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 Tue Dec 12 02:38:14 2017
# Orbit generated from Bernstein formalism
# Fitting   14 observations of   14
# Arc:   1.28y
# First observation: 2015/09/12
#  Last observation: 2016/12/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000014   0.030003  -0.000004  -0.001845   0.027783   0.000000
# Chi-squared of fit:    11.29 DOF:   22 RMS:  0.16
# Min/Max residuals:    -0.49    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.656351E-05  2.982492E-02 -3.536694E-07 -1.839297E-03  2.765165E-02  9.787132E-04
# Covariance matrix:
  7.1388E-13  1.2576E-12  4.8798E-14 -1.7762E-13  1.7237E-12  6.1302E-11
  1.2576E-12  1.4234E-11  4.0565E-13 -1.4053E-12  1.4154E-11  4.8489E-10
  4.8798E-14  4.0565E-13  5.1146E-13 -4.6932E-13  4.1801E-13  1.4074E-11
 -1.7762E-13 -1.4053E-12 -4.6932E-13  6.1201E-13 -1.4379E-12 -5.0820E-11
  1.7237E-12  1.4154E-11  4.1801E-13 -1.4379E-12  1.4560E-11  4.9614E-10
  6.1302E-11  4.8489E-10  1.4074E-11 -5.0820E-11  4.9614E-10  1.7539E-08
#      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:            5.91937 +/-     2.609
Argument of Peri:      249.41736 +/-     3.131
Long of Asc Node:      141.29231 +/-     0.006
Inclination:            16.34381 +/-     0.000
Eccentricity:         0.08743865 +/-    0.0006
Semi-Major Axis:     40.30169142 +/-    0.0036
Time of Perihelion: 2455733.9157 +/-     677.2
Perihelion:          36.77776591 +/-    0.0256
Aphelion:            43.82561693 +/-    0.0257
Period (y)              255.8545 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.16538276 +/-    0.0038
Ecliptic Y           21.43757469 +/-    0.0030
Ecliptic Z          -10.07078092 +/-    0.0014
Ecliptic XDOT        -0.00180756 +/-    0.0000
Ecliptic YDOT         0.00233056 +/-    0.0000
Ecliptic ZDOT        -0.00020184 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.80053020 +/-    0.0034
Geocenter to KBO     36.16420451 +/-    0.0050
# Hcoef:  8.63

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      

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     0.10       0.00    -0.14
  2   0.0000     -0.49    -0.08      -0.05    -0.06
  3   0.0931  -2232.95    -0.02    -522.18     0.24
  4   1.0294   5577.89     0.05    -594.76    -0.12
  5   1.0647   4735.53     0.01    -796.05    -0.17
  6   1.0783   4369.74     0.10    -855.37     0.06
  7   1.0783   4369.57     0.11    -855.42     0.03
  8   1.0784   4368.97    -0.19    -855.32     0.17
  9   1.1630   1871.85    -0.02    -965.15     0.18
 10   1.2205    270.82    -0.32    -780.39    -0.49
 11   1.2645   -698.58    -0.03    -511.99     0.21
 12   1.2833  -1014.93     0.08    -371.14    -0.04
 13   1.2833  -1015.05     0.07    -371.00     0.05
 14   1.2833  -1015.16     0.13    -370.86     0.10

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    40.789    40.683
ecceobj         0.097     0.101     0.094
incobj         16.324    16.325    16.323
qmin           35.914    35.544    35.675
qmax           45.210    45.721    45.309
amean          40.428    40.473    40.366
amin           40.064    40.133    40.034
amax           40.794    40.827    40.712
emean           0.089     0.099     0.094
emin            0.066     0.076     0.072
emax            0.110     0.120     0.113
imean          15.336    15.332    15.377
imin           14.288    14.238    14.265
imax           16.860    16.848    16.935
excite_mean     0.279     0.282     0.281
fracstop        1.000     1.000     1.000
cjmean          2.972     2.971     2.970

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       182.4     183.7     184.9
kozaiamp        180.0     179.9     180.0