Orbit Fit and Astrometric record for 13JW65

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: 13JW65    
# Created Sun Dec 17 02:37:57 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   19
# Arc:   2.83y
# First observation: 2011/06/07
#  Last observation: 2014/04/04
Preliminary a, adot, b, bdot, g, gdot:
   0.000153   0.036995   0.000010   0.002093   0.030040   0.000000
# Chi-squared of fit:    14.10 DOF:   28 RMS:  0.16
# Min/Max residuals:    -0.40    0.35
# Exact a, adot, b, bdot, g, gdot:
  1.927830E-05  3.749059E-02  9.603318E-07  2.125247E-03  3.065164E-02  4.786350E-03
# Covariance matrix:
  3.4969E-13 -3.3531E-13  2.4376E-15 -1.0617E-14 -1.5357E-13 -2.0410E-12
 -3.3531E-13  1.1036E-12 -1.3098E-14  5.8994E-14  1.3038E-12  1.1679E-11
  2.4376E-15 -1.3098E-14  3.0680E-13 -1.4704E-13 -1.7267E-14 -1.5256E-13
 -1.0617E-14  5.8994E-14 -1.4704E-13  1.0119E-13  8.2174E-14  6.9455E-13
 -1.5357E-13  1.3038E-12 -1.7267E-14  8.2174E-14  2.8005E-12  1.7006E-11
 -2.0410E-12  1.1679E-11 -1.5256E-13  6.9455E-13  1.7006E-11  1.3874E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.800865 -122.497178   -0.321335   -0.080743   -0.960526  2455719.889316
# Heliocentric elements and errors
Epoch:              2455710.5000  =  2011/05/29
Mean Anomaly:           16.35587 +/-     0.031
Argument of Peri:      272.28523 +/-     0.069
Long of Asc Node:      292.90356 +/-     0.004
Inclination:             5.69736 +/-     0.000
Eccentricity:         0.32056511 +/-    0.0001
Semi-Major Axis:     47.52423496 +/-    0.0097
Time of Perihelion: 2450273.7120 +/-      10.1
Perihelion:          32.28962336 +/-    0.0097
Aphelion:            62.75884656 +/-    0.0146
Period (y)              327.6279 +/-      0.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -17.70876986 +/-    0.0010
Ecliptic Y          -28.40543230 +/-    0.0015
Ecliptic Z           -2.73036509 +/-    0.0001
Ecliptic XDOT         0.00258461 +/-    0.0000
Ecliptic YDOT        -0.00216601 +/-    0.0000
Ecliptic ZDOT         0.00015343 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.58457991 +/-    0.0014
Geocenter to KBO     32.62468454 +/-    0.0018
# Hcoef:  6.82

The following table shows the complete astrometric record for 13JW65. 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 (13JW65) followed by the observatory code and reference code for the source of the astrometry.

2011 06  07.38855  15 36 08.307  -24 16 26.70  22.3w 13JW65    F51  C~1w3u      
2011 06  07.40274  15 36 08.204  -24 16 26.50  22.3w 13JW65    F51  C~1w3u      
2011 06  07.41691  15 36 08.143  -24 16 26.19  22.3w 13JW65    F51  C~1w3u      
2011 06  07.43111  15 36 08.069  -24 16 25.77  22.3w 13JW65    F51  C~1w3u      
2012 06  12.34507  15 44 51.390  -24 36 17.31  22.1w 13JW65    F51  C~1w3u      
2012 06  12.35907  15 44 51.342  -24 36 17.18  22.2w 13JW65    F51  C~1w3u      
2012 06  12.37306  15 44 51.266  -24 36 17.06  22.3w 13JW65    F51  C~1w3u      
2012 06  12.38710  15 44 51.152  -24 36 16.34  22.4w 13JW65    F51  C~1w3u      
2013 05  11.41775  15 57 17.051  -25 06 12.84  21.9w 13JW65    F51  C~1w3u      
2013 05  11.43162  15 57 17.005  -25 06 12.64  21.9w 13JW65    F51  C~1w3u      
2013 05  11.44546  15 57 16.927  -25 06 12.62  22.0w 13JW65    F51  C~1w3u      
2013 06  01.36533  15 55 09.012  -24 59 46.12  22.4w 13JW65    F51  C~1w3u      
2013 06  01.38014  15 55 08.911  -24 59 45.95  22.4w 13JW65    F51  C~1w3u      
2013 06  01.39494  15 55 08.832  -24 59 45.49  22.4w 13JW65    F51  C~1w3u      
2013 06  30.33229  15 52 33.063  -24 50 00.33  22.0w 13JW65    F51  C~1w3u      
2013 06  30.34614  15 52 33.010  -24 50 00.07  22.2w 13JW65    F51  C~1w3u      
2013 06  30.36005  15 52 32.953  -24 49 59.68  22.2w 13JW65    F51  C~1w3u      
2014 04  04.59448  16 09 28.394  -25 28 44.95  21.9w 13JW65    F51  C~1w3u      
2014 04  04.61654  16 09 28.368  -25 28 44.54  21.8w 13JW65    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     0.01       0.00     0.03
  2   0.0000     -1.42    -0.24      -0.14    -0.16
  3   0.0001     -2.30     0.04      -0.03    -0.11
  4   0.0001     -3.38     0.13       0.14     0.01
  5   1.0156   7229.99     0.10     460.66     0.17
  6   1.0157   7229.32 (   0.55)    460.64 (   0.09)
  7   1.0157   7228.28 (   0.62)    460.53 (  -0.08)
  8   1.0157   7226.60     0.06     460.89     0.22
  9   1.9275  17569.62    -0.40     817.05    -0.05
 10   1.9276  17568.97     0.13     817.12     0.03
 11   1.9276  17567.92     0.27     816.93    -0.15
 12   1.9849  15775.88    -0.04     850.10     0.09
 13   1.9849  15774.49    -0.15     849.99    -0.06
 14   1.9850  15773.34    -0.02     850.23     0.14
 15   2.0642  13568.47    -0.10     992.95    -0.07
 16   2.0642  13567.70     0.04     993.06    -0.06
 17   2.0643  13566.86     0.11     993.28     0.08
 18   2.8260  27689.12    -0.29    1336.05    -0.28
 19   2.8261  27688.69     0.35    1336.39     0.17

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.

13JW65    quality flag:3

Type:           2:1E      2:1E      2:1E

axisobj        47.309    47.338    47.280
ecceobj         0.318     0.318     0.317
incobj          5.699     5.699     5.699
qmin           31.541    31.555    31.460
qmax           64.824    64.734    65.029
amean          47.797    47.797    47.797
amin           47.239    47.266    47.238
amax           48.461    48.459    48.490
emean           0.320     0.320     0.320
emin            0.302     0.301     0.299
emax            0.339     0.338     0.342
imean           8.145     8.161     8.201
imin            6.987     7.022     6.760
imax            9.232     9.270     9.494
excite_mean     0.350     0.350     0.351
fracstop        1.000     1.000     1.000
cjmean          2.993     2.993     2.992

libcent 0       288.1     288.0     286.7
libamp  0        22.9      22.6      26.5
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       173.0     172.3     163.4
kozaiamp        180.0     180.0     180.0