Orbit Fit and Astrometric record for 98KS65

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: 98KS65    
# Created Thu Dec 14 02:36:57 2017
# Orbit generated from Bernstein formalism
# Fitting   55 observations of   55
# Arc:  15.38y
# First observation: 1998/05/20
#  Last observation: 2013/10/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000109   0.024186   0.000003  -0.000464   0.024379   0.000000
# Chi-squared of fit:    11.88 DOF:  104 RMS:  0.08
# Min/Max residuals:    -0.21    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.589319E-05  2.347716E-02 -7.652972E-07 -4.503107E-04  2.389157E-02  5.538648E-04
# Covariance matrix:
  3.6520E-14 -8.5340E-15 -1.5186E-17  1.9285E-16  2.9416E-14 -2.9615E-14
 -8.5340E-15  7.9644E-14  4.8671E-16 -1.4097E-15  7.7584E-14  2.1579E-13
 -1.5186E-17  4.8671E-16  2.8784E-14 -3.5048E-15  5.9066E-16  1.3752E-15
  1.9285E-16 -1.4097E-15 -3.5048E-15  5.2536E-15 -1.0132E-15 -4.2853E-15
  2.9416E-14  7.7584E-14  5.9066E-16 -1.0132E-15  2.4335E-13  1.5464E-13
 -2.9615E-14  2.1579E-13  1.3752E-15 -4.2853E-15  1.5464E-13  6.5614E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.419576  -55.564405    0.924876   -0.003251   -0.416235  2450953.823321
# Heliocentric elements and errors
Epoch:              2450950.5000  =  1998/05/17
Mean Anomaly:          359.24238 +/-     0.046
Argument of Peri:      201.36343 +/-     0.050
Long of Asc Node:      102.64086 +/-     0.003
Inclination:             1.18307 +/-     0.000
Eccentricity:         0.04015948 +/-    0.0001
Semi-Major Axis:     44.05776796 +/-    0.0033
Time of Perihelion: 2451175.2914 +/-      13.8
Perihelion:          42.28843098 +/-    0.0040
Aphelion:            45.82710494 +/-    0.0042
Period (y)              292.4435 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           23.14935399 +/-    0.0005
Ecliptic Y          -35.38839664 +/-    0.0007
Ecliptic Z           -0.30654704 +/-    0.0000
Ecliptic XDOT         0.00225627 +/-    0.0000
Ecliptic YDOT         0.00147815 +/-    0.0000
Ecliptic ZDOT        -0.00005215 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.28859394 +/-    0.0007
Geocenter to KBO     41.85575930 +/-    0.0009
# Hcoef:  7.67

The following table shows the complete astrometric record for 98KS65. 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 (98KS65) followed by the observatory code and reference code for the source of the astrometry.

