Orbit Fit and Astrometric record for 13RU124

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: 13RU124   
# Created Tue Apr  1 01:09:35 2025
# Orbit generated from Bernstein formalism
# Fitting     17 observations of     17
# Arc:   4.14y
# First observation: 2013/09/10
#  Last observation: 2017/11/01
Preliminary a, adot, b, bdot, g, gdot:
  -0.000079   0.020565   0.000155  -0.010722   0.023759   0.000000
# Chi-squared of fit:     5.38 DOF:     28 RMS:  0.10
# Min/Max residuals:    -0.17    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.387808E-05  2.008950E-02 -7.129428E-06 -1.044101E-02  2.326673E-02 -5.000350E-03
# Covariance matrix:
  3.7000E-13 -1.4620E-13 -1.5974E-14  3.8688E-14  8.3314E-14 -9.2404E-13
 -1.4620E-13  3.9214E-13  1.3377E-13 -2.1703E-13  3.5369E-13  5.1493E-12
 -1.5974E-14  1.3377E-13  3.5362E-13 -1.9258E-13  1.3840E-13  2.0317E-12
  3.8688E-14 -2.1703E-13 -1.9258E-13  1.9430E-13 -1.9998E-13 -3.3613E-12
  8.3314E-14  3.5369E-13  1.3840E-13 -1.9998E-13  6.0746E-13  4.7329E-12
 -9.2404E-13  5.1493E-12  2.0317E-12 -3.3613E-12  4.7329E-12  7.9782E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -16.009822   36.538089    0.760833   -0.182157   -0.635225  2456545.888698
# Heliocentric elements and errors
Epoch:              2456540.5000  =  2013/09/05
Mean Anomaly:          306.72582 +/-     0.024
Argument of Peri:      292.03419 +/-     0.023
Long of Asc Node:      188.23920 +/-     0.001
Inclination:            31.64949 +/-     0.000
Eccentricity:         0.25389888 +/-    0.0004
Semi-Major Axis:     48.51295999 +/-    0.0128
Time of Perihelion: 2474804.6459 +/-       4.1
Perihelion:          36.19557393 +/-    0.0222
Aphelion:            60.83034604 +/-    0.0256
Period (y)              337.9052 +/-      0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.17645839 +/-    0.0011
Ecliptic Y           24.38091223 +/-    0.0008
Ecliptic Z          -11.85424993 +/-    0.0004
Ecliptic XDOT        -0.00214027 +/-    0.0000
Ecliptic YDOT         0.00135974 +/-    0.0000
Ecliptic ZDOT        -0.00101854 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.62318685 +/-    0.0010
Geocenter to KBO     42.97982813 +/-    0.0014
# Hcoef:  6.73

The following table shows the complete astrometric record for 13RU124. 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 (13RU124) followed by the observatory code and reference code for the source of the astrometry.

2013 09  10.38792  02 37 40.02   -01 27 21.6   23.9g 13RU124   W84  C~3clA      
2013 10  29.15647  02 34 43.434  -01 55 06.66  24.1g 13RU124   W84  C~4yQt      
2013 11  13.15868  02 33 36.661  -02 01 30.36  22.2z 13RU124   W84  C~4yQt      
2014 09  24.31584  02 42 13.143  -01 47 38.27  23.2r 13RU124   W84  C~4yQt      
2014 09  30.28134  02 41 53.426  -01 51 15.00  22.9i 13RU124   W84  C~4yQt      
2014 09  30.28271  02 41 53.426  -01 51 15.07  23.2r 13RU124   W84  C~4yQt      
2014 10  03.32170  02 41 42.613  -01 53 04.31  23.4i 13RU124   W84  C~4yQt      
2015 12  05.20075  02 42 30.142  -02 32 06.67  22.9i 13RU124   W84  C~4yQt      
2015 12  05.20212  02 42 30.134  -02 32 06.38  22.6r 13RU124   W84  C~4yQt      
2015 12  05.20349  02 42 30.140  -02 32 06.48  23.5g 13RU124   W84  C~4yQt      
2016 09  23.29999  02 52 44.828  -02 11 46.60  22.9i 13RU124   W84  C~4yQt      
2016 09  24.29987  02 52 41.823  -02 12 24.10  23.3r 13RU124   W84  C~4yQt      
2016 09  25.27102  02 52 38.841  -02 13 00.06  23.1g 13RU124   W84  C~4yQt      
2016 11  29.20823  02 48 06.831  -02 43 38.85  23.1r 13RU124   W84  C~4yQt      
2016 12  05.20580  02 47 42.730  -02 44 46.26  23.1g 13RU124   W84  C~4yQt      
2016 12  23.15168  02 46 42.069  -02 45 51.59  22.8i 13RU124   W84  C~4yQt      
2017 11  01.20361  02 55 33.529  -02 46 15.84  22.6z 13RU124   W84  C~4yQt      

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    -0.05       0.00     0.01
     2   0.1335  -3041.11     0.08    -731.83     0.30
     3   0.1746  -4112.56    -0.02    -775.90    -0.17
     4   1.0374   3491.13     0.05   -2463.36    -0.03
     5   1.0538   3141.58    -0.03   -2574.01    -0.03
     6   1.0538   3141.56     0.03   -2574.08    -0.08
     7   1.0621   2952.95     0.03   -2625.66    -0.06
     8   2.2336   2877.88    -0.15   -5073.91    -0.17
     9   2.2336   2877.86    -0.09   -5073.60     0.13
    10   2.2336   2877.92     0.04   -5073.72    -0.01
    11   3.0360  12012.48     0.16   -6883.98     0.07
    12   3.0388  11957.57    -0.05   -6905.00    -0.09
    13   3.0414  11903.49    -0.15   -6924.67     0.17
    14   3.2192   7440.13    -0.04   -7352.70    -0.00
    15   3.2356   7075.80     0.07   -7300.21    -0.05
    16   3.2848   6192.52     0.10   -7069.31     0.04
    17   4.1419  13751.16     0.01   -9669.24    -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.

13RU124    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        48.662    48.695    48.628
ecceobj         0.252     0.253     0.251
incobj         31.554    31.554    31.554
qmin           35.626    35.555    35.668
qmax           61.658    61.617    61.456
amean          48.308    48.338    48.275
amin           47.857    47.887    47.805
amax           48.861    48.866    48.828
emean           0.241     0.242     0.239
emin            0.221     0.222     0.220
emax            0.262     0.262     0.259
imean          31.774    31.772    31.791
imin           31.298    31.287    31.308
imax           32.274    32.276    32.310
excite_mean     0.579     0.579     0.579
fracstop        1.000     1.000     1.000
cjmean          2.714     2.713     2.714

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       172.9     172.8     174.1
kozaiamp        179.9     180.0     180.0