Orbit Fit and Astrometric record for 14UN250

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: 14UN250   
# Created Wed Dec  8 02:12:54 2021
# Orbit generated from Bernstein formalism
# Fitting     24 observations of     24
# Arc:   3.99y
# First observation: 2014/10/23
#  Last observation: 2018/10/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000044   0.025539   0.000010  -0.004123   0.025745   0.000000
# Chi-squared of fit:     9.26 DOF:     42 RMS:  0.11
# Min/Max residuals:    -0.22    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.590525E-05  2.558295E-02 -2.153672E-06 -4.117421E-03  2.573254E-02  1.185367E-03
# Covariance matrix:
  2.3321E-13 -1.4914E-13 -7.2228E-15  1.2111E-14  1.1104E-14 -8.8151E-13
 -1.4914E-13  3.1330E-13  1.4043E-14 -4.4926E-14  2.6898E-13  3.1812E-12
 -7.2228E-15  1.4043E-14  1.9194E-13 -7.6137E-14  7.3834E-16  1.6451E-13
  1.2111E-14 -4.4926E-14 -7.6137E-14  4.9699E-14 -4.6037E-14 -5.2732E-13
  1.1104E-14  2.6898E-13  7.3834E-16 -4.6037E-14  6.0772E-13  3.1648E-12
 -8.8151E-13  3.1812E-12  1.6451E-13 -5.2732E-13  3.1648E-12  3.7338E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -28.233908   38.886293    0.162139   -0.465041   -0.866453  2456953.855358
# Heliocentric elements and errors
Epoch:              2456950.5000  =  2014/10/20
Mean Anomaly:           57.48993 +/-     0.156
Argument of Peri:      190.84678 +/-     0.185
Long of Asc Node:      148.22136 +/-     0.001
Inclination:            28.98936 +/-     0.000
Eccentricity:         0.04378839 +/-    0.0002
Semi-Major Axis:     40.62807329 +/-    0.0039
Time of Perihelion: 2441845.2805 +/-      40.9
Perihelion:          38.84903524 +/-    0.0092
Aphelion:            42.40711135 +/-    0.0093
Period (y)              258.9689 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.51468241 +/-    0.0008
Ecliptic Y           21.98643804 +/-    0.0007
Ecliptic Z          -18.38432938 +/-    0.0006
Ecliptic XDOT        -0.00178805 +/-    0.0000
Ecliptic YDOT         0.00205359 +/-    0.0000
Ecliptic ZDOT        -0.00044551 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.72964601 +/-    0.0007
Geocenter to KBO     38.86130082 +/-    0.0012
# Hcoef:  7.58

The following table shows the complete astrometric record for 14UN250. 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 (14UN250) followed by the observatory code and reference code for the source of the astrometry.

