Orbit Fit and Astrometric record for 143991

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: 143991    
# Created Fri Oct 20 01:36:36 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   28 observations of   28
# Arc:   3.14y
# First observation: 2003/10/03
#  Last observation: 2006/11/23
# Chi-squared of fit:    90.73 DOF:   50 RMS:  0.32
# Min/Max residuals:    -0.70    0.59
# Exact a, adot, b, bdot, g, gdot:
  1.629295E-05  2.330001E-02  6.180696E-06  8.181775E-03  2.449894E-02 -2.442622E-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
    0.092714   68.361723    0.858101    0.000878   -0.519487  2452915.947633
# Heliocentric elements and errors
Epoch:              2452916.5000  =  2003/10/04
Mean Anomaly:          309.55921 +/-     0.000
Argument of Peri:       64.77070 +/-     0.000
Long of Asc Node:       66.91793 +/-     0.000
Inclination:            19.38150 +/-     0.000
Eccentricity:         0.14253671 +/-    0.0000
Semi-Major Axis:     44.79641240 +/-    0.0000
Time of Perihelion: 2468260.6443 +/-       0.0
Perihelion:          38.41127895 +/-    0.0000
Aphelion:            51.18154585 +/-    0.0000
Period (y)              299.8286 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           16.03702777 +/-    0.0000
Ecliptic Y           38.11170630 +/-    0.0000
Ecliptic Z            0.06631175 +/-    0.0000
Ecliptic XDOT        -0.00252648 +/-    0.0000
Ecliptic YDOT         0.00069911 +/-    0.0000
Ecliptic ZDOT         0.00091407 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.34851032 +/-    0.0000
Geocenter to KBO     40.81818298 +/-    0.0000
# Hcoef:  5.92

The following table shows the complete astrometric record for 143991. 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 (143991) followed by the observatory code and reference code for the source of the astrometry.

2003 10  03.44689  04 26 24.37   +21 47 29.4         143991    568  Cq9908      
2003 10  03.49803  04 26 24.25   +21 47 29.4         143991    568  Cq9908      
2003 10  03.55925  04 26 24.09   +21 47 29.4         143991    568  Cq9908      
2003 12  16.31818  04 20 45.81   +21 40 26.6   22.0g 143991    568  Cq9908      
2003 12  16.34467  04 20 45.67   +21 40 26.4   22.0g 143991    568  Cq9908      
2003 12  16.37098  04 20 45.53   +21 40 26.2   21.9g 143991    568  Cq9908      
2003 12  17.39000  04 20 40.34   +21 40 18.6         143991    568  Cq9908      
2003 12  17.42270  04 20 40.17   +21 40 18.4         143991    568  Cq9908      
2003 12  21.187599 04 20 21.18   +21 39 50.1   21.7V 143991    645  C~1Pyl      
2003 12  21.188428 04 20 21.17   +21 39 50.1   21.6V 143991    645  C~1Pyl      
2003 12  21.190916 04 20 21.16   +21 39 50.1   22.5V 143991    645  C~1Pyl      
2004 12  11.36654  04 26 32.84   +22 22 17.0   21.7r 143991    568  Cq9908      
2004 12  11.39535  04 26 32.69   +22 22 16.7   21.8r 143991    568  Cq9908      
2004 12  11.42484  04 26 32.52   +22 22 16.5   21.7r 143991    568  Cq9908      
2004 12  12.28992  04 26 27.92   +22 22 10.3   21.6r 143991    568  Cq9908      
2005 11  04.40195  04 35 20.57   +23 06 44.3   21.5R 143991    695  Cq9908      
2005 11  04.41300  04 35 20.53   +23 06 44.3   21.5R 143991    695  Cq9908      
2005 11  04.45463  04 35 20.33   +23 06 44.2   21.5R 143991    695  Cq9908      
2005 12  24.26442  04 30 56.52   +23 01 43.1   22.7r 143991    568  C~0DGi      
2005 12  24.36213  04 30 56.02   +23 01 42.5   22.5r 143991    568  C~0DGi      
2005 12  24.39647  04 30 55.85   +23 01 42.2   22.6r 143991    568  C~0DGi      
2005 12  25.40044  04 30 50.86   +23 01 35.7   22.6r 143991    568  C~0DGi      
2006 08  05.26106  04 41 55.72   +23 38 16.9   21.3R 143991    250  S~06HZ      
2006 08  05.26546  04 41 55.74   +23 38 17.0         143991    250  S~06HZ      
2006 08  05.26986  04 41 55.76   +23 38 17.0         143991    250  S~06HZ      
2006 08  05.27426  04 41 55.78   +23 38 17.0         143991    250  S~06HZ      
2006 11  23.35392  04 39 20.12   +23 45 17.0         143991    695  Cs8636      
2006 11  23.45422  04 39 19.56   +23 45 16.5         143991    695  Cs8636      

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    -0.23
  2   0.0001      0.00    -0.10       0.00    -0.21
  3   0.0003      0.00    -0.20       0.00    -0.18
  4   0.2022      0.00    -0.18       0.00     0.30
  5   0.2023      0.00    -0.20       0.00     0.30
  6   0.2024      0.00    -0.23       0.00     0.29
  7   0.2052      0.00     0.40       0.00     0.30
  8   0.2053      0.00     0.40       0.00     0.35
  9   0.2156      0.00     0.22       0.00    -0.43
 10   0.2156      0.00     0.13       0.00    -0.42
 11   0.2156      0.00     0.17       0.00    -0.40
 12   1.1907      0.00     0.12       0.00     0.29
 13   1.1908      0.00     0.22       0.00     0.20
 14   1.1909      0.00     0.08       0.00     0.22
 15   1.1933      0.00     0.19       0.00     0.34
 16   2.0889      0.00    -0.26       0.00    -0.15
 17   2.0889      0.00    -0.06       0.00    -0.11
 18   2.0890      0.00    -0.04       0.00    -0.04
 19   2.2254      0.00     0.16       0.00    -0.28
 20   2.2256      0.00     0.12       0.00    -0.26
 21   2.2257      0.00     0.19       0.00    -0.34
 22   2.2285      0.00     0.26       0.00    -0.37
 23   2.8386      0.00     0.17       0.00     0.55
 24   2.8387      0.00     0.22       0.00     0.59
 25   2.8387      0.00     0.27       0.00     0.53
 26   2.8387      0.00     0.32       0.00     0.47
 27   3.1401      0.00    -0.63       0.00    -0.51
 28   3.1403      0.00    -0.70       0.00    -0.48

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.

143991    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        44.961    44.961    44.961
ecceobj         0.140     0.140     0.140
incobj         19.341    19.341    19.341
qmin           37.807    37.791    37.818
qmax           51.845    51.874    51.879
amean          44.669    44.669    44.668
amin           44.294    44.290    44.288
amax           45.087    45.086    45.078
emean           0.136     0.136     0.136
emin            0.123     0.123     0.122
emax            0.151     0.151     0.151
imean          18.101    18.103    18.102
imin           17.606    17.609    17.604
imax           18.554    18.566    18.562
excite_mean     0.339     0.339     0.339
fracstop        1.000     1.000     1.000
cjmean          2.968     2.968     2.968

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       181.8     181.5     181.5
kozaiamp        179.9     179.9     180.0