Orbit Fit and Astrometric record for 99HH12

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: 99HH12    
# Created Fri Nov 16 02:07:31 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   25 observations of   25
# Arc:  16.09y
# First observation: 1999/04/18
#  Last observation: 2015/05/22
# Chi-squared of fit:    70.50 DOF:   44 RMS:  0.30
# Min/Max residuals:    -0.88    0.62
# Exact a, adot, b, bdot, g, gdot:
  1.316149E-05  2.183753E-02  4.977238E-07  3.151844E-04  2.321234E-02 -3.676622E-04
# Covariance matrix:
  2.3167E-13 -4.2836E-14 -2.4432E-16 -4.6056E-16  1.4743E-13 -8.9836E-14
 -4.2836E-14  3.2256E-14 -6.5312E-16  4.6541E-16  1.3477E-14  8.3730E-14
 -2.4432E-16 -6.5312E-16  1.1552E-13 -8.4841E-15 -2.2937E-15 -1.7975E-15
 -4.6056E-16  4.6541E-16 -8.4841E-15  1.2262E-15  3.1582E-16  1.2576E-15
  1.4743E-13  1.3477E-14 -2.2937E-15  3.1582E-16  3.4318E-13  4.2314E-14
 -8.9836E-14  8.3730E-14 -1.7975E-15  1.2576E-15  4.2314E-14  2.2599E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.027267 -154.741015   -0.040733   -0.018362   -1.010557  2451286.711463
# Heliocentric elements and errors
Epoch:              2451286.5000  =  1999/04/18
Mean Anomaly:          223.34572 +/-     0.128
Argument of Peri:       88.14938 +/-     0.121
Long of Asc Node:      255.69259 +/-     0.003
Inclination:             1.30318 +/-     0.000
Eccentricity:         0.02442765 +/-    0.0001
Semi-Major Axis:     43.30238908 +/-    0.0042
Time of Perihelion: 2490794.6725 +/-      38.2
Perihelion:          42.24461335 +/-    0.0048
Aphelion:            44.36016481 +/-    0.0049
Period (y)              284.9548 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -39.84358679 +/-    0.0010
Ecliptic Y          -18.84794399 +/-    0.0005
Ecliptic Z           -0.77231626 +/-    0.0000
Ecliptic XDOT         0.00113523 +/-    0.0000
Ecliptic YDOT        -0.00230245 +/-    0.0000
Ecliptic ZDOT         0.00003797 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.08348669 +/-    0.0009
Geocenter to KBO     43.08057891 +/-    0.0011
# Hcoef:  6.98

The following table shows the complete astrometric record for 99HH12. 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 (99HH12) followed by the observatory code and reference code for the source of the astrometry.

1999 04  18.21072  13 32 06.14   -10 43 43.0   23.9R 99HH12    695  Ca5574      
1999 04  18.28462  13 32 05.73   -10 43 40.3         99HH12    695  Ca5574      
1999 04  18.39041  13 32 05.35   -10 43 37.8         99HH12    695  Ca5574      
1999 06  05.89245  13 29 06.30   -10 25 35.1   22.8R 99HH12    950  Ca5574      
1999 06  05.95103  13 29 06.18   -10 25 34.3         99HH12    950  Ca5574      
1999 06  06.01039  13 29 06.00   -10 25 32.8         99HH12    950  Ca5574      
2000 06  27.97421  13 33 09.45   -10 47 25.7         99HH12    950  Cb6477      
2000 06  28.01067  13 33 09.41   -10 47 25.4         99HH12    950  Cb6477      
2000 06  28.93437  13 33 08.68   -10 47 19.7         99HH12    950  Cb6477      
2000 06  28.96820  13 33 08.65   -10 47 19.2         99HH12    950  Cb6477      
2000 06  28.99353  13 33 08.63   -10 47 19.3         99HH12    950  Cb6477      
2002 04  07.17182  13 47 14.21   -12 06 08.3   22.6R 99HH12    807  Cf4290      
2002 04  07.23610  13 47 13.94   -12 06 07.4         99HH12    807  Cf4290      
2002 04  08.20735  13 47 09.72   -12 05 42.9         99HH12    807  Cf4290      
2006 05  25.224014 14 03 15.38   -13 27 44.0         99HH12    645  C~1eMn      
2006 05  25.224843 14 03 15.38   -13 27 44.0         99HH12    645  C~1eMn      
2006 05  25.227331 14 03 15.37   -13 27 43.9         99HH12    645  C~1eMn      
2014 05  30.22785  14 42 36.81   -16 30 30.5   22.5R 99HH12    695  C~1LJ1      
2014 05  30.35300  14 42 36.29   -16 30 27.8         99HH12    695  C~1LJ1      
2015 04  13.18074  14 51 12.76   -17 07 33.2   23.6V 99HH12    W84  C~2J8l      
2015 04  13.33132  14 51 12.11   -17 07 30.5         99HH12    W84  C~2J8l      
2015 04  13.38114  14 51 11.90   -17 07 29.5         99HH12    W84  C~2J8l      
2015 05  22.19088  14 48 16.30   -16 54 29.1   23.3R 99HH12    695  C~1hTP      
2015 05  22.22878  14 48 16.13   -16 54 28.1         99HH12    695  C~1hTP      
2015 05  22.28051  14 48 15.90   -16 54 27.3         99HH12    695  C~1hTP      

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     0.31       0.00    -0.18
  2   0.0002      0.00    -0.88       0.00     0.62
  3   0.0005      0.00     0.51       0.00     0.39
  4   0.1333      0.00     0.01       0.00    -0.02
  5   0.1334      0.00     0.44       0.00    -0.14
  6   0.1336      0.00    -0.00       0.00     0.42
  7   1.1958      0.00    -0.01       0.00    -0.10
  8   1.1959      0.00    -0.12       0.00    -0.04
  9   1.1984      0.00     0.02       0.00    -0.10
 10   1.1985      0.00    -0.01       0.00     0.19
 11   1.1986      0.00     0.00       0.00    -0.07
 12   2.9705      0.00     0.05       0.00    -0.03
 13   2.9706      0.00     0.24       0.00    -0.67
 14   2.9733      0.00     0.13       0.00     0.47
 15   7.1020      0.00    -0.34       0.00    -0.52
 16   7.1020      0.00    -0.29       0.00    -0.53
 17   7.1020      0.00    -0.30       0.00    -0.48
 18  15.1157      0.00     0.23       0.00     0.11
 19  15.1161      0.00     0.21       0.00     0.39
 20  15.9862      0.00    -0.02       0.00     0.02
 21  15.9866      0.00    -0.08       0.00    -0.04
 22  15.9868      0.00    -0.03       0.00     0.04
 23  16.0930      0.00    -0.01       0.00     0.00
 24  16.0931      0.00    -0.01       0.00     0.24
 25  16.0933      0.00     0.02       0.00     0.01

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.

99HH12    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.299    43.299    43.299
ecceobj         0.024     0.024     0.024
incobj          1.305     1.305     1.305
qmin           41.832    41.831    41.833
qmax           45.553    45.552    45.554
amean          43.613    43.613    43.613
amin           43.276    43.275    43.275
amax           43.944    43.944    43.944
emean           0.022     0.022     0.022
emin            0.004     0.004     0.004
emax            0.037     0.037     0.037
imean           3.110     3.110     3.110
imin            2.397     2.397     2.397
imax            3.775     3.775     3.775
excite_mean     0.059     0.059     0.059
fracstop        1.000     1.000     1.000
cjmean          3.093     3.093     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       183.4     183.2     183.4
kozaiamp        179.9     180.0     180.0