Orbit Fit and Astrometric record for 16UP273

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: 16UP273   
# Created Sat Dec  4 02:13:58 2021
# Orbit generated from Bernstein formalism
# Fitting      9 observations of      9
# Arc:   4.07y
# First observation: 2014/10/21
#  Last observation: 2018/11/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000795   0.044982  -0.000126   0.006534   0.032364   0.000000
# Chi-squared of fit:     3.70 DOF:     12 RMS:  0.11
# Min/Max residuals:    -0.20    0.20
# Exact a, adot, b, bdot, g, gdot:
  2.189474E-05  4.382638E-02  3.096591E-06  6.373032E-03  3.186417E-02 -5.996418E-03
# Covariance matrix:
  1.4444E-12 -1.0400E-12  6.7790E-14 -1.0352E-13 -1.8996E-13 -3.9590E-12
 -1.0400E-12  1.2653E-12 -1.1062E-13  1.6833E-13  3.7509E-13  6.4475E-12
  6.7790E-14 -1.1062E-13  1.0297E-12 -3.6638E-13 -4.2329E-14 -6.3544E-13
 -1.0352E-13  1.6833E-13 -3.6638E-13  1.6735E-13  5.4011E-14  9.6609E-13
 -1.8996E-13  3.7509E-13 -4.2329E-14  5.4011E-14  1.2724E-12  2.2461E-12
 -3.9590E-12  6.4475E-12 -6.3544E-13  9.6609E-13  2.2461E-12  3.7019E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -11.686372   24.970599   -0.043473   -0.201638   -0.975725  2456951.788308
# Heliocentric elements and errors
Epoch:              2456950.5000  =  2014/10/20
Mean Anomaly:          356.23951 +/-     0.004
Argument of Peri:      325.96009 +/-     0.020
Long of Asc Node:       78.37218 +/-     0.001
Inclination:            14.02721 +/-     0.000
Eccentricity:         0.62002590 +/-    0.0002
Semi-Major Axis:     83.17189497 +/-    0.0387
Time of Perihelion: 2459844.5449 +/-       2.8
Perihelion:          31.60316632 +/-    0.0203
Aphelion:           134.74062363 +/-    0.0642
Period (y)              758.5306 +/-      0.53
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.74196850 +/-    0.0010
Ecliptic Y           13.43575914 +/-    0.0005
Ecliptic Z           -6.35676116 +/-    0.0002
Ecliptic XDOT        -0.00195100 +/-    0.0000
Ecliptic YDOT         0.00324272 +/-    0.0000
Ecliptic ZDOT         0.00064071 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.35782424 +/-    0.0009
Geocenter to KBO     31.38321592 +/-    0.0011
# Hcoef:  8.80

The following table shows the complete astrometric record for 16UP273. 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 (16UP273) followed by the observatory code and reference code for the source of the astrometry.

2014 10  21.28753  01 49 32.380  -01 13 33.99  23.9r 16UP273   W84  C~55b1      
2016 10  28.23296  02 06 41.238  +01 14 13.60  23.3r 16UP273   W84  C~55b1      
2016 10  28.23436  02 06 41.240  +01 14 13.51  23.1i 16UP273   W84  C~55b1      
2016 11  27.12737  02 04 01.462  +01 05 45.88  24.2r 16UP273   W84  C~55b1      
2017 09  18.31069  02 19 10.635  +02 50 00.64  24.3r 16UP273   W84  C~55b1      
2017 09  25.30996  02 18 41.207  +02 46 32.59  24.0r 16UP273   W84  C~55b1      
2017 09  25.34372  02 18 41.048  +02 46 31.69  23.3i 16UP273   W84  C~55b1      
2017 10  27.25430  02 15 51.702  +02 31 11.02  24.4g 16UP273   W84  C~55b1      
2018 11  16.14261  02 23 07.431  +03 40 57.76  23.3i 16UP273   W84  C~55b1      

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     0.01
     2   2.0204  17635.83     0.08    2706.93     0.05
     3   2.0204  17635.82     0.20    2706.83    -0.06
     4   2.1022  15202.49    -0.12    3097.66     0.05
     5   2.9104  30361.62    -0.16    4046.97     0.17
     6   2.9296  29864.93     0.08    4009.99    -0.14
     7   2.9297  29862.32     0.06    4010.00    -0.01
     8   3.0170  27111.54    -0.20    4059.30    -0.15
     9   4.0708  34882.42     0.08    5659.02     0.08

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.

16UP273    quality flag:2

Type:       CENTAURR  CENTAURS  CENTAURR

axisobj        84.914    85.021    84.808
ecceobj         0.627     0.628     0.627
incobj         14.029    14.029    14.029
qmin           29.256    29.894    28.980
qmax          145.497   141.572   143.800
amean          72.343    67.455    76.778
amin           61.190    61.360    65.470
amax           88.743    86.634    87.843
emean           0.571     0.532     0.598
emin            0.495     0.478     0.544
emax            0.640     0.634     0.637
imean          11.092    13.923    10.419
imin            7.131     9.982     6.029
imax           13.779    16.934    13.946
excite_mean     0.603     0.584     0.626
fracstop        0.800     1.000     0.359
cjmean          2.909     2.905     2.906

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       171.8     174.9     170.7
kozaiamp        179.9     180.0     179.8