Orbit Fit and Astrometric record for 04DL64

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: 04DL64    
# Created Wed Sep 26 00:57:37 2018
# Orbit generated from Bernstein formalism
# Fitting    5 observations of    5
# Arc:  17.91d
# First observation: 2004/02/26
#  Last observation: 2004/03/15
Preliminary a, adot, b, bdot, g, gdot:
  -0.000000   0.044919  -0.000001  -0.000295   0.027374   0.000000
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# Chi-squared of fit:     1.25 DOF:    5 RMS:  0.09
# Min/Max residuals:    -0.11    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.540494E-05  2.288629E-02 -1.018617E-06 -3.152764E-04  2.384807E-02 -6.210105E-03
# Covariance matrix:
  1.0514E-10  1.5900E-07  4.2833E-13  1.4343E-10  2.5605E-08  3.0919E-07
  1.5900E-07  2.4162E-04  6.5082E-10  2.1801E-07  3.8907E-05  4.6708E-04
  4.2833E-13  6.5082E-10  4.9774E-13 -9.7805E-12  1.0480E-10  1.2657E-09
  1.4343E-10  2.1801E-07 -9.7805E-12  7.2785E-10  3.5099E-08  4.1561E-07
  2.5605E-08  3.8907E-05  1.0480E-10  3.5099E-08  6.2653E-06  7.5536E-05
  3.0919E-07  4.6708E-04  1.2657E-09  4.1561E-07  7.5536E-05  1.2312E-03
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.665928  170.025495    0.220338   -0.011115   -0.960733  2453061.883233
# Heliocentric elements and errors
Epoch:              2453060.5000  =  2004/02/25
Mean Anomaly:          301.90711 +/-    77.403
Argument of Peri:      308.96125 +/-   203.786
Long of Asc Node:      310.01947 +/-    19.860
Inclination:             1.01883 +/-     0.427
Eccentricity:         0.27621779 +/-    1.4339
Semi-Major Axis:     46.60936278 +/-   24.5602
Time of Perihelion: 2471816.0018 +/-   20117.9
Perihelion:          33.73502739 +/-   69.1588
Aphelion:            59.48369816 +/-   73.8200
Period (y)              318.2130 +/-    251.52
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -42.20739437 +/-    4.3342
Ecliptic Y            7.64783324 +/-    0.7626
Ecliptic Z           -0.48737630 +/-    0.0512
Ecliptic XDOT         0.00024376 +/-    0.0043
Ecliptic YDOT        -0.00271796 +/-    0.0009
Ecliptic ZDOT        -0.00002776 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.89744781 +/-    4.2667
Geocenter to KBO     41.93212232 +/-    4.4011
# Hcoef:  7.02

The following table shows the complete astrometric record for 04DL64. 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 (04DL64) followed by the observatory code and reference code for the source of the astrometry.

2004 02  26.38249  11 22 17.29   +03 20 17.8   23.0R 04DL64    695  Ck0899      
2004 02  26.46107  11 22 16.94   +03 20 19.7         04DL64    695  Ck0899      
2004 02  27.38600  11 22 12.95   +03 20 44.8         04DL64    695  Ck0899      
2004 03  15.21538  11 20 58.61   +03 28 35.0   22.9R 04DL64    695  Ck4349      
2004 03  15.29458  11 20 58.24   +03 28 37.3         04DL64    695  Ck4349      

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     0.17
  2   0.0002     -5.57    -0.03      -0.31    -0.08
  3   0.0027    -70.37     0.08      -0.67    -0.10
  4   0.0488  -1278.74     0.11      -4.80     0.01
  5   0.0490  -1284.74    -0.11      -4.85    -0.01

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.

04DL64    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        46.047    46.047    46.047
ecceobj         0.273     0.273     0.273
incobj          1.022     1.022     1.022
qmin           30.990    31.648    31.281
qmax          140.874    62.171    61.394
amean          59.051    44.121    41.922
amin           41.734    38.681    37.218
amax           86.710    47.540    47.473
emean           0.425     0.246     0.221
emin            0.222     0.149     0.115
emax            0.625     0.309     0.303
imean           3.886     4.832     4.579
imin            1.290     1.456     2.553
imax            6.205     7.051     6.186
excite_mean     0.432     0.261     0.236
fracstop        1.000     1.000     1.000
cjmean          2.997     3.020     3.012

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       183.6     181.4     179.8
kozaiamp        179.9     179.9     180.0