Orbit Fit and Astrometric record for 15RU245

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: 15RU245   
# Created Mon Dec 18 02:38:10 2017
# Orbit generated from Bernstein formalism
# Fitting   33 observations of   33
# Arc:   1.53y
# First observation: 2015/06/23
#  Last observation: 2017/01/02
Preliminary a, adot, b, bdot, g, gdot:
   0.000076   0.066027  -0.000071  -0.015838   0.045985   0.000000
# Chi-squared of fit:     5.27 DOF:   60 RMS:  0.07
# Min/Max residuals:    -0.16    0.25
# Exact a, adot, b, bdot, g, gdot:
  2.180221E-05  6.288889E-02 -5.317571E-06 -1.532558E-02  4.379098E-02 -5.019463E-03
# Covariance matrix:
  2.4877E-13  3.3566E-13  3.5410E-14 -1.8287E-13  3.4057E-13  7.2994E-12
  3.3566E-13  2.2002E-12  2.0890E-13 -1.0793E-12  1.3735E-12  4.2864E-11
  3.5410E-14  2.0890E-13  1.2367E-13 -2.0076E-13  1.3117E-13  4.4904E-12
 -1.8287E-13 -1.0793E-12 -2.0076E-13  7.1126E-13 -6.7765E-13 -2.3203E-11
  3.4057E-13  1.3735E-12  1.3117E-13 -6.7765E-13  9.6954E-13  2.6949E-11
  7.2994E-12  4.2864E-11  4.4904E-12 -2.3203E-11  2.6949E-11  9.2059E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.233984    7.326098    1.011501   -0.000313    0.098970  2457197.032948
# Heliocentric elements and errors
Epoch:              2457190.5000  =  2015/06/17
Mean Anomaly:          342.74952 +/-     0.051
Argument of Peri:      210.81728 +/-     0.103
Long of Asc Node:      185.73821 +/-     0.000
Inclination:            13.76634 +/-     0.000
Eccentricity:         0.28837089 +/-    0.0003
Semi-Major Axis:     30.90251296 +/-    0.0054
Time of Perihelion: 2460197.1841 +/-       8.9
Perihelion:          21.99112790 +/-    0.0095
Aphelion:            39.81389802 +/-    0.0112
Period (y)              171.7904 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           22.67648853 +/-    0.0005
Ecliptic Y            1.89638526 +/-    0.0001
Ecliptic Z            0.09319510 +/-    0.0000
Ecliptic XDOT        -0.00081122 +/-    0.0000
Ecliptic YDOT         0.00385402 +/-    0.0000
Ecliptic ZDOT        -0.00095938 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   22.75583649 +/-    0.0005
Geocenter to KBO     22.83575186 +/-    0.0005
# Hcoef:  9.36

The following table shows the complete astrometric record for 15RU245. 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 (15RU245) followed by the observatory code and reference code for the source of the astrometry.

2015 06  23.53217  00 26 32.347  +03 07 20.70  23.3r 15RU245   568  C~2Gdr      
2015 06  23.55117  00 26 32.398  +03 07 20.96  23.3r 15RU245   568  C~2Gdr      
2015 07  14.59185  00 27 08.684  +03 08 07.82  23.2r 15RU245   568  C~2Gdr      
2015 07  19.57093  00 27 07.137  +03 07 12.58  23.2r 15RU245   568  C~2Gdr      
2015 09  08.37633  00 23 38.143  +02 36 41.89  23.0r 15RU245   568  C~2Gdr      
2015 09  08.48053  00 23 37.417  +02 36 36.32  23.0r 15RU245   568  C~2Gdr      
2015 09  08.52274  00 23 37.128  +02 36 34.05  23.0r 15RU245   568  C~2Gdr      
2015 09  09.49962  00 23 30.474  +02 35 41.47  22.1w 15RU245   568  C~2Gdr      
2015 09  16.42148  00 22 41.759  +02 29 18.54  23.1w 15RU245   568  C~2Gdr      
2015 10  03.33607  00 20 36.581  +02 13 01.73  23.1r 15RU245   568  C~2Gdr      
2015 10  03.34821  00 20 36.487  +02 13 00.95  23.3w 15RU245   568  C~2Gdr      
2015 10  03.40228  00 20 36.074  +02 12 57.86  22.5w 15RU245   568  C~2Gdr      
2015 10  07.28650  00 20 07.293  +02 09 13.03  23.0r 15RU245   568  C~2Gdr      
2015 10  07.31809  00 20 07.054  +02 09 11.19  22.9r 15RU245   568  C~2Gdr      
2015 10  07.37159  00 20 06.653  +02 09 08.16  22.2r 15RU245   568  C~2Gdr      
2015 11  05.24319  00 16 57.208  +01 43 58.20  22.8w 15RU245   568  C~2Gdr      
2015 11  07.21299  00 16 46.913  +01 42 32.45  22.4w 15RU245   568  C~2Gdr      
2015 11  07.26547  00 16 46.634  +01 42 30.19  22.6w 15RU245   568  C~2Gdr      
2015 11  10.33048  00 16 31.484  +01 40 22.65  22.9w 15RU245   568  C~2Gdr      
2015 11  10.34252  00 16 31.434  +01 40 22.19  22.6w 15RU245   568  C~2Gdr      
2016 09  07.47209  00 39 05.227  +03 15 24.96        15RU245   568  C~2Gdr      
2016 09  07.51840  00 39 04.913  +03 15 22.55        15RU245   568  C~2Gdr      
2016 09  26.54877  00 36 49.900  +02 57 35.96  23.1w 15RU245   568  C~2Gdr      
2016 10  29.31731  00 32 53.125  +02 27 09.87        15RU245   568  C~2Gdr      
2016 10  29.38315  00 32 52.683  +02 27 06.59        15RU245   568  C~2Gdr      
2016 11  03.38568  00 32 21.831  +02 23 06.73        15RU245   568  C~2Gdr      
2016 11  03.44362  00 32 21.482  +02 23 03.88        15RU245   568  C~2Gdr      
2016 11  03.45063  00 32 21.435  +02 23 03.70        15RU245   568  C~2Gdr      
2016 12  25.25628  00 30 15.873  +02 03 29.07        15RU245   568  C~2Gdr      
2016 12  25.27553  00 30 15.925  +02 03 29.32        15RU245   568  C~2Gdr      
2016 12  26.23936  00 30 17.617  +02 03 34.24        15RU245   568  C~2Gdr      
2016 12  29.22742  00 30 23.908  +02 03 55.93        15RU245   568  C~2Gdr      
2017 01  02.29869  00 30 34.900  +02 04 41.18        15RU245   568  C~2Gdr      

