Orbit Fit and Astrometric record for 13EZ27

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: 13EZ27    
# Created Tue Oct 24 01:38:12 2017
# Orbit generated from Bernstein formalism
# Fitting   35 observations of   35
# Arc:   4.20y
# First observation: 2011/01/30
#  Last observation: 2015/04/14
Preliminary a, adot, b, bdot, g, gdot:
  -0.243921   0.474724   0.068809  -0.119759   0.180696   0.000000
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# WARNING -- MRQMIN stopped after  11 iterations
# Chi-squared of fit:  9999.99 DOF:   65 RMS: 99.99
# Min/Max residuals: -9999.99 9999.99
# Exact a, adot, b, bdot, g, gdot:
  1.097985E-01  1.415792E-01 -3.853735E-02 -3.304233E-02  6.461390E-02 -1.687910E-01
# Covariance matrix:
  2.3606E-13 -1.0531E-13 -3.2944E-14  1.8429E-14 -2.1866E-14 -1.3722E-14
 -1.0531E-13  5.4711E-14  1.9483E-14 -1.0877E-14  1.8246E-14  7.2860E-15
 -3.2944E-14  1.9483E-14  1.2402E-13 -3.7821E-14  4.7606E-15  3.9509E-15
  1.8429E-14 -1.0877E-14 -3.7821E-14  1.2948E-14 -2.5612E-15 -2.2287E-15
 -2.1866E-14  1.8246E-14  4.7606E-15 -2.5612E-15  2.7574E-14 -1.8259E-15
 -1.3722E-14  7.2860E-15  3.9509E-15 -2.2287E-15 -1.8259E-15  2.3396E-15
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.788875  132.296523    0.035457    0.082444   -0.984128  2455591.991906
# Heliocentric elements and errors
Epoch:              2455590.5000  =  2011/01/29
Mean Anomaly:          351.40288 +/-     0.234
Argument of Peri:      226.76213 +/-     0.000
Long of Asc Node:      327.32938 +/-     0.000
Inclination:            14.67525 +/-     0.000
Eccentricity:         2.98418329 +/-    0.0000
Semi-Major Axis:     -5.55812495 +/-    0.0001
Time of Perihelion: 2458050.0265 +/-      66.8
Perihelion:          11.02833866 +/-    0.0002
Aphelion:           -22.14458856 +/-    0.0002
Period (y)              281.9752 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -12.30352396 +/-    0.0000
Ecliptic Y           11.05467357 +/-    0.0000
Ecliptic Z            0.69769374 +/-    0.0000
Ecliptic XDOT         0.00027925 +/-    0.0000
Ecliptic YDOT        -0.00921636 +/-    0.0000
Ecliptic ZDOT        -0.00199227 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   16.55503809 +/-    0.0000
Geocenter to KBO     15.58097693 +/-    0.0000
# Hcoef:   NaN

The following table shows the complete astrometric record for 13EZ27. 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 (13EZ27) followed by the observatory code and reference code for the source of the astrometry.

2011 01  30.49114  09 04 48.442  +21 42 10.24  22.6w 13EZ27    F51  C~1vWw      
2011 01  30.50742  09 04 48.137  +21 42 10.90  22.5w 13EZ27    F51  C~1vWw      
2011 01  30.52250  09 04 47.850  +21 42 11.62  22.5w 13EZ27    F51  C~1vWw      
2012 02  03.54155  09 58 05.797  +13 24 55.99  21.7i 13EZ27    F51  C~1vWw      
2012 02  03.55443  09 58 05.567  +13 24 56.57  21.9i 13EZ27    F51  C~1vWw      
2012 02  03.58741  09 58 04.988  +13 24 58.24  22.1r 13EZ27    F51  C~1vWw      
2013 03  05.41133  10 46 26.756  +03 41 43.93  22.0w 13EZ27    F51  C@0613      
2013 03  05.42627  10 46 26.488  +03 41 44.85  22.1w 13EZ27    F51  C@0613      
2013 03  05.44122  10 46 26.214  +03 41 45.72  22.0w 13EZ27    F51  C@0613      
2013 03  05.45617  10 46 25.946  +03 41 46.68  22.1w 13EZ27    F51  C@0613      
2013 03  06.367112 10 46 09.828  +03 42 42.92  21.3R 13EZ27    568  C~0psa      
2013 03  06.368366 10 46 09.804  +03 42 42.94  21.3R 13EZ27    568  C~0psa      
2013 03  06.369625 10 46 09.784  +03 42 43.10  21.3R 13EZ27    568  C~0psa      
2013 03  08.336820 10 45 35.07   +03 44 45.2   21.9R 13EZ27    F65  C~0psa      
2013 03  08.342957 10 45 34.97   +03 44 45.1   21.9R 13EZ27    F65  C~0psa      
2013 03  08.345967 10 45 34.89   +03 44 45.3   21.3R 13EZ27    F65  C~0psa      
2013 03  08.348989 10 45 34.84   +03 44 46.0   21.7R 13EZ27    F65  C~0psa      
2013 12  14.63431  11 53 16.013  -06 14 10.83  22.7w 13EZ27    F51  C~1vWw      
2013 12  14.63864  11 53 16.062  -06 14 11.46  22.4w 13EZ27    F51  C~1vWw      
2013 12  14.64264  11 53 16.107  -06 14 11.92  22.5w 13EZ27    F51  C~1vWw      
2014 03  24.40427  11 41 25.266  -07 10 24.73  21.8w 13EZ27    F51  C~1vWw      
2014 03  24.41657  11 41 25.054  -07 10 23.84  21.9w 13EZ27    F51  C~1vWw      
2014 03  24.42886  11 41 24.826  -07 10 22.86  22.2w 13EZ27    F51  C~1vWw      
2014 03  24.44118  11 41 24.602  -07 10 22.13  21.9w 13EZ27    F51  C~1vWw      
2014 04  28.30750  11 33 09.144  -06 27 22.01  22.0w 13EZ27    F51  C~1vWw      
2014 04  28.31980  11 33 09.013  -06 27 21.41  22.1w 13EZ27    F51  C~1vWw      
2014 04  28.33207  11 33 08.895  -06 27 20.48  22.1w 13EZ27    F51  C~1vWw      
2014 04  28.34436  11 33 08.758  -06 27 19.77  22.4w 13EZ27    F51  C~1vWw      
2014 05  24.26477  11 31 12.599  -06 10 08.54  22.1w 13EZ27    F51  C~1vWw      
2014 05  24.27805  11 31 12.601  -06 10 08.76  22.1w 13EZ27    F51  C~1vWw      
2014 05  24.29132  11 31 12.597  -06 10 08.28  22.4w 13EZ27    F51  C~1vWw      
2014 05  24.30460  11 31 12.608  -06 10 08.11  22.4w 13EZ27    F51  C~1vWw      
2015 04  14.06337  12 39 06.49   -17 36 26.7   22.4V 13EZ27    W84  C~2Jxu      
2015 04  14.14229  12 39 05.12   -17 36 20.0         13EZ27    W84  C~2Jxu      
2015 04  14.23919  12 39 03.42   -17 36 11.7         13EZ27    W84  C~2Jxu      

