Orbit Fit and Astrometric record for 16RO100

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: 16RO100   
# Created Tue Apr  1 01:10:51 2025
# Orbit generated from Bernstein formalism
# Fitting     24 observations of     24
# Arc:   3.15y
# First observation: 2016/08/01
#  Last observation: 2019/09/27
Preliminary a, adot, b, bdot, g, gdot:
  -0.000163   0.031848   0.000002   0.002477   0.027136   0.000000
# Chi-squared of fit:    10.11 DOF:     42 RMS:  0.11
# Min/Max residuals:    -0.25    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.793340E-05  3.150195E-02  1.717616E-06  2.435864E-03  2.734765E-02 -1.601249E-03
# Covariance matrix:
  2.3028E-13 -6.5484E-13  2.3245E-15 -7.5559E-14  3.1494E-13 -8.7642E-12
 -6.5484E-13  6.9006E-12 -5.9888E-14  7.5576E-13 -1.7175E-13  8.8653E-11
  2.3245E-15 -5.9888E-14  8.2546E-14 -3.4993E-14 -8.8044E-15 -7.5046E-13
 -7.5559E-14  7.5576E-13 -3.4993E-14  1.2185E-13 -4.0549E-14  9.8121E-12
  3.1494E-13 -1.7175E-13 -8.8044E-15 -4.0549E-14  9.8614E-13 -4.4311E-12
 -8.7642E-12  8.8653E-11 -7.5046E-13  9.8121E-12 -4.4311E-12  1.1503E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.924762   -6.341284    0.705140    0.062795   -0.727482  2457601.960659
# Heliocentric elements and errors
Epoch:              2457600.5000  =  2016/07/31
Mean Anomaly:          349.36196 +/-     0.159
Argument of Peri:       65.92995 +/-     0.292
Long of Asc Node:      305.77003 +/-     0.003
Inclination:             6.60984 +/-     0.000
Eccentricity:         0.26731438 +/-    0.0002
Semi-Major Axis:     50.32325751 +/-    0.0120
Time of Perihelion: 2461453.6031 +/-      57.6
Perihelion:          36.87112706 +/-    0.0136
Aphelion:            63.77538795 +/-    0.0184
Period (y)              356.9943 +/-      0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.85253347 +/-    0.0013
Ecliptic Y           -4.80756096 +/-    0.0002
Ecliptic Z            3.13923241 +/-    0.0001
Ecliptic XDOT         0.00017007 +/-    0.0000
Ecliptic YDOT         0.00314740 +/-    0.0000
Ecliptic ZDOT         0.00022918 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.29713992 +/-    0.0013
Geocenter to KBO     36.56620991 +/-    0.0013
# Hcoef:  9.24

The following table shows the complete astrometric record for 16RO100. 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 (16RO100) followed by the observatory code and reference code for the source of the astrometry.

