Orbit Fit and Astrometric record for 14QU495

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: 14QU495   
# Created Sat Dec  4 02:12:37 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     43 observations of     43
# Arc:   5.16y
# First observation: 2013/10/03
#  Last observation: 2018/11/29
# Chi-squared of fit:    11.24 DOF:     80 RMS:  0.09
# Min/Max residuals:    -0.24    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.886885E-05  3.481529E-02 -6.505939E-06 -1.206978E-02  3.080850E-02  5.063551E-03
# Covariance matrix:
  3.5277E-13 -3.1816E-13 -8.7695E-14  1.0256E-13 -8.1684E-14 -1.7794E-12
 -3.1816E-13  3.6371E-13  1.0899E-13 -1.2820E-13  1.1783E-13  2.2244E-12
 -8.7695E-14  1.0899E-13  1.6876E-13 -8.5789E-14  3.0035E-14  7.1120E-13
  1.0256E-13 -1.2820E-13 -8.5789E-14  6.8398E-14 -4.0056E-14 -8.3328E-13
 -8.1684E-14  1.1783E-13  3.0035E-14 -4.0056E-14  1.3809E-13  6.9644E-13
 -1.7794E-12  2.2244E-12  7.1120E-13 -8.3328E-13  6.9644E-13  1.4458E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -9.648201   23.046319    0.230066   -0.163120   -0.960120  2456568.642258
# Heliocentric elements and errors
Epoch:              2456568.5000  =  2013/10/03
Mean Anomaly:           20.61987 +/-     0.010
Argument of Peri:      170.85266 +/-     0.020
Long of Asc Node:      177.61285 +/-     0.000
Inclination:            21.29646 +/-     0.000
Eccentricity:         0.26454495 +/-    0.0001
Semi-Major Axis:     43.64806853 +/-    0.0038
Time of Perihelion: 2450535.5537 +/-       3.0
Perihelion:          32.10119244 +/-    0.0050
Aphelion:            55.19494462 +/-    0.0064
Period (y)              288.3738 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.43104892 +/-    0.0004
Ecliptic Y           12.69952846 +/-    0.0002
Ecliptic Z           -5.44022687 +/-    0.0001
Ecliptic XDOT        -0.00097457 +/-    0.0000
Ecliptic YDOT         0.00294893 +/-    0.0000
Ecliptic ZDOT        -0.00113271 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.42031747 +/-    0.0003
Geocenter to KBO     32.45851606 +/-    0.0004
# Hcoef:  7.85

The following table shows the complete astrometric record for 14QU495. 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 (14QU495) followed by the observatory code and reference code for the source of the astrometry.

2013 10  03.14148  01 39 31.786  -00 00 51.78  23.1g 14QU495   W84  C~4yTz      
2013 10  04.19302  01 39 26.378  -00 01 35.68  24.0g 14QU495   W84  C~4yTz      
2014 08  18.36136  01 50 39.208  +00 34 36.77  23.1i 14QU495   W84  C~4yTz      
2014 08  18.36136  01 50 39.21   +00 34 36.8   23.2i 14QU495   W84  C~3cnP      
2014 10  02.283275 01 48 01.11   +00 05 01.8   22.8i 14QU495   W84  C~35bt      
2014 10  02.28380  01 48 01.108  +00 05 01.82  22.7i 14QU495   W84  C~4yTz      
2014 10  03.279699 01 47 56.08   +00 04 20.4   23.2r 14QU495   W84  C~35bt      
2014 10  03.28022  01 47 56.085  +00 04 20.45  23.3r 14QU495   W84  C~4yTz      
2014 10  03.32771  01 47 55.850  +00 04 18.25  23.2g 14QU495   W84  C~4yTz      
2014 10  03.32771  01 47 55.85   +00 04 18.3   23.5g 14QU495   W84  C~3cnP      
2014 10  29.25559  01 45 37.335  -00 12 22.37  22.9i 14QU495   W84  C~4yTz      
2014 10  29.25559  01 45 37.34   -00 12 22.4   22.8i 14QU495   W84  C~3cnP      
2014 11  16.15607  01 44 05.685  -00 21 09.88  23.1r 14QU495   W84  C~4yTz      
2014 11  16.15607  01 44 05.69   -00 21 09.9   23.2r 14QU495   W84  C~3cnP      
2014 11  28.12559  01 43 13.170  -00 25 13.10  21.6z 14QU495   W84  C~4yTz      
2014 12  12.05597  01 42 25.894  -00 27 47.90  23.1r 14QU495   W84  C~4yTz      
2014 12  12.05597  01 42 25.89   -00 27 47.9   23.0r 14QU495   W84  C~3cnP      
2014 12  16.10942  01 42 15.454  -00 28 05.78  23.1z 14QU495   W84  C~4yTz      
2015 08  24.370729 01 58 40.45   +00 36 07.3   23.4r 14QU495   W84  C~35bt      
2015 08  24.37126  01 58 40.461  +00 36 07.15  23.4r 14QU495   W84  C~4yTz      
2015 08  24.372106 01 58 40.44   +00 36 07.3   23.0i 14QU495   W84  C~35bt      
2015 08  24.37263  01 58 40.448  +00 36 07.17  22.9i 14QU495   W84  C~4yTz      
2015 08  24.37402  01 58 40.460  +00 36 07.10  23.8g 14QU495   W84  C~4yTz      
2015 12  18.13287  01 50 23.545  -00 23 05.06  23.3i 14QU495   W84  C~4yTz      
2016 01  12.06145  01 49 56.663  -00 19 53.95  23.4r 14QU495   W84  C~4yTz      
2016 01  12.06145  01 49 56.66   -00 19 53.9   23.4r 14QU495   W84  C~3cnP      
2016 09  09.39885  02 06 04.083  +00 30 17.61  22.7i 14QU495   W84  C~4yTz      
2016 09  09.39885  02 06 04.08   +00 30 17.6   22.8i 14QU495   W84  C~3cnP      
2016 09  10.29392  02 06 01.099  +00 29 41.73  23.2r 14QU495   W84  C~4yTz      
2016 09  10.29392  02 06 01.10   +00 29 41.7   23.2r 14QU495   W84  C~3cnP      
2016 09  10.29529  02 06 01.097  +00 29 41.76  23.9g 14QU495   W84  C~4yTz      
2016 09  10.29529  02 06 01.10   +00 29 41.7   24.3g 14QU495   W84  C~3cnP      
2016 11  28.12586  01 59 37.968  -00 15 12.66  23.9g 14QU495   W84  C~4yTz      
2016 11  28.15220  01 59 37.852  -00 15 13.06  22.3z 14QU495   W84  C~4yTz      
2017 10  29.261563 02 10 16.48   +00 02 32.8   22.9r 14QU495   W84  C~35bt      
2017 10  29.26209  02 10 16.484  +00 02 32.77  22.8r 14QU495   W84  C~4yTz      
2017 10  29.262940 02 10 16.48   +00 02 32.9   23.5g 14QU495   W84  C~35bt      
2017 10  29.26346  02 10 16.478  +00 02 32.81  23.3g 14QU495   W84  C~4yTz      
2017 10  30.21674  02 10 11.290  +00 02 00.96  22.8z 14QU495   W84  C~4yTz      
2017 11  16.167674 02 08 41.64   -00 06 08.3   23.0i 14QU495   W84  C~35bt      
2017 11  16.16821  02 08 41.645  -00 06 08.29  22.5i 14QU495   W84  C~4yTz      
2017 11  16.16958  02 08 41.628  -00 06 08.52  24.0g 14QU495   W84  C~4yTz      
2018 11  29.18186  02 15 42.137  -00 05 26.54  23.1r 14QU495   W84  C~4yTz      

