Orbit Fit and Astrometric record for 16TT94

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: 16TT94    
# Created Sat Nov 27 02:14:04 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     44 observations of     44
# Arc:   5.85y
# First observation: 2015/01/09
#  Last observation: 2020/11/14
# Chi-squared of fit:    39.90 DOF:     82 RMS:  0.17
# Min/Max residuals:    -0.66    0.73
# Exact a, adot, b, bdot, g, gdot:
  1.717002E-05  2.767538E-02  1.206912E-06  7.597871E-04  2.622619E-02  3.217893E-03
# Covariance matrix:
  1.2034E-13 -9.7842E-14 -1.9125E-15  1.3810E-15 -2.2365E-14 -5.2220E-13
 -9.7842E-14  1.6205E-13 -3.2333E-15 -1.0445E-14 -3.8845E-14  1.0132E-12
 -1.9125E-15 -3.2333E-15  8.0029E-14 -2.8564E-14  1.6321E-14 -9.7170E-15
  1.3810E-15 -1.0445E-14 -2.8564E-14  2.3258E-14  1.9054E-14 -6.0881E-14
 -2.2365E-14 -3.8845E-14  1.6321E-14  1.9054E-14  1.9336E-13 -1.1913E-13
 -5.2220E-13  1.0132E-12 -9.7170E-15 -6.0881E-14 -1.1913E-13  7.4206E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -31.629416   18.873980   -0.981601   -0.006925   -0.011620  2457031.554088
# Heliocentric elements and errors
Epoch:              2457032.5000  =  2015/01/10
Mean Anomaly:           49.61490 +/-     0.014
Argument of Peri:      207.98838 +/-     0.018
Long of Asc Node:      105.97356 +/-     0.001
Inclination:            31.69283 +/-     0.000
Eccentricity:         0.16472635 +/-    0.0001
Semi-Major Axis:     41.84786366 +/-    0.0044
Time of Perihelion: 2443404.9432 +/-       4.4
Perihelion:          34.95441785 +/-    0.0060
Aphelion:            48.74130946 +/-    0.0070
Period (y)              270.7186 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.41252614 +/-    0.0005
Ecliptic Y           11.43697279 +/-    0.0002
Ecliptic Z          -19.99618542 +/-    0.0003
Ecliptic XDOT        -0.00062852 +/-    0.0000
Ecliptic YDOT         0.00283449 +/-    0.0000
Ecliptic ZDOT        -0.00010854 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.15189030 +/-    0.0004
Geocenter to KBO     38.12980830 +/-    0.0006
# Hcoef:  6.63

The following table shows the complete astrometric record for 16TT94. 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 (16TT94) followed by the observatory code and reference code for the source of the astrometry.

2015 01  09.05331  01 59 10.664  -21 48 48.57  22.1i 16TT94    W84  C~4ycG      
2015 01  09.05331  01 59 10.66   -21 48 48.6   22.2i 16TT94    W84  C~3cyn      
2015 01  12.09800  01 59 09.608  -21 46 08.67  22.6r 16TT94    W84  C~4ycG      
2015 01  12.09800  01 59 09.61   -21 46 08.7   22.6r 16TT94    W84  C~3cyn      
2015 01  12.09936  01 59 09.604  -21 46 08.59  22.5i 16TT94    W84  C~4ycG      
2015 01  12.09936  01 59 09.60   -21 46 08.6   22.5i 16TT94    W84  C~3cyn      
2015 01  12.10075  01 59 09.614  -21 46 08.55  22.9g 16TT94    W84  C~4ycG      
2015 01  12.10075  01 59 09.61   -21 46 08.5   23.1g 16TT94    W84  C~3cyn      
2015 01  12.10212  01 59 09.598  -21 46 08.47  22.5r 16TT94    W84  C~4ycG      
2015 01  12.10212  01 59 09.60   -21 46 08.5   22.5r 16TT94    W84  C~3cyn      
2015 11  21.10941  02 07 45.432  -21 31 56.37  22.4z 16TT94    W84  C~4ycG      
2015 11  21.10941  02 07 45.43   -21 31 56.4   22.7z 16TT94    W84  C~3cyn      
2015 12  01.20730  02 06 59.328  -21 30 08.05  22.4z 16TT94    W84  C~4ycG      
2015 12  04.14549  02 06 47.104  -21 29 16.87  22.3z 16TT94    W84  C~4ycG      
2015 12  04.14549  02 06 47.10   -21 29 16.9   22.4z 16TT94    W84  C~3cyn      
2015 12  15.17071  02 06 06.999  -21 24 46.49  22.1r 16TT94    W84  C~4ycG      
2015 12  15.17071  02 06 07.00   -21 24 46.5   22.4r 16TT94    W84  C~3cyn      
2015 12  15.17207  02 06 06.992  -21 24 46.43  22.5g 16TT94    W84  C~4ycG      
2015 12  15.17207  02 06 06.99   -21 24 46.4   22.6g 16TT94    W84  C~3cyn      
2016 01  20.07305  02 05 16.116  -20 58 05.34  22.1z 16TT94    W84  C~4ycG      
2016 01  20.07305  02 05 16.11   -20 58 05.3   22.7z 16TT94    W84  C~3cyn      
2016 02  06.03724  02 05 39.873  -20 41 10.31  22.5i 16TT94    W84  C~4ycG      
2016 02  06.03724  02 05 39.87   -20 41 10.3   22.6i 16TT94    W84  C~3cyn      
2016 09  23.24110  02 18 46.442  -20 26 53.64  22.3r 16TT94    W84  C~4ycG      
2016 09  23.24110  02 18 46.44   -20 26 53.6   22.4r 16TT94    W84  C~3cyn      
2016 09  24.23004  02 18 42.313  -20 27 37.29  22.6g 16TT94    W84  C~4ycG      
2016 09  24.23004  02 18 42.31   -20 27 37.3   22.7g 16TT94    W84  C~3cyn      
2016 10  06.27656  02 17 47.341  -20 35 46.11  23.3r 16TT94    807  C~2AEF      
2016 10  07.22556  02 17 42.670  -20 36 20.80  23.3r 16TT94    807  C~2AEF      
2016 11  09.28739  02 14 48.154  -20 48 52.55  22.5r 16TT94    W84  C~4ycG      
2016 11  09.28739  02 14 48.15   -20 48 52.6   22.2r 16TT94    W84  C~3cyn      
2016 11  09.28877  02 14 48.151  -20 48 52.49  21.9i 16TT94    W84  C~4ycG      
2016 11  09.28877  02 14 48.15   -20 48 52.5   22.0i 16TT94    W84  C~3cyn      
2016 11  18.24850  02 14 02.098  -20 49 16.96  22.6z 16TT94    W84  C~4ycG      
2016 11  18.24850  02 14 02.10   -20 49 17.0   22.6z 16TT94    W84  C~3cyn      
2016 12  31.13279  02 11 28.517  -20 32 32.87  21.7r 16TT94    W84  C~4ycG      
2017 10  11.30938  02 23 22.679  -19 54 44.42  22.1z 16TT94    W84  C~4ycG      
2017 12  22.15512  02 17 45.716  -19 56 02.96  22.4r 16TT94    W84  C~4ycG      
2017 12  22.15648  02 17 45.713  -19 56 02.86  23.2g 16TT94    W84  C~4ycG      
2018 11  26.16944  02 25 19.553  -19 21 49.79  22.5i 16TT94    W84  C~4ycG      
2018 11  28.19535  02 25 10.034  -19 21 33.44  22.6r 16TT94    W84  C~4ycG      
2018 12  02.16898  02 24 52.010  -19 20 49.22  23.0g 16TT94    W84  C~4ycG      
2020 11  14.219100 02 37 48.068  -17 53 16.92  22.4G 16TT94    G37  C~4O9U      
2020 11  14.300060 02 37 47.691  -17 53 17.07        16TT94    G37  C~4O9U      