2014 10  23.35458  03 01 37.961  -12 21 31.07  23.1r 14UN250   W84  C~4yUy      
2014 10  23.35458  03 01 37.96   -12 21 31.1   23.8r 14UN250   W84  C~3coQ      
2014 10  23.35594  03 01 37.965  -12 21 31.08  23.6i 14UN250   W84  C~4yUy      
2014 10  29.33865  03 01 08.948  -12 24 33.20  24.0g 14UN250   W84  C~4yUy      
2014 11  03.32573  03 00 44.157  -12 26 46.05  22.9i 14UN250   W84  C~4yUy      
2014 11  03.32573  03 00 44.16   -12 26 46.1   23.2i 14UN250   W84  C~3coQ      
2015 12  17.17492  03 03 17.389  -12 17 34.52  23.9g 14UN250   W84  C~4yUy      
2015 12  17.17492  03 03 17.39   -12 17 34.5   23.9g 14UN250   W84  C~3coQ      
2016 09  24.33743  03 15 25.450  -11 33 04.21  23.4r 14UN250   W84  C~4yUy      
2016 09  24.33743  03 15 25.45   -11 33 04.2   23.6r 14UN250   W84  C~3coQ      
2016 09  25.28379  03 15 22.646  -11 33 46.41  23.8g 14UN250   W84  C~4yUy      
2016 11  10.29386  03 12 03.505  -12 00 12.25  23.6r 14UN250   W84  C~4yUy      
2016 11  10.29386  03 12 03.50   -12 00 12.3   23.8r 14UN250   W84  C~3coQ      
2016 11  10.29523  03 12 03.488  -12 00 12.21  24.3g 14UN250   W84  C~4yUy      
2016 11  22.20715  03 11 03.445  -12 03 12.74  22.9i 14UN250   W84  C~4yUy      
2016 11  22.20715  03 11 03.44   -12 03 12.7   23.0i 14UN250   W84  C~3coQ      
2016 12  23.17814  03 08 47.810  -12 01 27.21  23.7r 14UN250   W84  C~4yUy      
2016 12  23.17814  03 08 47.81   -12 01 27.2   23.9r 14UN250   W84  C~3coQ      
2016 12  23.17951  03 08 47.808  -12 01 27.23  24.3g 14UN250   W84  C~4yUy      
2017 10  29.34346  03 19 00.155  -11 39 49.48  23.6r 14UN250   W84  C~4yUz      
2017 10  29.34483  03 19 00.168  -11 39 49.44  23.7i 14UN250   W84  C~4yUz      
2017 10  29.34620  03 19 00.164  -11 39 49.30  24.0g 14UN250   W84  C~4yUz      
2018 10  19.30647  03 25 41.709  -11 18 23.50  24.0g 14UN250   W84  C~4yUz      
2018 10  20.36891  03 25 37.044  -11 19 01.10  23.5i 14UN250   W84  C~4yUz      

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    -0.08
     2   0.0000      0.02    -0.01       0.02    -0.05
     3   0.0000      0.08     0.14      -0.00    -0.07
     4   0.0164   -460.85    -0.11     -38.08     0.03
     5   0.0300   -847.36    -0.08     -49.29     0.09
     6   0.0300   -847.38    -0.10     -49.22     0.15
     7   1.1494   1456.75     0.24    -238.60    -0.14
     8   1.1494   1456.77     0.26    -238.58    -0.12
     9   1.9219  12446.27     0.08   -1171.85     0.02
    10   1.9219  12446.27     0.07   -1171.85     0.01
    11   1.9245  12393.29     0.13   -1198.20    -0.01
    12   2.0505   9102.03    -0.19   -1739.42    -0.03
    13   2.0505   9102.12    -0.10   -1739.40    -0.01
    14   2.0505   9101.89    -0.22   -1739.28     0.10
    15   2.0831   8208.63    -0.01   -1622.86     0.11
    16   2.0831   8208.57    -0.06   -1622.80     0.17
    17   2.1679   6358.12    -0.05    -877.21    -0.00
    18   2.1679   6358.11    -0.06    -877.22    -0.01
    19   2.1679   6358.08    -0.03    -877.23    -0.07
    20   3.0171  15303.49    -0.18   -2600.72    -0.06
    21   3.0171  15303.68     0.12   -2600.75    -0.08
    22   3.0171  15303.67     0.22   -2600.60     0.08
    23   3.9889  21345.04    -0.09   -3371.19     0.04
    24   3.9918  21266.94     0.07   -3383.45    -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.

14UN250    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.932    40.944    40.920
ecceobj         0.051     0.051     0.051
incobj         28.945    28.945    28.945
qmin           38.043    37.999    38.038
qmax           43.417    43.455    43.361
amean          40.636    40.647    40.625
amin           40.329    40.344    40.310
amax           40.945    40.967    40.951
emean           0.048     0.049     0.048
emin            0.037     0.037     0.037
emax            0.061     0.061     0.060
imean          27.919    27.916    27.921
imin           27.534    27.536    27.540
imax           28.279    28.284    28.285
excite_mean     0.471     0.471     0.471
fracstop        1.000     1.000     1.000
cjmean          2.791     2.791     2.791

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       192.5     191.2     191.1
kozaiamp        180.0     180.0     180.0