Orbit Fit and Astrometric record for 14UM228

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: 14UM228   
# Created Tue Nov 30 02:12:52 2021
# Orbit generated from Bernstein formalism
# Fitting     29 observations of     29
# Arc:   2.33y
# First observation: 2013/08/09
#  Last observation: 2015/12/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000244   0.049720   0.000014  -0.001843   0.036424   0.000000
# Chi-squared of fit:    21.74 DOF:     52 RMS:  0.15
# Min/Max residuals:    -0.40    0.33
# Exact a, adot, b, bdot, g, gdot:
  2.033890E-05  4.906667E-02 -1.328547E-06 -1.821126E-03  3.631428E-02  8.900781E-04
# Covariance matrix:
  1.8560E-13 -1.7901E-13 -1.1813E-15  2.2038E-15  1.7200E-14 -1.1764E-12
 -1.7901E-13  7.6439E-13  1.5385E-15 -2.3119E-14  3.2038E-13  9.6308E-12
 -1.1813E-15  1.5385E-15  1.6092E-13 -1.2389E-13 -1.6023E-15  4.0929E-14
  2.2038E-15 -2.3119E-14 -1.2389E-13  1.3837E-13 -1.1430E-14 -3.5797E-13
  1.7200E-14  3.2038E-13 -1.6023E-15 -1.1430E-14  2.6743E-13  4.1714E-12
 -1.1764E-12  9.6308E-12  4.0929E-14 -3.5797E-13  4.1714E-12  1.5339E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.532069   27.176087    0.956765    0.026947   -0.339571  2456513.995978
# Heliocentric elements and errors
Epoch:              2456510.5000  =  2013/08/06
Mean Anomaly:          357.66671 +/-     0.033
Argument of Peri:      118.06443 +/-     0.064
Long of Asc Node:      271.51533 +/-     0.005
Inclination:             4.88394 +/-     0.000
Eccentricity:         0.29403343 +/-    0.0000
Semi-Major Axis:     39.48525002 +/-    0.0026
Time of Perihelion: 2457097.8769 +/-       8.3
Perihelion:          27.87526656 +/-    0.0024
Aphelion:            51.09523348 +/-    0.0037
Period (y)              248.1193 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.16051576 +/-    0.0003
Ecliptic Y           11.84516669 +/-    0.0002
Ecliptic Z            2.17592775 +/-    0.0000
Ecliptic XDOT        -0.00162662 +/-    0.0000
Ecliptic YDOT         0.00332554 +/-    0.0000
Ecliptic ZDOT        -0.00013143 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   27.89433973 +/-    0.0003
Geocenter to KBO     27.53737962 +/-    0.0004
# Hcoef: 10.17

The following table shows the complete astrometric record for 14UM228. 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 (14UM228) followed by the observatory code and reference code for the source of the astrometry.

