Orbit Fit and Astrometric record for 04DM64

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: 04DM64    
# Created Mon Nov 19 02:08:26 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   16 observations of   16
# Arc:  11.07y
# First observation: 2004/02/26
#  Last observation: 2015/03/23
# Chi-squared of fit:   126.19 DOF:   26 RMS:  0.50
# Min/Max residuals:    -1.03    1.50
# Exact a, adot, b, bdot, g, gdot:
  1.623935E-05  2.471049E-02 -8.774952E-07 -1.361390E-03  2.459598E-02 -2.558718E-03
# Covariance matrix:
  2.9120E-13 -9.4605E-14  1.4605E-15  3.8200E-15  2.0956E-13 -2.8363E-13
 -9.4605E-14  2.2295E-13  3.2526E-15 -1.2286E-14 -2.2002E-14  8.4900E-13
  1.4605E-15  3.2526E-15  1.7358E-13 -1.8386E-14  5.4305E-15  1.2993E-14
  3.8200E-15 -1.2286E-14 -1.8386E-14  4.8842E-15  1.8979E-16 -4.7750E-14
  2.0956E-13 -2.2002E-14  5.4305E-15  1.8979E-16  4.4982E-13 -5.6697E-14
 -2.8363E-13  8.4900E-13  1.2993E-14 -4.7750E-14 -5.6697E-14  3.2968E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.853129 -178.991179    0.399198    0.029196   -0.900818  2453061.893113
# Heliocentric elements and errors
Epoch:              2453062.5000  =  2004/02/27
Mean Anomaly:          312.96681 +/-     0.031
Argument of Peri:      209.92898 +/-     0.044
Long of Asc Node:       30.46129 +/-     0.001
Inclination:             3.62113 +/-     0.000
Eccentricity:         0.13760388 +/-    0.0001
Semi-Major Axis:     45.28183454 +/-    0.0058
Time of Perihelion: 2467603.2351 +/-      20.9
Perihelion:          39.05087845 +/-    0.0058
Aphelion:            51.51279062 +/-    0.0072
Period (y)              304.7153 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.54131053 +/-    0.0011
Ecliptic Y           -0.33036765 +/-    0.0000
Ecliptic Z            1.31473308 +/-    0.0000
Ecliptic XDOT         0.00032448 +/-    0.0000
Ecliptic YDOT        -0.00275193 +/-    0.0000
Ecliptic ZDOT        -0.00016053 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.56349516 +/-    0.0011
Geocenter to KBO     40.65715419 +/-    0.0011
# Hcoef:  6.83

The following table shows the complete astrometric record for 04DM64. 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 (04DM64) followed by the observatory code and reference code for the source of the astrometry.

2004 02  26.39237  12 06 39.05   +01 17 56.3   22.7R 04DM64    695  Ck0899      
2004 02  26.46910  12 06 38.74   +01 17 58.3         04DM64    695  Ck0899      
2004 02  27.45149  12 06 34.76   +01 18 25.0         04DM64    695  Ck0899      
2004 03  15.24476  12 05 22.15   +01 26 16.3   22.6R 04DM64    695  Ck4349      
2004 03  15.33224  12 05 21.74   +01 26 19.0         04DM64    695  Ck4349      
2004 07  14.99875  12 01 41.48   +01 44 33.1   21.9R 04DM64    807  Cl0711      
2004 07  15.98770  12 01 44.28   +01 44 12.3         04DM64    807  Cl0711      
2004 07  16.03261  12 01 44.40   +01 44 11.2         04DM64    807  Cl0711      
2005 02  09.41118  12 12 42.96   +00 33 09.5   23.4R 04DM64    688  C~2i4E      
2005 02  09.48756  12 12 42.66   +00 33 10.9         04DM64    688  C~2i4E      
2013 03  12.29804  12 52 29.38   -04 26 02.2   22.7R 04DM64    G37  C~2i4E      
2013 03  12.29974  12 52 29.37   -04 26 01.8   22.6R 04DM64    695  C~2i4E      
2013 03  12.35299  12 52 29.16   -04 26 00.7         04DM64    695  C~2i4E      
2013 03  12.43250  12 52 28.80   -04 25 58.7         04DM64    G37  C~2i4E      
2015 03  23.31780  13 02 30.592  -05 40 29.46  22.6R 04DM64    695              
2015 03  23.38172  13 02 30.306  -05 40 27.75        04DM64    695              

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    -0.07       0.00     0.03
  2   0.0002      0.00     0.01       0.00    -0.02
  3   0.0029      0.00     0.07       0.00     0.34
  4   0.0489      0.00     0.12       0.00    -0.09
  5   0.0491      0.00    -0.02       0.00     0.09
  6   0.3822      0.00    -0.42       0.00    -0.56
  7   0.3849      0.00     0.07       0.00    -0.04
  8   0.3851      0.00    -0.00       0.00    -0.16
  9   0.9556      0.00     0.52       0.00     0.32
 10   0.9558      0.00    -0.35       0.00     0.10
 11   9.0401      0.00    -0.03       0.00    -0.10
 12   9.0401      0.00    -0.08       0.00     0.25
 13   9.0403      0.00     0.20       0.00    -0.05
 14   9.0405      0.00    -0.08       0.00    -0.13
 15  11.0689      0.00     1.42       0.00    -1.00
 16  11.0691      0.00     1.50       0.00    -1.03

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.

04DM64    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.739    44.739    44.739
ecceobj         0.131     0.131     0.132
incobj          3.636     3.636     3.636
qmin           38.410    38.397    38.408
qmax           52.014    52.021    52.017
amean          45.040    45.039    45.040
amin           44.653    44.667    44.660
amax           45.455    45.462    45.448
emean           0.128     0.128     0.128
emin            0.112     0.112     0.112
emax            0.145     0.145     0.145
imean           3.185     3.185     3.185
imin            2.453     2.453     2.452
imax            3.778     3.780     3.779
excite_mean     0.140     0.140     0.140
fracstop        1.000     1.000     1.000
cjmean          3.090     3.090     3.090

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       187.2     187.3     187.2
kozaiamp        180.0     180.0     180.0