Orbit Fit and Astrometric record for 437871

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: 437871    
# Created Mon Oct 23 01:36:47 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   29 observations of   29
# Arc:  13.18y
# First observation: 2001/03/26
#  Last observation: 2014/05/30
# Chi-squared of fit:    60.58 DOF:   52 RMS:  0.26
# Min/Max residuals:    -0.51    0.89
# Exact a, adot, b, bdot, g, gdot:
  1.406724E-05  2.492343E-02  6.024433E-06  9.899161E-03  2.593322E-02 -3.902059E-04
# 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
   -1.953665 -161.152639    0.222367   -0.033483   -0.976616  2451994.870063
# Heliocentric elements and errors
Epoch:              2451994.5000  =  2001/03/26
Mean Anomaly:          346.75535 +/-     0.000
Argument of Peri:       10.09330 +/-     0.000
Long of Asc Node:      203.29553 +/-     0.000
Inclination:            21.78159 +/-     0.000
Eccentricity:         0.06945068 +/-    0.0000
Semi-Major Axis:     42.38597876 +/-    0.0000
Time of Perihelion: 2455702.7551 +/-       0.0
Perihelion:          39.44224362 +/-    0.0000
Aphelion:            45.32971391 +/-    0.0000
Period (y)              275.9571 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.46437304 +/-    0.0000
Ecliptic Y          -12.55022110 +/-    0.0000
Ecliptic Z           -1.31431669 +/-    0.0000
Ecliptic XDOT         0.00084692 +/-    0.0000
Ecliptic YDOT        -0.00248549 +/-    0.0000
Ecliptic ZDOT         0.00104607 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.53246228 +/-    0.0000
Geocenter to KBO     38.56061588 +/-    0.0000
# Hcoef:  7.31

The following table shows the complete astrometric record for 437871. 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 (437871) followed by the observatory code and reference code for the source of the astrometry.

2001 03  26.36932  13 06 33.25   -09 11 23.1   24.4R 437871    695  Cd1722      
2001 03  26.44900  13 06 32.88   -09 11 20.4         437871    695  Cd1722      
2001 04  29.34399  13 03 56.53   -08 51 52.1   22.8R 437871    695  Cd1722      
2001 04  29.39061  13 03 56.33   -08 51 50.6         437871    695  Cd1722      
2001 05  29.20910  13 02 11.26   -08 37 10.8   22.9R 437871    695  Cd1722      
2001 05  29.31203  13 02 11.04   -08 37 08.7         437871    695  Cd1722      
2002 04  06.17214  13 11 57.51   -09 06 24.2   21.9R 437871    807  Cf4616      
2002 04  06.30697  13 11 56.85   -09 06 19.7         437871    807  Cf4616      
2002 04  07.19384  13 11 52.68   -09 05 49.5         437871    807  Cf4616      
2002 04  08.05922  13 11 48.58   -09 05 19.2   21.8R 437871    807  Cf4616      
2002 04  09.05013  13 11 43.90   -09 04 44.9         437871    807  Cf4616      
2002 04  09.15254  13 11 43.41   -09 04 41.3         437871    807  Cf4616      
2002 04  10.35428  13 11 37.76   -09 04 00.2   22.2R 437871    695  Cg5748      
2002 04  10.40782  13 11 37.49   -09 03 58.3         437871    695  Cg5748      
2003 04  30.40524  13 16 20.40   -08 53 28.1   23.3R 437871    568  Ch9859      
2003 04  30.46891  13 16 20.09   -08 53 26.0         437871    568  Ch9859      
2003 05  01.32318  13 16 16.37   -08 52 58.2         437871    568  Ch9859      
2005 03  09.38741  13 32 39.40   -09 21 35.9   22.9R 437871    695  Cn0174      
2005 03  09.47849  13 32 39.07   -09 21 33.5         437871    695  Cn0174      
2005 03  10.41115  13 32 35.67   -09 21 08.0         437871    695  Cn0174      
2005 05  09.16897  13 28 09.30   -08 49 05.9   22.2R 437871    807  Cn5308      
2005 05  10.16326  13 28 05.15   -08 48 36.2         437871    807  Cn5308      
2005 05  10.24777  13 28 04.79   -08 48 33.6         437871    807  Cn5308      
2014 04  23.20382  14 25 38.78   -08 39 38.5         437871    W84  C~1TiY      
2014 04  24.22591  14 25 33.83   -08 39 06.7   24.8V 437871    W84  C~1TiY      
2014 04  25.22586  14 25 29.03   -08 38 36.2         437871    W84  C~1TiY      
2014 04  26.19223  14 25 24.36   -08 38 06.6         437871    W84  C~1TiY      
2014 05  30.22184  14 22 48.83   -08 23 01.6   23.2R 437871    695  C~1LJ2      
2014 05  30.35851  14 22 48.30   -08 22 58.7         437871    695  C~1LJ2      

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    -0.17       0.00     0.89
  2   0.0002      0.00     0.29       0.00    -0.07
  3   0.0930      0.00    -0.25       0.00     0.21
  4   0.0931      0.00    -0.20       0.00     0.14
  5   0.1748      0.00    -0.36       0.00     0.55
  6   0.1751      0.00     0.39       0.00     0.16
  7   1.0289      0.00     0.34       0.00     0.09
  8   1.0293      0.00     0.13       0.00    -0.06
  9   1.0317      0.00     0.21       0.00    -0.41
 10   1.0341      0.00    -0.14       0.00     0.01
 11   1.0368      0.00    -0.13       0.00     0.05
 12   1.0371      0.00    -0.12       0.00     0.12
 13   1.0403      0.00     0.42       0.00    -0.17
 14   1.0405      0.00     0.22       0.00    -0.13
 15   2.0946      0.00     0.08       0.00    -0.21
 16   2.0947      0.00    -0.28       0.00    -0.22
 17   2.0971      0.00     0.04       0.00    -0.51
 18   3.9535      0.00    -0.17       0.00     0.25
 19   3.9538      0.00    -0.06       0.00     0.15
 20   3.9563      0.00    -0.07       0.00    -0.04
 21   4.1199      0.00     0.14       0.00     0.12
 22   4.1226      0.00     0.19       0.00    -0.34
 23   4.1229      0.00     0.15       0.00    -0.30
 24  13.0755      0.00     0.43       0.00    -0.20
 25  13.0783      0.00    -0.15       0.00     0.21
 26  13.0811      0.00     0.04       0.00     0.10
 27  13.0837      0.00    -0.18       0.00     0.23
 28  13.1769      0.00    -0.09       0.00    -0.13
 29  13.1772      0.00     0.29       0.00    -0.15

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.

437871    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        42.277    42.276    42.277
ecceobj         0.068     0.068     0.068
incobj         21.802    21.802    21.802
qmin           38.443    38.453    38.445
qmax           46.933    46.925    46.939
amean          42.583    42.583    42.583
amin           42.254    42.253    42.255
amax           42.935    42.932    42.930
emean           0.079     0.079     0.079
emin            0.064     0.064     0.064
emax            0.094     0.094     0.094
imean          22.164    22.164    22.164
imin           21.746    21.749    21.744
imax           22.578    22.580    22.580
excite_mean     0.385     0.385     0.385
fracstop        1.000     1.000     1.000
cjmean          2.903     2.903     2.903

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       173.2     173.2     173.2
kozaiamp        179.9     180.0     180.0