Orbit Fit and Astrometric record for 13RX155

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: 13RX155   
# Created Thu Dec  9 02:11:47 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     18 observations of     18
# Arc:   5.18y
# First observation: 2013/09/02
#  Last observation: 2018/11/08
# Chi-squared of fit:     5.49 DOF:     30 RMS:  0.10
# Min/Max residuals:    -0.19    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.566203E-05  2.532690E-02 -8.391911E-06 -1.337846E-02  2.662067E-02  5.967812E-03
# Covariance matrix:
  4.5305E-13 -8.5778E-14 -1.2769E-14  1.6513E-14  2.7752E-13 -2.5188E-13
 -8.5778E-14  2.6633E-13  8.2951E-14 -1.4713E-13  2.0447E-13  2.2321E-12
 -1.2769E-14  8.2951E-14  2.6332E-13 -1.1094E-13  6.4389E-14  7.6537E-13
  1.6513E-14 -1.4713E-13 -1.1094E-13  1.1374E-13 -1.2271E-13 -1.3570E-12
  2.7752E-13  2.0447E-13  6.4389E-14 -1.2271E-13  5.8708E-13  1.8598E-12
 -2.5188E-13  2.2321E-12  7.6537E-13 -1.3570E-12  1.8598E-12  2.0587E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.741185    0.327619    0.356647   -0.045109   -0.943942  2456537.779618
# Heliocentric elements and errors
Epoch:              2456538.5000  =  2013/09/03
Mean Anomaly:           36.23181 +/-     0.012
Argument of Peri:      126.40779 +/-     0.024
Long of Asc Node:      174.75303 +/-     0.000
Inclination:            27.96188 +/-     0.000
Eccentricity:         0.25988084 +/-    0.0002
Semi-Major Axis:     46.77854840 +/-    0.0067
Time of Perihelion: 2444777.1803 +/-       4.7
Perihelion:          34.62170010 +/-    0.0089
Aphelion:            58.93539670 +/-    0.0112
Period (y)              319.9472 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           38.46798207 +/-    0.0011
Ecliptic Y           -0.13362031 +/-    0.0000
Ecliptic Z           -1.79684046 +/-    0.0001
Ecliptic XDOT         0.00052617 +/-    0.0000
Ecliptic YDOT         0.00260678 +/-    0.0000
Ecliptic ZDOT        -0.00140357 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.51003043 +/-    0.0011
Geocenter to KBO     37.56469850 +/-    0.0011
# Hcoef:  7.25

The following table shows the complete astrometric record for 13RX155. 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 (13RX155) followed by the observatory code and reference code for the source of the astrometry.

2013 09  02.27884  00 05 33.971  -02 23 04.37  24.0g 13RX155   W84  C~52RL      
2013 10  13.12737  00 02 27.415  -02 48 51.73  22.7i 13RX155   W84  C~52RL      
2013 10  13.12878  00 02 27.413  -02 48 51.50  22.9z 13RX155   W84  C~52RL      
2013 11  23.10292  00 00 15.268  -03 06 29.09  23.0i 13RX155   W84  C~52RL      
2014 08  18.30134  00 13 02.838  -02 21 24.41  22.3i 13RX155   W84  C~52RL      
2014 10  29.18375  00 07 54.111  -03 04 35.69  23.7r 13RX155   W84  C~52RL      
2014 11  14.10424  00 07 03.272  -03 11 04.07  22.3z 13RX155   W84  C~52RL      
2014 11  17.01999  00 06 55.945  -03 12 00.00  23.1z 13RX155   W84  C~52RL      
2015 11  02.09371  00 14 06.442  -03 13 24.85  23.3r 13RX155   W84  C~52RL      
2016 11  25.09132  00 19 19.330  -03 28 10.36  23.4i 13RX155   W84  C~52RL      
2016 12  05.10133  00 19 04.174  -03 29 45.18  22.9z 13RX155   W84  C~52RL      
2017 09  26.29753  00 29 23.187  -03 07 01.22  22.5r 13RX155   W84  C~52RL      
2017 09  26.30165  00 29 23.183  -03 07 01.22  22.9i 13RX155   W84  C~52RL      
2017 09  27.26030  00 29 18.757  -03 07 37.54  23.7g 13RX155   W84  C~52RL      
2017 10  17.23932  00 27 47.556  -03 19 29.02  23.4r 13RX155   W84  C~52RL      
2018 09  09.34532  00 36 52.627  -03 02 38.28  23.3r 13RX155   W84  C~52RL      
2018 10  28.20656  00 33 15.723  -03 31 26.85  22.9i 13RX155   W84  C~52RL      
2018 11  08.17113  00 32 34.263  -03 36 06.97  23.1r 13RX155   W84  C~52RL      

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    -0.15       0.00     0.03
     2   0.1118      0.00     0.04       0.00    -0.13
     3   0.1118      0.00     0.10       0.00     0.15
     4   0.2240      0.00     0.01       0.00    -0.04
     5   0.9583      0.00     0.07       0.00     0.08
     6   1.1551      0.00    -0.03       0.00    -0.07
     7   1.1987      0.00     0.07       0.00    -0.08
     8   1.2067      0.00    -0.05       0.00    -0.01
     9   2.1651      0.00    -0.01       0.00    -0.14
    10   3.2302      0.00    -0.19       0.00     0.25
    11   3.2576      0.00     0.17       0.00     0.05
    12   4.0658      0.00    -0.13       0.00     0.00
    13   4.0658      0.00     0.10       0.00     0.16
    14   4.0684      0.00     0.04       0.00     0.05
    15   4.1231      0.00     0.05       0.00    -0.03
    16   5.0187      0.00    -0.01       0.00    -0.10
    17   5.1524      0.00     0.00       0.00    -0.08
    18   5.1825      0.00     0.01       0.00    -0.05

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.

13RX155    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        47.048    47.049    47.048
ecceobj         0.264     0.264     0.264
incobj         27.891    27.891    27.891
qmin           33.793    33.800    33.820
qmax           60.438    60.333    60.415
amean          46.854    46.815    46.853
amin           46.424    46.329    46.448
amax           47.404    47.389    47.400
emean           0.257     0.256     0.257
emin            0.238     0.237     0.239
emax            0.277     0.275     0.276
imean          27.634    27.637    27.632
imin           27.055    27.069    27.031
imax           28.161    28.180    28.127
excite_mean     0.530     0.530     0.530
fracstop        1.000     1.000     1.000
cjmean          2.778     2.778     2.778

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       182.7     183.0     181.5
kozaiamp        180.0     180.0     180.0