Orbit Fit and Astrometric record for 98HR151

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: 98HR151   
# Created Wed Nov 27 02:07:53 2024
# Orbit generated from Bernstein formalism
# Fitting     11 observations of     11
# Arc:  62.99d
# First observation: 1998/04/28
#  Last observation: 1998/06/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000002   0.029564   0.000000   0.003050   0.026027   0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit:     9.46 DOF:     17 RMS:  0.16
# Min/Max residuals:    -0.34    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.559770E-05  2.698447E-02  1.571241E-06  3.109065E-03  2.562798E-02 -1.104982E-02
# Covariance matrix:
  3.0164E-13 -6.2823E-12 -4.0905E-15  3.4438E-13  6.9647E-13  6.6336E-10
 -6.2823E-12  3.3795E-08  1.0810E-11 -9.2098E-10  4.2950E-09 -1.7674E-06
 -4.0905E-15  1.0810E-11  2.2829E-13 -2.0766E-12  1.3313E-12 -5.8078E-10
  3.4438E-13 -9.2098E-10 -2.0766E-12  6.0796E-11 -1.1348E-10  4.9456E-08
  6.9647E-13  4.2950E-09  1.3313E-12 -1.1348E-10  5.6756E-10 -2.1774E-07
  6.6336E-10 -1.7674E-06 -5.8078E-10  4.9456E-08 -2.1774E-07  9.4922E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.037481 -166.198353   -0.405663   -0.000826   -0.926937  2450931.801491
# Heliocentric elements and errors
Epoch:              2450930.5000  =  1998/04/27
Mean Anomaly:          332.46391 +/-    21.327
Argument of Peri:       72.53679 +/-    12.302
Long of Asc Node:      194.70820 +/-     0.004
Inclination:             6.56251 +/-     0.079
Eccentricity:         0.47399899 +/-    0.3993
Semi-Major Axis:     58.71363436 +/-   29.6713
Time of Perihelion: 2463499.6695 +/-    1996.8
Perihelion:          30.88343089 +/-   28.1659
Aphelion:            86.54383783 +/-   49.6238
Period (y)              449.9007 +/-    341.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.68824941 +/-    0.0352
Ecliptic Y           -9.92683497 +/-    0.0087
Ecliptic Z           -0.02545382 +/-    0.0000
Ecliptic XDOT         0.00183583 +/-    0.0010
Ecliptic YDOT        -0.00250924 +/-    0.0002
Ecliptic ZDOT         0.00033283 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.94149900 +/-    0.0342
Geocenter to KBO     39.01985779 +/-    0.0363
# Hcoef:  8.58

The following table shows the complete astrometric record for 98HR151. 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 (98HR151) followed by the observatory code and reference code for the source of the astrometry.

1998 04  28.30076  12 50 44.80   -05 28 47.2   24.3R 98HR151   568  Ca4825      
1998 04  28.36758  12 50 44.49   -05 28 45.2   24.3R 98HR151   568  Ca4825      
1998 04  28.44050  12 50 44.18   -05 28 42.9   24.3R 98HR151   568  Ca4825      
1998 05  01.31256  12 50 32.51   -05 27 24.4   24.3R 98HR151   568  Ca4825      
1998 05  01.32418  12 50 32.45   -05 27 24.0   24.3R 98HR151   568  Ca4825      
1998 05  01.33580  12 50 32.40   -05 27 23.5   24.3R 98HR151   568  Ca4825      
1998 05  23.30442  12 49 17.43   -05 18 49.3   24.3R 98HR151   568  Ca4825      
1998 05  23.31606  12 49 17.40   -05 18 48.8   24.3R 98HR151   568  Ca4825      
1998 05  23.32769  12 49 17.35   -05 18 48.7   24.3R 98HR151   568  Ca4825      
1998 06  29.35264  12 48 32.56   -05 12 55.8   24.3R 98HR151   568  Ca4825      
1998 06  30.29242  12 48 32.98   -05 12 56.5   24.3R 98HR151   568  Ca4825      

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     0.22       0.00     0.07
     2   0.0002     -5.04    -0.21       0.05     0.04
     3   0.0004    -10.20    -0.34       0.37     0.26
     4   0.0082   -201.26     0.30       5.09    -0.19
     5   0.0083   -202.24     0.10       5.11    -0.18
     6   0.0083   -203.12    -0.01       5.28    -0.03
     7   0.0685  -1434.55     0.09      44.29    -0.10
     8   0.0685  -1435.16     0.02      44.57     0.17
     9   0.0685  -1435.89    -0.18      44.38    -0.04
    10   0.1699  -2189.53     0.12     109.44    -0.07
    11   0.1725  -2183.47    -0.10     111.23     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.

98HR151    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