Orbit Fit and Astrometric record for 98HH151

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: 98HH151   
# Created Sat Oct 21 01:36:57 2017
# Orbit generated from Bernstein formalism
# Fitting   31 observations of   34
# Arc:  15.04y
# First observation: 1998/04/28
#  Last observation: 2013/05/14
Preliminary a, adot, b, bdot, g, gdot:
  -0.008263   0.042223  -0.001162   0.006540   0.040203   0.000000
# Chi-squared of fit:    53.21 DOF:   56 RMS:  0.23
# Min/Max residuals:    -0.96    0.48
# Exact a, adot, b, bdot, g, gdot:
  1.848861E-05  3.643490E-02  1.443217E-06  5.637363E-03  3.132206E-02 -3.925287E-03
# Covariance matrix:
  1.0519E-13 -2.8220E-14  3.7859E-15 -3.3457E-15 -3.4890E-14 -3.4334E-14
 -2.8220E-14  1.8802E-14 -3.0712E-15  2.7067E-15  2.0174E-14  2.7811E-14
  3.7859E-15 -3.0712E-15  7.8541E-14 -7.1027E-15 -3.6644E-15 -4.8675E-15
 -3.3457E-15  2.7067E-15 -7.1027E-15  1.6662E-15  3.3749E-15  4.2916E-15
 -3.4890E-14  2.0174E-14 -3.6644E-15  3.3749E-15  1.8515E-13  3.3995E-14
 -3.4334E-14  2.7811E-14 -4.8675E-15  4.2916E-15  3.3995E-14  4.4087E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.079241 -166.408457   -0.409059   -0.001500   -0.925441  2450931.801491
# Heliocentric elements and errors
Epoch:              2450930.5000  =  1998/04/27
Mean Anomaly:          335.08792 +/-     0.005
Argument of Peri:       35.66122 +/-     0.007
Long of Asc Node:      194.81035 +/-     0.000
Inclination:             8.80585 +/-     0.000
Eccentricity:         0.18586196 +/-    0.0000
Semi-Major Axis:     39.12743435 +/-    0.0026
Time of Perihelion: 2457116.7574 +/-       1.1
Perihelion:          31.85513288 +/-    0.0027
Aphelion:            46.39973582 +/-    0.0035
Period (y)              244.7543 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -31.82728230 +/-    0.0004
Ecliptic Y           -8.12083760 +/-    0.0001
Ecliptic Z           -0.04409804 +/-    0.0000
Ecliptic XDOT         0.00108320 +/-    0.0000
Ecliptic YDOT        -0.00300638 +/-    0.0000
Ecliptic ZDOT         0.00049315 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.84700666 +/-    0.0004
Geocenter to KBO     31.92637793 +/-    0.0004
# Hcoef:  8.35

The following table shows the complete astrometric record for 98HH151. 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 (98HH151) followed by the observatory code and reference code for the source of the astrometry.

1998 04  28.30076  12 49 54.21   -05 26 12.1   23.4R 98HH151   568  Ca4478      
1998 04  28.36758  12 49 53.88   -05 26 10.1   23.4R 98HH151   568  Ca4478      
1998 04  28.44050  12 49 53.52   -05 26 07.6   23.4R 98HH151   568  Ca4478      
1998 05  01.34968  12 49 39.48   -05 24 29.1   23.4R 98HH151   568  Ca4478      
1998 05  01.36130  12 49 39.44   -05 24 28.8   23.4R 98HH151   568  Ca4478      
1998 05  01.37333  12 49 39.38   -05 24 28.2   23.4R 98HH151   568  Ca4478      
1998 05  22.32191  12 48 14.83   -05 14 22.1   23.4R 98HH151   568  Ca4478      
1998 05  22.33353  12 48 14.80   -05 14 21.5   23.4R 98HH151   568  Ca4478      
1998 05  22.34517  12 48 14.75   -05 14 21.1   23.4R 98HH151   568  Ca4478      
1998 06  30.30472  12 47 24.42   -05 06 48.6   23.4R 98HH151   568  Ca4478      
1999 01  22.53850  13 04 41.22   -06 42 58.5   23.0R 98HH151   568  Ca5540      
1999 01  24.60212  13 04 40.24   -06 42 44.5         98HH151   568  Ca5540      
1999 03  10.58587  13 02 29.92   -06 26 34.1   23.4R 98HH151   568  Ca4825      
1999 03  10.60646  13 02 29.79   -06 26 33.2   23.4R 98HH151   568  Ca4825      
1999 04  08.49389  12 59 56.72   -06 09 01.4   22.8R 98HH151   568  Ca4825      
1999 04  08.52123  12 59 56.55   -06 09 00.1   22.8R 98HH151   568  Ca4825      
1999 05  05.91788  12 57 33.75   -05 52 39.6         98HH151   950  Ca4825      
1999 05  05.98698  12 57 33.43   -05 52 38.0         98HH151   950  Ca4825      
1999 05  06.03852  12 57 33.15   -05 52 35.9         98HH151   950  Ca4825      
2001 04  27.33472  13 14 56.67   -06 57 28.8   22.8R 98HH151   568  Cd0712      
2001 04  27.44260  13 14 56.09   -06 57 25.0         98HH151   568  Cd0712      
2001 05  19.29265  13 13 12.61   -06 45 59.8   22.9R 98HH151   568  Ce6434      
2001 05  20.29071  13 13 08.61   -06 45 33.3         98HH151   568  Ce6434      
2001 05  20.37596  13 13 08.27   -06 45 31.1         98HH151   568  Ce6434      
2006 05  26.214231 13 55 35.62   -09 06 41.1         98HH151   645  C~1S6l      
2006 05  26.215061 13 55 35.62   -09 06 41.1         98HH151   645  C~1S6l      
2006 05  26.217549 13 55 35.61   -09 06 41.1         98HH151   645  C~1S6l      
2007 04  22.24032  14 07 27.22   -09 51 14.7   21.8R 98HH151   807  C~0sOh      
2007 04  22.30373  14 07 26.85   -09 51 12.6         98HH151   807  C~0sOh      
2013 03  12.41695  15 04 12.64   -12 31 31.7   23.4R 98HH151   695  C~0ucn      
2013 03  12.49883  15 04 12.43   -12 31 29.8         98HH151   695  C~0ucn      
2013 03  13.45994  15 04 09.91   -12 31 08.8         98HH151   695  C~0ucn      
2013 05  14.33024  14 59 04.83   -12 02 26.1   23.1R 98HH151   G37  C~0snV      
2013 05  14.37672  14 59 04.55   -12 02 24.7         98HH151   G37  C~0snV      

