Orbit Fit and Astrometric record for 04DH64

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: 04DH64    
# Created Tue Dec 12 02:37:23 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   25
# Arc:   9.05y
# First observation: 2004/02/26
#  Last observation: 2013/03/14
Preliminary a, adot, b, bdot, g, gdot:
  -0.000318   0.017550  -0.000022   0.001080   0.019942   0.000000
# Chi-squared of fit:    13.56 DOF:   34 RMS:  0.15
# Min/Max residuals:    -0.33    0.37
# Exact a, adot, b, bdot, g, gdot:
  1.367687E-05  1.729119E-02 -1.741283E-06  1.062446E-03  2.034616E-02 -9.943324E-04
# Covariance matrix:
  2.2541E-13 -1.7439E-13  7.1628E-15 -9.9627E-15  5.9871E-14 -9.9733E-13
 -1.7439E-13  2.3099E-13 -1.0183E-14  1.4199E-14 -6.4151E-14  1.4213E-12
  7.1628E-15 -1.0183E-14  1.1517E-13 -1.8453E-14  3.2944E-15 -6.4829E-14
 -9.9627E-15  1.4199E-14 -1.8453E-14  8.5915E-15 -4.1801E-15  9.0380E-14
  5.9871E-14 -6.4151E-14  3.2944E-15 -4.1801E-15  2.6227E-13 -4.2001E-13
 -9.9733E-13  1.4213E-12 -6.4829E-14  9.0380E-14 -4.2001E-13  9.0468E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.215626  137.779552   -0.323631    0.003568   -0.931047  2453061.724153
# Heliocentric elements and errors
Epoch:              2453060.5000  =  2004/02/25
Mean Anomaly:          218.68612 +/-     0.070
Argument of Peri:      150.54495 +/-     0.068
Long of Asc Node:      134.70310 +/-     0.001
Inclination:             3.51214 +/-     0.000
Eccentricity:         0.08777160 +/-    0.0002
Semi-Major Axis:     46.75533120 +/-    0.0048
Time of Perihelion: 2498898.6901 +/-      21.7
Perihelion:          42.65154082 +/-    0.0083
Aphelion:            50.85912159 +/-    0.0088
Period (y)              319.7090 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.30908543 +/-    0.0009
Ecliptic Y           33.41533511 +/-    0.0008
Ecliptic Z            0.18488720 +/-    0.0000
Ecliptic XDOT        -0.00146774 +/-    0.0000
Ecliptic YDOT        -0.00182007 +/-    0.0000
Ecliptic ZDOT         0.00014261 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   50.08579299 +/-    0.0009
Geocenter to KBO     49.14932915 +/-    0.0012
# Hcoef:  5.91

The following table shows the complete astrometric record for 04DH64. 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 (04DH64) followed by the observatory code and reference code for the source of the astrometry.

