Orbit Fit and Astrometric record for 16SJ56

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: 16SJ56    
# Created Fri Dec  3 02:13:53 2021
# Orbit generated from Bernstein formalism
# Fitting     16 observations of     16
# Arc:   0.97y
# First observation: 2015/10/10
#  Last observation: 2016/09/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000001   0.031805  -0.000000  -0.003468   0.027861   0.000000
# Chi-squared of fit:     0.63 DOF:     26 RMS:  0.04
# Min/Max residuals:    -0.06    0.06
# Exact a, adot, b, bdot, g, gdot:
  1.806003E-05  3.183287E-02 -2.245795E-06 -3.468337E-03  2.788225E-02 -1.151611E-04
# Covariance matrix:
  2.5913E-13  1.2177E-11  1.1718E-14 -1.2227E-12  5.7845E-12  3.7662E-10
  1.2177E-11  9.7355E-09  5.8431E-12 -8.7737E-10  1.8403E-09  2.8112E-07
  1.1718E-14  5.8431E-12  1.3845E-13 -6.7156E-13  1.2420E-12  1.6957E-10
 -1.2227E-12 -8.7737E-10 -6.7156E-13  7.9649E-11 -1.6943E-10 -2.5358E-08
  5.7845E-12  1.8403E-09  1.2420E-12 -1.6943E-10  4.5768E-10  5.3807E-08
  3.7662E-10  2.8112E-07  1.6957E-10 -2.5358E-08  5.3807E-08  8.1222E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
  -14.738894   27.486062    0.188560   -0.250316   -0.952185  2457306.007012
# Heliocentric elements and errors
Epoch:              2457300.5000  =  2015/10/05
Mean Anomaly:          357.92877 +/-    17.008
Argument of Peri:      250.06061 +/-    27.782
Long of Asc Node:      141.26532 +/-     0.097
Inclination:            15.65391 +/-     0.011
Eccentricity:         0.22643812 +/-    0.0015
Semi-Major Axis:     47.57667962 +/-    0.2420
Time of Perihelion: 2457990.1287 +/-    5662.8
Perihelion:          36.80350549 +/-    0.2001
Aphelion:            58.34985374 +/-    0.3051
Period (y)              328.1704 +/-      2.50
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.72632712 +/-    0.0236
Ecliptic Y           16.29509309 +/-    0.0123
Ecliptic Z           -9.12469325 +/-    0.0070
Ecliptic XDOT        -0.00153086 +/-    0.0002
Ecliptic YDOT         0.00272136 +/-    0.0001
Ecliptic ZDOT        -0.00032643 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   36.81507732 +/-    0.0211
Geocenter to KBO     35.86510606 +/-    0.0275
# Hcoef:  8.39

The following table shows the complete astrometric record for 16SJ56. 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 (16SJ56) followed by the observatory code and reference code for the source of the astrometry.

2015 10  10.506223 02 03 03.535  -03 12 10.93  23.9r 16SJ56    568  C~2TuW      
2015 10  10.518114 02 03 03.475  -03 12 11.42  23.9r 16SJ56    568  C~2TuW      
2015 10  10.537679 02 03 03.383  -03 12 12.06  23.8r 16SJ56    568  C~2TuW      
2015 10  10.539803 02 03 03.371  -03 12 12.13  23.7r 16SJ56    568  C~2TuW      
2015 10  10.566184 02 03 03.244  -03 12 13.05  23.8r 16SJ56    568  C~2TuW      
2015 10  10.577109 02 03 03.191  -03 12 13.44  23.5r 16SJ56    568  C~2TuW      
2015 10  14.508049 02 02 43.985  -03 14 24.84  24.6g 16SJ56    568  C~2TuW      
2015 10  14.519899 02 02 43.925  -03 14 25.22  24.6g 16SJ56    568  C~2TuW      
2015 10  14.539481 02 02 43.824  -03 14 25.84  24.6g 16SJ56    568  C~2TuW      
2015 10  14.568007 02 02 43.678  -03 14 26.75  24.4g 16SJ56    568  C~2TuW      
2015 10  14.602694 02 02 43.503  -03 14 27.89  24.4g 16SJ56    568  C~2TuW      
2016 09  27.44867  02 11 05.44   -02 37 25.5   24.5g 16SJ56    568  C~2eAH      
2016 09  28.45775  02 11 01.15   -02 38 02.1   24.7g 16SJ56    568  C~2eAH      
2016 09  28.57764  02 11 00.62   -02 38 06.5   24.6g 16SJ56    568  C~2eAH      
2016 09  29.46952  02 10 56.78   -02 38 38.7   24.6g 16SJ56    568  C~2eAH      
2016 09  29.52997  02 10 56.52   -02 38 40.9   24.6g 16SJ56    568  C~2eAH      

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    -0.00       0.00     0.06
     2   0.0000     -1.01    -0.05      -0.14    -0.01
     3   0.0001     -2.53     0.02      -0.25    -0.01
     4   0.0001     -2.72    -0.00      -0.25    -0.00
     5   0.0002     -4.83     0.02      -0.44    -0.04
     6   0.0002     -5.71     0.03      -0.53    -0.06
     7   0.0110   -321.22     0.03     -21.80    -0.03
     8   0.0110   -322.19     0.03     -21.84    -0.02
     9   0.0110   -323.83     0.00     -21.88     0.01
    10   0.0111   -326.19    -0.03     -21.96     0.05
    11   0.0112   -329.05    -0.05     -22.10     0.06
    12   0.9663   7493.09    -0.02    -607.80     0.03
    13   0.9691   7419.91     0.05    -619.19     0.01
    14   0.9694   7410.91    -0.03    -620.49    -0.02
    15   0.9718   7345.60    -0.05    -630.16     0.02
    16   0.9720   7341.18     0.05    -630.83    -0.04

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.

16SJ56    quality flag:1

Type:           2:1E    5:2EEE  SCATNEAR

axisobj        48.221    56.024    47.531
ecceobj         0.237     0.403     0.235
incobj         15.629    15.668    15.619
qmin           35.825    33.031    35.528
qmax           60.497    79.134    59.266
amean          47.797    55.462    47.107
amin           47.270    54.734    46.665
amax           48.425    56.373    47.640
emean           0.207     0.362     0.227
emin            0.156     0.291     0.210
emax            0.251     0.405     0.245
imean          15.480    17.257    14.868
imin           14.038    14.326    14.214
imax           16.761    21.376    15.520
excite_mean     0.339     0.470     0.342
fracstop        1.000     1.000     1.000
cjmean          3.004     2.957     2.994

libcent 0        86.9     175.4    -180.0
libamp  0        43.7      99.0    -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       160.0     229.2     182.0
kozaiamp        180.0      18.9     180.0