Orbit Fit and Astrometric record for 16GB277

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: 16GB277   
# Created Fri Dec  3 02:13:48 2021
# Orbit generated from Bernstein formalism
# Fitting     14 observations of     14
# Arc:   1.92y
# First observation: 2016/04/10
#  Last observation: 2018/03/12
Preliminary a, adot, b, bdot, g, gdot:
   0.000018   0.009434   0.000009  -0.005040   0.015039   0.000000
# Chi-squared of fit:     8.19 DOF:     22 RMS:  0.14
# Min/Max residuals:    -0.27    0.39
# Exact a, adot, b, bdot, g, gdot:
  9.798920E-06  9.350382E-03 -4.365592E-06 -4.986015E-03  1.487555E-02 -5.810253E-03
# Covariance matrix:
  4.8366E-13 -1.2289E-13  3.1995E-14 -1.7836E-13  1.2511E-12  1.7903E-11
 -1.2289E-13  2.0073E-12  1.1279E-13 -9.5257E-13  1.8330E-12  9.4712E-11
  3.1995E-14  1.1279E-13  2.9051E-13 -2.3758E-13  2.8989E-13  8.1025E-12
 -1.7836E-13 -9.5257E-13 -2.3758E-13  7.5264E-13 -1.8991E-12 -6.1125E-11
  1.2511E-12  1.8330E-12  2.8989E-13 -1.8991E-12  9.0828E-12  1.8983E-10
  1.7903E-11  9.4712E-11  8.1025E-12 -6.1125E-11  1.8983E-10  6.0909E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   14.456842 -167.827682   -0.146011    0.246539   -0.955715  2457488.796789
# Heliocentric elements and errors
Epoch:              2457480.5000  =  2016/04/02
Mean Anomaly:          314.07958 +/-     0.686
Argument of Peri:      255.08586 +/-     0.214
Long of Asc Node:       37.06497 +/-     0.002
Inclination:            31.22553 +/-     0.002
Eccentricity:         0.49276254 +/-    0.0064
Semi-Major Axis:     79.74353447 +/-    0.7043
Time of Perihelion: 2490658.1021 +/-     229.7
Perihelion:          40.44890808 +/-    0.6252
Aphelion:           119.03816086 +/-    1.1699
Period (y)              712.1171 +/-      9.43
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -64.57004094 +/-    0.0129
Ecliptic Y          -14.07921672 +/-    0.0028
Ecliptic Z           16.78235873 +/-    0.0034
Ecliptic XDOT         0.00115133 +/-    0.0000
Ecliptic YDOT        -0.00151920 +/-    0.0000
Ecliptic ZDOT        -0.00115559 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   68.18476439 +/-    0.0123
Geocenter to KBO     67.22440165 +/-    0.0136
# Hcoef:  7.16

The following table shows the complete astrometric record for 16GB277. 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 (16GB277) followed by the observatory code and reference code for the source of the astrometry.

2016 04  10.29600  13 07 23.290  +08 30 05.01  25.5r 16GB277   568  C~3wqc      
2016 04  10.39720  13 07 22.973  +08 30 06.48  25.2r 16GB277   568  C~3wqc      
2016 04  10.54963  13 07 22.516  +08 30 08.67  25.5r 16GB277   568  C~3wqc      
2016 05  03.11824  13 06 16.739  +08 34 13.86        16GB277   304  C~3wqc      
2016 05  03.22953  13 06 16.427  +08 34 14.97        16GB277   304  C~3wqc      
2017 04  22.21706  13 08 21.412  +08 03 57.38  25.4r 16GB277   304  C~3wqc      
2017 04  23.20653  13 08 18.488  +08 04 08.25  25.3r 16GB277   304  C~3wqc      
2018 03  11.22340  13 11 59.975  +07 23 37.42        16GB277   304  C~3wqc      
2018 03  11.23141  13 11 59.947  +07 23 37.50        16GB277   304  C~3wqc      
2018 03  11.29344  13 11 59.789  +07 23 38.97        16GB277   304  C~3wqc      
2018 03  11.30141  13 11 59.766  +07 23 39.22        16GB277   304  C~3wqc      
2018 03  12.20974  13 11 57.360  +07 23 56.13  25.4r 16GB277   304  C~3wqc      
2018 03  12.21765  13 11 57.343  +07 23 56.56        16GB277   304  C~3wqc      
2018 03  12.32833  13 11 57.052  +07 23 58.79        16GB277   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     0.03       0.00    -0.19
     2   0.0003     -4.90    -0.06      -0.50    -0.21
     3   0.0007    -12.00     0.10      -1.15    -0.11
     4   0.0625  -1005.61     0.05    -158.95     0.12
     5   0.0628  -1010.30    -0.13    -159.75     0.39
     6   1.0320   1409.95     0.08   -1101.80     0.05
     7   1.0347   1365.75    -0.04   -1108.90     0.01
     8   1.9163   5351.37     0.04   -2043.39    -0.09
     9   1.9163   5350.96    -0.02   -2043.48    -0.19
    10   1.9165   5348.22    -0.02   -2043.06     0.11
    11   1.9165   5347.80    -0.08   -2042.97     0.19
    12   1.9190   5308.22     0.03   -2041.59    -0.27
    13   1.9190   5307.81    -0.02   -2041.30     0.02
    14   1.9193   5302.95     0.05   -2040.96     0.17

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.

16GB277    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        78.564    80.628    76.673
ecceobj         0.492     0.510     0.474
incobj         31.421    31.421    31.420
qmin           39.339    38.858    39.806
qmax          121.336   126.466   116.838
amean          79.242    81.385    77.321
amin           78.173    80.298    76.247
amax           80.732    83.069    78.748
emean           0.486     0.504     0.468
emin            0.471     0.490     0.453
emax            0.503     0.522     0.484
imean          31.222    31.271    31.170
imin           30.617    30.620    30.633
imax           31.908    31.968    31.818
excite_mean     0.710     0.724     0.698
fracstop        1.000     1.000     1.000
cjmean          2.805     2.797     2.813

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       199.4     205.0     195.4
kozaiamp        180.0     180.0     180.0