Orbit Fit and Astrometric record for 15UH67

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: 15UH67    
# Created Thu Dec  9 02:13:32 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     22 observations of     22
# Arc:   2.11y
# First observation: 2014/09/17
#  Last observation: 2016/10/25
# Chi-squared of fit:    80.43 DOF:     38 RMS:  0.34
# Min/Max residuals:    -1.13    0.55
# Exact a, adot, b, bdot, g, gdot:
  3.794174E-05  4.160666E-01  1.508531E-05  1.653873E-01  1.728774E-01 -1.841152E-02
# Covariance matrix:
  6.1007E-13 -5.2824E-13  9.6472E-14 -1.6054E-13  1.5599E-13 -3.2185E-13
 -5.2824E-13  4.7640E-13 -8.0464E-14  1.3363E-13 -1.1278E-13  2.6901E-13
  9.6472E-14 -8.0464E-14  2.7498E-13 -2.5874E-13  5.0200E-14 -8.9774E-14
 -1.6054E-13  1.3363E-13 -2.5874E-13  2.6951E-13 -8.4234E-14  1.4972E-13
  1.5599E-13 -1.1278E-13  5.0200E-14 -8.4234E-14  1.2606E-13 -1.6603E-13
 -3.2185E-13  2.6901E-13 -8.9774E-14  1.4972E-13 -1.6603E-13  2.9883E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
  -20.600109    4.276177    0.180619   -0.348694   -0.928078  2456917.685975
# Heliocentric elements and errors
Epoch:              2456918.5000  =  2014/09/18
Mean Anomaly:          344.54792 +/-     0.020
Argument of Peri:      339.90796 +/-     0.000
Long of Asc Node:       40.50516 +/-     0.000
Inclination:            27.38343 +/-     0.000
Eccentricity:         0.15012717 +/-    0.0000
Semi-Major Axis:      7.84006418 +/-    0.0000
Time of Perihelion: 2457262.6616 +/-       0.4
Perihelion:           6.66305752 +/-    0.0001
Aphelion:             9.01707084 +/-    0.0001
Period (y)               21.9527 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            6.39927130 +/-    0.0000
Ecliptic Y            0.29913645 +/-    0.0000
Ecliptic Z           -2.03515141 +/-    0.0000
Ecliptic XDOT         0.00015079 +/-    0.0000
Ecliptic YDOT         0.00661472 +/-    0.0000
Ecliptic ZDOT         0.00255446 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    6.72176645 +/-    0.0000
Geocenter to KBO      5.78449298 +/-    0.0000
# Hcoef: 13.35

The following table shows the complete astrometric record for 15UH67. 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 (15UH67) followed by the observatory code and reference code for the source of the astrometry.

2014 09  17.185197 00 49 18.56   -17 09 37.2         15UH67    W84  C~3xrk      
2014 09  17.260718 00 49 16.63   -17 09 44.8         15UH67    W84  C~3xrk      
2015 09  04.320637 02 03 37.10   +01 56 49.7   21.4i 15UH67    W84  C~3xrk      
2015 09  04.322899 02 03 37.09   +01 56 49.4         15UH67    W84  C~3xrk      
2015 10  19.39280  01 47 18.355  +01 25 02.54  21.6w 15UH67    F51  C~1bSZ      
2015 10  19.40422  01 47 18.026  +01 25 02.53  21.9w 15UH67    F51  C~1bSZ      
2015 10  19.41572  01 47 17.690  +01 25 02.13  21.7w 15UH67    F51  C~1bSZ      
2015 10  22.34051  01 45 57.56   +01 23 31.8         15UH67    291  C~1bSZ      
2015 10  22.35366  01 45 57.17   +01 23 32.6         15UH67    291  C~1bSZ      
2015 10  22.36683  01 45 56.78   +01 23 32.0         15UH67    291  C~1bSZ      
2015 10  23.15451  01 45 35.29   +01 23 11.2         15UH67    291  C~1bSZ      
2015 10  23.16683  01 45 34.96   +01 23 10.1   21.6R 15UH67    291  C~1bSZ      
2015 10  23.17919  01 45 34.66   +01 23 10.7   21.6R 15UH67    291  C~1bSZ      
2015 12  28.086806 01 26 52.17   +02 35 37.6   21.4i 15UH67    W84  C~3xrk      
2015 12  28.140197 01 26 52.15   +02 35 46.6   21.3i 15UH67    W84  C~3xrk      
2015 12  28.140868 01 26 52.14   +02 35 46.8         15UH67    W84  C~3xrk      
2016 09  07.463665 03 12 14.40   +19 20 52.5         15UH67    568  C~3xrk      
2016 09  07.509638 03 12 14.17   +19 20 57.5   21.6i 15UH67    568  C~3xrk      
2016 10  25.51000  02 57 58.269  +20 07 01.84  21.5w 15UH67    F51  C~3xrk      
2016 10  25.52399  02 57 57.870  +20 07 01.73  21.6w 15UH67    F51  C~3xrk      
2016 10  25.53790  02 57 57.464  +20 07 01.94  21.5w 15UH67    F51  C~3xrk      
2016 10  25.55194  02 57 57.070  +20 07 01.99  21.6w 15UH67    F51  C~3xrk      

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     0.02       0.00     0.02
     2   0.0002      0.00     0.05       0.00    -0.06
     3   0.9641      0.00     0.27       0.00     0.35
     4   0.9641      0.00     0.55       0.00     0.11
     5   1.0875      0.00     0.16       0.00     0.16
     6   1.0875      0.00     0.02       0.00     0.52
     7   1.0876      0.00    -0.19       0.00     0.49
     8   1.0956      0.00     0.30       0.00    -1.13
     9   1.0956      0.00    -0.04       0.00     0.04
    10   1.0956      0.00    -0.38       0.00    -0.20
    11   1.0978      0.00    -0.66       0.00     0.24
    12   1.0978      0.00    -0.48       0.00    -0.54
    13   1.0979      0.00     0.17       0.00     0.38
    14   1.2783      0.00     0.01       0.00    -0.13
    15   1.2785      0.00     0.26       0.00    -0.18
    16   1.2785      0.00     0.12       0.00    -0.09
    17   1.9748      0.00    -0.53       0.00    -0.14
    18   1.9749      0.00    -0.52       0.00    -0.08
    19   2.1063      0.00     0.30       0.00     0.26
    20   2.1063      0.00     0.30       0.00    -0.00
    21   2.1064      0.00     0.16       0.00     0.06
    22   2.1064      0.00     0.25       0.00    -0.03

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.

15UH67    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj         7.849     7.849     7.849
ecceobj         0.151     0.151     0.151
incobj         27.385    27.385    27.385
qmin            5.833     5.945     5.780
qmax            9.592     9.327     9.492
amean           7.742     7.662     7.686
amin            7.572     7.191     7.250
amax            7.949     8.004     8.153
emean           0.191     0.109     0.188
emin            0.135     0.052     0.151
emax            0.235     0.201     0.229
imean          26.793    25.936    26.703
imin           25.945    24.765    26.184
imax           27.488    27.324    27.067
excite_mean     0.491     0.452     0.488
fracstop        0.002     0.010     0.001
cjmean          4.779     4.834     4.802

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       163.5     188.5     109.1
kozaiamp        167.2     178.4     167.2