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    -0.02       0.00     0.29
  2   0.0002     -5.32     0.16      -0.07     0.04
  3   0.0004    -11.24     0.23       0.15     0.07
  4   0.0083   -242.70    -0.10       9.47    -0.10
  5   0.0084   -243.36     0.16       9.52    -0.09
  6   0.0084   -244.42     0.06       9.72     0.09
  7   0.0658  -1643.53     0.06      77.25    -0.41
  8   0.0658  -1644.18     0.05      77.63    -0.06
  9   0.0658  -1645.02    -0.15      77.71    -0.02
 10   0.1725  -2513.81    -0.15     201.96    -0.50
 11   0.7371  14004.95     0.36     848.83     0.14
 12   0.7428  13986.03     0.35     856.20     0.48
 13   0.8659  11812.08    -0.46    1009.74    -0.20
 14   0.8660  11809.94    -0.96    1009.83    -0.18
 15   0.9451   9292.23     0.07    1105.18     0.13
 16   0.9452   9289.38    -0.24    1105.40     0.28
 17   1.0202   6942.22 (   2.41)   1190.43 (   0.94)
 18   1.0204   6937.19 (   2.75)   1190.07 (   0.41)
 19   1.0205   6932.52 (   2.09)   1190.40 (   0.62)
 20   2.9980  22888.43     0.21    3540.59     0.05
 21   2.9983  22878.89     0.23    3540.84     0.08
 22   3.0582  21173.71     0.03    3591.54     0.20
 23   3.0609  21107.83     0.09    3593.47     0.12
 24   3.0611  21102.26     0.21    3593.59     0.11
 25   8.0764  61073.90    -0.13    9871.46    -0.27
 26   8.0764  61073.90    -0.06    9871.46    -0.27
 27   8.0764  61073.75    -0.02    9871.40    -0.33
 28   8.9827  73038.24     0.01   11211.78     0.08
 29   8.9829  73031.65     0.06   11211.80     0.01
 30  14.8723 137003.35     0.18   20309.63    -0.09
 31  14.8725 136998.32     0.26   20310.58     0.10
 32  14.8752 136938.66    -0.30   20319.94     0.01
 33  15.0446 130139.32    -0.04   20498.11     0.05
 34  15.0447 130133.23    -0.11   20498.05     0.18

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.

98HH151    quality flag:3

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

axisobj        39.081    39.089    39.073
ecceobj         0.184     0.184     0.184
incobj          8.811     8.811     8.811
qmin           31.016    30.976    31.099
qmax           48.331    48.353    48.273
amean          39.456    39.455    39.456
amin           39.060    39.069    39.049
amax           39.907    39.898    39.915
emean           0.191     0.191     0.191
emin            0.169     0.167     0.168
emax            0.211     0.213     0.210
imean           9.405     9.406     9.407
imin            8.652     8.652     8.652
imax           10.272    10.263    10.244
excite_mean     0.252     0.252     0.252
fracstop        1.000     1.000     1.000
cjmean          2.980     2.980     2.980

libcent 0       180.4     181.0     181.1
libamp  0        62.9      59.0      67.5
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       189.0     188.9     189.2
kozaiamp        180.0     179.9     180.0