Orbit Fit and Astrometric record for 11US412

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: 11US412   
# Created Fri Mar 29 01:14:17 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     18 observations of     18
# Arc:   8.16y
# First observation: 2011/08/29
#  Last observation: 2019/10/26
# Chi-squared of fit:     6.83 DOF:     30 RMS:  0.11
# Min/Max residuals:    -0.23    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.383132E-05  1.999953E-02  3.657542E-07  8.071821E-04  2.169182E-02 -2.844645E-03
# Covariance matrix:
  4.1548E-13 -8.2381E-14  2.1693E-16 -3.0539E-15  2.9010E-13 -3.8805E-13
 -8.2381E-14  4.2814E-13 -8.7159E-15  1.9370E-14  1.4292E-13  2.6765E-12
  2.1693E-16 -8.7159E-15  1.0545E-13 -1.8192E-14 -4.1808E-15 -5.6235E-14
 -3.0539E-15  1.9370E-14 -1.8192E-14  1.3428E-14  6.6157E-15  1.2474E-13
  2.9010E-13  1.4292E-13 -4.1808E-15  6.6157E-15  3.7409E-13  9.4943E-13
 -3.8805E-13  2.6765E-12 -5.6235E-14  1.2474E-13  9.4943E-13  1.7239E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.165404   32.332236    0.841705    0.011216   -0.552530  2455803.089696
# Heliocentric elements and errors
Epoch:              2455802.5000  =  2011/08/29
Mean Anomaly:          290.40812 +/-     0.021
Argument of Peri:      114.17548 +/-     0.033
Long of Asc Node:        5.03386 +/-     0.003
Inclination:             2.60050 +/-     0.000
Eccentricity:         0.16120086 +/-    0.0002
Semi-Major Axis:     48.19347675 +/-    0.0056
Time of Perihelion: 2479425.6004 +/-      18.7
Perihelion:          40.42464686 +/-    0.0110
Aphelion:            55.96230663 +/-    0.0119
Period (y)              334.5728 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.86540800 +/-    0.0011
Ecliptic Y           24.23623577 +/-    0.0007
Ecliptic Z            0.93765523 +/-    0.0000
Ecliptic XDOT        -0.00165826 +/-    0.0000
Ecliptic YDOT         0.00194521 +/-    0.0000
Ecliptic ZDOT         0.00009462 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.66406646 +/-    0.0010
Geocenter to KBO     46.10044515 +/-    0.0013
# Hcoef:  7.73

The following table shows the complete astrometric record for 11US412. 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 (11US412) followed by the observatory code and reference code for the source of the astrometry.

2011 08  29.58893  01 58 55.926  +13 22 37.48  23.7r 11US412   568  C~1CKy      
2011 10  24.40763  01 55 40.018  +13 06 09.33  24.6r 11US412   568  C~1CKy      
2011 10  24.45036  01 55 39.831  +13 06 08.40  24.3r 11US412   568  C~1CKy      
2011 10  24.49308  01 55 39.648  +13 06 07.60  24.3r 11US412   568  C~1CKy      
2011 10  26.42741  01 55 31.335  +13 05 23.38  24.1r 11US412   568  C~1CKy      
2011 10  28.48438  01 55 22.507  +13 04 36.22  24.5r 11US412   568  C~1CKy      
2011 10  30.52869  01 55 13.758  +13 03 49.53  23.9r 11US412   568  C~1CKy      
2011 10  31.51164  01 55 09.577  +13 03 26.89  24.4r 11US412   568  C~1CKy      
2011 11  24.27924  01 53 34.898  +12 54 49.34  24.5r 11US412   568  C~1CKy      
2011 11  30.32546  01 53 14.211  +12 52 53.44  24.5r 11US412   568  C~1CKy      
2012 01  27.33441  01 52 06.560  +12 45 44.43  24.1r 11US412   568  C~1CKy      
2012 08  24.52210  02 03 27.082  +13 49 32.12  24.3r 11US412   568  C~1CKy      
2012 10  17.36966  02 00 31.709  +13 35 17.22  24.5r 11US412   568  C~1CKy      
2012 10  20.46455  02 00 18.433  +13 34 08.38  24.2r 11US412   568  C~1CKy      
2013 01  14.33106  01 56 16.234  +13 11 39.84  24.8r 11US412   568  C~1CKy      
2013 02  09.23506  01 56 47.115  +13 13 54.97  24.3r 11US412   568  C~1CKy      
2019 10  26.383710 02 32 00.837  +16 34 55.53  24.3G 11US412   G37  C~3chz      
2019 10  26.468730 02 32 00.459  +16 34 53.92        11US412   G37  C~3chz      

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     0.13       0.00     0.10
     2   0.1528      0.00    -0.02       0.00    -0.16
     3   0.1529      0.00    -0.02       0.00    -0.12
     4   0.1531      0.00     0.04       0.00     0.06
     5   0.1584      0.00    -0.11       0.00     0.03
     6   0.1640      0.00    -0.10       0.00    -0.05
     7   0.1696      0.00    -0.12       0.00     0.07
     8   0.1723      0.00     0.02       0.00    -0.09
     9   0.2373      0.00     0.11       0.00    -0.07
    10   0.2539      0.00     0.08       0.00    -0.10
    11   0.4127      0.00     0.13       0.00    -0.14
    12   0.9882      0.00    -0.17       0.00     0.02
    13   1.1356      0.00     0.02       0.00     0.07
    14   1.1441      0.00     0.14       0.00     0.07
    15   1.3792      0.00    -0.23       0.00     0.05
    16   1.4501      0.00    -0.02       0.00     0.29
    17   8.1582      0.00    -0.04       0.00    -0.10
    18   8.1585      0.00     0.08       0.00     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.

11US412    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        48.301    48.301    48.301
ecceobj         0.161     0.161     0.161
incobj          2.598     2.598     2.598
qmin           37.776    38.410    38.436
qmax           58.851    58.006    58.138
amean          47.754    47.725    48.005
amin           47.095    47.085    47.072
amax           48.598    48.594    48.596
emean           0.158     0.159     0.156
emin            0.118     0.128     0.119
emax            0.212     0.197     0.200
imean           3.473     3.487     3.510
imin            2.645     2.645     2.644
imax            4.185     4.216     4.256
excite_mean     0.170     0.170     0.167
fracstop        1.000     1.000     1.000
cjmean          3.112     3.112     3.116

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       185.6     177.8     182.8
kozaiamp        180.0     180.0     179.9