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    -0.22       0.00    -0.02
     2   0.0029      0.00     0.20       0.00     0.02
     3   0.8740      0.00    -0.05       0.00    -0.15
     4   0.8740      0.00    -0.02       0.00    -0.12
     5   0.9970      0.00     0.02       0.00     0.02
     6   0.9970      0.00     0.03       0.00     0.06
     7   0.9997      0.00    -0.08       0.00     0.12
     8   0.9997      0.00     0.04       0.00     0.19
     9   0.9998      0.00     0.18       0.00     0.02
    10   0.9998      0.00     0.18       0.00    -0.03
    11   1.0708      0.00    -0.02       0.00    -0.10
    12   1.0708      0.00    -0.09       0.00    -0.07
    13   1.1198      0.00     0.10       0.00    -0.06
    14   1.1198      0.00     0.02       0.00    -0.04
    15   1.1526      0.00    -0.14       0.00     0.18
    16   1.1907      0.00    -0.07       0.00     0.02
    17   1.1907      0.00    -0.01       0.00     0.02
    18   1.2018      0.00     0.06       0.00    -0.16
    19   1.8897      0.00    -0.13       0.00     0.08
    20   1.8897      0.00     0.05       0.00    -0.05
    21   1.8897      0.00    -0.24       0.00     0.13
    22   1.8897      0.00    -0.10       0.00     0.02
    23   1.8898      0.00     0.12       0.00    -0.00
    24   2.2067      0.00     0.05       0.00     0.02
    25   2.2749      0.00    -0.02       0.00     0.09
    26   2.2749      0.00     0.02       0.00     0.04
    27   2.9357      0.00     0.07       0.00     0.01
    28   2.9357      0.00     0.12       0.00     0.02
    29   2.9381      0.00     0.04       0.00    -0.10
    30   2.9381      0.00     0.02       0.00    -0.07
    31   2.9381      0.00     0.06       0.00     0.02
    32   2.9381      0.00     0.11       0.00    -0.04
    33   3.1540      0.00     0.01       0.00    -0.04
    34   3.1540      0.00    -0.01       0.00    -0.02
    35   4.0715      0.00    -0.12       0.00     0.00
    36   4.0715      0.00    -0.01       0.00    -0.01
    37   4.0715      0.00    -0.00       0.00     0.15
    38   4.0715      0.00     0.01       0.00     0.08
    39   4.0741      0.00    -0.14       0.00     0.04
    40   4.1205      0.00     0.01       0.00     0.01
    41   4.1205      0.00     0.13       0.00     0.04
    42   4.1205      0.00    -0.02       0.00    -0.16
    43   5.1555      0.00     0.05       0.00    -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.

14QU495    quality flag:3

Type:         7:4EEE    7:4EEE    7:4EEE

axisobj        43.935    43.935    43.935
ecceobj         0.270     0.270     0.270
incobj         21.245    21.245    21.245
qmin           31.546    31.671    31.544
qmax           56.643    56.481    56.613
amean          43.725    43.725    43.725
amin           43.236    43.224    43.225
amax           44.297    44.309    44.304
emean           0.249     0.249     0.251
emin            0.213     0.213     0.213
emax            0.279     0.276     0.279
imean          21.641    21.656    21.606
imin           20.584    20.577    20.570
imax           22.890    22.858    22.855
excite_mean     0.446     0.446     0.446
fracstop        1.000     1.000     1.000
cjmean          2.857     2.857     2.857

libcent 0       175.2     177.3     175.3
libamp  0       138.3     140.1     138.6
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       207.7     201.1     205.1
kozaiamp        180.0     180.0     180.0