Orbit Fit and Astrometric record for 15UK84

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: 15UK84    
# Created Sat Nov 27 02:13:40 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     62 observations of     62
# Arc:   7.11y
# First observation: 2014/10/03
#  Last observation: 2021/11/11
# Chi-squared of fit:    15.56 DOF:    118 RMS:  0.09
# Min/Max residuals:    -0.24    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.637157E-05  2.732507E-02 -5.022802E-06 -8.267046E-03  2.609924E-02  3.653468E-03
# Covariance matrix:
  1.0346E-13 -5.8405E-14 -1.3765E-14  1.3769E-14  2.0192E-14 -2.7349E-13
 -5.8405E-14  6.2555E-14  1.4568E-14 -1.6629E-14  3.3052E-14  3.2251E-13
 -1.3765E-14  1.4568E-14  6.1823E-14 -2.3075E-14  1.4347E-15  9.4083E-14
  1.3769E-14 -1.6629E-14 -2.3075E-14  1.5390E-14 -7.3509E-15 -1.0400E-13
  2.0192E-14  3.3052E-14  1.4347E-15 -7.3509E-15  1.5440E-13  1.2357E-13
 -2.7349E-13  3.2251E-13  9.4083E-14 -1.0400E-13  1.2357E-13  2.0282E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -17.078330   19.818061    0.176698   -0.289763   -0.943726  2456933.760838
# Heliocentric elements and errors
Epoch:              2456934.5000  =  2014/10/04
Mean Anomaly:           22.66268 +/-     0.007
Argument of Peri:      188.80302 +/-     0.012
Long of Asc Node:      156.39254 +/-     0.000
Inclination:            23.62316 +/-     0.000
Eccentricity:         0.23742705 +/-    0.0001
Semi-Major Axis:     49.50691516 +/-    0.0041
Time of Perihelion: 2448924.9886 +/-       2.6
Perihelion:          37.75263427 +/-    0.0043
Aphelion:            61.26119604 +/-    0.0059
Period (y)              348.3429 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.44247026 +/-    0.0005
Ecliptic Y           12.58772608 +/-    0.0002
Ecliptic Z          -11.25261115 +/-    0.0002
Ecliptic XDOT        -0.00087136 +/-    0.0000
Ecliptic YDOT         0.00272988 +/-    0.0000
Ecliptic ZDOT        -0.00094143 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.25856081 +/-    0.0005
Geocenter to KBO     38.31524244 +/-    0.0006
# Hcoef:  6.57

The following table shows the complete astrometric record for 15UK84. 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 (15UK84) followed by the observatory code and reference code for the source of the astrometry.

