Orbit Fit and Astrometric record for 13RR98

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: 13RR98    
# Created Fri Dec 15 02:37:53 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   17
# Arc:   3.27y
# First observation: 2013/09/13
#  Last observation: 2016/12/19
Preliminary a, adot, b, bdot, g, gdot:
   0.000338   0.030418  -0.000073  -0.000339   0.027115   0.000000
# Chi-squared of fit:     3.91 DOF:   28 RMS:  0.08
# Min/Max residuals:    -0.17    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.781382E-05  3.103979E-02  2.146723E-07 -3.033232E-04  2.721971E-02  3.971904E-03
# Covariance matrix:
  4.0350E-13 -4.1380E-13  1.8366E-15 -2.3269E-14  3.5464E-14 -3.3824E-12
 -4.1380E-13  8.8439E-13 -6.8370E-14  5.7337E-14  2.3711E-13  8.8659E-12
  1.8366E-15 -6.8370E-14  2.8652E-13 -1.1113E-13 -1.2471E-13 -6.9000E-13
 -2.3269E-14  5.7337E-14 -1.1113E-13  7.1676E-14  8.7349E-15  6.2625E-13
  3.5464E-14  2.3711E-13 -1.2471E-13  8.7349E-15  6.1704E-13  2.3014E-12
 -3.3824E-12  8.8659E-12 -6.9000E-13  6.2625E-13  2.3014E-12  9.6363E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -38.670101  -28.839227   -0.330217   -0.594273   -0.742727  2456548.760813
# Heliocentric elements and errors
Epoch:              2456540.5000  =  2013/09/05
Mean Anomaly:           19.87503 +/-     0.029
Argument of Peri:      233.49166 +/-     0.061
Long of Asc Node:       62.35286 +/-     0.001
Inclination:            37.76251 +/-     0.000
Eccentricity:         0.28326495 +/-    0.0003
Semi-Major Axis:     50.08705771 +/-    0.0120
Time of Perihelion: 2449392.3764 +/-      10.2
Perihelion:          35.89914975 +/-    0.0161
Aphelion:            64.27496567 +/-    0.0206
Period (y)              354.4839 +/-      0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.11860319 +/-    0.0007
Ecliptic Y          -14.00210721 +/-    0.0004
Ecliptic Z          -22.95526558 +/-    0.0007
Ecliptic XDOT         0.00175631 +/-    0.0000
Ecliptic YDOT         0.00259243 +/-    0.0000
Ecliptic ZDOT        -0.00027331 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.48579273 +/-    0.0007
Geocenter to KBO     36.73808113 +/-    0.0011
# Hcoef:  7.52

The following table shows the complete astrometric record for 13RR98. 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 (13RR98) followed by the observatory code and reference code for the source of the astrometry.

2013 09  13.260035 23 27 43.05   -46 18 33.2   23.7g 13RR98    W84  C~2Gib      
2013 09  24.107975 23 26 27.13   -46 20 49.5   23.9g 13RR98    W84  C~2Gib      
2013 11  15.124363 23 22 03.65   -45 59 10.4   22.3z 13RR98    W84  C~2Gib      
2013 12  13.085845 23 21 54.47   -45 29 26.1   22.4z 13RR98    W84  C~2Gib      
2014 09  04.206597 23 37 32.04   -45 20 40.0   22.5i 13RR98    W84  C~2Gib      
2014 09  12.197998 23 36 37.43   -45 24 15.9   22.0z 13RR98    W84  C~2Gib      
2014 09  24.163218 23 35 14.69   -45 27 26.4   22.4i 13RR98    W84  C~2Gib      
2014 09  30.142731 23 34 34.16   -45 27 58.1   22.8r 13RR98    W84  C~2Gib      
2014 11  14.166123 23 30 46.69   -45 09 00.6   22.8i 13RR98    W84  C~2Gib      
2015 08  18.261690 23 47 39.85   -44 12 56.3   22.8r 13RR98    W84  C~2Gib      
2015 10  17.099132 23 41 14.72   -44 31 12.3   22.6i 13RR98    W84  C~2Gib      
2015 10  18.093576 23 41 08.97   -44 30 55.5   22.9r 13RR98    W84  C~2Gib      
2016 09  30.165984 23 51 01.43   -43 36 03.0   22.8r 13RR98    W84  C~2Gib      
2016 09  30.167361 23 51 01.43   -43 36 02.9   22.6i 13RR98    W84  C~2Gib      
2016 09  30.168727 23 51 01.43   -43 36 03.0   23.8g 13RR98    W84  C~2Gib      
2016 10  22.092315 23 48 47.51   -43 33 22.7   23.0r 13RR98    W84  C~2Gib      
2016 12  19.065787 23 46 35.04   -42 45 02.2   22.5i 13RR98    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     0.04       0.00    -0.08
  2   0.0297   -748.31    -0.00     277.49     0.08
  3   0.1721  -2483.83    -0.13    2761.40    -0.14
  4   0.2487  -1695.43     0.15    4365.48     0.12
  5   0.9745   7067.54    -0.09    -215.65     0.08
  6   0.9964   6464.43    -0.00     -94.03    -0.13
  7   1.0292   5622.93     0.04     202.68     0.07
  8   1.0455   5242.82    -0.04     399.07     0.08
  9   1.1688   3778.21    -0.04    2615.22    -0.04
 10   1.9275  14729.98     0.02    -325.98    -0.09
 11   2.0913  10660.54     0.13    1025.62    -0.06
 12   2.0940  10617.75    -0.05    1073.04     0.11
 13   3.0470  17793.94    -0.17     285.96     0.03
 14   3.0470  17793.99    -0.02     286.04     0.07
 15   3.0470  17793.94     0.01     285.96    -0.07
 16   3.1070  16673.06     0.14    1239.95    -0.07
 17   3.2657  17087.17     0.01    4468.21     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.

13RR98    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        50.369    50.408    50.330
ecceobj         0.287     0.288     0.286
incobj         37.795    37.795    37.795
qmin           34.936    34.868    35.035
qmax           66.313    66.422    66.193
amean          50.307    50.341    50.264
amin           49.842    49.862    49.807
amax           50.903    50.922    50.854
emean           0.284     0.285     0.283
emin            0.264     0.261     0.264
emax            0.304     0.305     0.302
imean          36.631    36.635    36.641
imin           36.254    36.214    36.259
imax           37.161    37.263    37.136
excite_mean     0.661     0.661     0.661
fracstop        1.000     1.000     1.000
cjmean          2.587     2.587     2.587

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       196.8     200.8     194.8
kozaiamp        180.0     180.0     180.0