2004 02  26.22341  09 21 09.71   +15 42 32.3   22.5R 04DH64    695  Ck0899      
2004 02  26.35224  09 21 09.18   +15 42 34.3         04DH64    695  Ck0899      
2004 02  27.19691  09 21 05.89   +15 42 49.9         04DH64    695  Ck0899      
2004 03  15.18740  09 20 05.36   +15 47 38.6   22.3R 04DH64    695  Ck4349      
2004 03  15.27421  09 20 05.08   +15 47 39.9         04DH64    695  Ck4349      
2004 03  20.20575  09 19 50.04   +15 48 51.6   22.5R 04DH64    662  Ck2275      
2004 03  20.29647  09 19 49.78   +15 48 52.7         04DH64    662  Ck2275      
2005 03  09.25809  09 24 26.09   +15 31 10.0   22.5R 04DH64    695  Cn3122      
2005 03  09.34998  09 24 25.75   +15 31 11.9         04DH64    695  Cn3122      
2005 03  10.248106 09 24 22.64   +15 31 27.1   22.5V 04DH64    645  C~2JxA      
2005 03  10.248935 09 24 22.65   +15 31 27.1   23.1V 04DH64    645  C~2JxA      
2005 03  10.251423 09 24 22.65   +15 31 27.1         04DH64    645  C~2JxA      
2005 03  10.25899  09 24 22.57   +15 31 27.2         04DH64    695  Cn3122      
2005 04  10.15814  09 23 01.46   +15 37 59.1   23.0R 04DH64    695  Cn3122      
2005 04  11.15904  09 22 59.88   +15 38 06.7         04DH64    695  Cn3122      
2005 04  12.15767  09 22 58.37   +15 38 14.3         04DH64    695  Cn3122      
2005 04  13.16931  09 22 56.90   +15 38 21.5         04DH64    695  Cn3122      
2005 12  06.459038 09 33 40.41   +14 49 31.3   22.3V 04DH64    645  C~2JxA      
2005 12  06.459867 09 33 40.42   +14 49 31.4   22.4V 04DH64    645  C~2JxA      
2005 12  06.462355 09 33 40.42   +14 49 31.4   23.6V 04DH64    645  C~2JxA      
2009 02  26.19789  09 41 05.04   +14 25 29.4   23.7R 04DH64    688  C~04qI      
2009 02  26.29528  09 41 04.61   +14 25 31.1         04DH64    688  C~04qI      
2013 03  13.23881  09 56 02.75   +13 23 50.4   22.7R 04DH64    695  C~0ud8      
2013 03  14.19466  09 55 59.30   +13 24 08.8         04DH64    695  C~0ud8      
2013 03  14.34503  09 55 58.77   +13 24 11.5         04DH64    695  C~0ud8      

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 (  -0.05)      0.00 (   0.53)
  2   0.0004     -7.90    -0.18      -0.44     0.07
  3   0.0027    -57.90    -0.33      -0.12    -0.10
  4   0.0492   -978.17    -0.12       7.94    -0.02
  5   0.0494   -982.42    -0.09       7.95    -0.03
  6   0.0629  -1211.02     0.12      10.11     0.02
  7   0.0632  -1214.93     0.31      10.02    -0.08
  8   1.0323   2909.45     0.37     224.20    -0.20
  9   1.0325   2904.19     0.11     224.48     0.08
 10   1.0350   2856.73 (   0.45)    225.02 (   0.20)
 11   1.0350   2856.87 (   0.63)    225.06 (   0.25)
 12   1.0350   2856.87 (   0.77)    225.06 (   0.25)
 13   1.0350   2855.74     0.03     224.80    -0.02
 14   1.1196   1619.90    -0.17     235.57     0.04
 15   1.1223   1595.84     0.05     235.77    -0.05
 16   1.1251   1572.75     0.06     236.28     0.18
 17   1.1278   1550.33    -0.08     236.59     0.21
 18   1.7775  11324.10    -0.07     378.31    -0.16
 19   1.7775  11324.21     0.06     378.45    -0.02
 20   1.7775  11324.21     0.11     378.45    -0.02
 21   5.0020  17930.55 (   0.19)   1104.90 (   0.71)
 22   5.0023  17924.04    -0.22    1104.46     0.25
 23   9.0432  31686.51    -0.04    2010.70     0.01
 24   9.0458  31631.64    -0.11    2010.72    -0.03
 25   9.0462  31623.26     0.22    2010.60    -0.10

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.

04DH64    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.427    46.441    46.413
ecceobj         0.092     0.092     0.092
incobj          3.524     3.524     3.524
qmin           41.552    41.592    41.524
qmax           51.752    51.742    51.747
amean          46.502    46.516    46.488
amin           46.127    46.134    46.104
amax           46.917    46.929    46.894
emean           0.090     0.090     0.090
emin            0.078     0.077     0.078
emax            0.103     0.103     0.104
imean           2.498     2.496     2.499
imin            2.115     2.116     2.115
imax            2.845     2.842     2.848
excite_mean     0.100     0.100     0.100
fracstop        1.000     1.000     1.000
cjmean          3.120     3.120     3.120

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       180.7     181.0     180.4
kozaiamp        180.0     179.9     180.0