Orbit Fit and Astrometric record for 99HD12

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: 99HD12    
# Created Sat Dec 16 02:37:01 2017
# Orbit generated from Bernstein formalism
# Fitting   11 observations of   11
# Arc:  49.83d
# First observation: 1999/04/17
#  Last observation: 1999/06/05
Preliminary a, adot, b, bdot, g, gdot:
  -0.000000   0.187173   0.000003   0.025681   0.088437   0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit:    41.42 DOF:   17 RMS:  0.34
# Min/Max residuals:    -0.56    0.88
# Exact a, adot, b, bdot, g, gdot:
  2.984153E-05  1.481753E-01  5.512145E-06  2.536483E-02  8.222685E-02  6.619362E-02
# Covariance matrix:
  4.5950E-13  7.7620E-10  3.6999E-14  2.6376E-12  1.1491E-10 -9.8428E-09
  7.7620E-10  8.2097E-06  4.4131E-10  2.0684E-08  1.1941E-06 -1.0633E-04
  3.6999E-14  4.4131E-10  3.1959E-13 -1.4767E-12  6.4101E-11 -5.7288E-09
  2.6376E-12  2.0684E-08 -1.4767E-12  9.8990E-11  3.0209E-09 -2.6607E-07
  1.1491E-10  1.1941E-06  6.4101E-11  3.0209E-09  1.7372E-07 -1.5461E-05
 -9.8428E-09 -1.0633E-04 -5.7288E-09 -2.6607E-07 -1.5461E-05  1.3778E-03
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.198043 -172.257145   -0.325863    0.036482   -0.956664  2451285.655353
# Heliocentric elements and errors
Epoch:              2451280.5000  =  1999/04/12
Mean Anomaly:           28.23080 +/-    14.294
Argument of Peri:      290.93412 +/-     9.191
Long of Asc Node:      177.60454 +/-     0.324
Inclination:            10.06694 +/-     0.282
Eccentricity:         0.51581603 +/-    0.2553
Semi-Major Axis:     19.34047042 +/-    6.3528
Time of Perihelion: 2448844.2626 +/-     284.2
Perihelion:           9.36434579 +/-    5.8177
Aphelion:            29.31659505 +/-   10.8220
Period (y)               85.0567 +/-     41.91
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -12.93825574 +/-    0.0610
Ecliptic Y           -2.08885948 +/-    0.0083
Ecliptic Z            0.46651976 +/-    0.0024
Ecliptic XDOT        -0.00148795 +/-    0.0012
Ecliptic YDOT        -0.00517230 +/-    0.0001
Ecliptic ZDOT         0.00092849 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   13.11409304 +/-    0.0602
Geocenter to KBO     12.16147808 +/-    0.0616
# Hcoef: 12.85

The following table shows the complete astrometric record for 99HD12. 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 (99HD12) followed by the observatory code and reference code for the source of the astrometry.

1999 04  17.15461  12 31 54.80   -01 03 07.9   22.9R 99HD12    695  Ca4930      
1999 04  17.21911  12 31 54.08   -01 03 01.5         99HD12    695  Ca4930      
1999 04  17.29920  12 31 53.13   -01 02 56.0         99HD12    695  Ca4930      
1999 04  18.18971  12 31 42.91   -01 01 39.8         99HD12    695  Ca4930      
1999 05  05.86823  12 28 43.71   -00 39 31.4         99HD12    950  Ca4930      
1999 05  05.92947  12 28 43.16   -00 39 28.4         99HD12    950  Ca4930      
1999 05  05.99064  12 28 42.59   -00 39 24.4         99HD12    950  Ca4930      
1999 06  05.87928  12 26 05.81   -00 19 37.8         99HD12    950  Ca5574      
1999 06  05.92370  12 26 05.75   -00 19 37.3   24.2R 99HD12    950  Ca5574      
1999 06  05.97064  12 26 05.72   -00 19 37.1         99HD12    950  Ca5574      
1999 06  05.98770  12 26 05.65   -00 19 36.6   24.5R 99HD12    950  Ca5574      

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    -0.28       0.00    -0.13
  2   0.0002    -12.45    -0.08       1.62     0.88
  3   0.0004    -27.71     0.38       1.06    -0.43
  4   0.0028   -198.61    -0.03      10.67    -0.56
  5   0.0512  -3192.61    -0.02     171.61     0.71
  6   0.0514  -3201.38     0.23     171.11    -0.15
  7   0.0516  -3210.81    -0.19     171.42    -0.20
  8   0.1361  -5841.11    -0.18     334.27     0.01
  9   0.1363  -5842.13    -0.11     334.37     0.02
 10   0.1364  -5842.63     0.52     334.38    -0.08
 11   0.1364  -5843.79    -0.24     334.42    -0.08

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.

99HD12    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0