Orbit Fit and Astrometric record for 99OK4

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: 99OK4     
# Created Thu Oct 19 01:37:03 2017
# Orbit generated from Bernstein formalism
# Fitting   19 observations of   20
# Arc:   3.97y
# First observation: 1999/07/19
#  Last observation: 2003/07/09
Preliminary a, adot, b, bdot, g, gdot:
   0.000007   0.017525  -0.000028  -0.010109   0.022440   0.000000
# WARNING -- MRQMIN stopped after  17 iterations
# Chi-squared of fit:    18.35 DOF:   32 RMS:  0.17
# Min/Max residuals:    -0.34    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.195921E-05  1.769630E-02 -5.967392E-06 -1.021514E-02  2.262983E-02  3.190211E-03
# Covariance matrix:
  2.9443E-13 -1.8157E-13 -1.1949E-14  3.7238E-14  5.0391E-13 -1.0080E-12
 -1.8157E-13  3.7431E-13  5.3726E-14 -1.6939E-13 -7.3253E-14  4.5555E-12
 -1.1949E-14  5.3726E-14  1.3762E-13 -8.2831E-14  2.8445E-14  8.3494E-13
  3.7238E-14 -1.6939E-13 -8.2831E-14  1.5168E-13 -9.1485E-14 -2.6356E-12
  5.0391E-13 -7.3253E-14  2.8445E-14 -9.1485E-14  1.9877E-12  2.4333E-12
 -1.0080E-12  4.5555E-12  8.3494E-13 -2.6356E-12  2.4333E-12  7.0833E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.424766  -56.734525    0.131408   -0.007697   -1.005568  2451378.843823
# Heliocentric elements and errors
Epoch:              2451370.5000  =  1999/07/11
Mean Anomaly:           97.91938 +/-     0.127
Argument of Peri:       66.06065 +/-     0.095
Long of Asc Node:      122.38815 +/-     0.000
Inclination:            29.96831 +/-     0.001
Eccentricity:         0.15440018 +/-    0.0003
Semi-Major Axis:     43.30668314 +/-    0.0116
Time of Perihelion: 2423056.7776 +/-      34.8
Perihelion:          36.62012343 +/-    0.0178
Aphelion:            49.99324285 +/-    0.0200
Period (y)              284.9972 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.68813403 +/-    0.0015
Ecliptic Y          -37.85862613 +/-    0.0023
Ecliptic Z           -0.32783812 +/-    0.0000
Ecliptic XDOT         0.00199339 +/-    0.0000
Ecliptic YDOT         0.00086783 +/-    0.0000
Ecliptic ZDOT        -0.00123865 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.19830763 +/-    0.0021
Geocenter to KBO     44.18946448 +/-    0.0028
# Hcoef:  7.54

The following table shows the complete astrometric record for 99OK4. 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 (99OK4) followed by the observatory code and reference code for the source of the astrometry.

1999 07  19.34308  20 22 40.77   -19 50 22.8   23.9R 99OK4     568  Ca7327      
1999 07  19.37141  20 22 40.62   -19 50 23.4         99OK4     568  Ca7327      
1999 07  19.39931  20 22 40.50   -19 50 23.9         99OK4     568  Ca7328      
1999 08  09.20417  20 21 04.16   -19 57 48.4   23.8R 99OK4     675  Ca7328      
1999 08  09.21328  20 21 04.12   -19 57 48.5         99OK4     675  Ca7328      
1999 08  09.22811  20 21 04.05   -19 57 49.2         99OK4     675  Ca7328      
1999 08  09.23552  20 21 04.02   -19 57 49.1         99OK4     675  Ca7328      
1999 08  09.25111  20 21 03.96   -19 57 49.4         99OK4     675  Ca7328      
1999 08  09.25873  20 21 03.91   -19 57 49.5   23.7R 99OK4     675  Ca7328      
2000 08  07.06969  20 25 56.54   -20 17 12.0         99OK4     809  Cb9102      
2000 08  07.11002  20 25 56.37   -20 17 13.0   23.7R 99OK4     809  Cb9102      
2000 08  07.14955  20 25 56.17   -20 17 13.7   23.8R 99OK4     809  Cb9102      
2000 08  08.07013  20 25 51.98   -20 17 33.0   23.5R 99OK4     809  Cb9102      
2000 08  08.10216  20 25 51.85   -20 17 34.0   23.7R 99OK4     809  Cb9102      
2000 08  08.13432  20 25 51.70   -20 17 34.5         99OK4     809  Cb9102      
2001 06  27.26981  20 33 43.95   -20 21 25.7         99OK4     304  Cd2244      
2001 06  27.34548  20 33 43.64   -20 21 27.4         99OK4     304  Cd2244      
2003 07  08.43791  20 42 26.67   -21 01 38.7   23.7R 99OK4     568  Ci2600      
2003 07  09.38701  20 42 22.67   -21 02 01.0         99OK4     568  Ci2600      
2003 07  09.45790  20 42 22.38   -21 02 03.0         99OK4     568  Ci2600      

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     0.08       0.00    -0.24
  2   0.0001     -2.20    -0.15      -0.09    -0.17
  3   0.0002     -3.96     0.03      -0.19    -0.10
  4   0.0571  -1428.68     0.03    -119.09     0.27
  5   0.0571  -1429.25     0.08    -119.06     0.36
  6   0.0572  -1430.38    -0.04    -119.51    -0.01
  7   0.0572  -1430.76     0.07    -119.32     0.22
  8   0.0572  -1431.66     0.24    -119.42     0.21
  9   0.0573  -1432.37     0.05    -119.35     0.31
 10   1.0533   2304.65    -0.16   -2210.91    -0.15
 11   1.0534   2302.09     0.04   -2211.31    -0.34
 12   1.0535   2299.19    -0.16   -2211.33    -0.15
 13   1.0561   2237.34    -0.18   -2216.13     0.05
 14   1.0562   2235.33    -0.02   -2216.67    -0.32
 15   1.0562   2233.16     0.01   -2216.65    -0.13
 16   1.9409   8627.90     0.04   -4053.09    -0.02
 17   1.9411   8623.25    -0.14   -4053.66    -0.10
 18   3.9701  15135.64 (   0.18)  -8270.58 (   0.80)
 19   3.9727  15075.40     0.02   -8277.42     0.36
 20   3.9729  15070.93     0.14   -8278.29    -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.

99OK4    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.242    43.276    43.208
ecceobj         0.155     0.155     0.154
incobj         29.994    29.994    29.995
qmin           35.834    35.873    35.837
qmax           51.054    51.173    51.002
amean          43.298    43.344    43.260
amin           42.942    42.979    42.914
amax           43.688    43.764    43.664
emean           0.153     0.153     0.152
emin            0.136     0.136     0.136
emax            0.169     0.170     0.169
imean          28.578    28.582    28.576
imin           28.204    28.188    28.201
imax           28.971    28.992    28.973
excite_mean     0.502     0.502     0.502
fracstop        1.000     1.000     1.000
cjmean          2.778     2.778     2.778

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       183.2     183.7     183.5
kozaiamp        179.9     180.0     180.0