Orbit Fit and Astrometric record for 05JY185

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: 05JY185   
# Created Mon Dec 18 02:37:25 2017
# Orbit generated from Bernstein formalism
# Fitting   15 observations of   16
# Arc:   2.99y
# First observation: 2005/05/12
#  Last observation: 2008/05/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000001   0.021296  -0.000001  -0.000657   0.022560   0.000000
# Chi-squared of fit:     7.85 DOF:   24 RMS:  0.13
# Min/Max residuals:    -0.22    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.527131E-05  2.136690E-02 -7.491930E-07 -6.594768E-04  2.291579E-02  1.577609E-03
# Covariance matrix:
  3.7334E-13 -1.5616E-13  5.4645E-16 -5.4107E-16  9.9899E-13  1.1719E-13
 -1.5616E-13  3.0124E-12  3.7047E-14 -1.0590E-13  1.0646E-11  5.2474E-11
  5.4645E-16  3.7047E-14  2.6276E-13 -1.1303E-13  1.4596E-13  6.7118E-13
 -5.4107E-16 -1.0590E-13 -1.1303E-13  7.9873E-14 -4.0647E-13 -1.9101E-12
  9.9899E-13  1.0646E-11  1.4596E-13 -4.0647E-13  5.0792E-11  1.9983E-10
  1.1719E-13  5.2474E-11  6.7118E-13 -1.9101E-12  1.9983E-10  9.4523E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.219783 -113.907988    0.246677   -0.020711   -0.976320  2453502.955723
# Heliocentric elements and errors
Epoch:              2453500.5000  =  2005/05/10
Mean Anomaly:           92.51729 +/-     0.571
Argument of Peri:      113.43067 +/-     0.451
Long of Asc Node:       31.79060 +/-     0.012
Inclination:             2.13382 +/-     0.001
Eccentricity:         0.07076241 +/-    0.0015
Semi-Major Axis:     44.25993972 +/-    0.0398
Time of Perihelion: 2425860.6891 +/-     166.5
Perihelion:          41.12799954 +/-    0.0745
Aphelion:            47.39187990 +/-    0.0774
Period (y)              294.4587 +/-      0.40
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -18.30609339 +/-    0.0055
Ecliptic Y          -40.67843564 +/-    0.0124
Ecliptic Z           -0.92894857 +/-    0.0003
Ecliptic XDOT         0.00225875 +/-    0.0000
Ecliptic YDOT        -0.00121237 +/-    0.0000
Ecliptic ZDOT        -0.00008273 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.61738592 +/-    0.0115
Geocenter to KBO     43.63804105 +/-    0.0136
# Hcoef:  6.96

The following table shows the complete astrometric record for 05JY185. 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 (05JY185) followed by the observatory code and reference code for the source of the astrometry.

2005 05  12.45498  16 15 55.86   -22 31 32.0   23.8g 05JY185   568  C74770      
2005 05  12.48126  16 15 55.74   -22 31 31.7   23.9g 05JY185   568  C74770      
2005 05  12.51256  16 15 55.59   -22 31 31.5   23.8g 05JY185   568  C74770      
2005 05  13.53618  16 15 50.81   -22 31 20.5   23.9g 05JY185   568  C74770      
2006 05  25.39509  16 20 07.48   -22 44 02.9   23.2r 05JY185   568  C~0VE1      
2006 05  25.43196  16 20 07.30   -22 44 02.5   23.0r 05JY185   568  C~0VE1      
2006 05  25.48307  16 20 07.05   -22 44 01.9   22.7r 05JY185   568  C~0VE1      
2006 05  26.46461  16 20 02.30   -22 43 51.3         05JY185   568  C~0VE1      
2007 05  15.36569  16 26 09.34   -22 59 57.9         05JY185   675  C~0VE1      
2007 05  15.42089  16 26 09.08   -22 59 57.4         05JY185   675  C~0VE1      
2007 05  16.32251  16 26 04.82   -22 59 48.7         05JY185   675  C~0VE1      
2008 05  03.39351  16 32 12.22   -23 14 55.8         05JY185   695  C~0VE1      
2008 05  03.43565  16 32 12.04   -23 14 55.3         05JY185   695  C~0VE1      
2008 05  07.49087  16 31 54.45   -23 14 23.5   23.0r 05JY185   568  C~0VE1      
2008 05  07.51401  16 31 54.37   -23 14 23.6   23.1r 05JY185   568  C~0VE1      
2008 05  07.53734  16 31 54.24   -23 14 23.3   23.0r 05JY185   568  C~0VE1      

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    -0.11       0.00     0.06
  2   0.0001     -1.69    -0.04       0.01     0.09
  3   0.0002     -3.77    -0.03      -0.16    -0.04
  4   0.0030    -70.90     0.25      -0.89     0.05
  5   1.0347   3561.16    -0.13    -143.92    -0.02
  6   1.0348   3558.64    -0.10    -143.95    -0.02
  7   1.0350   3555.13    -0.08    -143.93     0.02
  8   1.0377   3488.55     0.13    -144.50    -0.12
  9   2.0066   8655.91     0.16    -273.38    -0.05
 10   2.0068   8652.28     0.21    -273.45    -0.08
 11   2.0092   8592.71    -0.22    -274.13    -0.09
 12   2.9759  13755.39    -0.21    -398.37    -0.03
 13   2.9760  13752.85    -0.20    -398.24     0.15
 14   2.9871  13507.31     0.18    -402.54     0.12
 15   2.9872  13506.23 (   0.55)   -402.80 (  -0.11)
 16   2.9872  13504.41     0.20    -402.77    -0.06

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.

05JY185    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.821    43.941    43.703
ecceobj         0.069     0.065     0.072
incobj          2.144     2.144     2.144
qmin           40.013    40.299    39.652
qmax           48.457    48.412    48.576
amean          44.121    44.241    44.008
amin           43.770    43.890    43.654
amax           44.498    44.615    44.390
emean           0.074     0.070     0.078
emin            0.057     0.054     0.061
emax            0.090     0.085     0.095
imean           1.962     1.989     1.923
imin            1.144     1.213     1.073
imax            2.638     2.611     2.674
excite_mean     0.082     0.078     0.086
fracstop        1.000     1.000     1.000
cjmean          3.095     3.097     3.093

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       168.8     161.4     167.3
kozaiamp        180.0     179.9     180.0