Orbit Fit and Astrometric record for 11UR411

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: 11UR411   
# Created Wed Dec 13 02:37:42 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   17
# Arc:   4.04y
# First observation: 2011/10/25
#  Last observation: 2015/11/08
Preliminary a, adot, b, bdot, g, gdot:
  -0.000274   0.030711  -0.000157   0.015165   0.027364   0.000000
# Chi-squared of fit:     6.89 DOF:   28 RMS:  0.11
# Min/Max residuals:    -0.26    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.724583E-05  2.993643E-02  9.026990E-06  1.475015E-02  2.773609E-02 -6.036789E-03
# Covariance matrix:
  1.5355E-13 -1.7217E-13  1.6856E-14 -6.7950E-14  3.0954E-14 -1.1253E-12
 -1.7217E-13  6.3541E-13 -7.2230E-14  3.0402E-13  2.8510E-14  5.0337E-12
  1.6856E-14 -7.2230E-14  1.3019E-13 -8.0123E-14  4.6295E-15 -6.2441E-13
 -6.7950E-14  3.0402E-13 -8.0123E-14  2.1035E-13  1.1339E-14  2.6233E-12
  3.0954E-14  2.8510E-14  4.6295E-15  1.1339E-14  3.8504E-13  1.8583E-13
 -1.1253E-12  5.0337E-12 -6.2441E-13  2.6233E-12  1.8583E-13  4.3436E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.695605   32.585917    0.019292    0.081110   -0.987510  2455859.855936
# Heliocentric elements and errors
Epoch:              2455850.5000  =  2011/10/16
Mean Anomaly:          347.49088 +/-     0.011
Argument of Peri:       44.67010 +/-     0.034
Long of Asc Node:       23.34442 +/-     0.000
Inclination:            26.53649 +/-     0.000
Eccentricity:         0.43936772 +/-    0.0001
Semi-Major Axis:     62.55073408 +/-    0.0118
Time of Perihelion: 2462129.2224 +/-       5.3
Perihelion:          35.06796081 +/-    0.0103
Aphelion:            90.03350735 +/-    0.0187
Period (y)              494.7170 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.12508863 +/-    0.0007
Ecliptic Y           19.87114541 +/-    0.0004
Ecliptic Z            2.95178523 +/-    0.0001
Ecliptic XDOT        -0.00219596 +/-    0.0000
Ecliptic YDOT         0.00211093 +/-    0.0000
Ecliptic ZDOT         0.00140240 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.04519669 +/-    0.0006
Geocenter to KBO     36.05410896 +/-    0.0008
# Hcoef:  8.66

The following table shows the complete astrometric record for 11UR411. 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 (11UR411) followed by the observatory code and reference code for the source of the astrometry.

2011 10  25.35517  01 54 49.862  +16 46 30.48  24.1r 11UR411   568  C~1C6O      
2011 10  25.40962  01 54 49.553  +16 46 29.49  24.1r 11UR411   568  C~1C6O      
2011 10  26.31377  01 54 44.538  +16 46 10.59  23.9r 11UR411   568  C~1C6O      
2011 10  26.35693  01 54 44.296  +16 46 09.65  24.1r 11UR411   568  C~1C6O      
2011 10  26.41449  01 54 43.962  +16 46 08.37  23.9r 11UR411   568  C~1C6O      
2011 10  31.40568  01 54 16.331  +16 44 21.90        11UR411   568  C~1C6O      
2011 10  31.42313  01 54 16.232  +16 44 21.65        11UR411   568  C~1C6O      
2011 11  24.29202  01 52 13.405  +16 35 47.22  24.3r 11UR411   568  C~1C6O      
2011 11  30.33825  01 51 46.770  +16 33 47.70  24.3r 11UR411   568  C~1C6O      
2012 01  26.31221  01 50 19.057  +16 26 59.55  24.5r 11UR411   568  C~1C6O      
2012 08  21.48978  02 04 57.770  +18 19 06.34  24.1r 11UR411   568  C~1C6O      
2012 08  24.55204  02 04 51.641  +18 19 27.51  24.4r 11UR411   568  C~1C6O      
2012 10  17.39531  02 01 04.179  +18 12 40.55  24.0r 11UR411   568  C~1C6O      
2012 10  20.49106  02 00 46.860  +18 11 41.63  24.0r 11UR411   568  C~1C6O      
2013 02  06.27170  01 56 02.918  +17 50 44.72  24.6r 11UR411   568  C~1C6O      
2015 11  08.26706  02 16 39.67   +22 18 48.2   23.8R 11UR411   G37  C~1ddG      
2015 11  08.33351  02 16 39.25   +22 18 46.4         11UR411   G37  C~1ddG      

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    -0.04       0.00    -0.13
  2   0.0001     -4.50    -0.00       0.63     0.01
  3   0.0026    -78.59     0.01       8.14     0.07
  4   0.0027    -82.17     0.01       8.48     0.03
  5   0.0029    -87.11    -0.13       8.96     0.00
  6   0.0166   -496.13    -0.10      48.32     0.07
  7   0.0166   -497.55    -0.07      48.58     0.19
  8   0.0820  -2330.77     0.02     188.21    -0.03
  9   0.0985  -2731.28     0.14     211.71    -0.01
 10   0.2545  -4055.88     0.08     277.26    -0.10
 11   0.8245  10082.75    -0.11    2228.91    -0.01
 12   0.8328  10007.58     0.07    2278.35    -0.16
 13   0.9803   6816.84     0.18    2997.21    -0.02
 14   0.9887   6564.52     0.09    3026.36    -0.10
 15   1.2866   2326.95    -0.15    3246.37     0.17
 16   4.0381  24266.80     0.24   12637.72     0.13
 17   4.0383  24260.60    -0.26   12637.86    -0.11

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.

11UR411    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        62.736    62.768    62.704
ecceobj         0.440     0.441     0.440
incobj         26.509    26.509    26.509
qmin           33.832    33.824    33.853
qmax           91.445    91.692    91.358
amean          61.964    61.995    61.927
amin           61.223    61.241    61.184
amax           63.008    63.053    62.951
emean           0.434     0.434     0.434
emin            0.413     0.414     0.413
emax            0.453     0.454     0.452
imean          26.383    26.390    26.372
imin           25.663    25.657    25.663
imax           27.375    27.378    27.362
excite_mean     0.621     0.621     0.621
fracstop        1.000     1.000     1.000
cjmean          2.801     2.801     2.801

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       159.3     159.2     159.5
kozaiamp        180.0     179.9     179.9