Orbit Fit and Astrometric record for 97QH4

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: 97QH4     
# Created Thu Oct 19 01:36:57 2017
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   30
# Arc:  17.08y
# First observation: 1997/08/27
#  Last observation: 2014/09/27
Preliminary a, adot, b, bdot, g, gdot:
  -0.001843   0.025944  -0.000482   0.006076   0.025966   0.000000
# Chi-squared of fit:   129.08 DOF:   54 RMS:  0.37
# Min/Max residuals:    -0.85    0.88
# Exact a, adot, b, bdot, g, gdot:
  1.427814E-05  2.377789E-02  2.147860E-06  5.567504E-03  2.469510E-02 -1.689098E-03
# Covariance matrix:
  8.1686E-14 -2.5333E-14  3.9530E-15 -4.9706E-15  2.3661E-14 -4.8957E-14
 -2.5333E-14  3.2338E-14 -5.6024E-15  7.1446E-15  2.2576E-14  7.0552E-14
  3.9530E-15 -5.6024E-15  6.2312E-14 -6.7385E-15 -2.8873E-15 -1.3199E-14
 -4.9706E-15  7.1446E-15 -6.7385E-15  3.9196E-15  4.0584E-15  1.6811E-14
  2.3661E-14  2.2576E-14 -2.8873E-15  4.0584E-15  2.2283E-13  4.0751E-14
 -4.8957E-14  7.0552E-14 -1.3199E-14  1.6811E-14  4.0751E-14  1.6596E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.062123   -4.020474    0.369618   -0.001206   -0.930918  2450687.988791
# Heliocentric elements and errors
Epoch:              2450680.5000  =  1997/08/20
Mean Anomaly:          300.18035 +/-     0.029
Argument of Peri:       68.32874 +/-     0.035
Long of Asc Node:      355.72303 +/-     0.000
Inclination:            13.14602 +/-     0.000
Eccentricity:         0.08449822 +/-    0.0000
Semi-Major Axis:     43.01913935 +/-    0.0033
Time of Perihelion: 2467805.5693 +/-       8.1
Perihelion:          39.38409880 +/-    0.0033
Aphelion:            46.65417990 +/-    0.0038
Period (y)              282.1635 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           41.30440773 +/-    0.0008
Ecliptic Y           -3.27707005 +/-    0.0001
Ecliptic Z           -0.04380336 +/-    0.0000
Ecliptic XDOT         0.00000320 +/-    0.0000
Ecliptic YDOT         0.00265024 +/-    0.0000
Ecliptic ZDOT         0.00061731 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.43422745 +/-    0.0008
Geocenter to KBO     40.49385823 +/-    0.0008
# Hcoef:  7.10

The following table shows the complete astrometric record for 97QH4. 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 (97QH4) followed by the observatory code and reference code for the source of the astrometry.

