Orbit Fit and Astrometric record for 13RQ98

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: 13RQ98    
# Created Mon Dec 18 02:37:56 2017
# Orbit generated from Bernstein formalism
# Fitting   11 observations of   11
# Arc:   3.10y
# First observation: 2013/09/01
#  Last observation: 2016/10/09
Preliminary a, adot, b, bdot, g, gdot:
   0.000020   0.037601   0.000015   0.004399   0.030213   0.000000
# Chi-squared of fit:     1.83 DOF:   16 RMS:  0.07
# Min/Max residuals:    -0.12    0.13
# Exact a, adot, b, bdot, g, gdot:
  1.967467E-05  3.861772E-02  2.406818E-06  4.586443E-03  3.052940E-02  6.159003E-03
# Covariance matrix:
  4.0656E-13 -9.2489E-13 -1.4254E-13 -2.4085E-13  1.1531E-12 -8.2404E-12
 -9.2489E-13  1.1018E-10 -4.2723E-12  2.0762E-11  2.8071E-11  9.8657E-10
 -1.4254E-13 -4.2723E-12  5.5307E-13 -8.0060E-13 -2.4111E-12 -3.7696E-11
 -2.4085E-13  2.0762E-11 -8.0060E-13  4.0145E-12  4.6897E-12  1.8628E-10
  1.1531E-12  2.8071E-11 -2.4111E-12  4.6897E-12  1.7472E-11  2.4696E-10
 -8.2404E-12  9.8657E-10 -3.7696E-11  1.8628E-10  2.4696E-10  8.8409E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
  -37.768312  -67.814317   -0.730613   -0.427403   -0.551749  2456536.587908
# Heliocentric elements and errors
Epoch:              2456530.5000  =  2013/08/26
Mean Anomaly:           12.97785 +/-     0.113
Argument of Peri:      245.08216 +/-     0.341
Long of Asc Node:       11.21670 +/-     0.001
Inclination:            37.69277 +/-     0.000
Eccentricity:         0.43134417 +/-    0.0021
Semi-Major Axis:     55.41091789 +/-    0.1357
Time of Perihelion: 2451099.3518 +/-      42.8
Perihelion:          31.50974143 +/-    0.1405
Aphelion:            79.31209435 +/-    0.2270
Period (y)              412.4784 +/-      1.51
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           10.71783498 +/-    0.0013
Ecliptic Y          -24.34357874 +/-    0.0033
Ecliptic Z          -20.06157301 +/-    0.0027
Ecliptic XDOT         0.00346061 +/-    0.0000
Ecliptic YDOT         0.00066910 +/-    0.0000
Ecliptic ZDOT        -0.00001301 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.31588997 +/-    0.0029
Geocenter to KBO     32.75530680 +/-    0.0045
# Hcoef:  7.92

The following table shows the complete astrometric record for 13RQ98. 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 (13RQ98) followed by the observatory code and reference code for the source of the astrometry.

2013 09  01.087130 20 19 35.16   -58 32 58.1   22.7r 13RQ98    W84  C~2Gib      
2013 09  01.088530 20 19 35.14   -58 32 58.0   22.5i 13RQ98    W84  C~2Gib      
2013 09  13.005903 20 18 09.36   -58 24 55.6   22.4z 13RQ98    W84  C~2Gib      
2013 09  22.993067 20 17 16.72   -58 16 22.1   22.6i 13RQ98    W84  C~2Gib      
2013 09  23.005822 20 17 16.67   -58 16 21.5   23.0r 13RQ98    W84  C~2Gib      
2013 09  23.090185 20 17 16.31   -58 16 16.7   22.4z 13RQ98    W84  C~2Gib      
2013 09  29.003160 20 16 54.44   -58 10 31.7   23.0r 13RQ98    W84  C~2Gib      
2016 09  24.039537 20 59 17.02   -55 15 23.7   23.2r 13RQ98    W84  C~2Gib      
2016 09  24.040891 20 59 17.02   -55 15 23.7   22.5i 13RQ98    W84  C~2Gib      
2016 10  09.001701 20 58 13.17   -55 02 15.2   22.2z 13RQ98    W84  C~2Gib      
2016 10  09.011528 20 58 13.14   -55 02 14.7   22.6i 13RQ98    W84  C~2Gib      

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     0.07       0.00    -0.01
  2   0.0000     -0.12     0.02       0.14     0.06
  3   0.0326   -507.15    -0.06     654.41    -0.10
  4   0.0600   -760.43    -0.05    1263.74     0.06
  5   0.0600   -760.64    -0.03    1264.43    -0.06
  6   0.0602   -762.02     0.13    1269.83    -0.02
  7   0.0764   -831.68    -0.07    1649.35     0.06
  8   3.0635  22518.22    -0.12    4101.89     0.04
  9   3.0635  22518.22    -0.09    4101.89    -0.04
 10   3.1045  22353.56     0.12    5053.50     0.04
 11   3.1045  22353.53     0.09    5054.06    -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.

13RQ98    quality flag:2

Type:       SCATNEAR  SCATNEAR    5:2EEE

axisobj        55.404    55.878    54.953
ecceobj         0.431     0.438     0.425
incobj         37.721    37.721    37.721
qmin           30.738    30.615    31.259
qmax           81.964    82.987    80.798
amean          55.608    56.179    55.461
amin           54.633    55.190    54.700
amax           56.628    57.385    56.368
emean           0.413     0.432     0.370
emin            0.375     0.404     0.318
emax            0.449     0.454     0.436
imean          38.553    38.128    39.830
imin           37.525    37.341    37.730
imax           39.717    39.027    41.170
excite_mean     0.748     0.754     0.740
fracstop        1.000     1.000     1.000
cjmean          2.475     2.474     2.478

libcent 0      -180.0    -180.0     180.0
libamp  0      -180.0    -180.0     140.0
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       189.4     179.7     264.4
kozaiamp        180.0     180.0      23.1