Orbit Fit and Astrometric record for 11UW412

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: 11UW412   
# Created Sun Dec 17 02:37:43 2017
# Orbit generated from Bernstein formalism
# Fitting   18 observations of   18
# Arc:   1.42y
# First observation: 2011/09/05
#  Last observation: 2013/02/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000218   0.031975  -0.000016  -0.006769   0.026364   0.000000
# Chi-squared of fit:     7.11 DOF:   30 RMS:  0.11
# Min/Max residuals:    -0.29    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.945986E-05  3.188526E-02 -5.181084E-06 -6.834894E-03  2.648576E-02  5.058792E-03
# Covariance matrix:
  1.0395E-12  1.2702E-12  5.1309E-14 -6.1543E-13  1.5925E-12  7.2495E-11
  1.2702E-12  3.7436E-12  1.3955E-13 -1.4465E-12  2.9884E-12  1.6852E-10
  5.1309E-14  1.3955E-13  1.9506E-13 -2.4829E-13  1.1060E-13  6.8772E-12
 -6.1543E-13 -1.4465E-12 -2.4829E-13  9.4488E-13 -1.2625E-12 -7.1440E-11
  1.5925E-12  2.9884E-12  1.1060E-13 -1.2625E-12  3.0540E-12  1.4819E-10
  7.2495E-11  1.6852E-10  6.8772E-12 -7.1440E-11  1.4819E-10  8.3245E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    5.185419   31.548870    0.759925    0.059426   -0.654997  2455810.098236
# Heliocentric elements and errors
Epoch:              2455810.5000  =  2011/09/06
Mean Anomaly:            5.96723 +/-     0.103
Argument of Peri:      134.24912 +/-     0.411
Long of Asc Node:      233.21486 +/-     0.002
Inclination:            12.95475 +/-     0.001
Eccentricity:         0.52888817 +/-    0.0016
Semi-Major Axis:     79.42512926 +/-    0.1906
Time of Perihelion: 2451524.9601 +/-      72.3
Perihelion:          37.41811827 +/-    0.1582
Aphelion:           121.43214024 +/-    0.3192
Period (y)              707.8563 +/-      2.55
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.00528296 +/-    0.0021
Ecliptic Y           19.37202278 +/-    0.0013
Ecliptic Z            3.41218094 +/-    0.0002
Ecliptic XDOT        -0.00122953 +/-    0.0000
Ecliptic YDOT         0.00312010 +/-    0.0000
Ecliptic ZDOT        -0.00065631 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.42221947 +/-    0.0019
Geocenter to KBO     37.75614070 +/-    0.0025
# Hcoef:  9.06

The following table shows the complete astrometric record for 11UW412. 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 (11UW412) followed by the observatory code and reference code for the source of the astrometry.

2011 09  05.59747  01 50 04.156  +16 52 11.03  24.3r 11UW412   568  C~1CKy      
2011 10  25.34656  01 46 31.946  +16 32 18.52  25.2r 11UW412   568  C~1CKy      
2011 10  25.39635  01 46 31.686  +16 32 17.13  24.8r 11UW412   568  C~1CKy      
2011 10  25.40523  01 46 31.661  +16 32 16.83  24.4r 11UW412   568  C~1CKy      
2011 10  26.29551  01 46 27.306  +16 31 48.77  24.5r 11UW412   568  C~1CKy      
2011 10  26.30517  01 46 27.252  +16 31 48.52  24.7r 11UW412   568  C~1CKy      
2011 10  26.34841  01 46 27.034  +16 31 47.04  25.0r 11UW412   568  C~1CKy      
2011 10  26.39151  01 46 26.823  +16 31 45.61  24.4r 11UW412   568  C~1CKy      
2011 11  24.25792  01 44 16.706  +16 16 31.20        11UW412   568  C~1CKy      
2011 11  26.47841  01 44 08.250  +16 15 24.06  25.1r 11UW412   568  C~1CKy      
2012 08  17.57288  01 58 23.075  +17 10 50.56  24.7r 11UW412   568  C~1CKy      
2012 08  24.53062  01 58 12.696  +17 10 17.90  25.4r 11UW412   568  C~1CKy      
2012 10  17.37819  01 54 53.513  +16 52 57.21  24.9r 11UW412   568  C~1CKy      
2012 10  20.47322  01 54 38.352  +16 51 25.71  24.1r 11UW412   568  C~1CKy      
2012 10  21.33604  01 54 34.136  +16 50 59.92  24.7r 11UW412   568  C~1CKy      
2012 10  21.36172  01 54 34.011  +16 50 59.22  24.9r 11UW412   568  C~1CKy      
2012 10  21.38781  01 54 33.873  +16 50 58.22        11UW412   568  C~1CKy      
2013 02  06.27606  01 51 05.074  +16 15 07.07  24.6r 11UW412   568  C~1CKy      

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    -0.09       0.00     0.23
  2   0.1362  -3273.90     0.02     -27.93    -0.11
  3   0.1363  -3277.89    -0.07     -27.89     0.11
  4   0.1364  -3278.33     0.18     -28.04    -0.01
  5   0.1388  -3346.87     0.10     -31.79    -0.07
  6   0.1388  -3347.68     0.04     -31.74     0.00
  7   0.1389  -3351.14    -0.04     -32.00    -0.10
  8   0.1391  -3354.49    -0.02     -32.25    -0.19
  9   0.2181  -5431.37     0.05    -212.00     0.18
 10   0.2242  -5569.25    -0.17    -230.66    -0.04
 11   0.9500   7099.05    -0.01   -1450.87     0.09
 12   0.9690   6947.98     0.13   -1430.28    -0.29
 13   1.1164   3905.35    -0.01   -1416.34     0.14
 14   1.1249   3669.39    -0.11   -1426.21     0.06
 15   1.1273   3603.65    -0.02   -1429.26     0.05
 16   1.1273   3601.72     0.05   -1429.29     0.10
 17   1.1274   3599.52    -0.13   -1429.54    -0.07
 18   1.4228     32.80     0.10   -2390.10    -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.

11UW412    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        79.766    80.401    79.169
ecceobj         0.531     0.536     0.526
incobj         12.951    12.951    12.952
qmin           36.324    36.520    36.560
qmax          123.117   124.278   120.861
amean          78.423    79.000    77.456
amin           77.072    77.840    76.233
amax           80.196    80.771    79.169
emean           0.521     0.528     0.514
emin            0.507     0.518     0.500
emax            0.537     0.539     0.528
imean          14.254    13.963    14.135
imin           13.382    13.755    13.416
imax           15.125    14.120    14.872
excite_mean     0.576     0.580     0.569
fracstop        1.000     1.000     1.000
cjmean          3.053     3.051     3.056

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       180.0     237.5     176.8
kozaiamp        180.0     102.9     180.0