Orbit Fit and Astrometric record for 15TQ454

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: 15TQ454   
# Created Wed Dec  8 02:13:36 2021
# Orbit generated from Bernstein formalism
# Fitting      7 observations of      7
# Arc:   2.18y
# First observation: 2015/10/07
#  Last observation: 2017/12/11
Preliminary a, adot, b, bdot, g, gdot:
   0.000087   0.027404   0.000019   0.010790   0.026512   0.000000
# Chi-squared of fit:     2.72 DOF:      8 RMS:  0.11
# Min/Max residuals:    -0.17    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.687024E-05  2.743646E-02  6.400966E-06  1.084616E-02  2.636872E-02 -3.367273E-03
# Covariance matrix:
  5.4340E-13 -6.8852E-13  7.4512E-14 -3.9455E-13  2.9064E-13 -1.3000E-11
 -6.8852E-13  4.4978E-12 -6.4267E-13  3.1033E-12  2.5941E-13  1.0826E-10
  7.4512E-14 -6.4267E-13  5.4494E-13 -7.4082E-13  1.1736E-14 -1.6794E-11
 -3.9455E-13  3.1033E-12 -7.4082E-13  2.6694E-12 -2.6319E-13  8.2334E-11
  2.9064E-13  2.5941E-13  1.1736E-14 -2.6319E-13  1.9017E-12 -4.6397E-12
 -1.3000E-11  1.0826E-10 -1.6794E-11  8.2334E-11 -4.6397E-12  2.8450E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
  -24.972168   13.058606   -0.005827   -0.423415   -0.909625  2457302.703629
# Heliocentric elements and errors
Epoch:              2457300.5000  =  2015/10/05
Mean Anomaly:          342.33232 +/-     0.227
Argument of Peri:      340.11612 +/-     0.432
Long of Asc Node:       59.14387 +/-     0.002
Inclination:            32.14231 +/-     0.001
Eccentricity:         0.26539419 +/-    0.0010
Semi-Major Axis:     51.28596307 +/-    0.0246
Time of Perihelion: 2463884.2492 +/-      84.4
Perihelion:          37.67496642 +/-    0.0534
Aphelion:            64.89695973 +/-    0.0591
Period (y)              367.2874 +/-      0.26
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.46171187 +/-    0.0018
Ecliptic Y            7.99990558 +/-    0.0004
Ecliptic Z          -16.01037421 +/-    0.0008
Ecliptic XDOT        -0.00049093 +/-    0.0000
Ecliptic YDOT         0.00280433 +/-    0.0000
Ecliptic ZDOT         0.00116852 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.83220514 +/-    0.0016
Geocenter to KBO     37.92372171 +/-    0.0020
# Hcoef:  7.99

The following table shows the complete astrometric record for 15TQ454. 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 (15TQ454) followed by the observatory code and reference code for the source of the astrometry.

2015 10  07.20284  01 27 47.573  -17 48 37.03  23.3i 15TQ454   W84  C~55X8      
2015 11  06.11474  01 25 12.176  -17 55 46.29  23.1i 15TQ454   W84  C~55X8      
2015 11  07.13886  01 25 07.197  -17 55 47.85  24.0i 15TQ454   W84  C~55X8      
2016 09  30.29285  01 33 15.377  -16 32 58.38  23.2i 15TQ454   W84  C~55X8      
2016 10  02.21950  01 33 05.716  -16 33 54.07  24.2r 15TQ454   W84  C~55X8      
2017 11  24.15304  01 33 37.938  -15 29 08.78  24.2r 15TQ454   W84  C~55X8      
2017 12  11.06035  01 32 39.890  -15 23 48.38  24.1r 15TQ454   W84  C~55X8      

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    -0.09       0.00     0.02
     2   0.0819  -2202.12    -0.17     507.03     0.05
     3   0.0847  -2267.77     0.22     534.30    -0.03
     4   0.9831   6148.07    -0.14    2212.68     0.06
     5   0.9884   5998.43     0.20    2219.36    -0.13
     6   2.1326   8031.61    -0.02    5568.85     0.06
     7   2.1789   7398.84    -0.01    6207.97    -0.02

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.

15TQ454    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        51.953    52.000    51.908
ecceobj         0.274     0.275     0.273
incobj         32.103    32.103    32.102
qmin           36.063    35.197    36.209
qmax           67.661    69.063    67.419
amean          51.546    51.668    51.504
amin           51.052    51.085    50.982
amax           52.123    52.418    52.105
emean           0.278     0.291     0.276
emin            0.257     0.260     0.257
emax            0.299     0.318     0.295
imean          30.751    30.369    30.779
imin           30.268    29.734    30.336
imax           31.308    31.265    31.328
excite_mean     0.582     0.584     0.581
fracstop        1.000     1.000     1.000
cjmean          2.744     2.745     2.744

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       157.0     174.1     156.4
kozaiamp        180.0     180.0     179.9