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      0.00-22639.43       0.00  7946.89
  2   0.0000     -4.26-22641.34      -0.59  7946.67
  3   0.0001     -8.30-22643.21      -1.06  7946.56
  4   1.0104  54144.68 -7825.76  -13714.23  4208.76
  5   1.0104  54141.10 -7827.35  -13714.87  4208.56
  6   1.0105  54132.02 -7831.33  -13716.29  4208.28
  7   2.0942 117059.63 -1591.87  -33161.41  1658.90
  8   2.0943 117054.25 -1594.14  -33162.01  1658.93
  9   2.0943 117048.79 -1596.50  -33162.71  1658.86
 10   2.0944 117043.39 -1598.79  -33163.27  1658.93
 11   2.0969 116719.51 -1738.96  -33198.63  1659.92
 12   2.0969 116719.06 -1739.15  -33198.76  1659.85
 13   2.0969 116718.61 -1739.34  -33198.70  1659.96
 14   2.1022 116021.94 -2039.96  -33273.55  1662.63
 15   2.1023 116020.18 -2040.45  -33274.27  1662.16
 16   2.1023 116018.62 -2041.39  -33274.53  1662.02
 17   2.1023 116017.33 -2042.06  -33274.06  1662.61
 18   2.8724 238583.66  8016.11  -52993.28  2078.34
 19   2.8724 238585.89  8016.20  -52993.92  2078.41
 20   2.8724 238587.80  8016.15  -52994.32  2078.66
 21   3.1456 220646.22 -8660.30  -62638.36  3149.50
 22   3.1456 220639.18 -8663.15  -62638.28  3149.93
 23   3.1456 220631.59 -8666.56  -62638.17  3150.40
 24   3.1457 220624.36 -8669.59  -62638.40  3150.51
 25   3.2411 204316.72-15853.77  -61769.47  4348.41
 26   3.2411 204312.64-15855.86  -61769.37  4348.52
 27   3.2412 204308.61-15857.90  -61768.72  4349.18
 28   3.2412 204304.28-15860.25  -61768.50  4349.42
 29   3.3122 200271.02-19060.47  -60970.55  5175.59
 30   3.3122 200271.27-19061.40  -60970.85  5175.40
 31   3.3123 200270.73-19063.11  -60970.18  5176.17
 32   3.3123 200270.87-19064.15  -60969.88  5176.58
 33   4.2014 436320.00********* -123854.96 27512.72
 34   4.2016 436204.52********* -123836.42 27518.92
 35   4.2019 436061.34********* -123813.47 27526.38

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.

13EZ27    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        19.565    19.565    19.565
ecceobj         0.544     0.544     0.544
incobj         14.621    14.621    14.621
qmin            8.695     8.767     8.389
qmax           35.683    32.070    32.107
amean          21.060    19.211    19.869
amin           18.507    18.546    18.929
amax           22.481    20.485    20.486
emean           0.572     0.538     0.567
emin            0.530     0.523     0.538
emax            0.598     0.566     0.579
imean          14.794    15.712    14.064
imin           13.914    15.315    13.432
imax           15.842    15.925    15.842
excite_mean     0.626     0.603     0.617
fracstop        0.003     0.001     0.004
cjmean          2.759     2.861     2.813

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       259.5     223.7     266.6
kozaiamp         42.7      11.9      48.7