Orbit Fit and Astrometric record for 38083

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: 38083     
# Created Fri Aug  1 01:36:35 2014
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   28 observations of   28
# Arc:   9.14y
# First observation: 1999/04/17
#  Last observation: 2008/06/07
# Chi-squared of fit:   112.34 DOF:   50 RMS:  0.35
# Min/Max residuals:    -0.91    1.70
# Exact a, adot, b, bdot, g, gdot:
  1.504396E-05  2.650693E-02 -4.832714E-06 -5.928170E-03  2.676556E-02  3.901845E-03
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.739652 -178.157983   -0.422310    0.027661   -0.918477  2451285.639553
# Heliocentric elements and errors
Epoch:              2451286.5000  =  1999/04/18
Mean Anomaly:           76.31760 +/-     0.000
Argument of Peri:       78.23403 +/-     0.000
Long of Asc Node:        9.97633 +/-     0.000
Inclination:            12.79238 +/-     0.000
Eccentricity:         0.15473095 +/-    0.0000
Semi-Major Axis:     38.78166980 +/-    0.0000
Time of Perihelion: 2432585.6916 +/-       0.0
Perihelion:          32.78094504 +/-    0.0000
Aphelion:            44.78239455 +/-    0.0000
Period (y)              241.5171 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.22160329 +/-    0.0000
Ecliptic Y           -1.65191943 +/-    0.0000
Ecliptic Z            1.13405220 +/-    0.0000
Ecliptic XDOT        -0.00033242 +/-    0.0000
Ecliptic YDOT        -0.00271464 +/-    0.0000
Ecliptic ZDOT        -0.00059398 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.27399596 +/-    0.0000
Geocenter to KBO     37.36138958 +/-    0.0000
# Hcoef:  6.76

The following table shows the complete astrometric record for 38083. 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 (38083) followed by the observatory code and reference code for the source of the astrometry.

1999 04  17.13881  12 09 31.63   +00 51 49.1   22.4R 38083     695  Ca4930      
1999 04  17.18654  12 09 31.39   +00 51 50.3         38083     695  Ca4930      
1999 04  17.26738  12 09 30.98   +00 51 52.0         38083     695  Ca4930      
1999 04  18.17345  12 09 26.97   +00 52 13.9         38083     695  Ca4930      
1999 05  05.88205  12 08 16.39   +00 58 18.2         38083     950  Ca4930      
1999 05  05.94278  12 08 16.18   +00 58 18.4         38083     950  Ca4930      
1999 05  06.00443  12 08 15.94   +00 58 20.2         38083     950  Ca4930      
1999 05  07.01150  12 08 12.64   +00 58 36.6         38083     950  Ca4930      
1999 05  07.04517  12 08 12.43   +00 58 37.4         38083     950  Ca4930      
2000 06  23.88846  12 11 59.83   +00 07 23.0         38083     950  Cb6477      
2000 06  24.89813  12 12 00.62   +00 07 12.4         38083     950  Cb6477      
2000 06  25.89070  12 12 01.47   +00 07 01.2         38083     950  Cb6477      
2001 02  16.16225  12 24 05.58   -01 23 31.8   22.5R 38083     950  Cc6426      
2001 02  16.20072  12 24 05.44   -01 23 31.0   23.1R 38083     950  Cc6426      
2001 03  24.11944  12 21 23.41   -01 07 47.6   20.8  38083     304  Cf1478      
2001 03  24.15373  12 21 23.23   -01 07 46.8         38083     304  Cf1478      
2001 05  19.28213  12 17 28.44   -00 46 31.6   22.6R 38083     568  Ce6450      
2001 05  20.27983  12 17 25.88   -00 46 19.9         38083     568  Ce6450      
2001 05  20.36542  12 17 25.66   -00 46 19.0         38083     568  Ce6450      
2002 02  06.54211  12 29 31.10   -02 19 57.6   22.9R 38083     568  Cf1478      
2002 02  06.60974  12 29 30.89   -02 19 56.7         38083     568  Cf1478      
2004 01  25.20698  12 39 37.99   -04 07 03.9   22.7V 38083     J86  Cj8325      
2004 01  25.21757  12 39 38.01   -04 07 04.1   23.1V 38083     J86  Cj8325      
2004 01  25.22106  12 39 37.96   -04 07 04.0   23.4V 38083     J86  Cj8325      
2004 01  28.29015  12 39 32.98   -04 06 41.6         38083     809  Cj8325      
2004 01  28.33801  12 39 32.90   -04 06 41.3         38083     809  Cj8325      
2008 06  07.00761  12 50 23.77   -06 46 11.1         38083     807  Cz1541      
2008 06  07.10413  12 50 23.58   -06 46 10.7         38083     807  Cz1541      

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    -0.08       0.00     0.41
  2   0.0001      0.00    -0.05       0.00     0.22
  3   0.0004      0.00    -0.65       0.00    -0.04
  4   0.0028      0.00    -0.09       0.00    -0.01
  5   0.0513      0.00     0.02       0.00     0.16
  6   0.0515      0.00     0.09       0.00    -0.66
  7   0.0517      0.00    -0.25       0.00     0.12
  8   0.0544      0.00     1.70       0.00    -0.02
  9   0.0545      0.00     0.29       0.00     0.23
 10   1.1875      0.00    -0.33       0.00    -0.06
 11   1.1903      0.00    -0.14       0.00     0.23
 12   1.1930      0.00    -0.27       0.00     0.34
 13   1.8372      0.00    -0.04       0.00    -0.02
 14   1.8373      0.00     0.02       0.00    -0.04
 15   1.9356      0.00     0.12       0.00     0.16
 16   1.9357      0.00     0.02       0.00    -0.03
 17   2.0894      0.00     0.16       0.00     0.01
 18   2.0921      0.00     0.10       0.00     0.15
 19   2.0923      0.00     0.15       0.00     0.08
 20   2.8101      0.00    -0.15       0.00    -0.74
 21   2.8103      0.00    -0.32       0.00    -0.91
 22   4.7750      0.00    -0.24       0.00     0.11
 23   4.7750      0.00     0.31       0.00    -0.16
 24   4.7750      0.00    -0.36       0.00    -0.08
 25   4.7834      0.00     0.11       0.00     0.11
 26   4.7836      0.00     0.25       0.00     0.03
 27   9.1413      0.00     0.20       0.00     0.43
 28   9.1416      0.00     0.04       0.00    -0.11

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.

38083    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        38.827    38.827    38.827
ecceobj         0.156     0.156     0.156
incobj         12.787    12.787    12.787
qmin           32.137    32.493    32.600
qmax           46.706    46.188    46.130
amean          39.120    39.116    39.116
amin           38.745    38.762    38.759
amax           39.575    39.584    39.588
emean           0.134     0.128     0.124
emin            0.097     0.094     0.089
emax            0.181     0.168     0.167
imean          17.176    17.007    17.008
imin           13.028    13.028    13.028
imax           19.554    19.434    19.437
excite_mean     0.325     0.320     0.319
fracstop        1.000     1.000     1.000
cjmean          2.922     2.926     2.927

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       180.6     181.3     180.9
kozaiamp        180.0     180.0     180.0