Orbit Fit and Astrometric record for 01FU172

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: 01FU172   
# Created Thu Oct 19 01:37:10 2017
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   31
# Arc:   5.18y
# First observation: 2001/03/22
#  Last observation: 2006/05/26
Preliminary a, adot, b, bdot, g, gdot:
   0.000109   0.037959  -0.000064  -0.017413   0.033823   0.000000
# Chi-squared of fit:    38.99 DOF:   52 RMS:  0.20
# Min/Max residuals:    -0.47    0.50
# Exact a, adot, b, bdot, g, gdot:
  1.842960E-05  3.869355E-02 -8.173573E-06 -1.781332E-02  3.402438E-02  6.636648E-03
# Covariance matrix:
  1.0729E-13 -8.2803E-14 -8.1713E-15  4.2026E-14  8.7488E-14 -4.9583E-13
 -8.2803E-14  3.2361E-13  3.3435E-14 -1.7029E-13 -1.7706E-14  2.0062E-12
 -8.1713E-15  3.3435E-14  7.0911E-14 -3.6529E-14 -5.1754E-15  2.2297E-13
  4.2026E-14 -1.7029E-13 -3.6529E-14  1.1576E-13  2.7669E-14 -1.1366E-12
  8.7488E-14 -1.7706E-14 -5.1754E-15  2.7669E-14  2.6922E-13 -3.2826E-13
 -4.9583E-13  2.0062E-12  2.2297E-13 -1.1366E-12 -3.2826E-13  1.3393E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.494795 -151.983104    0.436425    0.039026   -0.899726  2451990.954023
# Heliocentric elements and errors
Epoch:              2451990.5000  =  2001/03/22
Mean Anomaly:           23.45126 +/-     0.007
Argument of Peri:      133.56221 +/-     0.012
Long of Asc Node:       32.44028 +/-     0.000
Inclination:            24.77919 +/-     0.000
Eccentricity:         0.26759524 +/-    0.0001
Semi-Major Axis:     39.24676289 +/-    0.0052
Time of Perihelion: 2446140.3377 +/-       1.4
Perihelion:          28.74451614 +/-    0.0059
Aphelion:            49.74900964 +/-    0.0080
Period (y)              245.8748 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.91759732 +/-    0.0004
Ecliptic Y          -13.82569073 +/-    0.0002
Ecliptic Z            1.27913124 +/-    0.0000
Ecliptic XDOT         0.00092812 +/-    0.0000
Ecliptic YDOT        -0.00302569 +/-    0.0000
Ecliptic ZDOT        -0.00140860 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   30.28766987 +/-    0.0004
Geocenter to KBO     29.39068954 +/-    0.0004
# Hcoef:  8.26

The following table shows the complete astrometric record for 01FU172. 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 (01FU172) followed by the observatory code and reference code for the source of the astrometry.

2001 03  22.45328  13 47 41.29   -08 26 15.9   22.6R 01FU172   695  Cc9631      
2001 03  22.46138  13 47 41.24   -08 26 15.6   22.6R 01FU172   695  Cc9631      
2001 03  22.49623  13 47 41.05   -08 26 15.0   22.7R 01FU172   695  Cc9631      
2001 03  23.46237  13 47 35.59   -08 25 51.9   22.6R 01FU172   695  Cc9631      
2001 03  23.46890  13 47 35.56   -08 25 51.8   22.5R 01FU172   695  Cc9631      
2001 03  23.47545  13 47 35.52   -08 25 51.7   22.5R 01FU172   695  Cc9631      
2001 03  29.45718  13 47 00.63   -08 23 25.8         01FU172   695  Cc9631      
2001 03  29.46496  13 47 00.57   -08 23 25.7         01FU172   695  Cc9631      
2001 03  29.47257  13 47 00.51   -08 23 25.6   22.9R 01FU172   695  Cc9631      
2001 03  30.45616  13 46 54.59   -08 23 01.3   22.6R 01FU172   695  Cc9631      
2001 03  30.46279  13 46 54.56   -08 23 00.9   22.8R 01FU172   695  Cc9631      
2001 03  30.46947  13 46 54.52   -08 23 00.9   22.8R 01FU172   695  Cc9631      
2001 04  26.44933  13 44 03.27   -08 11 27.8   23.0R 01FU172   568  Cd0861      
2001 04  26.49586  13 44 02.99   -08 11 26.5         01FU172   568  Cd0861      
2001 04  27.45444  13 43 56.89   -08 11 02.9         01FU172   568  Cd0861      
2001 05  19.30284  13 41 47.52   -08 03 19.4   23.1R 01FU172   568  Ce6595      
2001 05  19.50451  13 41 46.42   -08 03 15.4         01FU172   568  Ce6595      
2001 05  20.47154  13 41 41.34   -08 02 59.7         01FU172   568  Ce6595      
2001 06  26.98957  13 39 28.01   -07 59 14.9         01FU172   304  Cd2352      
2001 06  27.15085  13 39 27.72   -07 59 15.8         01FU172   304  Cd2352      
2002 03  08.53854  13 55 44.98   -10 14 07.6   22.7R 01FU172   568  Cf2334      
2002 03  08.59688  13 55 44.73   -10 14 06.6         01FU172   568  Cf2334      
2002 03  13.39408  13 55 22.82   -10 12 45.9         01FU172   696  Cf2334      
2002 03  13.45266  13 55 22.53   -10 12 44.9         01FU172   696  Cf2334      
2002 03  14.38400  13 55 18.07   -10 12 28.2         01FU172   696  Cf2334      
2002 03  14.40296  13 55 17.94   -10 12 27.4         01FU172   696  Cf2334      
2004 04  22.39709  14 05 12.04   -13 19 54.0   22.9R 01FU172   568  Ck9562      
2004 04  22.46108  14 05 11.61   -13 19 52.5         01FU172   568  Ck9562      
2006 05  26.237865 14 15 35.60   -16 22 11.0         01FU172   645  C~1SKo      
2006 05  26.238695 14 15 35.59   -16 22 11.0         01FU172   645  C~1SKo      
2006 05  26.241183 14 15 35.58   -16 22 10.9         01FU172   645  C~1SKo      