1998 05  20.32259  20 27 30.36   -19 33 33.3   23.9R 98KS65    807  Ca1789      
1998 05  20.32947  20 27 30.35   -19 33 33.4   23.5R 98KS65    807  Ca1789      
1998 05  20.33656  20 27 30.35   -19 33 33.5   23.9R 98KS65    807  Ca1789      
1998 05  20.34343  20 27 30.33   -19 33 33.6   23.7R 98KS65    807  Ca1789      
1998 05  20.35031  20 27 30.32   -19 33 33.6   23.5R 98KS65    807  Ca1789      
1998 05  20.35804  20 27 30.31   -19 33 33.5   23.6R 98KS65    807  Ca1789      
1998 05  20.36498  20 27 30.30   -19 33 33.6   23.7R 98KS65    807  Ca1789      
1998 05  20.37193  20 27 30.30   -19 33 33.6   23.7R 98KS65    807  Ca1789      
1998 05  20.37885  20 27 30.29   -19 33 33.7   23.7R 98KS65    807  Ca1789      
1998 05  20.38572  20 27 30.27   -19 33 33.6   23.7R 98KS65    807  Ca1789      
1998 05  20.39267  20 27 30.26   -19 33 33.8   23.8R 98KS65    807  Ca1789      
1998 05  20.39954  20 27 30.25   -19 33 33.9   23.5R 98KS65    807  Ca1789      
1998 05  20.40648  20 27 30.24   -19 33 33.9   23.7R 98KS65    807  Ca1789      
1998 05  20.41336  20 27 30.23   -19 33 33.9   23.9R 98KS65    807  Ca1789      
1998 05  20.42023  20 27 30.22   -19 33 33.9   23.8R 98KS65    807  Ca1789      
1998 05  20.42710  20 27 30.21   -19 33 34.0   23.9R 98KS65    807  Ca1789      
1998 05  20.43397  20 27 30.20   -19 33 34.0   23.6R 98KS65    807  Ca1789      
1998 05  29.33008  20 27 14.04   -19 34 37.5   23.5R 98KS65    807  Ca1789      
1998 05  29.33695  20 27 14.02   -19 34 37.6   23.8R 98KS65    807  Ca1789      
1998 05  29.34383  20 27 14.00   -19 34 37.6   23.5R 98KS65    807  Ca1789      
1998 05  29.35070  20 27 13.98   -19 34 37.6   23.4R 98KS65    807  Ca1789      
1998 05  29.35758  20 27 13.97   -19 34 37.7   23.5R 98KS65    807  Ca1789      
1998 05  29.36446  20 27 13.96   -19 34 37.7   23.7R 98KS65    807  Ca1789      
1998 05  29.37133  20 27 13.95   -19 34 37.9   23.5R 98KS65    807  Ca1789      
1998 05  29.37821  20 27 13.93   -19 34 37.9   23.5R 98KS65    807  Ca1789      
1998 05  29.38509  20 27 13.90   -19 34 37.9   23.6R 98KS65    807  Ca1789      
1998 05  29.39196  20 27 13.88   -19 34 38.0   23.5R 98KS65    807  Ca1789      
1998 05  29.39884  20 27 13.87   -19 34 38.0   23.6R 98KS65    807  Ca1789      
1998 05  29.40571  20 27 13.86   -19 34 38.1   23.6R 98KS65    807  Ca1789      
1998 05  29.41260  20 27 13.84   -19 34 38.2   23.5R 98KS65    807  Ca1789      
1998 05  30.31129  20 27 11.83   -19 34 45.9   23.9R 98KS65    807  Ca1789      
1998 05  30.31817  20 27 11.82   -19 34 45.9   23.7R 98KS65    807  Ca1789      
1998 05  30.33192  20 27 11.79   -19 34 46.0   23.7R 98KS65    807  Ca1789      
1998 05  30.33879  20 27 11.77   -19 34 46.1   23.5R 98KS65    807  Ca1789      
1998 05  30.34567  20 27 11.74   -19 34 46.2   23.8R 98KS65    807  Ca1789      
1998 05  30.35270  20 27 11.73   -19 34 46.3   23.9R 98KS65    807  Ca1789      
1998 05  30.35957  20 27 11.72   -19 34 46.2   23.8R 98KS65    807  Ca1789      
1998 05  30.36645  20 27 11.70   -19 34 46.4   23.6R 98KS65    807  Ca1789      
1998 05  30.37332  20 27 11.69   -19 34 46.3   23.6R 98KS65    807  Ca1789      
1998 05  30.38035  20 27 11.68   -19 34 46.4   23.9R 98KS65    807  Ca1789      
1998 05  30.38722  20 27 11.66   -19 34 46.6   23.7R 98KS65    807  Ca1789      
1998 05  30.39410  20 27 11.64   -19 34 46.6   23.3R 98KS65    807  Ca1789      
1998 08  14.39513  20 21 53.16   -19 53 26.3   23.4R 98KS65    568  Ca1947      
1998 08  14.45299  20 21 52.89   -19 53 27.6         98KS65    568  Ca1947      
1998 08  14.48078  20 21 52.76   -19 53 27.8         98KS65    568  Ca1947      
1999 07  10.47682  20 30 21.58   -19 25 44.5         98KS65    568  Ca5541      
1999 07  10.52907  20 30 21.35   -19 25 45.3         98KS65    568  Ca5541      
1999 07  11.53090  20 30 16.71   -19 26 02.1         98KS65    568  Ca5541      
2000 08  07.07784  20 33 43.41   -19 15 27.6   23.9R 98KS65    809  Cb8997      
2000 08  07.11447  20 33 43.22   -19 15 28.4   23.5R 98KS65    809  Cb8997      
2000 08  07.13945  20 33 43.11   -19 15 28.9   23.7R 98KS65    809  Cb8997      
2000 08  27.06080  20 32 12.87   -19 20 53.8   23.5R 98KS65    807  Ch1065      
2001 05  21.53701  20 44 05.38   -18 37 36.2         98KS65    568  Cd2199      
2001 05  21.58770  20 44 05.32   -18 37 36.5         98KS65    568  Cd2199      
2013 10  07.15068  21 40 47.839  -14 43 53.07  24.0R 98KS65    695              