2016 08  01.45987  23 28 55.25   +02 00 18.9   24.6z 16RO100   T09  C~83Ec      
2016 08  01.47877  23 28 55.17   +02 00 18.4   25.3z 16RO100   T09  C~83Ec      
2016 08  01.50310  23 28 55.11   +02 00 18.4   24.1z 16RO100   T09  C~83Ec      
2016 08  01.52754  23 28 55.01   +02 00 17.9   24.3z 16RO100   T09  C~83Ec      
2016 08  01.57371  23 28 54.87   +02 00 17.4   24.7z 16RO100   T09  C~83Ec      
2016 08  01.58461  23 28 54.81   +02 00 17.1   24.6z 16RO100   T09  C~83Ec      
2016 08  28.39121  23 27 05.18   +01 51 11.6   25.1g 16RO100   T09  C~83Ec      
2016 08  28.40042  23 27 05.14   +01 51 11.4   24.9g 16RO100   T09  C~83Ec      
2016 08  28.40907  23 27 05.12   +01 51 11.1   25.1g 16RO100   T09  C~83Ec      
2016 08  28.41119  23 27 05.09   +01 51 11.2   25.2g 16RO100   T09  C~83Ec      
2016 09  05.34434  23 26 27.27   +01 47 35.9   25.3i 16RO100   T09  C~83Ec      
2016 09  05.39372  23 26 27.04   +01 47 34.4   24.7i 16RO100   T09  C~83Ec      
2016 09  05.39642  23 26 27.02   +01 47 34.6   25.0i 16RO100   T09  C~83Ec      
2016 09  07.38805  23 26 17.34   +01 46 37.7   25.0r 16RO100   T09  C~83Ec      
2016 09  07.40976  23 26 17.23   +01 46 37.0   25.1r 16RO100   T09  C~83Ec      
2016 09  07.42287  23 26 17.18   +01 46 36.8   25.2r 16RO100   T09  C~83Ec      
2016 09  07.45624  23 26 17.01   +01 46 35.8   25.1r 16RO100   T09  C~83Ec      
2016 09  07.45841  23 26 16.99   +01 46 35.8   25.2r 16RO100   T09  C~83Ec      
2017 06  24.574465 23 36 22.22   +02 51 29.2         16RO100   T09  C~86u0      
2019 09  27.25121  23 44 13.44   +04 09 58.4   25.3g 16RO100   T09  C~86u0      
2019 09  27.27214  23 44 13.32   +04 09 57.9   25.4g 16RO100   T09  C~86u0      
2019 09  27.288954 23 44 13.26   +04 09 57.0         16RO100   T09  C~86u0      
2019 09  27.47425  23 44 12.33   +04 09 51.3   24.8g 16RO100   T09  C~86u0      
2019 09  27.48691  23 44 12.27   +04 09 51.0   25.4g 16RO100   T09  C~86u0      

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     0.06       0.00    -0.06
     2   0.0001     -1.30    -0.25       0.02    -0.19
     3   0.0001     -2.13     0.20       0.37    -0.02
     4   0.0002     -3.70    -0.09       0.50    -0.07
     5   0.0003     -5.83     0.22       0.88    -0.05
     6   0.0003     -6.77    -0.16       0.96    -0.06
     7   0.0737  -1732.04    -0.11     150.35     0.03
     8   0.0738  -1732.67    -0.04     150.40     0.04
     9   0.0738  -1733.06     0.22     150.24    -0.16
    10   0.0738  -1733.43     0.01     150.51     0.10
    11   0.0955  -2339.42    -0.09     177.27     0.06
    12   0.0956  -2343.18     0.05     177.26    -0.12
    13   0.0957  -2343.37     0.06     177.56     0.18
    14   0.1011  -2499.19    -0.08     182.77     0.05
    15   0.1012  -2500.99    -0.14     182.78    -0.00
    16   0.1012  -2501.75     0.14     182.89     0.07
    17   0.1013  -2504.49     0.06     182.99     0.06
    18   0.1013  -2504.76    -0.04     183.10     0.17
    19   0.8956   7369.64    -0.01     174.90    -0.00
    20   3.1534  15735.81     0.06    1733.13     0.01
    21   3.1535  15733.95    -0.11    1733.38     0.25
    22   3.1535  15732.76     0.06    1732.90    -0.23
    23   3.1540  15717.64    -0.04    1733.11    -0.06
    24   3.1541  15716.69     0.03    1733.19     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.

16RO100    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        50.961    51.021    50.903
ecceobj         0.277     0.277     0.277
incobj          6.607     6.607     6.607
qmin           36.155    36.226    36.172
qmax           65.796    65.884    65.792
amean          50.652    50.718    50.643
amin           50.127    50.224    50.139
amax           51.271    51.315    51.300
emean           0.270     0.270     0.271
emin            0.257     0.258     0.259
emax            0.284     0.284     0.284
imean           8.179     8.186     8.206
imin            7.603     7.609     7.613
imax            8.950     8.941     8.949
excite_mean     0.305     0.306     0.306
fracstop        1.000     1.000     1.000
cjmean          3.066     3.067     3.066

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       176.3     176.3     176.3
kozaiamp        180.0     180.0     180.0