Orbit Fit and Astrometric record for 127871

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: 127871    
# Created Tue Oct 17 01:36:30 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   24 observations of   25
# Arc:  11.09y
# First observation: 2002/02/06
#  Last observation: 2013/03/12
# Chi-squared of fit:    74.60 DOF:   42 RMS:  0.31
# Min/Max residuals:    -0.57    1.50
# Exact a, adot, b, bdot, g, gdot:
  1.604442E-05  3.567781E-02 -2.656998E-06  1.950614E-04  3.149168E-02  2.397661E-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
    2.414103  160.793164    0.386400    0.038004   -0.903446  2452311.871643
# Heliocentric elements and errors
Epoch:              2452312.5000  =  2002/02/07
Mean Anomaly:           36.26603 +/-     0.000
Argument of Peri:       38.72017 +/-     0.000
Long of Asc Node:       78.43170 +/-     0.000
Inclination:             2.37191 +/-     0.000
Eccentricity:         0.09008786 +/-    0.0000
Semi-Major Axis:     35.09902729 +/-    0.0000
Time of Perihelion: 2444661.1412 +/-       0.0
Perihelion:          31.93703118 +/-    0.0000
Aphelion:            38.26102340 +/-    0.0000
Period (y)              207.9461 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.68599602 +/-    0.0000
Ecliptic Y           11.10473708 +/-    0.0000
Ecliptic Z            1.33747250 +/-    0.0000
Ecliptic XDOT        -0.00122492 +/-    0.0000
Ecliptic YDOT        -0.00286154 +/-    0.0000
Ecliptic ZDOT         0.00002594 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.66086702 +/-    0.0000
Geocenter to KBO     31.75440889 +/-    0.0000
# Hcoef:  7.01

The following table shows the complete astrometric record for 127871. 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 (127871) followed by the observatory code and reference code for the source of the astrometry.

2002 02  06.37090  10 52 48.66   +09 45 08.5   21.3R 127871    695  Ck0093      
2002 02  06.46772  10 52 48.07   +09 45 11.3         127871    695  Ck0093      
2002 02  08.53339  10 52 37.09   +09 46 22.6         127871    695  Ck0093      
2003 03  31.20235  10 55 38.79   +09 28 27.4   21.8R 127871    695  Ch8428      
2003 04  01.18109  10 55 33.93   +09 28 54.9         127871    695  Ch8428      
2003 04  01.27694  10 55 33.46   +09 28 57.7         127871    695  Ch8428      
2003 04  20.97745  10 54 10.53   +09 36 25.6   20.5R 127871    304  Ch8428      
2003 04  21.03880  10 54 10.32   +09 36 26.7         127871    304  Ch8428      
2003 05  01.19380  10 53 40.59   +09 38 48.6   22.2R 127871    688  Ch8428      
2003 05  01.25677  10 53 40.42   +09 38 49.6         127871    688  Ch8428      
2003 05  31.26893  10 53 16.34   +09 39 01.3   22.0R 127871    568  Ci1570      
2003 06  01.26390  10 53 17.26   +09 38 51.1         127871    568  Ci1570      
2004 02  21.35918  11 06 48.74   +08 20 16.6   21.4R 127871    695  Ck0093      
2004 02  21.40196  11 06 48.50   +08 20 18.1   21.4R 127871    695  Ck0093      
2004 02  22.35189  11 06 43.20   +08 20 51.9   21.2R 127871    695  Ck0870      
2004 02  22.40404  11 06 42.91   +08 20 54.1         127871    695  Ck0870      
2006 01  30.39123  11 23 35.43   +06 33 54.7   23.1R 127871    688  Cq1757      
2006 01  30.46767  11 23 35.12   +06 33 56.7         127871    688  Cq1757      
2009 01  19.48290  11 46 05.64   +04 07 29.5   23.6R 127871    250  S~06HD      
2009 01  19.48915  11 46 05.63   +04 07 29.7         127871    250  S~06HD      
2009 01  19.49609  11 46 05.61   +04 07 29.8         127871    250  S~06HD      
2009 01  19.54609  11 46 05.48   +04 07 30.9         127871    250  S~06HD      
2013 03  12.27040  12 11 03.80   +01 23 40.0   22.1R 127871    695  C~0unU      
2013 03  12.32348  12 11 03.53   +01 23 42.1         127871    695  C~0unU      
2013 03  13.29330  12 10 58.27   +01 24 16.8         127871    695  C~0unU      

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    -0.23       0.00     1.50
  2   0.0003      0.00    -0.57       0.00    -0.10
  3   0.0059      0.00 (  -3.45)      0.00 (   1.13)
  4   1.1440      0.00     0.22       0.00    -0.03
  5   1.1466      0.00    -0.08       0.00     0.05
  6   1.1469      0.00     0.08       0.00     0.19
  7   1.2008      0.00     0.04       0.00    -0.08
  8   1.2010      0.00     0.11       0.00    -0.04
  9   1.2288      0.00     0.07       0.00     0.03
 10   1.2290      0.00    -0.11       0.00     0.37
 11   1.3112      0.00    -0.11       0.00    -0.31
 12   1.3139      0.00    -0.13       0.00    -0.26
 13   2.0397      0.00     0.40       0.00     0.07
 14   2.0398      0.00     0.42       0.00     0.04
 15   2.0424      0.00     0.02       0.00    -0.23
 16   2.0425      0.00     0.10       0.00     0.10
 17   3.9809      0.00    -0.46       0.00    -0.34
 18   3.9811      0.00    -0.34       0.00    -0.57
 19   6.9517      0.00     0.18       0.00     0.04
 20   6.9517      0.00     0.27       0.00     0.11
 21   6.9517      0.00     0.23       0.00     0.07
 22   6.9519      0.00     0.16       0.00     0.15
 23  11.0935      0.00    -0.10       0.00    -0.12
 24  11.0936      0.00     0.22       0.00     0.07
 25  11.0963      0.00     0.07       0.00    -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.

127871    quality flag:3

Type:           5:4E      5:4E      5:4E

axisobj        34.876    34.876    34.876
ecceobj         0.086     0.086     0.086
incobj          2.372     2.372     2.372
qmin           31.350    31.345    31.347
qmax           38.802    38.787    38.811
amean          34.945    34.945    34.945
amin           34.606    34.606    34.607
amax           35.294    35.296    35.292
emean           0.081     0.081     0.081
emin            0.061     0.061     0.061
emax            0.100     0.100     0.100
imean           2.489     2.489     2.489
imin            1.126     1.125     1.127
imax            3.517     3.517     3.517
excite_mean     0.093     0.093     0.093
fracstop        1.000     1.000     1.000
cjmean          3.007     3.007     3.007

libcent 0       179.0     179.4     179.1
libamp  0        73.5      74.0      73.6
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       179.8     179.8     179.9
kozaiamp        180.0     180.0     180.0