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    -0.18
     2   0.0000      0.00     0.03       0.00    -0.15
     3   0.0083      0.00     0.07       0.00    -0.12
     4   0.0083      0.00     0.10       0.00    -0.15
     5   0.0083      0.00    -0.05       0.00    -0.13
     6   0.0083      0.00     0.01       0.00    -0.12
     7   0.0083      0.00     0.17       0.00    -0.15
     8   0.0083      0.00     0.11       0.00    -0.10
     9   0.0083      0.00    -0.04       0.00    -0.17
    10   0.0083      0.00    -0.07       0.00    -0.14
    11   0.8653      0.00     0.06       0.00     0.01
    12   0.8653      0.00     0.09       0.00     0.04
    13   0.8930      0.00    -0.01       0.00     0.16
    14   0.9010      0.00    -0.06       0.00    -0.04
    15   0.9010      0.00    -0.00       0.00    -0.01
    16   0.9312      0.00     0.08       0.00    -0.05
    17   0.9312      0.00     0.07       0.00    -0.04
    18   0.9312      0.00    -0.00       0.00     0.01
    19   0.9312      0.00     0.03       0.00    -0.02
    20   1.0295      0.00    -0.02       0.00     0.13
    21   1.0295      0.00     0.07       0.00     0.09
    22   1.0759      0.00    -0.07       0.00     0.09
    23   1.0759      0.00    -0.03       0.00     0.08
    24   1.7062      0.00    -0.02       0.00     0.05
    25   1.7062      0.00     0.01       0.00     0.01
    26   1.7089      0.00    -0.03       0.00    -0.01
    27   1.7089      0.00     0.01       0.00    -0.00
    28   1.7419      0.00     0.27       0.00     0.45
    29   1.7445      0.00    -0.13       0.00     0.50
    30   1.8350      0.00    -0.09       0.00    -0.03
    31   1.8350      0.00    -0.03       0.00     0.02
    32   1.8350      0.00     0.02       0.00     0.07
    33   1.8350      0.00     0.04       0.00     0.08
    34   1.8595      0.00    -0.03       0.00    -0.05
    35   1.8595      0.00    -0.06       0.00    -0.01
    36   1.9769      0.00     0.21       0.00     0.04
    37   2.7550      0.00    -0.11       0.00    -0.01
    38   2.9517      0.00    -0.10       0.00     0.16
    39   2.9517      0.00    -0.09       0.00     0.21
    40   3.8799      0.00    -0.22       0.00     0.17
    41   3.8854      0.00    -0.28       0.00     0.16
    42   3.8963      0.00    -0.28       0.00     0.22
    43   5.8485      0.00    -0.04       0.00    -0.66
    44   5.8487      0.00     0.73       0.00    -0.28

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.

16TT94    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        42.264    42.264    42.264
ecceobj         0.171     0.171     0.171
incobj         31.700    31.700    31.700
qmin           33.690    33.693    33.687
qmax           50.703    50.757    50.659
amean          42.021    42.022    42.022
amin           41.647    41.681    41.654
amax           42.420    42.428    42.416
emean           0.175     0.175     0.175
emin            0.155     0.154     0.155
emax            0.196     0.196     0.195
imean          29.915    29.915    29.915
imin           29.419    29.416    29.413
imax           30.416    30.426    30.419
excite_mean     0.529     0.529     0.529
fracstop        1.000     1.000     1.000
cjmean          2.733     2.733     2.733

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       183.2     183.4     183.5
kozaiamp        180.0     180.0     179.9