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    -0.07       0.00     0.10
  2   0.0000     -0.16    -0.08      -0.06     0.04
  3   0.0000     -0.19     0.05      -0.16    -0.05
  4   0.0001     -0.48    -0.10      -0.19    -0.08
  5   0.0001     -0.62    -0.09      -0.16    -0.04
  6   0.0001     -0.73    -0.03      -0.03     0.09
  7   0.0001     -0.90    -0.04      -0.09     0.04
  8   0.0001     -0.90     0.11      -0.09     0.04
  9   0.0002     -1.06     0.10      -0.15    -0.02
 10   0.0002     -1.31     0.00       0.01     0.15
 11   0.0002     -1.49    -0.03      -0.15    -0.01
 12   0.0002     -1.65    -0.04      -0.21    -0.07
 13   0.0002     -1.79    -0.02      -0.18    -0.03
 14   0.0002     -1.93    -0.01      -0.14     0.01
 15   0.0003     -2.06     0.01      -0.11     0.04
 16   0.0003     -2.23    -0.00      -0.17    -0.02
 17   0.0003     -2.36     0.01      -0.14     0.02
 18   0.0247   -239.32     0.11      -7.33    -0.06
 19   0.0247   -239.62     0.05      -7.36    -0.09
 20   0.0247   -239.89     0.00      -7.29    -0.02
 21   0.0247   -240.16    -0.04      -7.23     0.06
 22   0.0247   -240.33     0.02      -7.29    -0.00
 23   0.0248   -240.46     0.12      -7.26     0.03
 24   0.0248   -240.65     0.16      -7.42    -0.12
 25   0.0248   -240.92     0.12      -7.35    -0.05
 26   0.0248   -241.33    -0.07      -7.25     0.05
 27   0.0248   -241.63    -0.14      -7.28     0.02
 28   0.0248   -241.77    -0.04      -7.24     0.06
 29   0.0249   -241.93     0.03      -7.31    -0.00
 30   0.0249   -242.23    -0.04      -7.34    -0.03
 31   0.0273   -271.65    -0.04      -8.05    -0.02
 32   0.0274   -271.79     0.06      -8.01     0.02
 33   0.0274   -272.23     0.10      -8.01     0.03
 34   0.0274   -272.52     0.04      -8.04     0.01
 35   0.0274   -272.96    -0.16      -8.03     0.01
 36   0.0275   -273.12    -0.08      -8.10    -0.05
 37   0.0275   -273.23     0.05      -7.97     0.09
 38   0.0275   -273.56    -0.04      -8.09    -0.04
 39   0.0275   -273.67     0.09      -7.96     0.10
 40   0.0275   -273.83     0.17      -8.03     0.04
 41   0.0276   -274.15     0.09      -8.15    -0.09
 42   0.0276   -274.43     0.05      -8.09    -0.02
 43   0.2357  -4909.13    -0.06     -42.23     0.22
 44   0.2358  -4913.13    -0.14     -42.61    -0.18
 45   0.2359  -4914.97    -0.09     -42.38     0.04
 46   1.1394   2462.84    -0.21    -127.81    -0.02
 47   1.1395   2459.49     0.02    -127.80     0.00
 48   1.1423   2391.73    -0.12    -128.17     0.07
 49   2.2170   5384.57     0.24    -229.92     0.07
 50   2.2171   5381.76     0.04    -230.03    -0.04
 51   2.2172   5380.13     0.19    -230.13    -0.14
 52   2.2717   4061.26     0.00    -230.22    -0.11
 53   3.0040  14518.96    -0.14    -280.31    -0.03
 54   3.0041  14518.05    -0.10    -280.38    -0.06
 55  15.3835  67597.94     0.01   -1473.49     0.05

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.

98KS65    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.823    43.833    43.813
ecceobj         0.035     0.035     0.035
incobj          1.183     1.183     1.183
qmin           41.620    41.648    41.657
qmax           46.195    46.238    46.140
amean          43.830    43.839    43.820
amin           43.493    43.503    43.481
amax           44.179    44.186    44.168
emean           0.030     0.030     0.030
emin            0.014     0.014     0.013
emax            0.046     0.046     0.045
imean           0.912     0.910     0.914
imin            0.125     0.125     0.124
imax            1.449     1.446     1.453
excite_mean     0.035     0.035     0.035
fracstop        1.000     1.000     1.000
cjmean          3.098     3.098     3.098

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       179.1     179.0     179.6
kozaiamp        179.9     180.0     179.9