Orbit Fit and Astrometric record for 15FJ345

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: 15FJ345   
# Created Sun Oct 22 01:38:34 2017
# Orbit generated from Bernstein formalism
# Fitting   13 observations of   13
# Arc:   1.13y
# First observation: 2015/03/17
#  Last observation: 2016/05/03
Preliminary a, adot, b, bdot, g, gdot:
  -0.000019   0.012451   0.000006  -0.007898   0.017407   0.000000
# Chi-squared of fit:    14.64 DOF:   20 RMS:  0.19
# Min/Max residuals:    -0.47    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.061029E-05  1.249447E-02 -5.943758E-06 -7.922385E-03  1.754727E-02  2.760446E-03
# Covariance matrix:
  4.0726E-13  4.4219E-14  3.4655E-14 -3.3801E-13  5.4193E-13  3.7507E-11
  4.4219E-14  1.5485E-12  9.7348E-14 -1.1505E-12  1.0943E-12  1.2818E-10
  3.4655E-14  9.7348E-14  2.3281E-13 -3.4880E-13  1.2147E-13  1.2297E-11
 -3.3801E-13 -1.1505E-12 -3.4880E-13  1.8103E-12 -1.2736E-12 -1.4379E-10
  5.4193E-13  1.0943E-12  1.2147E-13 -1.2736E-12  1.7103E-12  1.4155E-10
  3.7507E-11  1.2818E-10  1.2297E-11 -1.4379E-10  1.4155E-10  1.6015E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
   14.831654 -163.624728    0.338785    0.238752   -0.901138  2457099.027758
# Heliocentric elements and errors
Epoch:              2457090.5000  =  2015/03/09
Mean Anomaly:           54.85382 +/-     0.309
Argument of Peri:       77.71939 +/-     0.595
Long of Asc Node:       37.84908 +/-     0.002
Inclination:            35.01028 +/-     0.003
Eccentricity:         0.20002881 +/-    0.0087
Semi-Major Axis:     63.17897172 +/-    0.2285
Time of Perihelion: 2429141.7986 +/-      42.0
Perihelion:          50.54135741 +/-    0.5782
Aphelion:            75.81658604 +/-    0.6133
Period (y)              502.1888 +/-      2.72
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -53.84844413 +/-    0.0039
Ecliptic Y          -15.46937268 +/-    0.0011
Ecliptic Z           14.58770876 +/-    0.0011
Ecliptic XDOT        -0.00015686 +/-    0.0000
Ecliptic YDOT        -0.00208275 +/-    0.0000
Ecliptic ZDOT        -0.00108458 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   57.89436651 +/-    0.0037
Geocenter to KBO     56.98892467 +/-    0.0042
# Hcoef:  7.97

The following table shows the complete astrometric record for 15FJ345. 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 (15FJ345) followed by the observatory code and reference code for the source of the astrometry.

2015 03  17.52698  13 23 06.241  +07 15 52.00  25.4r 15FJ345   568  C~1u6O      
2015 03  17.58309  13 23 06.061  +07 15 53.16        15FJ345   568  C~1u6O      
2015 03  17.64176  13 23 05.863  +07 15 54.21        15FJ345   568  C~1u6O      
2015 04  18.18881  13 21 17.204  +07 25 23.75  25.5r 15FJ345   304  C~1u6O      
2015 04  19.16841  13 21 13.763  +07 25 37.25        15FJ345   304  C~1u6O      
2015 04  19.26677  13 21 13.396  +07 25 38.71        15FJ345   304  C~1u6O      
2015 06  20.28309  13 18 31.547  +07 26 18.30  25.4r 15FJ345   568  C~1u6O      
2015 06  20.37135  13 18 31.436  +07 26 17.10        15FJ345   568  C~1u6O      
2016 03  09.34083  13 25 26.155  +06 31 39.28        15FJ345   304  C~1u6O      
2016 03  10.25282  13 25 23.520  +06 31 58.60        15FJ345   304  C~1u6O      
2016 03  10.30042  13 25 23.365  +06 31 59.51        15FJ345   304  C~1u6O      
2016 05  03.21264  13 22 21.336  +06 46 42.94  25.5r 15FJ345   304  C~2AE2      
2016 05  03.24815  13 22 21.207  +06 46 43.50        15FJ345   304  C~2AE2      

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     0.13       0.00    -0.25
  2   0.0002     -2.92     0.14       0.04    -0.25
  3   0.0003     -6.04     0.08      -0.12    -0.47
  4   0.0867  -1717.34    -0.20     -95.48     0.09
  5   0.0894  -1769.79     0.03    -102.65     0.21
  6   0.0896  -1775.39    -0.22    -103.40     0.24
  7   0.2594  -4014.75     0.05    -989.14     0.34
  8   0.2597  -4015.82    -0.01    -990.88     0.30
  9   0.9796   2945.01     0.11   -1645.26    -0.04
 10   0.9821   2901.32    -0.02   -1642.59     0.06
 11   0.9823   2898.83    -0.17   -1642.64    -0.10
 12   1.1299     55.47     0.17   -1871.70    -0.15
 13   1.1300     53.49    -0.07   -1871.92     0.04

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.

15FJ345    quality flag:2

Type:       SCATNEAR  SCATNEAR  SCATEXTD

axisobj        62.495    63.194    61.893
ecceobj         0.196     0.221     0.171
incobj         35.139    35.134    35.144
qmin           49.654    48.686    50.767
qmax           76.579    79.106    74.279
amean          62.827    63.527    62.236
amin           62.194    62.897    61.645
amax           63.552    64.263    62.887
emean           0.192     0.217     0.169
emin            0.177     0.205     0.157
emax            0.206     0.231     0.181
imean          34.573    34.561    34.549
imin           34.344    34.335    34.343
imax           34.839    34.830    34.766
excite_mean     0.599     0.608     0.592
fracstop        1.000     1.000     1.000
cjmean          2.814     2.809     2.818

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       179.7     176.4     182.5
kozaiamp        105.6     103.5     107.1