Orbit Fit and Astrometric record for 11UN412

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: 11UN412   
# Created Wed Dec 13 02:37:42 2017
# Orbit generated from Bernstein formalism
# Fitting   13 observations of   13
# Arc:   1.29y
# First observation: 2011/10/24
#  Last observation: 2013/02/06
Preliminary a, adot, b, bdot, g, gdot:
   0.000008   0.022311  -0.000008  -0.008160   0.024710   0.000000
# Chi-squared of fit:     2.70 DOF:   20 RMS:  0.08
# Min/Max residuals:    -0.14    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.406992E-05  2.245664E-02 -4.926580E-06 -8.264884E-03  2.501863E-02 -6.617452E-04
# Covariance matrix:
  4.2905E-13  5.9543E-13  4.2138E-14 -4.5094E-13  8.5261E-13  4.8094E-11
  5.9543E-13  6.4312E-12  2.6707E-13 -2.9094E-12  4.9671E-12  3.0967E-10
  4.2138E-14  2.6707E-13  2.8874E-13 -4.2722E-13  2.3533E-13  1.4164E-11
 -4.5094E-13 -2.9094E-12 -4.2722E-13  1.9786E-12 -2.5181E-12 -1.5370E-10
  8.5261E-13  4.9671E-12  2.3533E-13 -2.5181E-12  4.7641E-12  2.6857E-10
  4.8094E-11  3.0967E-10  1.4164E-11 -1.5370E-10  2.6857E-10  1.6367E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.998826   28.392244   -0.037095    0.051826   -0.989212  2455858.921236
# Heliocentric elements and errors
Epoch:              2455850.5000  =  2011/10/16
Mean Anomaly:          211.59664 +/-     4.866
Argument of Peri:      322.94496 +/-     4.855
Long of Asc Node:      216.35870 +/-     0.001
Inclination:            20.36293 +/-     0.002
Eccentricity:         0.05294798 +/-    0.0024
Semi-Major Axis:     39.16893402 +/-    0.0154
Time of Perihelion: 2492761.2004 +/-    1210.0
Perihelion:          37.09501805 +/-    0.0954
Aphelion:            41.24284999 +/-    0.0957
Period (y)              245.1438 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.97119006 +/-    0.0031
Ecliptic Y           19.48516011 +/-    0.0016
Ecliptic Z            2.09085615 +/-    0.0002
Ecliptic XDOT        -0.00119417 +/-    0.0000
Ecliptic YDOT         0.00215510 +/-    0.0000
Ecliptic ZDOT        -0.00090693 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.96302794 +/-    0.0028
Geocenter to KBO     39.97020702 +/-    0.0035
# Hcoef:  8.52

The following table shows the complete astrometric record for 11UN412. 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 (11UN412) followed by the observatory code and reference code for the source of the astrometry.

2011 10  24.42047  01 41 06.768  +13 42 09.86  24.4r 11UN412   568  C~1C6Q      
2011 10  24.46320  01 41 06.555  +13 42 08.68  24.5r 11UN412   568  C~1C6Q      
2011 10  24.50589  01 41 06.349  +13 42 07.25  24.6r 11UN412   568  C~1C6Q      
2011 11  24.22382  01 38 51.498  +13 26 04.22        11UN412   568  C~1C6Q      
2011 11  26.44094  01 38 43.326  +13 25 00.76  24.4r 11UN412   568  C~1C6Q      
2012 01  27.28388  01 37 38.830  +13 09 31.25  24.6r 11UN412   568  C~1C6Q      
2012 08  17.58572  01 50 51.959  +14 09 06.34  24.2r 11UN412   568  C~1C6Q      
2012 08  24.54350  01 50 39.471  +14 07 48.79  24.6r 11UN412   568  C~1C6Q      
2012 08  24.59051  01 50 39.366  +14 07 48.16  24.2r 11UN412   568  C~1C6Q      
2012 10  21.31891  01 46 57.637  +13 44 32.24  24.4r 11UN412   568  C~1C6Q      
2012 10  21.34463  01 46 57.516  +13 44 31.40  24.3r 11UN412   568  C~1C6Q      
2012 10  21.37029  01 46 57.377  +13 44 30.62  24.7r 11UN412   568  C~1C6Q      
2013 02  06.29015  01 43 32.022  +13 11 34.55  24.8r 11UN412   568  C~1C6Q      

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     0.03       0.00    -0.06
  2   0.0001     -3.32     0.02       0.02     0.15
  3   0.0002     -6.64     0.02      -0.24     0.09
  4   0.0843  -2188.14    -0.02    -187.87    -0.12
  5   0.0904  -2322.28    -0.04    -203.81    -0.04
  6   0.2597  -3537.24    -0.02    -728.27    -0.12
  7   0.8163   8543.02    -0.14   -1518.10     0.19
  8   0.8354   8345.38     0.03   -1527.00     0.04
  9   0.8355   8343.73    -0.01   -1527.05     0.03
 10   0.9936   4827.06     0.09   -1694.47    -0.03
 11   0.9936   4825.11     0.13   -1694.63    -0.09
 12   0.9937   4822.94    -0.05   -1694.64     0.01
 13   1.2892   1318.93    -0.06   -2473.90    -0.04

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.

11UN412    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        39.231    39.273    39.201
ecceobj         0.051     0.059     0.046
incobj         20.345    20.343    20.346
qmin           36.145    35.898    36.234
qmax           42.083    42.386    41.888
amean          38.990    39.031    38.960
amin           38.684    38.729    38.644
amax           39.304    39.362    39.288
emean           0.051     0.056     0.050
emin            0.034     0.035     0.032
emax            0.071     0.078     0.067
imean          21.756    21.747    21.760
imin           20.816    20.764    20.826
imax           22.563    22.567    22.558
excite_mean     0.374     0.375     0.374
fracstop        1.000     1.000     1.000
cjmean          2.882     2.882     2.882

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       175.5     178.8     174.7
kozaiamp        180.0     180.0     180.0