Orbit Fit and Astrometric record for 15FR345

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: 15FR345   
# Created Thu Sep 20 01:38:40 2018
# Orbit generated from Bernstein formalism
# Fitting   11 observations of   11
# Arc:   3.07y
# First observation: 2015/03/17
#  Last observation: 2018/04/10
Preliminary a, adot, b, bdot, g, gdot:
   0.000003   0.027050  -0.000002  -0.001150   0.026635   0.000000
# Chi-squared of fit:     6.02 DOF:   16 RMS:  0.13
# Min/Max residuals:    -0.22    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.579190E-05  2.722934E-02 -1.543941E-06 -1.164488E-03  2.674076E-02  3.845554E-03
# Covariance matrix:
  4.3316E-13 -7.3408E-13 -1.1138E-16  2.4057E-14  3.3172E-13 -8.7656E-12
 -7.3408E-13  3.2747E-12  1.4268E-14 -1.2883E-13 -2.5516E-13  4.3067E-11
 -1.1138E-16  1.4268E-14  1.9885E-13 -8.3224E-14  6.6927E-15  1.9641E-13
  2.4057E-14 -1.2883E-13 -8.3224E-14  1.1115E-13  3.6196E-15 -1.7531E-12
  3.3172E-13 -2.5516E-13  6.6927E-15  3.6196E-15  7.9649E-13 -3.2208E-12
 -8.7656E-12  4.3067E-11  1.9641E-13 -1.7531E-12 -3.2208E-12  5.8540E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   13.722060 -161.396181    0.374850    0.217958   -0.892081  2457099.023418
# Heliocentric elements and errors
Epoch:              2457090.5000  =  2015/03/09
Mean Anomaly:           69.01385 +/-     0.103
Argument of Peri:       15.21865 +/-     0.052
Long of Asc Node:       98.25633 +/-     0.003
Inclination:            13.58424 +/-     0.000
Eccentricity:         0.13537781 +/-    0.0009
Semi-Major Axis:     39.53440172 +/-    0.0175
Time of Perihelion: 2439684.6630 +/-      23.3
Perihelion:          34.18232109 +/-    0.0394
Aphelion:            44.88648235 +/-    0.0415
Period (y)              248.5827 +/-      0.17
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.42332096 +/-    0.0012
Ecliptic Y          -11.52750883 +/-    0.0004
Ecliptic Z            8.87077314 +/-    0.0003
Ecliptic XDOT         0.00049666 +/-    0.0000
Ecliptic YDOT        -0.00277901 +/-    0.0000
Ecliptic ZDOT        -0.00002234 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.29341646 +/-    0.0011
Geocenter to KBO     37.39609696 +/-    0.0012
# Hcoef:  7.11

The following table shows the complete astrometric record for 15FR345. 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 (15FR345) followed by the observatory code and reference code for the source of the astrometry.

2015 03  17.52264  13 29 26.002  +05 24 52.16  22.7R 15FR345   568  C~1w1E      
2015 03  17.57883  13 29 25.757  +05 24 54.12        15FR345   568  C~1w1E      
2015 03  17.63688  13 29 25.498  +05 24 56.25        15FR345   568  C~1w1E      
2015 04  20.04247  13 26 46.140  +05 42 15.47  22.8R 15FR345   304  C~1w1E      
2015 04  20.09280  13 26 45.892  +05 42 16.67        15FR345   304  C~1w1E      
2015 05  23.13214  13 24 19.811  +05 50 56.61        15FR345   304  C~1w1E      
2015 05  23.17655  13 24 19.645  +05 50 57.01        15FR345   304  C~1w1E      
2016 03  08.40180  13 35 40.106  +04 40 50.06        15FR345   304  C~1w1E      
2016 03  10.40206  13 35 32.600  +04 41 59.56        15FR345   304  C~1w1E      
2018 04  10.28041  13 44 31.746  +03 40 33.76  22.3R 15FR345   G37  C~2bHP      
2018 04  10.35721  13 44 31.369  +03 40 35.87        15FR345   G37  C~2bHP      

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     0.06       0.00     0.18
  2   0.0002     -4.13     0.07       0.43     0.17
  3   0.0003     -8.51    -0.06       0.94     0.23
  4   0.0918  -2604.09    -0.11      63.29    -0.18
  5   0.0919  -2607.97    -0.04      63.00    -0.22
  6   0.1824  -4823.90     0.08    -277.74    -0.22
  7   0.1825  -4826.35    -0.00    -278.31    -0.08
  8   0.9771   6176.24    -0.18    -321.12     0.00
  9   0.9826   6045.89     0.17    -299.59     0.13
 10   3.0657  14932.08    -0.05    -623.54     0.05
 11   3.0659  14926.03     0.05    -623.76    -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.

15FR345    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.185    39.240    39.131
ecceobj         0.133     0.135     0.131
incobj         13.580    13.580    13.580
qmin           33.518    33.525    33.570
qmax           45.989    45.888    45.793
amean          39.458    39.458    39.458
amin           39.033    39.048    39.017
amax           39.918    39.911    39.947
emean           0.131     0.127     0.129
emin            0.107     0.105     0.110
emax            0.153     0.150     0.147
imean          11.973    12.071    12.042
imin           11.335    11.421    11.329
imax           12.677    12.795    12.771
excite_mean     0.245     0.245     0.245
fracstop        1.000     1.000     1.000
cjmean          2.984     2.984     2.983

libcent 0       178.4     180.1     180.2
libamp  0        87.5      75.9     101.8
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       182.5     182.7     184.3
kozaiamp        180.0     180.0     180.0