Orbit Fit and Astrometric record for 13AS183

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: 13AS183   
# Created Sat Oct 21 01:38:11 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:   2.03y
# First observation: 2012/01/15
#  Last observation: 2014/01/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000114   0.028942   0.000039   0.011485   0.026679   0.000000
# Chi-squared of fit:    15.48 DOF:   34 RMS:  0.16
# Min/Max residuals:    -0.32    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.732493E-05  2.927274E-02  6.371325E-06  1.163693E-02  2.682433E-02  5.590293E-03
# Covariance matrix:
  6.5613E-13 -7.2220E-13  7.6420E-14 -1.7459E-13 -3.5346E-14 -6.5674E-12
 -7.2220E-13  1.5690E-12 -2.5101E-13  5.7180E-13  8.3247E-13  2.1520E-11
  7.6420E-14 -2.5101E-13  4.7078E-13 -3.9771E-13 -1.7102E-13 -4.0900E-12
 -1.7459E-13  5.7180E-13 -3.9771E-13  4.8730E-13  3.8828E-13  9.3145E-12
 -3.5346E-14  8.3247E-13 -1.7102E-13  3.8828E-13  1.1270E-12  1.4621E-11
 -6.5674E-12  2.1520E-11 -4.0900E-12  9.3145E-12  1.4621E-11  3.5057E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.751446  131.533962    0.282700   -0.028782   -0.941787  2455942.064546
# Heliocentric elements and errors
Epoch:              2455940.5000  =  2012/01/14
Mean Anomaly:           13.55591 +/-     0.031
Argument of Peri:      321.08206 +/-     0.091
Long of Asc Node:      135.40348 +/-     0.000
Inclination:            21.69857 +/-     0.001
Eccentricity:         0.40992721 +/-    0.0005
Semi-Major Axis:     61.50009634 +/-    0.0287
Time of Perihelion: 2449307.0687 +/-      14.5
Perihelion:          36.28953354 +/-    0.0328
Aphelion:            86.71065914 +/-    0.0492
Period (y)              482.3051 +/-      0.34
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -25.11764819 +/-    0.0010
Ecliptic Y           28.78681694 +/-    0.0011
Ecliptic Z           -1.13918032 +/-    0.0000
Ecliptic XDOT        -0.00264314 +/-    0.0000
Ecliptic YDOT        -0.00152245 +/-    0.0000
Ecliptic ZDOT         0.00116983 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.22139208 +/-    0.0011
Geocenter to KBO     37.27958920 +/-    0.0015
# Hcoef:  6.46

The following table shows the complete astrometric record for 13AS183. 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 (13AS183) followed by the observatory code and reference code for the source of the astrometry.

2012 01  15.56378  08 53 57.714  +15 38 21.48  22.3i 13AS183   F51  C~1w3t      
2012 02  22.43319  08 50 45.256  +15 55 48.64  22.6w 13AS183   F51  C~1w3t      
2013 01  10.53040  09 01 43.858  +15 46 50.14  22.7w 13AS183   F51  C~1w3t      
2013 01  10.54427  09 01 43.765  +15 46 50.87  22.5w 13AS183   F51  C~1w3t      
2013 01  10.55813  09 01 43.700  +15 46 50.85  22.4w 13AS183   F51  C~1w3t      
2013 01  10.57198  09 01 43.629  +15 46 51.09  22.5w 13AS183   F51  C~1w3t      
2013 02  03.34088  08 59 44.292  +15 57 50.71  22.2w 13AS183   F51  C~1w3t      
2013 02  03.35550  08 59 44.211  +15 57 51.22  22.5w 13AS183   F51  C~1w3t      
2013 02  03.37016  08 59 44.138  +15 57 51.62  22.1w 13AS183   F51  C~1w3t      
2013 02  03.38481  08 59 44.072  +15 57 51.96  22.2w 13AS183   F51  C~1w3t      
2013 03  03.25695  08 57 28.724  +16 10 41.76  22.2w 13AS183   F51  C~1w3t      
2013 03  03.27126  08 57 28.646  +16 10 42.01  22.6w 13AS183   F51  C~1w3t      
2013 03  03.28565  08 57 28.615  +16 10 42.73  22.6w 13AS183   F51  C~1w3t      
2013 03  03.30000  08 57 28.533  +16 10 43.03  22.5w 13AS183   F51  C~1w3t      
2013 05  30.27950  08 56 51.856  +16 24 53.75  22.1w 13AS183   F51  C~1w3t      
2014 01  05.45942  09 09 28.624  +15 53 47.05  22.4w 13AS183   F51  C~1w3t      
2014 01  05.47460  09 09 28.559  +15 53 47.12  22.4w 13AS183   F51  C~1w3t      
2014 01  24.38580  09 07 59.491  +16 02 21.15  21.8w 13AS183   F51  C~1w3t      
2014 01  24.39898  09 07 59.406  +16 02 21.74  21.7w 13AS183   F51  C~1w3t      
2014 01  24.41219  09 07 59.355  +16 02 22.29  21.7w 13AS183   F51  C~1w3t      

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     0.10
  2   0.1037  -2958.31     0.04     251.88    -0.14
  3   0.9883   6325.74     0.31    2362.60    -0.01
  4   0.9883   6324.24    -0.16    2362.92     0.24
  5   0.9883   6323.35    -0.04    2362.64    -0.12
  6   0.9884   6322.29    -0.08    2362.58    -0.25
  7   1.0535   4483.04     0.01    2510.44    -0.02
  8   1.0535   4481.78    -0.07    2510.60     0.05
  9   1.0535   4480.65    -0.01    2510.69     0.04
 10   1.0536   4479.64     0.17    2510.75     0.01
 11   1.1299   2390.68    -0.07    2705.06     0.03
 12   1.1299   2389.53    -0.26    2704.99    -0.15
 13   1.1300   2388.90     0.09    2705.56     0.32
 14   1.1300   2387.68    -0.16    2705.52     0.17
 15   1.3709   1644.13     0.28    3376.35    -0.32
 16   1.9737  12646.15     0.03    4693.46     0.19
 17   1.9737  12645.23     0.14    4693.25    -0.11
 18   2.0255  11261.88     0.08    4810.97    -0.18
 19   2.0256  11260.53    -0.23    4811.18    -0.05
 20   2.0256  11259.66    -0.04    4811.49     0.18

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.

13AS183    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        61.689    61.779    61.601
ecceobj         0.412     0.413     0.410
incobj         21.704    21.704    21.704
qmin           35.243    35.245    35.257
qmax           89.175    88.630    88.410
amean          61.468    61.361    61.222
amin           60.560    60.644    60.480
amax           62.497    62.355    62.171
emean           0.409     0.408     0.406
emin            0.393     0.393     0.389
emax            0.427     0.425     0.423
imean          20.340    20.407    20.329
imin           19.657    19.675    19.680
imax           21.179    21.114    21.191
excite_mean     0.537     0.536     0.534
fracstop        1.000     1.000     1.000
cjmean          2.935     2.935     2.936

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       160.9     162.0     161.1
kozaiamp        180.0     179.9     180.0