Orbit Fit and Astrometric record for 13VF24

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: 13VF24    
# Created Tue Dec 12 02:38:02 2017
# Orbit generated from Bernstein formalism
# Fitting   27 observations of   29
# Arc:   3.15y
# First observation: 2011/11/25
#  Last observation: 2015/01/19
Preliminary a, adot, b, bdot, g, gdot:
   0.000186   0.053737   0.000096   0.010039   0.039912   0.000000
# Chi-squared of fit:    12.42 DOF:   48 RMS:  0.12
# Min/Max residuals:    -0.27    0.23
# Exact a, adot, b, bdot, g, gdot:
  2.184062E-05  5.395066E-02  4.987710E-06  1.020093E-02  3.906331E-02 -8.410193E-04
# Covariance matrix:
  3.4517E-13 -3.2614E-13  2.0126E-14 -4.4276E-14 -1.3980E-13 -1.3118E-12
 -3.2614E-13  5.8936E-13 -5.0110E-14  1.0976E-13  2.7133E-13  3.1701E-12
  2.0126E-14 -5.0110E-14  2.4980E-13 -1.0793E-13 -1.6139E-14 -3.0668E-13
 -4.4276E-14  1.0976E-13 -1.0793E-13  7.3396E-14  3.6880E-14  6.6962E-13
 -1.3980E-13  2.7133E-13 -1.6139E-14  3.6880E-14  3.3024E-13  1.3247E-12
 -1.3118E-12  3.1701E-12 -3.0668E-13  6.6962E-13  1.3247E-12  1.8982E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -17.395451   56.875592   -0.101340   -0.292788   -0.934629  2455890.944896
# Heliocentric elements and errors
Epoch:              2455890.5000  =  2011/11/25
Mean Anomaly:          359.01590 +/-     0.009
Argument of Peri:      303.90532 +/-     0.018
Long of Asc Node:      113.68352 +/-     0.001
Inclination:            19.84081 +/-     0.000
Eccentricity:         0.33269289 +/-    0.0000
Semi-Major Axis:     39.76315733 +/-    0.0032
Time of Perihelion: 2456140.8562 +/-       2.2
Perihelion:          26.53423757 +/-    0.0028
Aphelion:            52.99207709 +/-    0.0046
Period (y)              250.7434 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           13.80253538 +/-    0.0002
Ecliptic Y           21.33577375 +/-    0.0003
Ecliptic Z           -7.65325056 +/-    0.0001
Ecliptic XDOT        -0.00308463 +/-    0.0000
Ecliptic YDOT         0.00220313 +/-    0.0000
Ecliptic ZDOT         0.00069996 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   26.53860337 +/-    0.0003
Geocenter to KBO     25.59946750 +/-    0.0004
# Hcoef:  7.94

The following table shows the complete astrometric record for 13VF24. 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 (13VF24) followed by the observatory code and reference code for the source of the astrometry.

2011 11  25.44413  03 54 08.646  +02 29 56.33  22.2w 13VF24    F51  C~1vX5      
2011 11  25.46184  03 54 08.518  +02 29 56.30  22.5w 13VF24    F51  C~1vX5      
2011 11  25.47649  03 54 08.400  +02 29 56.04  22.2w 13VF24    F51  C~1vX5      
2011 11  25.49104  03 54 08.297  +02 29 55.77  22.2w 13VF24    F51  C~1vX5      
2012 11  12.49088  04 07 13.293  +03 47 57.43  22.2w 13VF24    F51  C~1vX5      
2012 11  12.50383  04 07 13.240  +03 47 57.58  22.1w 13VF24    F51  C~1vX5      
2012 11  12.51677  04 07 13.132  +03 47 56.96  22.4w 13VF24    F51  C~1vX5      
2012 11  12.52972  04 07 13.038  +03 47 56.54  22.0w 13VF24    F51  C~1vX5      
2013 11  06.41581  04 19 34.640  +05 03 52.64  22.3w 13VF24    F51  C~1vX5      
2013 11  06.42955  04 19 34.546  +05 03 52.57  21.9w 13VF24    F51  C~1vX5      
2013 11  06.44327  04 19 34.485  +05 03 52.04  22.1w 13VF24    F51  C~1vX5      
2013 11  28.40523  04 16 58.409  +04 57 24.13  22.2w 13VF24    F51  C~1vX5      
2013 11  28.41824  04 16 58.312  +04 57 23.92  22.4w 13VF24    F51  C~1vX5      
2013 11  28.43126  04 16 58.224  +04 57 23.79  22.3w 13VF24    F51  C~1vX5      
2013 11  28.44429  04 16 58.125  +04 57 23.72  22.4w 13VF24    F51  C~1vX5      
2014 01  21.24347  04 11 40.032  +05 05 56.01  22.5w 13VF24    F51  C~1vX5      
2014 01  21.25634  04 11 39.981  +05 05 56.44  22.6w 13VF24    F51  C~1vX5      
2014 01  21.26930  04 11 39.932  +05 05 56.94  22.3w 13VF24    F51  C~1vX5      
2014 01  21.28236  04 11 39.896  +05 05 57.23  22.0w 13VF24    F51  C~1vX5      
2014 10  02.55033  04 33 59.504  +06 32 06.17  22.4w 13VF24    F51  C~1vX5      
2014 10  02.56504  04 33 59.473  +06 32 05.83  22.1w 13VF24    F51  C~1vX5      
2014 10  02.57983  04 33 59.440  +06 32 05.78  22.4w 13VF24    F51  C~1vX5      
2015 01  09.27222  04 24 01.173  +06 13 01.70  22.4w 13VF24    F51  C~1vX5      
2015 01  09.28532  04 24 01.096  +06 13 01.99  22.5w 13VF24    F51  C~1vX5      
2015 01  09.29844  04 24 01.019  +06 13 02.21  22.4w 13VF24    F51  C~1vX5      
2015 01  19.22406  04 23 16.045  +06 16 49.15  22.4w 13VF24    F51  C~1vX5      
2015 01  19.23615  04 23 15.998  +06 16 49.42  22.1w 13VF24    F51  C~1vX5      
2015 01  19.24824  04 23 15.957  +06 16 49.76  22.5w 13VF24    F51  C~1vX5      
2015 01  19.26035  04 23 15.900  +06 16 50.16  22.4w 13VF24    F51  C~1vX5      

