Orbit Fit and Astrometric record for 12UB178

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: 12UB178   
# Created Thu Dec 14 02:37:51 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   17
# Arc:   1.10y
# First observation: 2012/10/21
#  Last observation: 2013/11/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000062   0.018975  -0.000005  -0.001705   0.021576   0.000000
# Chi-squared of fit:    12.80 DOF:   28 RMS:  0.15
# Min/Max residuals:    -0.32    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.256140E-05  1.899821E-02 -2.701965E-06 -1.702615E-03  2.183158E-02  1.356266E-03
# Covariance matrix:
  4.8679E-13  2.8950E-13  6.8469E-16 -7.9697E-14  7.1785E-13  4.1540E-11
  2.8950E-13  5.6928E-12  6.0713E-14 -8.2970E-13  3.4864E-12  3.9302E-10
  6.8469E-16  6.0713E-14  2.5992E-13 -2.6600E-13  2.8213E-14  4.4548E-12
 -7.9697E-14 -8.2970E-13 -2.6600E-13  5.1078E-13 -5.3292E-13 -6.1352E-11
  7.1785E-13  3.4864E-12  2.8213E-14 -5.3292E-13  3.0416E-12  2.6037E-10
  4.1540E-11  3.9302E-10  4.4548E-12 -6.1352E-11  2.6037E-10  2.9087E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
   -7.434545   55.312947    0.450910   -0.114383   -0.876967  2456222.048038
# Heliocentric elements and errors
Epoch:              2456220.5000  =  2012/10/20
Mean Anomaly:          142.30636 +/-     3.819
Argument of Peri:       85.70957 +/-     3.778
Long of Asc Node:      180.32599 +/-     0.012
Inclination:             8.94206 +/-     0.001
Eccentricity:         0.10661903 +/-    0.0040
Semi-Major Axis:     42.90603962 +/-    0.0436
Time of Perihelion: 2415641.8245 +/-    1087.2
Perihelion:          38.33143945 +/-    0.1760
Aphelion:            47.48063979 +/-    0.1783
Period (y)              281.0515 +/-      0.43
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.72362407 +/-    0.0021
Ecliptic Y           37.82098543 +/-    0.0030
Ecliptic Z           -5.92703616 +/-    0.0005
Ecliptic XDOT        -0.00188481 +/-    0.0000
Ecliptic YDOT         0.00147394 +/-    0.0000
Ecliptic ZDOT        -0.00023360 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.68735139 +/-    0.0027
Geocenter to KBO     45.80520156 +/-    0.0037
# Hcoef:  5.75

The following table shows the complete astrometric record for 12UB178. 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 (12UB178) followed by the observatory code and reference code for the source of the astrometry.

2012 10  21.54726  03 39 08.665  +11 51 55.90  22.6w 12UB178   F51  C~1w3s      
2012 10  21.56332  03 39 08.592  +11 51 55.24  22.5w 12UB178   F51  C~1w3s      
2012 10  21.57933  03 39 08.514  +11 51 54.86  22.6w 12UB178   F51  C~1w3s      
2012 12  10.27514  03 35 35.188  +11 38 24.63  22.2w 12UB178   F51  C~1w3s      
2012 12  10.29059  03 35 35.104  +11 38 24.57  22.4w 12UB178   F51  C~1w3s      
2012 12  10.31620  03 35 35.017  +11 38 24.03  22.4w 12UB178   F51  C~1w3s      
2013 03  05.24285  03 33 50.365  +11 42 51.82  22.5w 12UB178   F51  C~1w3s      
2013 11  09.51066  03 42 16.923  +11 55 32.42  22.7w 12UB178   F51  C~1w3s      
2013 11  09.52573  03 42 16.868  +11 55 32.07  22.8w 12UB178   F51  C~1w3s      
2013 11  09.52639  03 42 16.846  +11 55 32.16  22.2w 12UB178   F51  C~1w3s      
2013 11  09.54084  03 42 16.781  +11 55 32.08  22.5w 12UB178   F51  C~1w3s      
2013 11  09.54150  03 42 16.771  +11 55 32.20  22.4w 12UB178   F51  C~1w3s      
2013 11  09.55599  03 42 16.719  +11 55 31.74  22.4w 12UB178   F51  C~1w3s      
2013 11  09.55665  03 42 16.718  +11 55 31.52  22.4w 12UB178   F51  C~1w3s      
2013 11  26.32178  03 41 02.017  +11 51 00.01  22.6w 12UB178   F51  C~1w3s      
2013 11  26.35235  03 41 01.892  +11 50 59.62  22.5w 12UB178   F51  C~1w3s      
2013 11  26.36773  03 41 01.839  +11 50 59.32  22.6w 12UB178   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     0.25       0.00     0.30
  2   0.0000     -1.20     0.02      -0.39    -0.01
  3   0.0001     -2.40    -0.22      -0.50    -0.03
  4   0.1361  -3238.02     0.03     -58.96    -0.07
  5   0.1362  -3239.23    -0.23     -58.73     0.11
  6   0.1363  -3240.60    -0.02     -58.95    -0.20
  7   0.3688  -4672.35     0.20     562.96    -0.19
  8   1.0512   2739.13     0.07    -424.69    -0.10
  9   1.0513   2738.27     0.22    -424.85    -0.23
 10   1.0513   2737.97    -0.03    -424.69    -0.06
 11   1.0513   2737.03     0.01    -424.55     0.11
 12   1.0513   2736.91    -0.06    -424.40     0.26
 13   1.0514   2736.06     0.07    -424.67     0.02
 14   1.0514   2736.00     0.05    -424.88    -0.19
 15   1.0973   1606.35    -0.32    -437.93     0.13
 16   1.0973   1604.47    -0.12    -437.89     0.14
 17   1.0974   1603.64     0.10    -438.00     0.01

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.

12UB178    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.014    43.174    42.899
ecceobj         0.107     0.119     0.097
incobj          8.927     8.929     8.924
qmin           37.490    37.128    37.697
qmax           48.257    49.016    47.728
amean          42.718    42.889    42.608
amin           42.371    42.523    42.249
amax           43.091    43.282    42.982
emean           0.100     0.114     0.093
emin            0.081     0.094     0.071
emax            0.120     0.133     0.112
imean           9.639     9.571     9.659
imin            8.551     8.457     8.524
imax           10.558    10.572    10.649
excite_mean     0.196     0.202     0.192
fracstop        1.000     1.000     1.000
cjmean          3.041     3.040     3.041

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       181.5     184.3     178.6
kozaiamp        179.9     180.0     179.9