2014 10  03.26006  01 38 54.729  -08 04 42.98  21.5z 15UK84    W84  C~4yYc      
2014 10  03.26006  01 38 54.73   -08 04 43.0   21.7z 15UK84    W84  C~3cu9      
2014 10  03.26117  01 38 54.708  -08 04 42.95  20.7Y 15UK84    W84  C~4yYc      
2014 10  03.26228  01 38 54.722  -08 04 43.16  21.9i 15UK84    W84  C~4yYc      
2014 10  03.26228  01 38 54.72   -08 04 43.2   21.9i 15UK84    W84  C~3cu9      
2014 10  14.22604  01 38 03.924  -08 11 06.82  22.9i 15UK84    W84  C~4yYc      
2014 10  14.22604  01 38 03.92   -08 11 06.8   23.0i 15UK84    W84  C~3cu9      
2014 12  13.14801  01 34 06.871  -08 25 17.64  23.2g 15UK84    W84  C~4yYc      
2014 12  13.14801  01 34 06.87   -08 25 17.7   23.3g 15UK84    W84  C~3cu9      
2014 12  24.12101  01 33 48.003  -08 23 12.34  22.8r 15UK84    W84  C~4yYc      
2015 08  18.40912  01 47 54.168  -07 24 57.62  22.3r 15UK84    W84  C~4yYc      
2015 08  18.41048  01 47 54.160  -07 24 57.55  22.5g 15UK84    W84  C~4yYc      
2015 09  23.24934  01 46 11.211  -07 48 52.37  22.3z 15UK84    W84  C~4yYc      
2015 09  23.24934  01 46 11.21   -07 48 52.4   22.3z 15UK84    W84  C~3cu9      
2015 10  17.18378  01 44 24.29   -08 03 20.6   22.0i 15UK84    W84  C~3cu9      
2015 10  17.18514  01 44 24.287  -08 03 20.78  22.3r 15UK84    W84  C~4yYc      
2015 10  17.18514  01 44 24.29   -08 03 20.8   22.4r 15UK84    W84  C~3cu9      
2015 10  23.19510  01 43 55.718  -08 06 22.30  22.2z 15UK84    W84  C~4yYc      
2015 11  01.21126  01 43 13.214  -08 10 17.79  22.1z 15UK84    W84  C~4yYc      
2015 11  01.21126  01 43 13.21   -08 10 17.8   22.3z 15UK84    W84  C~3cu9      
2015 11  15.17967  01 42 10.916  -08 14 41.37  22.0z 15UK84    W84  C~4yYc      
2015 11  15.17967  01 42 10.92   -08 14 41.4   22.1z 15UK84    W84  C~3cu9      
2015 11  15.18103  01 42 10.913  -08 14 41.44  22.4i 15UK84    W84  C~4yYc      
2015 11  15.18103  01 42 10.91   -08 14 41.4   22.4i 15UK84    W84  C~3cu9      
2015 11  15.18241  01 42 10.905  -08 14 41.51  22.6r 15UK84    W84  C~4yYc      
2015 11  15.18241  01 42 10.90   -08 14 41.5   22.7r 15UK84    W84  C~3cu9      
2015 11  15.18378  01 42 10.905  -08 14 41.45  23.0g 15UK84    W84  C~4yYc      
2015 11  15.18378  01 42 10.90   -08 14 41.4   23.2g 15UK84    W84  C~3cu9      
2015 11  20.12503  01 41 50.703  -08 15 42.18  22.3z 15UK84    W84  C~4yYc      
2015 11  20.12503  01 41 50.70   -08 15 42.2   22.5z 15UK84    W84  C~3cu9      
2016 09  14.28589  01 53 10.366  -07 33 48.93  21.9z 15UK84    W84  C~4yYc      
2016 09  14.28589  01 53 10.36   -07 33 48.9   22.0z 15UK84    W84  C~3cu9      
2016 10  03.25696  01 51 54.660  -07 46 12.96  22.0i 15UK84    W84  C~4yYc      
2016 10  03.25696  01 51 54.66   -07 46 13.0   22.2i 15UK84    W84  C~3cu9      
2016 10  03.258333 01 51 54.65   -07 46 12.7   22.6r 15UK84    W84  C~2Ckn      
2016 10  03.259711 01 51 54.63   -07 46 12.8   23.1g 15UK84    W84  C~2Ckn      
2016 10  03.25972  01 51 54.647  -07 46 13.02  23.1g 15UK84    W84  C~4yYc      
2016 10  22.28291  01 50 26.385  -07 56 47.32  22.2i 15UK84    W84  C~4yYc      
2016 10  22.28291  01 50 26.38   -07 56 47.4   22.5i 15UK84    W84  C~3cu9      
2016 10  22.28649  01 50 26.36   -07 56 47.6   22.7i 15UK84    W84  C~3cu9      
2016 10  22.28786  01 50 26.353  -07 56 47.69  22.4z 15UK84    W84  C~4yYc      
2016 10  22.28786  01 50 26.35   -07 56 47.7   22.2z 15UK84    W84  C~3cu9      
2016 10  23.201389 01 50 22.01   -07 57 13.7   22.7r 15UK84    W84  C~2Ckn      
2016 10  23.20140  01 50 22.017  -07 57 13.89  22.6r 15UK84    W84  C~4yYc      
2016 10  23.20277  01 50 22.017  -07 57 13.97  23.0g 15UK84    W84  C~4yYc      
2016 10  23.20277  01 50 22.02   -07 57 14.0   23.3g 15UK84    W84  C~3cu9      
2016 10  23.20414  01 50 22.005  -07 57 14.00  22.6r 15UK84    W84  C~4yYc      
2016 10  23.20414  01 50 22.01   -07 57 14.0   22.7r 15UK84    W84  C~3cu9      
2016 10  23.20551  01 50 21.995  -07 57 14.00  23.3g 15UK84    W84  C~4yYc      
2016 10  23.20551  01 50 22.00   -07 57 14.0   23.4g 15UK84    W84  C~3cu9      
2016 12  04.05703  01 47 26.042  -08 07 39.64  22.3z 15UK84    W84  C~4yYc      
2017 11  16.12483  01 54 59.533  -07 55 56.48  22.5r 15UK84    W84  C~4yYc      
2017 11  16.12620  01 54 59.523  -07 55 56.47  23.0g 15UK84    W84  C~4yYc      
2017 12  07.15681  01 53 41.033  -07 58 02.03  22.2Y 15UK84    W84  C~4yYc      
2017 12  22.11777  01 53 03.952  -07 56 09.57  22.6r 15UK84    W84  C~4yYc      
2017 12  22.11915  01 53 03.948  -07 56 09.56  23.3g 15UK84    W84  C~4yYc      
2017 12  25.11530  01 52 58.815  -07 55 27.24  22.6z 15UK84    W84  C~4yYc      
2018 11  30.11232  02 00 26.857  -07 48 00.29  22.7r 15UK84    W84  C~4yYc      
2018 11  30.11375  02 00 26.856  -07 48 00.26  23.2g 15UK84    W84  C~4yYc      
2021 11  11.356399 02 20 34.881  -07 12 48.52  23.0w 15UK84    F51  C~5BaV      
2021 11  11.381875 02 20 34.776  -07 12 48.52  22.5w 15UK84    F51  C~5BaV      
2021 11  11.394587 02 20 34.711  -07 12 48.96  22.6w 15UK84    F51  C~5BaV      

