Orbit Fit and Astrometric record for 13JQ64

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: 13JQ64    
# Created Mon Oct 23 01:38:17 2017
# Orbit generated from Bernstein formalism
# Fitting   26 observations of   26
# Arc:   3.97y
# First observation: 2013/04/10
#  Last observation: 2017/03/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000009   0.009001  -0.000138  -0.006210   0.017235   0.000000
# Chi-squared of fit:     4.85 DOF:   46 RMS:  0.08
# Min/Max residuals:    -0.16    0.23
# Exact a, adot, b, bdot, g, gdot:
  8.807834E-06  9.311767E-03 -5.819693E-06 -6.448837E-03  1.767790E-02  7.127068E-03
# Covariance matrix:
  2.1005E-13 -7.3932E-14 -7.0200E-15  8.8303E-15  1.2730E-13 -2.5178E-13
 -7.3932E-14  2.6508E-13  8.0237E-14 -1.6698E-13  2.7591E-13  6.8699E-12
 -7.0200E-15  8.0237E-14  1.5468E-13 -1.1544E-13  1.0004E-13  2.4941E-12
  8.8303E-15 -1.6698E-13 -1.1544E-13  1.7066E-13 -2.1874E-13 -5.2144E-12
  1.2730E-13  2.7591E-13  1.0004E-13 -2.1874E-13  6.2032E-13  9.2025E-12
 -2.5178E-13  6.8699E-12  2.4941E-12 -5.2144E-12  9.2025E-12  2.1499E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.567012 -117.134645    0.672200    0.085238   -0.740284  2456393.098038
# Heliocentric elements and errors
Epoch:              2456390.5000  =  2013/04/08
Mean Anomaly:           78.37346 +/-     0.153
Argument of Peri:       31.50301 +/-     0.059
Long of Asc Node:       71.53112 +/-     0.000
Inclination:            34.98599 +/-     0.001
Eccentricity:         0.54647462 +/-    0.0005
Semi-Major Axis:     48.97818316 +/-    0.0382
Time of Perihelion: 2429134.0719 +/-      42.8
Perihelion:          22.21284891 +/-    0.0302
Aphelion:            75.74351740 +/-    0.0640
Period (y)              342.7774 +/-      0.40
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.56733537 +/-    0.0012
Ecliptic Y          -50.36580203 +/-    0.0022
Ecliptic Z            6.46910163 +/-    0.0003
Ecliptic XDOT         0.00072491 +/-    0.0000
Ecliptic YDOT        -0.00173492 +/-    0.0000
Ecliptic ZDOT        -0.00086583 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   57.30956813 +/-    0.0020
Geocenter to KBO     56.56781688 +/-    0.0025
# Hcoef:  6.31

The following table shows the complete astrometric record for 13JQ64. 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 (13JQ64) followed by the observatory code and reference code for the source of the astrometry.