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    -0.00       0.00    -0.18
  2   0.0000     -1.88     0.09       0.39     0.02
  3   0.0001     -3.66    -0.07       0.52    -0.01
  4   0.0001     -5.23    -0.02       0.59    -0.09
  5   0.9666  12501.36    -0.23    2032.85     0.22
  6   0.9666  12500.62 (   0.45)   2033.17 (   0.51)
  7   0.9667  12498.90     0.16    2032.91     0.23
  8   0.9667  12497.43     0.11    2032.80     0.09
  9   1.9493  24403.43    -0.27    4144.67    -0.21
 10   1.9493  24402.02    -0.23    4144.90     0.04
 11   1.9493  24401.01     0.19    4144.57    -0.26
 12   2.0095  22009.18    -0.04    4255.12    -0.02
 13   2.0095  22007.70    -0.05    4255.22    -0.09
 14   2.0095  22006.37     0.09    4255.37    -0.11
 15   2.0096  22004.90     0.08    4255.62    -0.03
 16   2.1569  17427.17     0.12    5766.13     0.02
 17   2.1569  17426.51     0.02    5766.71     0.09
 18   2.1569  17425.90    -0.04    5767.36     0.22
 19   2.1570  17425.43     0.06    5767.76     0.09
 20   2.8531  38460.30    -0.03    6705.30     0.03
 21   2.8532  38459.76     0.14    6705.05     0.09
 22   2.8532  38459.25 (   0.33)   6705.10 (   0.45)
 23   3.1234  29250.43     0.14    7408.30    -0.14
 24   3.1235  29249.34     0.02    7408.83    -0.08
 25   3.1235  29248.24    -0.11    7409.28    -0.09
 26   3.1507  28628.04    -0.08    7773.17     0.06
 27   3.1507  28627.40    -0.06    7773.58     0.00
 28   3.1507  28626.87     0.06    7774.05     0.00
 29   3.1508  28626.11    -0.04    7774.62     0.10

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.

13VF24    quality flag:3

Type:           3:2E      3:2E      3:2E
Type:          6:4II     6:4II     6:4II

axisobj        39.886    39.895    39.876
ecceobj         0.334     0.334     0.334
incobj         19.842    19.842    19.842
qmin           26.013    26.034    26.009
qmax           53.419    53.429    53.436
amean          39.454    39.454    39.454
amin           39.117    39.119    39.125
amax           39.886    39.895    39.876
emean           0.271     0.272     0.271
emin            0.160     0.160     0.160
emax            0.340     0.339     0.340
imean          20.791    20.766    20.796
imin           17.660    17.626    17.670
imax           24.426    24.427    24.424
excite_mean     0.450     0.450     0.450
fracstop        1.000     1.000     1.000
cjmean          2.819     2.819     2.819

libcent 0       179.5     179.4     179.9
libamp  0        19.5      23.8      18.0
libcent 1       181.0     180.8     180.2
libamp  1       138.3     149.0     134.0
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       278.0     277.5     278.1
kozaiamp         65.8      66.5      65.6