Orbit Fit and Astrometric record for 12UP177

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: 12UP177   
# Created Sat Oct 21 01:38:11 2017
# Orbit generated from Bernstein formalism
# Fitting   27 observations of   27
# Arc:   1.46y
# First observation: 2011/08/31
#  Last observation: 2013/02/14
Preliminary a, adot, b, bdot, g, gdot:
  -0.000138   0.025955  -0.000004  -0.002858   0.025325   0.000000
# Chi-squared of fit:     6.92 DOF:   48 RMS:  0.09
# Min/Max residuals:    -0.22    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.630101E-05  2.584812E-02 -1.153961E-06 -2.896181E-03  2.540360E-02  2.401628E-03
# Covariance matrix:
  4.7903E-13  6.2995E-14  5.5805E-15 -7.4241E-14  4.5188E-13  2.0054E-11
  6.2995E-14  5.3031E-13  1.0952E-14 -9.0613E-14  4.3209E-13  2.3859E-11
  5.5805E-15  1.0952E-14  2.0174E-13 -1.9047E-13  1.1338E-14  9.1412E-13
 -7.4241E-14 -9.0613E-14 -1.9047E-13  2.6626E-13 -1.2982E-13 -7.4135E-12
  4.5188E-13  4.3209E-13  1.1338E-14 -1.2982E-13  7.4457E-13  3.4830E-11
  2.0054E-11  2.3859E-11  9.1412E-13 -7.4135E-12  3.4830E-11  1.9493E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   15.720659   32.984780    0.829133    0.154533   -0.549107  2455805.041466
# Heliocentric elements and errors
Epoch:              2455800.5000  =  2011/08/27
Mean Anomaly:           39.90480 +/-     0.481
Argument of Peri:       62.43609 +/-     0.662
Long of Asc Node:      280.21388 +/-     0.004
Inclination:            16.59483 +/-     0.000
Eccentricity:         0.10287804 +/-    0.0014
Semi-Major Axis:     43.11575012 +/-    0.0121
Time of Perihelion: 2444338.1161 +/-     138.1
Perihelion:          38.68008619 +/-    0.0596
Aphelion:            47.55141406 +/-    0.0601
Period (y)              283.1145 +/-      0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.71765422 +/-    0.0011
Ecliptic Y           20.24536047 +/-    0.0007
Ecliptic Z           10.66568821 +/-    0.0004
Ecliptic XDOT        -0.00123985 +/-    0.0000
Ecliptic YDOT         0.00252381 +/-    0.0000
Ecliptic ZDOT        -0.00023027 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.92588663 +/-    0.0010
Geocenter to KBO     39.36449453 +/-    0.0013
# Hcoef:  8.11

The following table shows the complete astrometric record for 12UP177. 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 (12UP177) followed by the observatory code and reference code for the source of the astrometry.