2013 08  09.49520  01 34 09.053  +14 41 27.20  24.6r 14UM228   568  C~2SDg      
2013 08  09.53863  01 34 08.976  +14 41 26.92  24.1r 14UM228   568  C~2SDg      
2013 09  02.41327  01 33 03.775  +14 38 28.30  24.4r 14UM228   568  C~2SDg      
2013 09  02.45665  01 33 03.601  +14 38 27.89  24.0r 14UM228   568  C~2SDg      
2013 09  03.43268  01 32 59.533  +14 38 11.09  24.9r 14UM228   568  C~2SDg      
2013 09  03.47930  01 32 59.315  +14 38 10.33  24.8r 14UM228   568  C~2SDg      
2013 10  08.49207  01 29 43.375  +14 21 46.36  24.4r 14UM228   568  C~2SDg      
2013 12  04.34687  01 24 16.535  +13 45 46.84  24.5r 14UM228   568  C~2SDg      
2013 12  29.29682  01 23 25.437  +13 36 22.45  25.0r 14UM228   568  C~2SDg      
2014 07  26.52194  01 45 09.072  +15 34 06.76  24.5r 14UM228   568  C~2SDg      
2014 07  26.56498  01 45 09.108  +15 34 07.42  24.5r 14UM228   568  C~2SDg      
2014 07  26.60835  01 45 09.143  +15 34 07.94  24.6r 14UM228   568  C~2SDg      
2014 08  24.45776  01 44 43.441  +15 35 55.99  24.6r 14UM228   568  C~2SDg      
2014 08  24.53170  01 44 43.214  +15 35 55.61  24.8r 14UM228   568  C~2SDg      
2014 08  30.43607  01 44 24.783  +15 34 58.40  24.9r 14UM228   568  C~2SDg      
2014 08  30.54438  01 44 24.412  +15 34 57.06  24.9r 14UM228   568  C~2SDg      
2014 09  18.46299  01 43 00.131  +15 29 04.51  24.7r 14UM228   568  C~2SDg      
2014 09  18.50571  01 42 59.892  +15 29 03.59  24.8r 14UM228   568  C~2SDg      
2014 09  23.50400  01 42 32.232  +15 26 51.73  24.4r 14UM228   568  C~2SDg      
2014 10  22.28665  01 39 28.673  +15 10 23.93  24.8r 14UM228   568  C~2SDg      
2014 10  22.33133  01 39 28.350  +15 10 22.63  24.4r 14UM228   568  C~2SDg      
2014 10  22.37555  01 39 28.039  +15 10 20.59  24.5r 14UM228   568  C~2SDg      
2014 10  23.47137  01 39 20.721  +15 09 37.53  24.8r 14UM228   568  C~2SDg      
2014 11  20.21853  01 36 28.818  +14 51 28.33  24.7r 14UM228   568  C~2SDg      
2014 11  20.35900  01 36 28.033  +14 51 23.14  24.5r 14UM228   568  C~2SDg      
2014 11  21.25530  01 36 23.269  +14 50 49.80  24.8r 14UM228   568  C~2SDg      
2014 11  21.42173  01 36 22.353  +14 50 43.84  24.3r 14UM228   568  C~2SDg      
2015 10  12.48210  01 51 56.148  +16 11 40.94        14UM228   568  C~2SDg      
2015 12  07.40375  01 46 21.014  +15 37 13.70  25.0w 14UM228   568  C~2SDg      

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     0.21       0.00     0.11
     2   0.0001     -1.14    -0.16       0.15    -0.14
     3   0.0655   -946.95     0.07     180.61    -0.08
     4   0.0656   -949.45     0.29     181.15     0.15
     5   0.0683  -1010.54     0.01     187.19    -0.04
     6   0.0684  -1013.76    -0.20     187.64     0.08
     7   0.1643  -4022.07     0.14     322.10    -0.30
     8   0.3199  -9245.68    -0.14      92.34    -0.10
     9   0.3882 -10149.96    -0.16    -150.84     0.32
    10   0.9611  10061.57     0.07    -493.69    -0.05
    11   0.9612  10062.29     0.01    -493.26    -0.02
    12   0.9613  10062.95    -0.11    -492.95    -0.12
    13   1.0403   9753.26     0.15    -260.03    -0.19
    14   1.0405   9750.05     0.00    -259.23     0.03
    15   1.0566   9480.19    -0.40    -218.20     0.22
    16   1.0569   9474.70    -0.19    -217.55     0.07
    17   1.1087   8208.59    -0.04    -113.68    -0.07
    18   1.1089   8205.02    -0.07    -113.31     0.09
    19   1.1225   7783.79     0.05     -93.84     0.21
    20   1.2013   4947.78     0.29     -63.58    -0.17
    21   1.2015   4942.95     0.18     -63.11     0.33
    22   1.2016   4938.01    -0.08     -63.39     0.08
    23   1.2046   4823.60    -0.01     -65.38    -0.25
    24   1.2806   2106.86     0.10    -179.40    -0.14
    25   1.2809   2094.37    -0.05    -180.10    -0.05
    26   1.2834   2017.89     0.03    -186.06    -0.11
    27   1.2839   2003.35    -0.08    -186.78     0.15
    28   2.1738  16378.43     0.00    -440.34     0.02
    29   2.3269  11102.71     0.06    -686.56    -0.06

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.

14UM228    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.701    39.716    39.686
ecceobj         0.298     0.298     0.297
incobj          4.888     4.888     4.888
qmin           27.505    27.498    27.518
qmax           52.067    52.125    52.099
amean          39.455    39.455    39.455
amin           38.962    38.964    38.957
amax           40.072    40.074    40.057
emean           0.287     0.287     0.287
emin            0.271     0.270     0.271
emax            0.301     0.302     0.302
imean           6.815     6.846     6.764
imin            6.211     6.316     6.152
imax            7.419     7.475     7.364
excite_mean     0.310     0.310     0.310
fracstop        1.000     1.000     1.000
cjmean          2.940     2.940     2.940

libcent 0       179.6     180.4     180.1
libamp  0        95.9      95.1      98.3
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       173.6     173.4     178.9
kozaiamp        179.9     180.0     180.0