Orbit Fit and Astrometric record for 13RS155

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: 13RS155   
# Created Tue Nov 30 02:11:53 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     14 observations of     14
# Arc:   5.19y
# First observation: 2013/09/01
#  Last observation: 2018/11/09
# Chi-squared of fit:     6.55 DOF:     22 RMS:  0.12
# Min/Max residuals:    -0.24    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.441939E-05  2.106166E-02 -3.332587E-06 -4.775037E-03  2.258939E-02 -5.732599E-03
# Covariance matrix:
  3.4352E-13 -1.9347E-13 -3.0917E-15  1.1430E-14  8.3058E-14 -1.3191E-12
 -1.9347E-13  4.0906E-13  2.7037E-14 -1.1689E-13  9.4674E-13  3.6652E-12
 -3.0917E-15  2.7037E-14  2.9460E-13 -9.6924E-14  1.6339E-13  2.0653E-13
  1.1430E-14 -1.1689E-13 -9.6924E-14  1.0126E-13 -7.4346E-13 -8.6982E-13
  8.3058E-14  9.4674E-13  1.6339E-13 -7.4346E-13  9.3777E-12  4.9511E-12
 -1.3191E-12  3.6652E-12  2.0653E-13 -8.6982E-13  4.9511E-12  3.8726E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -32.630582  -67.226598   -0.722492   -0.380815   -0.594889  2456536.510618
# Heliocentric elements and errors
Epoch:              2456536.5000  =  2013/09/01
Mean Anomaly:          307.83028 +/-     0.064
Argument of Peri:      332.57910 +/-     0.079
Long of Asc Node:       45.74063 +/-     0.001
Inclination:            34.10013 +/-     0.000
Eccentricity:         0.26549159 +/-    0.0004
Semi-Major Axis:     50.28288523 +/-    0.0330
Time of Perihelion: 2475409.6658 +/-     111.9
Perihelion:          36.93320219 +/-    0.0304
Aphelion:            63.63256827 +/-    0.0456
Period (y)              356.5648 +/-      0.35
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           15.37108427 +/-    0.0020
Ecliptic Y          -34.74388474 +/-    0.0047
Ecliptic Z          -23.87063265 +/-    0.0032
Ecliptic XDOT         0.00200021 +/-    0.0000
Ecliptic YDOT         0.00181429 +/-    0.0000
Ecliptic ZDOT        -0.00011261 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.86903111 +/-    0.0041
Geocenter to KBO     44.26879499 +/-    0.0060
# Hcoef:  7.08

The following table shows the complete astrometric record for 13RS155. 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 (13RS155) followed by the observatory code and reference code for the source of the astrometry.

2013 09  01.00984  20 12 50.795  -53 28 32.26  23.8g 13RS155   W84  C~52RK      
2013 09  01.07187  20 12 50.441  -53 28 31.26  23.7r 13RS155   W84  C~52RK      
2013 09  01.07324  20 12 50.434  -53 28 31.22  23.2i 13RS155   W84  C~52RK      
2013 09  03.07365  20 12 39.728  -53 27 56.97  23.3i 13RS155   W84  C~52RK      
2014 09  20.02233  20 19 42.644  -53 17 45.03  24.2r 13RS155   W84  C~52RK      
2015 09  11.05315  20 28 42.388  -53 15 39.22  23.2i 13RS155   W84  C~52RK      
2016 09  09.06913  20 37 13.354  -53 07 43.24  23.0z 13RS155   W84  C~52RK      
2016 09  22.03290  20 36 14.718  -53 02 37.77  22.9r 13RS155   W84  C~52RK      
2016 09  22.03427  20 36 14.706  -53 02 37.77  23.9g 13RS155   W84  C~52RK      
2016 10  01.01136  20 35 45.766  -52 57 56.61  23.4r 13RS155   W84  C~52RK      
2016 10  01.01272  20 35 45.770  -52 57 56.60  24.6g 13RS155   W84  C~52RK      
2017 09  18.05930  20 44 57.315  -52 53 59.49  24.6g 13RS155   W84  C~52RK      
2017 09  27.03065  20 44 21.545  -52 49 53.41  23.7r 13RS155   W84  C~52RK      
2018 11  09.04026  20 52 14.174  -52 07 19.79  24.1g 13RS155   W84  C~52RK      

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     0.11       0.00     0.02
     2   0.0002      0.00    -0.03       0.00     0.02
     3   0.0002      0.00    -0.02       0.00     0.03
     4   0.0057      0.00    -0.11       0.00    -0.06
     5   1.0514      0.00     0.16       0.00    -0.02
     6   2.0261      0.00     0.23       0.00    -0.07
     7   3.0227      0.00    -0.09       0.00     0.18
     8   3.0582      0.00     0.02       0.00    -0.00
     9   3.0582      0.00    -0.08       0.00    -0.04
    10   3.0828      0.00    -0.24       0.00     0.02
    11   3.0828      0.00    -0.12       0.00    -0.01
    12   4.0467      0.00     0.36       0.00     0.09
    13   4.0712      0.00    -0.08       0.00    -0.11
    14   5.1883      0.00    -0.02       0.00    -0.06

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.

13RS155    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        50.479    50.479    50.479
ecceobj         0.269     0.269     0.269
incobj         34.149    34.149    34.149
qmin           35.602    35.599    35.564
qmax           66.123    66.027    66.115
amean          50.506    50.505    50.505
amin           50.051    50.032    50.030
amax           51.111    51.085    51.090
emean           0.274     0.274     0.274
emin            0.254     0.254     0.254
emax            0.294     0.294     0.294
imean          33.088    33.085    33.087
imin           32.675    32.668    32.671
imax           33.603    33.612    33.599
excite_mean     0.611     0.611     0.611
fracstop        1.000     1.000     1.000
cjmean          2.683     2.683     2.683

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       160.1     160.1     160.1
kozaiamp        180.0     180.0     180.0