2011 08  31.54070  01 39 11.192  +27 11 47.81  24.1r 12UP177   568  C~1C6U      
2011 08  31.60502  01 39 10.981  +27 11 48.12        12UP177   568  C~1C6U      
2011 09  05.51099  01 38 54.837  +27 11 53.59  23.8r 12UP177   568  C~1C6U      
2011 11  24.38502  01 32 34.574  +26 40 23.23  24.0r 12UP177   568  C~1C6U      
2011 11  30.46714  01 32 11.460  +26 36 34.04  23.8r 12UP177   568  C~1C6U      
2011 11  30.47141  01 32 11.445  +26 36 34.15  24.5r 12UP177   568  C~1C6U      
2011 11  30.47570  01 32 11.435  +26 36 34.05  24.3r 12UP177   568  C~1C6U      
2011 12  01.38483  01 32 08.215  +26 35 59.71  24.1r 12UP177   568  C~1C6U      
2011 12  01.40191  01 32 08.154  +26 35 59.07  24.1r 12UP177   568  C~1C6U      
2012 01  28.27120  01 31 28.926  +26 08 20.05        12UP177   568  C~1C6U      
2012 08  18.52671  01 46 09.366  +27 33 45.68  23.8r 12UP177   568  C~1C6U      
2012 08  21.50757  01 46 03.419  +27 34 18.64  24.2r 12UP177   568  C~1C6U      
2012 08  28.44178  01 45 46.456  +27 35 12.06        12UP177   568  C~1C6U      
2012 08  28.48038  01 45 46.338  +27 35 12.28        12UP177   568  C~1C6U      
2012 08  28.52418  01 45 46.224  +27 35 12.55        12UP177   568  C~1C6U      
2012 09  14.46013  01 44 47.871  +27 35 05.90  23.9r 12UP177   568  C~1C6U      
2012 10  19.39864  01 41 57.239  +27 25 01.63  23.8r 12UP177   568  C~1C6U      
2012 10  20.39070  01 41 51.951  +27 24 34.29        12UP177   568  C~1C6U      
2012 10  21.40089  01 41 46.574  +27 24 06.05  23.9r 12UP177   568  C~1C6U      
2012 10  21.43944  01 41 46.366  +27 24 04.94  24.0r 12UP177   568  C~1C6U      
2012 10  21.47785  01 41 46.153  +27 24 03.94  23.9r 12UP177   568  C~1C6U      
2012 10  21.49508  01 41 46.063  +27 24 03.32  24.1r 12UP177   568  C~1C6U      
2012 10  23.37162  01 41 36.095  +27 23 09.53  23.8r 12UP177   568  C~1C6U      
2012 11  14.38888  01 39 44.218  +27 11 00.69  23.9r 12UP177   568  C~1C6U      
2013 01  14.26873  01 37 26.717  +26 37 10.33  24.0r 12UP177   568  C~1C6U      
2013 01  14.29892  01 37 26.743  +26 37 09.47  23.8r 12UP177   568  C~1C6U      
2013 02  14.27187  01 38 41.625  +26 30 12.27  24.3r 12UP177   568  C~1C6U      

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   0.0002     -2.49    -0.06       1.34     0.02
  3   0.0136   -200.07     0.07      87.27     0.16
  4   0.2323  -5623.15    -0.00     279.66    -0.05
  5   0.2489  -5997.95     0.01     188.46    -0.16
  6   0.2490  -5998.09     0.12     188.64     0.09
  7   0.2490  -5998.26     0.21     188.60     0.12
  8   0.2515  -6051.43    -0.05     173.69    -0.02
  9   0.2515  -6052.43    -0.05     173.42    -0.02
 10   0.4099  -7184.03    -0.22   -1151.15     0.07
 11   0.9664   5664.86     0.10    -828.58    -0.17
 12   0.9746   5603.04    -0.00    -769.18     0.05
 13   0.9936   5412.08     0.02    -637.57    -0.10
 14   0.9937   5410.70    -0.09    -636.79    -0.06
 15   0.9938   5409.39     0.06    -635.99    -0.09
 16   1.0402   4683.88    -0.04    -359.88    -0.07
 17   1.1358   2349.66     0.07     -87.89    -0.00
 18   1.1385   2274.12    -0.04     -87.23     0.01
 19   1.1413   2197.14    -0.01     -86.95     0.05
 20   1.1414   2194.15    -0.01     -86.96     0.03
 21   1.1415   2191.15    -0.03     -86.83     0.14
 22   1.1416   2189.81    -0.04     -86.97     0.00
 23   1.1467   2046.56    -0.03     -87.74     0.08
 24   1.2070    390.91    -0.11    -208.77     0.10
 25   1.3737  -2077.25     0.08   -1398.01    -0.01
 26   1.3737  -2077.25     0.08   -1398.94    -0.18
 27   1.4585  -1304.08     0.00   -2164.33     0.12

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.

12UP177    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.206    43.246    43.169
ecceobj         0.105     0.109     0.101
incobj         16.596    16.596    16.597
qmin           37.924    37.818    38.073
qmax           48.103    48.312    47.838
amean          42.882    42.911    42.837
amin           42.538    42.571    42.501
amax           43.260    43.292    43.198
emean           0.098     0.102     0.094
emin            0.084     0.088     0.081
emax            0.113     0.116     0.108
imean          18.317    18.313    18.319
imin           17.769    17.766    17.773
imax           18.788    18.781    18.778
excite_mean     0.329     0.330     0.328
fracstop        1.000     1.000     1.000
cjmean          2.956     2.955     2.956

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       175.9     175.7     175.8
kozaiamp        180.0     180.0     180.0