Orbit Fit and Astrometric record for 04MS8

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: 04MS8     
# Created Sat Dec 16 02:37:22 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   18
# Arc:   9.28y
# First observation: 2004/06/24
#  Last observation: 2013/10/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000129   0.049482  -0.000163   0.010641   0.040075   0.000000
# Chi-squared of fit:    11.43 DOF:   28 RMS:  0.14
# Min/Max residuals:    -0.38    0.24
# Exact a, adot, b, bdot, g, gdot:
  2.123790E-05  4.940709E-02  4.498763E-06  1.071516E-02  3.732096E-02  2.605229E-03
# Covariance matrix:
  1.7379E-13 -1.2252E-13  1.2916E-14 -2.2787E-14 -6.4040E-14 -2.2513E-13
 -1.2252E-13  2.8871E-13 -3.0886E-14  5.4707E-14  3.6212E-13  5.2215E-13
  1.2916E-14 -3.0886E-14  1.2717E-13 -2.5530E-14 -3.1535E-14 -6.1744E-14
 -2.2787E-14  5.4707E-14 -2.5530E-14  2.1430E-14  5.6387E-14  1.0913E-13
 -6.4040E-14  3.6212E-13 -3.1535E-14  5.6387E-14  8.8741E-13  4.9294E-13
 -2.2513E-13  5.2215E-13 -6.1744E-14  1.0913E-13  4.9294E-13  1.0617E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.812176  -74.852159    0.207238   -0.014086   -0.996984  2453180.936473
# Heliocentric elements and errors
Epoch:              2453180.5000  =  2004/06/24
Mean Anomaly:            6.01279 +/-     0.003
Argument of Peri:      344.76011 +/-     0.006
Long of Asc Node:      288.31766 +/-     0.000
Inclination:            12.26567 +/-     0.000
Eccentricity:         0.29589948 +/-    0.0001
Semi-Major Axis:     39.28584056 +/-    0.0053
Time of Perihelion: 2451678.3051 +/-       0.7
Perihelion:          27.66118084 +/-    0.0048
Aphelion:            50.91050028 +/-    0.0075
Period (y)              246.2421 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            7.05806388 +/-    0.0002
Ecliptic Y          -26.87580856 +/-    0.0007
Ecliptic Z           -0.37964658 +/-    0.0000
Ecliptic XDOT         0.00354903 +/-    0.0000
Ecliptic YDOT         0.00074492 +/-    0.0000
Ecliptic ZDOT         0.00078339 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   27.78973701 +/-    0.0006
Geocenter to KBO     26.79459701 +/-    0.0007
# Hcoef:  8.48

The following table shows the complete astrometric record for 04MS8. 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 (04MS8) followed by the observatory code and reference code for the source of the astrometry.

2004 06  24.43573  19 06 09.38   -23 23 09.4         04MS8     568  C~0Uqy      
2004 06  24.46335  19 06 09.18   -23 23 09.5         04MS8     568  C~0Uqy      
2004 06  25.45812  19 06 01.98   -23 23 15.1   23.4g 04MS8     568  C~0Uqy      
2004 06  25.45953  19 06 01.95   -23 23 15.1   23.1g 04MS8     568  C~0Uqy      
2004 06  25.48101  19 06 01.81   -23 23 15.4   22.7g 04MS8     568  C~0Uqy      
2004 06  25.48243  19 06 01.80   -23 23 15.3   22.9g 04MS8     568  C~0Uqy      
2004 06  25.49954  19 06 01.66   -23 23 15.4   22.9g 04MS8     568  C~0Uqy      
2004 06  25.50096  19 06 01.65   -23 23 15.2   22.8g 04MS8     568  C~0Uqy      
2005 06  11.46244  19 19 27.69   -22 24 22.2         04MS8     568  C~0Uqy      
2005 06  12.51301  19 19 21.02   -22 24 28.4         04MS8     568  C~0Uqy      
2005 06  12.55269  19 19 20.77   -22 24 28.7         04MS8     568  C~0Uqy      
2006 07  03.43985  19 28 35.70   -21 26 55.5   22.6r 04MS8     568  C~0Uqy      
2006 07  04.43937  19 28 28.52   -21 27 04.6   23.0r 04MS8     568  C~0Uqy      
2006 10  22.10888  19 21 59.64   -21 30 45.0         04MS8     675  C~0Uqy      
2006 10  23.11314  19 22 03.22   -21 30 34.0         04MS8     675  C~0Uqy      
2006 10  24.10993  19 22 06.87   -21 30 21.9         04MS8     675  C~0Uqy      
2013 10  05.10812  20 34 45.07   -14 02 50.8   22.4R 04MS8     695  C~0zdZ      
2013 10  06.09907  20 34 43.47   -14 03 00.9         04MS8     695  C~0zdZ      

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    -0.06       0.00     0.01
  2   0.0001     -2.75    -0.01       0.21     0.06
  3   0.0028   -101.87     0.08       5.86     0.06
  4   0.0028   -102.28    -0.18       5.91     0.10
  5   0.0029   -104.23     0.06       5.83    -0.11
  6   0.0029   -104.36     0.08       5.94     0.00
  7   0.0029   -106.28    -0.11       6.06     0.02
  8   0.0029   -106.40    -0.08       6.28     0.22
  9   0.9638  11396.17 (   0.84)   2127.99 (  -0.38)
 10   0.9667  11303.40     0.14    2134.37    -0.10
 11   0.9668  11299.92     0.23    2134.55    -0.18
 12   2.0233  19484.61    -0.05    4460.73     0.04
 13   2.0260  19383.23    -0.18    4466.71    -0.06
 14   2.3263  13944.07    -0.18    5031.58     0.18
 15   2.3290  13995.33     0.24    5035.56    -0.38
 16   2.3318  14047.72     0.05    5040.48     0.05
 17   9.2804  84773.57    -0.23   20507.68     0.17
 18   9.2831  84744.12     0.22   20502.46    -0.10

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.

04MS8    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.231    39.246    39.215
ecceobj         0.295     0.295     0.294
incobj         12.261    12.261    12.261
qmin           26.897    27.088    26.961
qmax           52.827    52.684    52.735
amean          39.455    39.455    39.455
amin           38.874    38.915    38.904
amax           40.125    40.105    40.133
emean           0.302     0.298     0.300
emin            0.288     0.283     0.284
emax            0.318     0.314     0.317
imean          13.740    13.833    13.784
imin           13.202    13.259    13.235
imax           14.229    14.401    14.518
excite_mean     0.384     0.382     0.383
fracstop        1.000     1.000     1.000
cjmean          2.883     2.885     2.883

libcent 0       179.2     179.3     178.8
libamp  0       127.4     126.2     125.7
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       172.9     176.5     178.6
kozaiamp        180.0     180.0     180.0