2013 04  10.59726  16 08 29.954  -14 17 06.15  23.6r 13JQ64    568  C~1XRd      
2013 04  19.46815  16 08 03.957  -14 15 46.57  24.0r 13JQ64    568  C~1XRd      
2013 04  19.52102  16 08 03.791  -14 15 45.97  24.0r 13JQ64    568  C~1XRd      
2013 05  08.45533  16 06 58.227  -14 12 55.72  23.7r 13JQ64    568  C~1XRd      
2013 05  08.49936  16 06 58.055  -14 12 55.36  23.8r 13JQ64    568  C~1XRd      
2013 05  08.54316  16 06 57.893  -14 12 54.95  23.7r 13JQ64    568  C~1XRd      
2013 05  10.55580  16 06 50.350  -14 12 37.70  23.5r 13JQ64    568  C~1XRd      
2014 05  01.44147  16 09 17.021  -14 41 40.23  24.0r 13JQ64    568  C~1XRd      
2014 05  01.49260  16 09 16.849  -14 41 39.67  24.2r 13JQ64    568  C~1XRd      
2014 05  01.55310  16 09 16.620  -14 41 39.27  23.8r 13JQ64    568  C~1XRd      
2014 05  04.43890  16 09 06.340  -14 41 14.36  23.9r 13JQ64    568  C~1XRd      
2014 05  04.48938  16 09 06.154  -14 41 13.91        13JQ64    568  C~1XRd      
2014 05  04.54185  16 09 05.961  -14 41 13.43  24.0r 13JQ64    568  C~1XRd      
2014 05  22.51802  16 07 58.236  -14 38 48.66  23.7r 13JQ64    568  C~1XRd      
2014 05  25.47676  16 07 46.784  -14 38 27.42  23.6r 13JQ64    568  C~1XRd      
2014 06  21.43608  16 06 06.554  -14 36 08.91  23.6r 13JQ64    568  C~1XRd      
2014 06  22.40874  16 06 03.234  -14 36 05.98  23.5r 13JQ64    568  C~1XRd      
2014 06  30.43105  16 05 37.189  -14 35 50.16  23.8r 13JQ64    568  C~1XRd      
2014 07  01.39887  16 05 34.212  -14 35 49.08  24.0r 13JQ64    568  C~1XRe      
2014 07  18.38112  16 04 49.249  -14 36 02.80  23.7r 13JQ64    568  C~1XRe      
2014 07  26.29286  16 04 33.596  -14 36 30.79  23.8r 13JQ64    568  C~1XRe      
2015 03  22.57427  16 12 53.467  -15 14 03.76  23.8r 13JQ64    568  C~1XRe      
2016 06  03.43279  16 10 54.027  -15 31 44.88  24.0w 13JQ64    568  C~2LSW      
2017 01  31.66055  16 16 16.838  -16 07 39.36  22.8w 13JQ64    568  C~2LSW      
2017 01  31.66166  16 16 16.844  -16 07 39.56  24.4w 13JQ64    568  C~2LSW      
2017 03  30.60077  16 16 17.307  -16 05 57.78  24.2w 13JQ64    568  C~2LSW      

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    -0.10       0.00     0.01
  2   0.0243   -386.13    -0.02       7.33    -0.02
  3   0.0244   -388.62     0.00       7.47     0.11
  4   0.0763  -1356.89    -0.01      -4.77    -0.08
  5   0.0764  -1359.41    -0.08      -4.89    -0.11
  6   0.0765  -1361.80    -0.03      -4.93    -0.08
  7   0.0820  -1472.78    -0.02      -8.71    -0.15
  8   1.0564    946.88     0.09   -1320.48     0.03
  9   1.0565    944.32     0.23   -1320.40     0.18
 10   1.0567    940.98     0.08   -1320.63     0.02
 11   1.0646    789.79     0.06   -1323.96     0.03
 12   1.0647    787.05     0.04   -1324.02     0.04
 13   1.0649    784.21     0.03   -1324.08     0.07
 14   1.1141   -208.31    -0.01   -1365.81     0.08
 15   1.1222   -375.55    -0.08   -1376.17     0.06
 16   1.1960  -1830.37     0.05   -1514.95    -0.10
 17   1.1987  -1878.25    -0.08   -1521.22     0.04
 18   1.2206  -2252.47     0.07   -1577.56    -0.00
 19   1.2233  -2295.11    -0.02   -1584.73     0.01
 20   1.2698  -2933.31     0.01   -1722.74     0.04
 21   1.2914  -3151.03    -0.03   -1793.70    -0.05
 22   1.9465   4388.96    -0.11   -2652.78    -0.04
 23   3.1481   2885.07    -0.03   -4013.20    -0.03
 24   3.8113   7862.57    -0.00   -5288.84     0.02
 25   3.8113   7862.69     0.09   -5289.02    -0.16
 26   3.9699   7851.03    -0.11   -5187.54     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.

13JQ64    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        48.771    48.877    48.666
ecceobj         0.546     0.547     0.544
incobj         34.996    34.995    34.998
qmin           22.164    22.053    22.101
qmax           77.195    77.354    76.960
amean          48.934    49.250    48.919
amin           48.249    48.159    48.338
amax           50.255    50.286    49.804
emean           0.510     0.513     0.514
emin            0.466     0.463     0.468
emax            0.551     0.550     0.549
imean          35.426    35.409    35.153
imin           33.507    33.495    33.478
imax           37.477    37.680    37.223
excite_mean     0.772     0.775     0.772
fracstop        0.090     0.087     0.084
cjmean          2.405     2.402     2.404

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        43.2      41.6      43.4
kozaiamp          9.5       8.1      10.2