Orbit Fit and Astrometric record for 13PX74

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: 13PX74    
# Created Mon Oct 23 01:38:18 2017
# Orbit generated from Bernstein formalism
# Fitting   19 observations of   19
# Arc:   2.08y
# First observation: 2011/08/24
#  Last observation: 2013/09/22
Preliminary a, adot, b, bdot, g, gdot:
   0.000004   0.019226  -0.000000   0.001209   0.022355   0.000000
# Chi-squared of fit:     5.66 DOF:   32 RMS:  0.10
# Min/Max residuals:    -0.22    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.376470E-05  1.925000E-02  4.808217E-07  1.211209E-03  2.245984E-02  6.502089E-04
# Covariance matrix:
  3.6608E-13 -5.0464E-13  4.1507E-15 -2.1660E-14 -3.5627E-13 -8.3722E-12
 -5.0464E-13  2.0679E-12 -2.2731E-14  1.2521E-13  1.1661E-12  4.8146E-11
  4.1507E-15 -2.2731E-14  2.9551E-13 -1.6119E-13 -1.5592E-14 -5.5916E-13
 -2.1660E-14  1.2521E-13 -1.6119E-13  1.2520E-13  6.7570E-14  3.0970E-12
 -3.5627E-13  1.1661E-12 -1.5592E-14  6.7570E-14  2.9828E-12  2.6641E-11
 -8.3722E-12  4.8146E-11 -5.5916E-13  3.0970E-12  2.6641E-11  1.1903E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -7.132370  -19.478950    0.173181   -0.123365   -0.985557  2455797.936856
# Heliocentric elements and errors
Epoch:              2455790.5000  =  2011/08/17
Mean Anomaly:          167.60809 +/-     0.580
Argument of Peri:      126.11868 +/-     0.581
Long of Asc Node:       43.25091 +/-     0.007
Inclination:             7.82359 +/-     0.001
Eccentricity:         0.14856168 +/-    0.0003
Semi-Major Axis:     39.71679867 +/-    0.0092
Time of Perihelion: 2413225.5368 +/-     146.7
Perihelion:          33.81640427 +/-    0.0130
Aphelion:            45.61719307 +/-    0.0148
Period (y)              250.3050 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.53332077 +/-    0.0032
Ecliptic Y          -15.22531005 +/-    0.0011
Ecliptic Z           -5.52812919 +/-    0.0004
Ecliptic XDOT         0.00087081 +/-    0.0000
Ecliptic YDOT         0.00218536 +/-    0.0000
Ecliptic ZDOT         0.00013672 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.51322505 +/-    0.0030
Geocenter to KBO     44.52392381 +/-    0.0034
# Hcoef:  5.83

The following table shows the complete astrometric record for 13PX74. 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 (13PX74) followed by the observatory code and reference code for the source of the astrometry.

2011 08  24.43609  22 59 11.637  -14 12 48.02  22.5w 13PX74    F51  C~1w3u      
2011 08  24.45009  22 59 11.578  -14 12 48.60  23.0w 13PX74    F51  C~1w3u      
2011 08  24.46405  22 59 11.520  -14 12 48.79  22.7w 13PX74    F51  C~1w3u      
2011 08  24.47804  22 59 11.471  -14 12 49.12  22.9w 13PX74    F51  C~1w3u      
2012 08  14.48416  23 03 53.936  -13 39 06.34  22.1w 13PX74    F51  C~1w3u      
2012 08  14.49920  23 03 53.862  -13 39 06.62  22.1w 13PX74    F51  C~1w3u      
2012 08  14.51426  23 03 53.810  -13 39 07.37  22.4w 13PX74    F51  C~1w3u      
2012 08  14.52929  23 03 53.760  -13 39 07.54  22.2w 13PX74    F51  C~1w3u      
2013 08  09.44903  23 08 16.731  -13 07 00.15  22.2w 13PX74    F51  C~1w3u      
2013 08  09.46327  23 08 16.683  -13 07 00.62  22.5w 13PX74    F51  C~1w3u      
2013 08  09.47752  23 08 16.619  -13 07 01.00  22.2w 13PX74    F51  C~1w3u      
2013 08  09.49176  23 08 16.566  -13 07 01.32  22.3w 13PX74    F51  C~1w3u      
2013 08  26.47023  23 07 09.029  -13 14 37.82  21.9r 13PX74    F51  C~1w3u      
2013 08  26.50878  23 07 08.854  -13 14 38.80  21.7i 13PX74    F51  C~1w3u      
2013 09  01.42444  23 06 43.693  -13 17 16.41  22.6w 13PX74    F51  C~1w3u      
2013 09  01.43865  23 06 43.638  -13 17 16.75  22.2w 13PX74    F51  C~1w3u      
2013 09  01.45211  23 06 43.567  -13 17 16.89  22.4w 13PX74    F51  C~1w3u      
2013 09  01.46556  23 06 43.516  -13 17 17.31  22.4w 13PX74    F51  C~1w3u      
2013 09  22.41050  23 05 13.674  -13 25 46.43  21.6i 13PX74    F51  C~1w3u      

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    -0.04       0.00     0.08
  2   0.0000     -1.02    -0.11      -0.20    -0.12
  3   0.0001     -1.87    -0.01      -0.05     0.04
  4   0.0001     -2.65     0.16      -0.08     0.01
  5   0.9748   4573.41     0.05     263.02    -0.01
  6   0.9748   4572.30    -0.08     263.18     0.19
  7   0.9749   4571.31    -0.10     262.79    -0.18
  8   0.9749   4570.57     0.13     262.92    -0.02
  9   1.9603   8861.53     0.05     525.30     0.09
 10   1.9604   8860.69     0.08     525.14    -0.03
 11   1.9604   8859.68    -0.06     525.16     0.03
 12   1.9605   8858.84    -0.03     525.18     0.08
 13   2.0069   7770.60     0.04     495.28     0.07
 14   2.0070   7767.86    -0.07     495.39     0.17
 15   2.0232   7367.59    -0.08     495.35    -0.21
 16   2.0233   7366.72     0.03     495.35    -0.22
 17   2.0233   7365.71    -0.05     495.63     0.04
 18   2.0234   7364.86     0.03     495.54    -0.06
 19   2.0807   5957.65     0.05     543.17     0.06

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.

13PX74    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.693    39.721    39.665
ecceobj         0.148     0.148     0.149
incobj          7.825     7.825     7.825
qmin           32.915    32.878    32.837
qmax           46.628    46.686    46.597
amean          39.458    39.458    39.457
amin           38.994    38.960    39.023
amax           39.969    39.992    39.944
emean           0.149     0.149     0.149
emin            0.130     0.130     0.130
emax            0.168     0.168     0.167
imean           6.823     6.534     7.111
imin            6.148     5.824     6.342
imax            7.563     7.335     7.843
excite_mean     0.191     0.187     0.194
fracstop        1.000     1.000     1.000
cjmean          3.011     3.012     3.009

libcent 0       180.5     180.6     180.2
libamp  0        98.6     111.8      87.3
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       174.3     180.1     181.8
kozaiamp        179.9     180.0     180.0