1997 08  27.48806  23 45 20.40   -01 39 18.6   22.5R 97QH4     568  C30562      
1997 08  27.54196  23 45 20.12   -01 39 20.0         97QH4     568  C30562      
1997 08  27.57699  23 45 20.01   -01 39 21.2         97QH4     568  C30562      
1997 08  28.46564  23 45 16.22   -01 39 42.5         97QH4     568  C30562      
1997 08  28.52310  23 45 15.95   -01 39 43.9         97QH4     568  C30562      
1997 08  28.57356  23 45 15.73   -01 39 45.1         97QH4     568  C30562      
1997 09  01.37881  23 44 59.42   -01 41 18.6         97QH4     568  C30562      
1997 09  01.43322  23 44 59.15   -01 41 20.1         97QH4     568  C30562      
1997 09  01.48345  23 44 58.93   -01 41 21.2         97QH4     568  C30562      
1997 09  23.26736  23 43 19.95   -01 50 47.8         97QH4     568  Ca0017      
1997 09  23.29155  23 43 19.87   -01 50 48.8         97QH4     568  Ca0017      
1997 09  23.37704  23 43 19.46   -01 50 50.8         97QH4     568  Ca0017      
1997 09  24.29769  23 43 15.24   -01 51 15.0         97QH4     568  Ca0017      
1997 09  24.34213  23 43 15.00   -01 51 16.4         97QH4     568  Ca0017      
1997 10  05.17260  23 42 26.46   -01 55 54.4         97QH4     675  Ca0017      
1997 10  05.23823  23 42 26.16   -01 55 56.2   23.0R 97QH4     675  Ca0017      
1997 10  05.30509  23 42 25.86   -01 55 57.8         97QH4     675  Ca0017      
1998 06  29.53722  23 52 14.06   -00 37 18.8         97QH4     568  Ca1697      
1998 06  30.57255  23 52 13.86   -00 37 16.2         97QH4     568  Ca1697      
1998 07  01.51000  23 52 13.62   -00 37 14.2         97QH4     568  Ca1697      
2000 08  08.32651  00 00 05.27   +00 58 01.3   23.0R 97QH4     809  Cc2106      
2000 08  08.37515  00 00 05.10   +00 58 00.4   23.1R 97QH4     809  Cc2106      
2000 08  08.40854  00 00 05.00   +00 57 59.9   23.2R 97QH4     809  Cc2106      
2000 08  27.32153  23 58 56.23   +00 51 53.2   22.4R 97QH4     807  Cc0673      
2000 08  27.39603  23 58 55.93   +00 51 51.8         97QH4     807  Cc0673      
2001 11  18.196678 23 57 58.46   +01 10 44.2         97QH4     645  C~1cF1      
2001 11  18.197507 23 57 58.45   +01 10 44.2         97QH4     645  C~1cF1      
2001 11  18.199995 23 57 58.45   +01 10 44.2         97QH4     645  C~1cF1      
2014 09  27.41910  01 03 04.00   +12 34 50.7   23.2R 97QH4     695  C~1LJ1      
2014 09  27.47242  01 03 03.75   +12 34 49.2         97QH4     695  C~1LJ1      

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     0.20       0.00     0.29
  2   0.0001     -4.41    -0.51       0.38     0.48
  3   0.0002     -6.40    -0.10      -0.07    -0.09
  4   0.0027    -67.01    -0.55       2.94     0.20
  5   0.0028    -71.28    -0.84       3.26     0.32
  6   0.0030    -74.79    -0.85       3.47     0.34
  7   0.0134   -336.36     0.41      14.72    -0.18
  8   0.0135   -340.67    -0.04      14.95    -0.15
  9   0.0137   -344.13     0.08      15.25    -0.03
 10   0.0733  -1931.18    -0.22      84.06     0.45
 11   0.0734  -1932.67     0.08      83.61    -0.07
 12   0.0736  -1939.11     0.02      84.22     0.22
 13   0.0761  -2006.79    -0.11      87.10     0.24
 14   0.0763  -2010.65    -0.66      87.24     0.22
 15   0.1059  -2789.04     0.88     120.70    -0.49
 16   0.1061  -2793.88     0.70     120.83    -0.60
 17   0.1063  -2798.64     0.68     121.15    -0.52
 18   0.8379   7173.76     0.43     949.48    -0.57
 19   0.8408   7172.04     0.35     953.06    -0.52
 20   0.8433   7169.53     0.54     956.33    -0.41
 21   2.9482  15963.15     0.05    3395.97     0.24
 22   2.9484  15960.44    -0.22    3396.15     0.21
 23   2.9484  15958.85    -0.13    3396.29     0.19
 24   3.0002  14860.44    -0.07    3469.14    -0.02
 25   3.0004  14855.73     0.19    3469.64     0.18
 26   4.2264  14513.79    -0.06    4855.07     0.01
 27   4.2264  14513.66    -0.16    4855.13     0.07
 28   4.2265  14513.66    -0.07    4855.13     0.06
 29  17.0840  89167.42     0.02   21522.96     0.10
 30  17.0841  89162.70     0.01   21522.80    -0.19

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.

97QH4    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.031    43.041    43.021
ecceobj         0.088     0.088     0.088
incobj         13.154    13.154    13.154
qmin           38.421    38.439    38.409
qmax           47.276    47.319    47.272
amean          42.753    42.759    42.743
amin           42.421    42.415    42.400
amax           43.115    43.119    43.105
emean           0.082     0.082     0.082
emin            0.068     0.069     0.068
emax            0.098     0.098     0.098
imean          13.418    13.418    13.415
imin           12.698    12.700    12.692
imax           14.069    14.063    14.071
excite_mean     0.246     0.246     0.246
fracstop        1.000     1.000     1.000
cjmean          3.014     3.014     3.013

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       180.1     180.1     180.3
kozaiamp        179.9     180.0     180.0