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     0.19       0.00    -0.04
  2   0.0001      0.80     0.04      -0.06     0.03
  3   0.0577    518.59    -0.04    -171.72     0.08
  4   0.0713    475.48    -0.02    -213.31     0.01
  5   0.2104  -3124.43    -0.05    -657.05     0.02
  6   0.2107  -3136.63    -0.11    -657.86     0.05
  7   0.2108  -3141.51    -0.05    -658.24     0.02
  8   0.2135  -3253.91    -0.04    -667.07     0.03
  9   0.2324  -4076.13    -0.01    -729.83    -0.01
 10   0.2787  -6187.02    -0.01    -883.90     0.02
 11   0.2788  -6188.63    -0.06    -884.06    -0.03
 12   0.2789  -6195.54    -0.07    -884.44     0.02
 13   0.2895  -6681.20     0.02    -919.97    -0.03
 14   0.2896  -6685.22    -0.01    -920.24    -0.03
 15   0.2898  -6691.95     0.03    -920.64     0.00
 16   0.3688  -9903.23     0.04   -1181.21    -0.04
 17   0.3742 -10079.35     0.19   -1198.72    -0.05
 18   0.3744 -10084.10     0.14   -1199.14    -0.04
 19   0.3827 -10343.85    -0.16   -1226.15    -0.02
 20   0.3828 -10344.73    -0.03   -1226.28    -0.05
 21   1.2100  10566.15     0.05   -3998.38     0.05
 22   1.2101  10560.86     0.01   -3998.75     0.11
 23   1.2622   8277.13     0.00   -4184.96    -0.00
 24   1.3519   4292.54     0.05   -4467.09    -0.07
 25   1.3521   4285.15    -0.10   -4467.50    -0.02
 26   1.3658   3765.37     0.01   -4505.73     0.05
 27   1.3659   3759.44    -0.02   -4506.29    -0.12
 28   1.3660   3758.72    -0.03   -4506.18     0.04
 29   1.5078   1565.16    -0.12   -4843.63    -0.07
 30   1.5079   1565.97     0.25   -4843.71    -0.05
 31   1.5105   1591.23     0.00   -4849.20     0.07
 32   1.5187   1686.48    -0.02   -4866.48     0.06
 33   1.5298   1855.80    -0.06   -4889.92    -0.00

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.

15RU245    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        31.117    31.141    31.093
ecceobj         0.293     0.293     0.292
incobj         13.716    13.716    13.716
qmin           21.937    21.962    21.891
qmax           40.581    40.508    40.557
amean          31.343    31.300    31.132
amin           30.796    30.874    30.715
amax           32.440    32.349    31.581
emean           0.247     0.250     0.212
emin            0.179     0.169     0.067
emax            0.295     0.293     0.294
imean          15.685    15.511    16.825
imin           13.481    13.482    13.481
imax           18.177    18.601    20.432
excite_mean     0.369     0.369     0.366
fracstop        0.020     0.019     0.027
cjmean          2.867     2.867     2.867

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       239.6     240.7     241.0
kozaiamp         23.3      33.6      24.4