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    -0.09       0.00    -0.02
  2   0.0000     -0.80    -0.18       0.02     0.06
  3   0.0001     -3.65     0.01      -0.42    -0.10
  4   0.0028    -87.59    -0.31      -7.59     0.17
  5   0.0028    -88.04    -0.18      -7.66     0.16
  6   0.0028    -88.63    -0.19      -7.77     0.09
  7   0.0192   -624.41     0.19     -55.30     0.46
  8   0.0192   -625.28     0.04     -55.52     0.30
  9   0.0192   -626.15    -0.11     -55.75     0.14
 10   0.0219   -716.90    -0.07     -64.26    -0.20
 11   0.0219   -717.46    -0.00     -64.04     0.07
 12   0.0219   -718.01     0.07     -64.25    -0.08
 13   0.0958  -3340.36    -0.02    -322.39    -0.47
 14   0.0959  -3344.70     0.23    -322.66    -0.22
 15   0.0986  -3437.75     0.07    -332.97    -0.22
 16   0.1584  -5398.42     0.12    -587.70    -0.31
 17   0.1589  -5415.12    -0.15    -589.82     0.17
 18   0.1616  -5491.24     0.44    -602.22    -0.17
 19   0.2643  -7422.19     0.03   -1104.06    -0.22
 20   0.2647  -7425.89    -0.31   -1106.45    -0.30
 21   0.9612   8986.93    -0.04   -3536.10    -0.23
 22   0.9614   8983.12     0.08   -3536.45    -0.09
 23   0.9745   8651.25     0.27   -3573.91     0.50
 24   0.9747   8646.88     0.24   -3574.47     0.45
 25   0.9772   8579.23 (   0.72)  -3581.85 (   0.55)
 26   0.9773   8577.15 (   0.07)  -3581.77 (   0.79)
 27   3.0854  20734.84     0.02  -11163.69     0.18
 28   3.0856  20728.36    -0.08  -11164.41     0.12
 29   5.1767  33203.54     0.01  -18586.12    -0.08
 30   5.1767  33203.41    -0.06  -18586.16    -0.12
 31   5.1767  33203.23    -0.02  -18586.12    -0.05

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.

01FU172    quality flag:3

Type:           3:2E      3:2E      3:2E
Type:          6:4II     6:4II          

axisobj        39.133    39.148    39.118
ecceobj         0.265     0.265     0.265
incobj         24.796    24.796    24.796
qmin           25.856    25.845    25.925
qmax           53.691    53.533    53.547
amean          39.454    39.453    39.454
amin           39.082    39.087    39.082
amax           39.957    39.919    39.940
emean           0.264     0.265     0.263
emin            0.171     0.171     0.173
emax            0.345     0.344     0.342
imean          24.114    24.092    24.154
imin           21.201    21.159    21.277
imax           26.800    26.812    26.784
excite_mean     0.490     0.490     0.490
fracstop        1.000     1.000     1.000
cjmean          2.774     2.774     2.774

libcent 0       180.5     179.4     180.2
libamp  0        45.5      40.5      52.1
libcent 1       180.8     178.9    -180.0
libamp  1       171.3     162.7    -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        87.8      87.6      88.0
kozaiamp         56.5      57.1      55.7