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 Sun Oct 22 01:38:34 2017
# Orbit generated from Bernstein formalism
# Fitting    9 observations of    9
# Arc:   0.98y
# First observation: 2015/03/17
#  Last observation: 2016/03/10
Preliminary a, adot, b, bdot, g, gdot:
  -0.000019   0.027114  -0.000000  -0.001157   0.026615   0.000000
# Chi-squared of fit:     4.99 DOF:   12 RMS:  0.13
# Min/Max residuals:    -0.23    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.600280E-05  2.724895E-02 -1.504881E-06 -1.165343E-03  2.674679E-02  4.539202E-03
# Covariance matrix:
  4.8907E-13  4.3554E-12  1.9783E-14 -2.4140E-13  1.8973E-12  1.7132E-10
  4.3554E-12  4.6700E-10  1.6902E-12 -2.3707E-11  1.4239E-10  1.6451E-08
  1.9783E-14  1.6902E-12  2.5697E-13 -4.0017E-13  5.2358E-13  5.9782E-11
 -2.4140E-13 -2.3707E-11 -4.0017E-13  2.3424E-12 -7.2552E-12 -8.3730E-10
  1.8973E-12  1.4239E-10  5.2358E-13 -7.2552E-12  4.4674E-11  5.0440E-09
  1.7132E-10  1.6451E-08  5.9782E-11 -8.3730E-10  5.0440E-09  5.8116E-07
#      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:           66.60485 +/-     1.974
Argument of Peri:       14.71912 +/-     0.469
Long of Asc Node:       98.29338 +/-     0.040
Inclination:            13.58272 +/-     0.002
Eccentricity:         0.16113739 +/-    0.0283
Semi-Major Axis:     39.88551888 +/-    0.4192
Time of Perihelion: 2440067.9499 +/-     427.3
Perihelion:          33.45847033 +/-    1.1832
Aphelion:            46.31256743 +/-    1.2301
Period (y)              251.9017 +/-      3.97
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.41555473 +/-    0.0086
Ecliptic Y          -11.52490281 +/-    0.0029
Ecliptic Z            8.86877437 +/-    0.0022
Ecliptic XDOT         0.00043180 +/-    0.0001
Ecliptic YDOT        -0.00280230 +/-    0.0000
Ecliptic ZDOT        -0.00000557 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.28498479 +/-    0.0080
Geocenter to KBO     37.38766483 +/-    0.0093
# Hcoef:  7.27

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      

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     0.02       0.00     0.17
  2   0.0002     -4.13     0.03       0.43     0.17
  3   0.0003     -8.51    -0.10       0.94     0.23
  4   0.0918  -2604.09     0.02      63.29    -0.19
  5   0.0919  -2607.97     0.09      63.00    -0.23
  6   0.1824  -4823.90     0.01    -277.74    -0.18
  7   0.1825  -4826.35    -0.07    -278.31    -0.04
  8   0.9771   6176.24    -0.15    -321.12    -0.03
  9   0.9826   6045.89     0.15    -299.59     0.11

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:1

Type:       SCATNEAR  CENTAURR CLASSICAL

axisobj        39.530    41.051    38.504
ecceobj         0.159     0.231     0.087
incobj         13.578    13.574    13.583
qmin           32.490    30.160    34.711
qmax           47.071    52.393    42.929
amean          39.458    40.408    38.710
amin           38.908    36.583    38.412
amax           40.066    41.783    39.039
emean           0.123     0.218     0.054
emin            0.041     0.139     0.023
emax            0.178     0.259     0.101
imean          11.710    10.544    12.759
imin            8.618     7.495     9.531
imax           15.313    12.069    16.086
excite_mean     0.239     0.286     0.228
fracstop        1.000     0.187     1.000
cjmean          2.986     2.966     2.980

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       134.0     134.8     180.2
kozaiamp        180.0     179.0     180.0