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     0.03       0.00     0.02
     2   0.0000      0.00     0.02       0.00     0.04
     3   0.0000      0.00    -0.22       0.00     0.11
     4   0.0000      0.00     0.07       0.00    -0.06
     5   0.0000      0.00     0.04       0.00    -0.10
     6   0.0300      0.00     0.07       0.00     0.10
     7   0.0300      0.00     0.01       0.00     0.12
     8   0.1941      0.00     0.13       0.00    -0.11
     9   0.1941      0.00     0.11       0.00    -0.17
    10   0.2241      0.00     0.01       0.00    -0.03
    11   0.8738      0.00    -0.01       0.00     0.09
    12   0.8738      0.00    -0.10       0.00     0.21
    13   0.9719      0.00    -0.02       0.00     0.12
    14   0.9719      0.00    -0.01       0.00     0.15
    15   1.0374      0.00    -0.06       0.00     0.08
    16   1.0374      0.00     0.04       0.00    -0.08
    17   1.0374      0.00    -0.01       0.00    -0.06
    18   1.0539      0.00    -0.12       0.00     0.03
    19   1.0786      0.00    -0.05       0.00    -0.05
    20   1.0786      0.00     0.01       0.00    -0.04
    21   1.1168      0.00     0.06       0.00    -0.03
    22   1.1168      0.00    -0.00       0.00     0.00
    23   1.1168      0.00    -0.00       0.00    -0.01
    24   1.1168      0.00     0.04       0.00    -0.05
    25   1.1168      0.00    -0.06       0.00    -0.09
    26   1.1168      0.00     0.01       0.00    -0.10
    27   1.1168      0.00     0.02       0.00     0.03
    28   1.1168      0.00     0.10       0.00    -0.02
    29   1.1304      0.00    -0.07       0.00    -0.09
    30   1.1304      0.00    -0.03       0.00    -0.07
    31   1.9494      0.00     0.06       0.00     0.17
    32   1.9494      0.00    -0.03       0.00     0.20
    33   2.0014      0.00     0.07       0.00    -0.14
    34   2.0014      0.00     0.07       0.00    -0.10
    35   2.0014      0.00     0.02       0.00     0.21
    36   2.0014      0.00    -0.19       0.00     0.16
    37   2.0014      0.00     0.06       0.00    -0.06
    38   2.0535      0.00    -0.01       0.00     0.07
    39   2.0535      0.00     0.06       0.00     0.15
    40   2.0535      0.00    -0.05       0.00    -0.03
    41   2.0535      0.00    -0.10       0.00    -0.09
    42   2.0535      0.00    -0.06       0.00    -0.08
    43   2.0560      0.00    -0.12       0.00     0.18
    44   2.0560      0.00    -0.02       0.00    -0.01
    45   2.0560      0.00     0.13       0.00    -0.08
    46   2.0560      0.00     0.08       0.00    -0.05
    47   2.0560      0.00     0.08       0.00    -0.05
    48   2.0560      0.00     0.00       0.00    -0.05
    49   2.0560      0.00     0.03       0.00    -0.01
    50   2.0560      0.00    -0.05       0.00    -0.01
    51   2.1706      0.00     0.13       0.00    -0.08
    52   3.1208      0.00     0.10       0.00    -0.02
    53   3.1208      0.00     0.04       0.00     0.01
    54   3.1784      0.00     0.10       0.00     0.03
    55   3.2193      0.00     0.03       0.00    -0.01
    56   3.2193      0.00     0.01       0.00    -0.01
    57   3.2275      0.00    -0.07       0.00     0.04
    58   4.1584      0.00    -0.02       0.00    -0.06
    59   4.1584      0.00     0.04       0.00    -0.02
    60   7.1077      0.00    -0.14       0.00    -0.24
    61   7.1078      0.00     0.09       0.00     0.22
    62   7.1078      0.00     0.01       0.00     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.

15UK84    quality flag:2

Type:       SCATNEAR  SCATNEAR  SCATEXTD

axisobj        50.034    50.034    50.034
ecceobj         0.246     0.246     0.246
incobj         23.558    23.558    23.558
qmin           36.353    36.367    36.377
qmax           63.411    63.378    63.450
amean          49.615    49.605    49.603
amin           49.152    49.147    49.158
amax           50.156    50.153    50.145
emean           0.248     0.248     0.248
emin            0.231     0.231     0.231
emax            0.265     0.265     0.265
imean          22.337    22.337    22.335
imin           21.785    21.765    21.770
imax           22.781    22.787    22.783
excite_mean     0.454     0.454     0.454
fracstop        1.000     1.000     1.000
cjmean          2.907     2.907     2.907

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       192.3     193.0     193.1
kozaiamp        180.0     180.0     180.0