Orbit Fit and Astrometric record for 16GZ276

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: 16GZ276   
# Created Sat Dec  4 02:13:49 2021
# Orbit generated from Bernstein formalism
# Fitting     15 observations of     15
# Arc:   2.11y
# First observation: 2016/04/10
#  Last observation: 2018/05/19
Preliminary a, adot, b, bdot, g, gdot:
   0.000025   0.010780   0.000017  -0.002631   0.014816   0.000000
# Chi-squared of fit:     5.22 DOF:     24 RMS:  0.10
# Min/Max residuals:    -0.23    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.162735E-05  1.064558E-02 -2.386638E-06 -2.585203E-03  1.469323E-02 -8.305306E-03
# Covariance matrix:
  4.2970E-13 -1.7300E-13  1.4494E-14 -2.3154E-14  3.0844E-13  3.9624E-12
 -1.7300E-13  9.5042E-13  7.7385E-14 -2.4334E-13  6.8697E-13  3.8984E-11
  1.4494E-14  7.7385E-14  3.3737E-13 -2.1540E-13  1.0432E-13  4.1938E-12
 -2.3154E-14 -2.4334E-13 -2.1540E-13  2.3236E-13 -2.6283E-13 -1.2488E-11
  3.0844E-13  6.8697E-13  1.0432E-13 -2.6283E-13  1.4490E-12  4.2842E-11
  3.9624E-12  3.8984E-11  4.1938E-12 -1.2488E-11  4.2842E-11  2.0085E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   17.506877 -153.801760    0.096793    0.298859   -0.947019  2457488.840929
# Heliocentric elements and errors
Epoch:              2457480.5000  =  2016/04/02
Mean Anomaly:          345.55179 +/-     0.291
Argument of Peri:      219.28189 +/-     0.019
Long of Asc Node:       76.48481 +/-     0.005
Inclination:            21.96691 +/-     0.001
Eccentricity:         0.73817178 +/-    0.0041
Semi-Major Axis:    148.20640616 +/-    1.9700
Time of Perihelion: 2483929.5749 +/-      75.4
Perihelion:          38.80462008 +/-    0.7933
Aphelion:           257.60819225 +/-    3.4769
Period (y)             1804.2997 +/-     35.98
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -59.17569483 +/-    0.0048
Ecliptic Y          -29.00904720 +/-    0.0023
Ecliptic Z           20.47326658 +/-    0.0017
Ecliptic XDOT         0.00207016 +/-    0.0000
Ecliptic YDOT        -0.00119925 +/-    0.0000
Ecliptic ZDOT        -0.00092493 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   69.01045082 +/-    0.0042
Geocenter to KBO     68.05855401 +/-    0.0056
# Hcoef:  6.91

The following table shows the complete astrometric record for 16GZ276. 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 (16GZ276) followed by the observatory code and reference code for the source of the astrometry.

2016 04  10.34014  14 02 22.574  +06 13 48.30  25.2r 16GZ276   568  C~3wqc      
2016 04  10.44891  14 02 22.265  +06 13 50.28  25.1r 16GZ276   568  C~3wqc      
2016 06  04.37851  13 59 54.153  +06 21 25.27        16GZ276   568  C~3wqc      
2016 06  04.41293  13 59 54.068  +06 21 25.36  25.2r 16GZ276   568  C~3wqc      
2017 04  22.30315  14 03 54.475  +05 55 07.80  25.4r 16GZ276   304  C~3wqc      
2017 04  23.21424  14 03 51.775  +05 55 20.30  25.1r 16GZ276   304  C~3wqc      
2017 04  23.27375  14 03 51.599  +05 55 21.00  25.1r 16GZ276   304  C~3wqc      
2017 04  23.31997  14 03 51.473  +05 55 21.79  25.2r 16GZ276   304  C~3wqc      
2018 03  11.31116  14 07 53.787  +05 20 20.69  25.2r 16GZ276   304  C~3wqc      
2018 03  11.31912  14 07 53.764  +05 20 20.98        16GZ276   304  C~3wqc      
2018 03  11.37465  14 07 53.668  +05 20 22.18        16GZ276   304  C~3wqc      
2018 03  12.34484  14 07 51.658  +05 20 41.67        16GZ276   304  C~3wqc      
2018 03  12.37311  14 07 51.607  +05 20 42.43        16GZ276   304  C~3wqc      
2018 05  17.10836  14 04 51.362  +05 37 16.31  25.2r 16GZ276   304  C~3wqc      
2018 05  19.21543  14 04 45.674  +05 37 27.92  25.1r 16GZ276   304  C~3wqc      

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    -0.04       0.00    -0.08
     2   0.0003     -5.01    -0.01       0.19     0.10
     3   0.1507  -2229.72     0.12    -366.71    -0.01
     4   0.1508  -2230.94    -0.10    -367.08     0.07
     5   1.0321   1681.91     0.12    -553.05     0.05
     6   1.0346   1639.83    -0.11    -555.87    -0.10
     7   1.0347   1637.12    -0.04    -556.17    -0.19
     8   1.0349   1635.09     0.07    -556.10     0.03
     9   1.9164   5768.00     0.06   -1212.24    -0.07
    10   1.9164   5767.58    -0.07   -1212.09     0.01
    11   1.9166   5765.80     0.17   -1211.49     0.19
    12   1.9192   5730.74    -0.09   -1204.16    -0.00
    13   1.9193   5729.76    -0.04   -1203.72     0.22
    14   2.0993   2859.80     0.04   -1247.29    -0.00
    15   2.1051   2776.39    -0.08   -1267.03    -0.23

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.

16GZ276    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       144.002   149.669   138.826
ecceobj         0.734     0.746     0.722
incobj         22.018    22.019    22.016
qmin           36.639    36.395    37.011
qmax          270.083   280.533   256.523
amean         146.679   152.097   141.447
amin          142.255   147.713   137.575
amax          154.240   159.353   147.562
emean           0.739     0.750     0.728
emin            0.728     0.739     0.716
emax            0.751     0.761     0.739
imean          20.081    20.132    20.063
imin           19.610    19.554    19.640
imax           20.866    21.216    20.839
excite_mean     0.815     0.825     0.804
fracstop        1.000     1.000     1.000
cjmean          2.998     2.991     3.006

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       266.5     268.0     267.0
kozaiamp         47.5      50.2      46.3