Orbit Fit and Astrometric record for 13JU64

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: 13JU64    
# Created Mon Oct 23 01:38:17 2017
# Orbit generated from Bernstein formalism
# Fitting   21 observations of   22
# Arc:   4.10y
# First observation: 2013/04/19
#  Last observation: 2017/05/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000180   0.026493   0.000052  -0.012600   0.027220   0.000000
# Chi-squared of fit:    15.41 DOF:   36 RMS:  0.15
# Min/Max residuals:    -0.64    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.440531E-05  2.632224E-02 -7.342913E-06 -1.251598E-02  2.739938E-02  4.522068E-05
# Covariance matrix:
  2.2170E-13 -1.7219E-13 -2.8530E-14  7.1627E-14  1.4000E-13 -1.4201E-12
 -1.7219E-13  3.8629E-13  7.2004E-14 -1.8402E-13  5.3040E-14  3.6494E-12
 -2.8530E-14  7.2004E-14  1.3174E-13 -8.9932E-14  6.0934E-15  7.9308E-13
  7.1627E-14 -1.8402E-13 -8.9932E-14  1.5598E-13 -1.8962E-14 -2.0253E-12
  1.4000E-13  5.3040E-14  6.0934E-15 -1.8962E-14  4.2775E-13  3.7703E-13
 -1.4201E-12  3.6494E-12  7.9308E-13 -2.0253E-12  3.7703E-13  4.0163E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.667331 -121.726089    0.483068    0.133041   -0.872692  2456402.070528
# Heliocentric elements and errors
Epoch:              2456400.5000  =  2013/04/18
Mean Anomaly:          354.09104 +/-     0.173
Argument of Peri:      167.63072 +/-     0.198
Long of Asc Node:       74.76472 +/-     0.000
Inclination:            26.65788 +/-     0.000
Eccentricity:         0.06808841 +/-    0.0001
Semi-Major Axis:     40.08333497 +/-    0.0045
Time of Perihelion: 2457921.9340 +/-      44.5
Perihelion:          37.35412436 +/-    0.0052
Aphelion:            42.81254558 +/-    0.0057
Period (y)              253.7780 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -19.84725357 +/-    0.0005
Ecliptic Y          -31.18355179 +/-    0.0007
Ecliptic Z            5.49980333 +/-    0.0001
Ecliptic XDOT         0.00212942 +/-    0.0000
Ecliptic YDOT        -0.00154698 +/-    0.0000
Ecliptic ZDOT        -0.00123554 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.37078021 +/-    0.0007
Geocenter to KBO     36.49717040 +/-    0.0009
# Hcoef:  8.80

The following table shows the complete astrometric record for 13JU64. 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 (13JU64) followed by the observatory code and reference code for the source of the astrometry.

2013 04  19.56975  15 51 56.109  -11 18 55.97  23.9r 13JU64    568  C~1XRe      
2013 05  07.44791  15 50 26.362  -11 14 41.33  24.4r 13JU64    568  C~1XRe      
2013 05  07.49211  15 50 26.126  -11 14 40.73  24.6r 13JU64    568  C~1XRe      
2013 05  07.53231  15 50 25.912  -11 14 40.34  24.1r 13JU64    568  C~1XRe      
2013 05  09.49257  15 50 15.368  -11 14 14.81  24.4r 13JU64    568  C~1XRe      
2013 05  10.49969  15 50 09.915  -11 14 01.68  24.0r 13JU64    568  C~1XRe      
2013 06  04.38093  15 47 54.121  -11 09 59.40  24.3r 13JU64    568  C~1XRe      
2013 06  06.38422  15 47 43.581  -11 09 47.74  24.5r 13JU64    568  C~1XRe      
2013 07  02.33668  15 45 43.461  -11 09 26.05  24.6r 13JU64    568  C~1XRe      
2014 03  06.55593  15 59 20.874  -12 28 43.17  24.4r 13JU64    568  C~1XRe      
2014 04  04.53519  15 58 21.270  -12 23 30.71  24.2r 13JU64    568  C~1XRe      
2014 04  04.55383  15 58 21.204  -12 23 30.05  24.3r 13JU64    568  C~1XRe      
2014 04  30.41699  15 56 28.736  -12 17 40.56  25.0r 13JU64    568  C~1XRe      
2014 04  30.46831  15 56 28.516  -12 17 39.80        13JU64    568  C~1XRe      
2014 05  05.47955  15 56 02.534  -12 16 34.74  24.2r 13JU64    568  C~1XRe      
2014 05  06.41163  15 55 57.610  -12 16 22.99  24.3r 13JU64    568  C~1XRe      
2014 05  06.47850  15 55 57.255  -12 16 22.21  24.3r 13JU64    568  C~1XRe      
2014 05  06.55455  15 55 56.840  -12 16 21.22  24.3r 13JU64    568  C~1XRe      
2014 07  01.37151  15 51 09.440  -12 10 43.71  24.4r 13JU64    568  C~1XRe      
2014 07  01.37542  15 51 09.411  -12 10 43.83  24.6r 13JU64    568  C~1XRe      
2017 05  26.33157  16 10 38.95   -15 15 09.4         13JU64    G37  C~2Gia      
2017 05  26.38930  16 10 38.65   -15 15 08.8         13JU64    G37  C~2Gia      

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     0.16       0.00     0.02
  2   0.0489  -1344.13    -0.02     -33.71     0.07
  3   0.0491  -1347.65     0.04     -33.87     0.10
  4   0.0492  -1350.81     0.14     -34.16    -0.03
  5   0.0545  -1507.81     0.01     -42.52    -0.02
  6   0.0573  -1588.99    -0.11     -46.93     0.25
  7   0.1254  -3592.65    -0.18    -241.44     0.04
  8   0.1309  -3746.65     0.18    -263.69    -0.09
  9   0.2020  -5477.61    -0.10    -627.39    -0.21
 10   0.8788   7265.53     0.01   -2723.35     0.04
 11   0.9582   6345.54     0.07   -2598.34     0.12
 12   0.9582   6344.45 (  -0.02)  -2597.89 (   0.52)
 13   1.0290   4658.44    -0.64   -2599.46    -0.27
 14   1.0292   4655.13    -0.00   -2599.39    -0.04
 15   1.0429   4268.93     0.06   -2615.53     0.00
 16   1.0454   4195.87     0.04   -2619.17    -0.04
 17   1.0456   4190.61     0.14   -2619.50    -0.08
 18   1.0458   4184.45     0.07   -2619.81    -0.07
 19   1.1986     -5.56     0.13   -3182.66     0.15
 20   1.1986     -5.95    -0.03   -3182.87    -0.00
 21   4.1006  19011.34    -0.18  -10559.12    -0.09
 22   4.1008  19006.92     0.22  -10559.37     0.14

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.

13JU64    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        39.956    39.970    39.942
ecceobj         0.066     0.066     0.066
incobj         26.658    26.658    26.658
qmin           36.545    36.528    36.615
qmax           44.095    44.218    44.030
amean          40.215    40.241    40.199
amin           39.887    39.898    39.889
amax           40.553    40.589    40.539
emean           0.074     0.075     0.073
emin            0.061     0.062     0.060
emax            0.088     0.090     0.086
imean          24.945    24.934    24.945
imin           24.486    24.473    24.483
imax           25.477    25.479    25.471
excite_mean     0.428     0.428     0.428
fracstop        1.000     1.000     1.000
cjmean          2.840     2.840     2.840

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       187.0     189.1     187.0
kozaiamp        179.9     180.0     180.0