   -2909.44    -0.37
 27   7.1216  28753.68 (   3.30)  -2909.49 (  -0.39)
 28   7.1242  28695.50    -0.01   -2909.87    -0.49
 29   7.1242  28695.50     0.04   -2909.87    -0.49
 30   7.1242  28695.46     0.15   -2909.78    -0.40
 31  17.1309  75031.11     0.01   -7133.63     0.24
 32  17.1311  75026.13    -0.02   -7133.56     0.27

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.

99GS46    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.301    44.319    44.283
ecceobj         0.085     0.085     0.085
incobj          5.196     5.196     5.196
qmin           39.777    39.812    39.678
qmax           49.731    49.750    49.810
amean          44.618    44.636    44.599
amin           44.255    44.279    44.236
amax           45.000    45.029    44.998
emean           0.090     0.089     0.091
emin            0.075     0.074     0.074
emax            0.106     0.105     0.107
imean           4.859     4.851     4.884
imin            4.147     4.156     4.135
imax            5.471     5.441     5.505
excite_mean     0.123     0.123     0.125
fracstop        1.000     1.000     1.000
cjmean          3.090     3.091     3.090

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       179.3     180.8     177.1
kozaiamp        179.9     180.0     180.0