Orbit Fit and Astrometric record for 12UE178

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: 12UE178   
# Created Sat Oct 21 01:38:11 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   21
# Arc:   3.05y
# First observation: 2010/11/09
#  Last observation: 2013/11/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000062   0.020336  -0.000004   0.001302   0.022544   0.000000
# Chi-squared of fit:    10.86 DOF:   34 RMS:  0.13
# Min/Max residuals:    -0.29    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.452121E-05  2.027266E-02  1.269709E-06  1.301227E-03  2.235059E-02 -3.430086E-04
# Covariance matrix:
  3.3663E-13 -3.4625E-13  5.9373E-15 -1.5984E-14 -2.0527E-13 -3.9295E-12
 -3.4625E-13  7.4214E-13 -1.6541E-14  4.4431E-14  5.9145E-13  1.0926E-11
  5.9373E-15 -1.6541E-14  2.4907E-13 -1.0221E-13 -1.3728E-14 -2.6539E-13
 -1.5984E-14  4.4431E-14 -1.0221E-13  6.1305E-14  3.4071E-14  7.1816E-13
 -2.0527E-13  5.9145E-13 -1.3728E-14  3.4071E-14  1.0361E-12  8.4632E-12
 -3.9295E-12  1.0926E-11 -2.6539E-13  7.1816E-13  8.4632E-12  1.7644E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.063290   61.488239    0.246010   -0.034462   -0.956750  2455510.028606
# Heliocentric elements and errors
Epoch:              2455510.5000  =  2010/11/10
Mean Anomaly:          207.23947 +/-     0.716
Argument of Peri:      126.13219 +/-     0.713
Long of Asc Node:       90.01708 +/-     0.004
Inclination:             4.18164 +/-     0.001
Eccentricity:         0.04562367 +/-    0.0003
Semi-Major Axis:     43.90122377 +/-    0.0060
Time of Perihelion: 2500594.4566 +/-     211.0
Perihelion:          41.89828883 +/-    0.0136
Aphelion:            45.90415872 +/-    0.0138
Period (y)              290.8862 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           22.01984606 +/-    0.0010
Ecliptic Y           40.01287601 +/-    0.0018
Ecliptic Z           -1.61081541 +/-    0.0001
Ecliptic XDOT        -0.00219969 +/-    0.0000
Ecliptic YDOT         0.00115986 +/-    0.0000
Ecliptic ZDOT         0.00016080 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.70009402 +/-    0.0016
Geocenter to KBO     44.74155575 +/-    0.0020
# Hcoef:  6.05

The following table shows the complete astrometric record for 12UE178. 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 (12UE178) followed by the observatory code and reference code for the source of the astrometry.

2010 11  09.52784  03 59 14.834  +18 26 16.15  23.3w 12UE178   F51  C~1w3s      
2010 11  09.54599  03 59 14.751  +18 26 16.04  22.7w 12UE178   F51  C~1w3s      
2010 11  09.56427  03 59 14.677  +18 26 15.73  22.8w 12UE178   F51  C~1w3s      
2010 11  17.50102  03 58 37.786  +18 24 29.98  22.2i 12UE178   F51  C~1w3s      
2011 10  26.41810  04 05 01.863  +18 47 21.27  22.8w 12UE178   F51  C~1w3s      
2011 10  26.43261  04 05 01.791  +18 47 21.09  22.9w 12UE178   F51  C~1w3s      
2011 10  26.44713  04 05 01.733  +18 47 20.95  22.9w 12UE178   F51  C~1w3s      
2011 12  01.50631  04 02 17.756  +18 39 49.26  22.2r 12UE178   F51  C~1w3s      
2012 10  21.55906  04 10 03.924  +19 05 40.56  22.6w 12UE178   F51  C~1w3s      
2012 10  21.57510  04 10 03.847  +19 05 40.42  22.7w 12UE178   F51  C~1w3s      
2012 12  10.28457  04 06 19.637  +18 55 52.48  22.6w 12UE178   F51  C~1w3s      
2012 12  10.30010  04 06 19.566  +18 55 52.36  22.5w 12UE178   F51  C~1w3s      
2012 12  10.32572  04 06 19.430  +18 55 52.32  22.6w 12UE178   F51  C~1w3s      
2013 03  06.24020  04 03 41.992  +18 52 37.72  22.6w 12UE178   F51  C~1w3s      
2013 03  06.24575  04 03 41.992  +18 52 38.49  22.4w 12UE178   F51  C~1w3s      
2013 11  09.51954  04 13 33.717  +19 19 20.83  22.4w 12UE178   F51  C~1w3s      
2013 11  09.54975  04 13 33.579  +19 19 20.58  22.7w 12UE178   F51  C~1w3s      
2013 11  26.33368  04 12 14.614  +19 16 02.96  22.7w 12UE178   F51  C~1w3s      
2013 11  26.34897  04 12 14.547  +19 16 02.91  22.4w 12UE178   F51  C~1w3s      
2013 11  26.36430  04 12 14.464  +19 16 02.86  22.7w 12UE178   F51  C~1w3s      
2013 11  26.37967  04 12 14.394  +19 16 02.55  22.4w 12UE178   F51  C~1w3s      

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    -0.07
  2   0.0000     -1.18     0.01       0.13     0.05
  3   0.0001     -2.27     0.14       0.04    -0.04
  4   0.0218   -537.82     0.02       1.73    -0.29
  5   0.9607   5086.50    -0.03     272.63     0.16
  6   0.9607   5085.47    -0.22     272.65     0.19
  7   0.9608   5084.63    -0.20     272.67     0.21
  8   1.0595   2710.94     0.04     281.76     0.00
  9   1.9494   9508.22     0.34     543.56     0.05
 10   1.9495   9507.12     0.12     543.62     0.13
 11   2.0856   6268.81    -0.01     563.30    -0.19
 12   2.0856   6267.79     0.02     563.37    -0.14
 13   2.0857   6265.89    -0.16     563.70     0.14
 14   2.3209   4034.55     0.12     802.24    -0.17
 15   2.3209   4034.70 (   0.12)    803.00 (   0.57)
 16   3.0007  12588.69    -0.01     807.50     0.02
 17   3.0007  12586.72     0.02     807.61     0.12
 18   3.0467  11447.61    -0.10     815.75    -0.16
 19   3.0467  11446.66     0.02     815.87    -0.06
 20   3.0468  11445.50    -0.07     816.04     0.09
 21   3.0468  11444.46    -0.02     815.91    -0.05

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.

12UE178    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.097    44.114    44.079
ecceobj         0.042     0.042     0.042
incobj          4.177     4.177     4.177
qmin           41.046    41.040    41.013
qmax           46.744    46.780    46.757
amean          43.804    43.821    43.786
amin           43.475    43.476    43.444
amax           44.153    44.169    44.139
emean           0.043     0.044     0.043
emin            0.026     0.027     0.026
emax            0.059     0.060     0.059
imean           2.399     2.403     2.392
imin            1.677     1.688     1.665
imax            3.033     3.034     3.035
excite_mean     0.061     0.061     0.060
fracstop        1.000     1.000     1.000
cjmean          3.095     3.095     3.095

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       190.8     189.9     191.4
kozaiamp        179.9     179.9     180.0