Orbit Fit and Astrometric record for 15RS245

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: 15RS245   
# Created Thu Nov 15 02:10:12 2018
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:   2.29y
# First observation: 2015/09/12
#  Last observation: 2017/12/26
Preliminary a, adot, b, bdot, g, gdot:
   0.000036   0.029962  -0.000001  -0.001848   0.027812   0.000000
# Chi-squared of fit:    13.77 DOF:   34 RMS:  0.15
# Min/Max residuals:    -0.45    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.661766E-05  2.982509E-02 -9.117479E-09 -1.839776E-03  2.765186E-02  9.876307E-04
# Covariance matrix:
  4.0809E-13 -5.5100E-13 -1.9496E-14  4.0081E-14 -2.1241E-13 -7.5589E-12
 -5.5100E-13  2.4488E-12  1.3013E-13 -2.1536E-13  1.7822E-12  4.0227E-11
 -1.9496E-14  1.3013E-13  3.2411E-13 -1.9730E-13  1.0284E-13  2.2285E-12
  4.0081E-14 -2.1536E-13 -1.9730E-13  1.6213E-13 -1.5383E-13 -3.9653E-12
 -2.1241E-13  1.7822E-12  1.0284E-13 -1.5383E-13  1.5227E-12  2.8584E-11
 -7.5589E-12  4.0227E-11  2.2285E-12 -3.9653E-12  2.8584E-11  7.4324E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -16.169073   38.514004    0.767102   -0.182783   -0.631061  2457277.811391
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:            6.09476 +/-     0.534
Argument of Peri:      249.20393 +/-     0.641
Long of Asc Node:      141.29564 +/-     0.003
Inclination:            16.34401 +/-     0.000
Eccentricity:         0.08748400 +/-    0.0002
Semi-Major Axis:     40.30189617 +/-    0.0034
Time of Perihelion: 2455688.3757 +/-     138.7
Perihelion:          36.77612527 +/-    0.0073
Aphelion:            43.82766708 +/-    0.0075
Period (y)              255.8565 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.16518476 +/-    0.0012
Ecliptic Y           21.43741961 +/-    0.0010
Ecliptic Z          -10.07069503 +/-    0.0005
Ecliptic XDOT        -0.00180691 +/-    0.0000
Ecliptic YDOT         0.00233108 +/-    0.0000
Ecliptic ZDOT        -0.00020213 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.80026482 +/-    0.0011
Geocenter to KBO     36.16393904 +/-    0.0016
# Hcoef:  8.68

The following table shows the complete astrometric record for 15RS245. 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 (15RS245) followed by the observatory code and reference code for the source of the astrometry.

2015 09  12.310602 02 45 04.55   -01 00 29.1   23.7r 15RS245   W84  C~2B04      
2015 09  12.316921 02 45 04.52   -01 00 29.3   23.1z 15RS245   W84  C~2B04      
2015 10  16.303206 02 42 53.89   -01 20 20.2   23.6z 15RS245   W84  C~2B04      
2016 09  22.287778 02 51 10.21   -00 40 57.1   23.6z 15RS245   W84  C~2B04      
2016 10  05.178484 02 50 21.06   -00 48 30.7   23.9r 15RS245   W84  C~2B04      
2016 10  10.173299 02 49 59.13   -00 51 21.0   23.9r 15RS245   W84  C~2B04      
2016 10  10.175648 02 49 59.12   -00 51 21.1   23.8i 15RS245   W84  C~2B04      
2016 10  10.179618 02 49 59.08   -00 51 21.2   23.5z 15RS245   W84  C~2B04      
2016 11  10.096308 02 47 23.19   -01 06 03.4   23.5i 15RS245   W84  C~2B04      
2016 12  01.082419 02 45 37.91   -01 11 26.4   23.2i 15RS245   W84  C~2B04      
2016 12  17.173704 02 44 30.91   -01 12 13.1   23.6i 15RS245   W84  C~2B04      
2016 12  24.046597 02 44 07.94   -01 11 37.7   24.2r 15RS245   W84  C~2B04      
2016 12  24.048958 02 44 07.93   -01 11 37.6   24.0i 15RS245   W84  C~2B04      
2016 12  24.052940 02 44 07.92   -01 11 37.5   23.4z 15RS245   W84  C~2B04      
2017 11  14.196326 02 53 42.727  -00 41 20.92  23.6i 15RS245   W84  C~2g4S      
2017 11  14.200301 02 53 42.711  -00 41 21.35  23.6z 15RS245   W84  C~2g4S      
2017 12  07.097552 02 51 50.011  -00 46 09.54  24.1r 15RS245   W84  C~2g4S      
2017 12  07.099914 02 51 49.986  -00 46 09.57  23.7i 15RS245   W84  C~2g4S      
2017 12  26.082471 02 50 38.031  -00 45 39.10  23.5i 15RS245   W84  C~2g4S      
2017 12  26.086441 02 50 38.024  -00 45 39.05  23.6z 15RS245   W84  C~2g4S      

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     0.09       0.00    -0.22
  2   0.0000     -0.49    -0.09      -0.05    -0.13
  3   0.0931  -2232.95    -0.02    -522.18     0.18
  4   1.0294   5577.89     0.05    -594.76    -0.10
  5   1.0647   4735.53     0.02    -796.05    -0.14
  6   1.0783   4369.74     0.11    -855.37     0.09
  7   1.0783   4369.57     0.12    -855.42     0.06
  8   1.0784   4368.97    -0.18    -855.32     0.20
  9   1.1630   1871.85    -0.01    -965.15     0.22
 10   1.2205    270.82    -0.32    -780.39    -0.45
 11   1.2645   -698.58    -0.03    -511.99     0.26
 12   1.2833  -1014.93     0.08    -371.14     0.01
 13   1.2833  -1015.05     0.07    -371.00     0.10
 14   1.2833  -1015.16     0.13    -370.86     0.15
 15   2.1735   7746.42     0.02   -1331.10     0.10
 16   2.1736   7746.06    -0.02   -1331.43    -0.26
 17   2.2362   6048.14     0.05   -1077.93    -0.01
 18   2.2362   6047.77    -0.16   -1077.84     0.04
 19   2.2882   5031.03     0.01    -712.31    -0.05
 20   2.2882   5030.95     0.09    -712.23    -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.

15RS245    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.730    40.747    40.714
ecceobj         0.097     0.098     0.096
incobj         16.324    16.324    16.324
qmin           35.801    35.902    35.274
qmax           45.218    45.188    45.904
amean          40.424    40.418    40.419
amin           40.077    40.068    40.071
amax           40.779    40.784    40.795
emean           0.094     0.089     0.103
emin            0.075     0.066     0.078
emax            0.110     0.109     0.126
imean          15.328    15.283    15.411
imin           14.285    14.277    14.240
imax           16.829    16.781    17.036
excite_mean     0.281     0.278     0.285
fracstop        1.000     1.000     1.000
cjmean          2.971     2.973     2.968

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       178.7     180.8     182.6
kozaiamp        180.0     180.0     180.0