Orbit Fit and Astrometric record for 15FW392

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: 15FW392   
# Created Thu Oct 19 01:38:34 2017
# Orbit generated from Bernstein formalism
# Fitting   13 observations of   13
# Arc:   0.97y
# First observation: 2015/03/23
#  Last observation: 2016/03/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000002   0.025469  -0.000001  -0.000708   0.024785   0.000000
# Chi-squared of fit:     3.26 DOF:   20 RMS:  0.09
# Min/Max residuals:    -0.29    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.575494E-05  2.549924E-02 -1.272623E-06 -7.095345E-04  2.494117E-02  3.394457E-03
# Covariance matrix:
  2.5400E-13  9.0527E-12  2.0124E-14 -2.3835E-13  3.0383E-12  3.4238E-10
  9.0527E-12  7.4876E-09  1.3296E-11 -1.8665E-10  1.9455E-09  2.7283E-07
  2.0124E-14  1.3296E-11  1.6814E-13 -5.0464E-13  3.4797E-12  4.8478E-10
 -2.3835E-13 -1.8665E-10 -5.0464E-13  5.6267E-12 -4.8558E-11 -6.8022E-09
  3.0383E-12  1.9455E-09  3.4797E-12 -4.8558E-11  5.0977E-10  7.0939E-08
  3.4238E-10  2.7283E-07  4.8478E-10 -6.8022E-09  7.0939E-08  9.9426E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.692500  157.244507   -0.416130    0.042507   -0.901099  2457104.651598
# Heliocentric elements and errors
Epoch:              2457100.5000  =  2015/03/19
Mean Anomaly:           43.73333 +/-     9.790
Argument of Peri:       60.97644 +/-    20.768
Long of Asc Node:       36.36268 +/-     0.099
Inclination:             3.08599 +/-     0.003
Eccentricity:         0.17951724 +/-    0.1177
Semi-Major Axis:     46.11652732 +/-    2.0464
Time of Perihelion: 2443204.3848 +/-    2970.1
Perihelion:          37.83781572 +/-    5.6837
Aphelion:            54.39523892 +/-    5.9424
Period (y)              313.1793 +/-     20.85
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.92897780 +/-    0.0334
Ecliptic Y           15.45636715 +/-    0.0140
Ecliptic Z            1.88342348 +/-    0.0017
Ecliptic XDOT        -0.00143268 +/-    0.0003
Ecliptic YDOT        -0.00244166 +/-    0.0001
Ecliptic ZDOT        -0.00006021 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.00065764 +/-    0.0314
Geocenter to KBO     40.09435257 +/-    0.0363
# Hcoef:  7.23

The following table shows the complete astrometric record for 15FW392. 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 (15FW392) followed by the observatory code and reference code for the source of the astrometry.

2015 03  23.15082  10 39 52.96   +11 20 57.4   23.0R 15FW392   695  C~1zQ0      
2015 03  23.15697  10 39 52.92   +11 20 57.4   22.9R 15FW392   695  C~1zQ0      
2015 03  23.21731  10 39 52.66   +11 20 58.7         15FW392   695  C~1zQ0      
2015 03  23.22247  10 39 52.62   +11 20 59.0         15FW392   695  C~1zQ0      
2015 03  23.27719  10 39 52.41   +11 21 00.2         15FW392   695  C~1zQ0      
2015 03  23.28187  10 39 52.39   +11 21 00.3         15FW392   695  C~1zQ0      
2015 04  15.19942  10 38 28.27   +11 28 09.9   23.0R 15FW392   695  C~1zQ0      
2015 04  15.27604  10 38 28.04   +11 28 11.0         15FW392   695  C~1zQ0      
2015 04  15.34908  10 38 27.82   +11 28 12.0         15FW392   695  C~1zQ0      
2015 04  24.16408  10 38 04.68   +11 29 55.0   23.0R 15FW392   G37  C~1zQ0      
2015 04  24.26513  10 38 04.43   +11 29 55.8         15FW392   G37  C~1zQ0      
2016 03  13.17699  10 46 00.88   +10 41 55.8   23.3R 15FW392   G37  C~1zQ0      
2016 03  13.21732  10 46 00.69   +10 41 56.9         15FW392   G37  C~1zQ0      

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     0.08       0.00     0.17
  2   0.0000     -0.55    -0.04      -0.22    -0.04
  3   0.0002     -4.58     0.02      -0.45    -0.12
  4   0.0002     -5.24    -0.29      -0.39    -0.04
  5   0.0003     -8.55     0.11      -0.43     0.05
  6   0.0004     -8.86     0.12      -0.45     0.05
  7   0.0631  -1316.68    -0.01     -64.00    -0.07
  8   0.0633  -1320.23     0.01     -64.24    -0.01
  9   0.0635  -1323.60     0.02     -64.52    -0.01
 10   0.0876  -1677.65     0.05     -95.77     0.11
 11   0.0879  -1681.36    -0.06     -96.39    -0.10
 12   0.9747   5901.55     0.03    -129.69    -0.01
 13   0.9749   5898.54    -0.03    -129.73     0.02

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.

15FW392    quality flag:1

Type:       SCATNEAR  CENTAURR CLASSICAL

axisobj        45.814    61.879    44.128
ecceobj         0.178     0.520     0.072
incobj          3.089     3.079     3.095
qmin           35.985    29.229    40.136
qmax           56.221   100.440    48.579
amean          45.802    62.630    44.215
amin           45.320    61.106    43.867
amax           46.326    65.317    44.586
emean           0.190     0.522     0.073
emin            0.166     0.510     0.057
emax            0.214     0.539     0.090
imean           2.971     4.086     2.582
imin            1.410     2.847     1.801
imax            4.395     5.743     3.252
excite_mean     0.198     0.527     0.086
fracstop        1.000     0.016     1.000
cjmean          3.075     2.933     3.095

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       173.1     117.1     177.4
kozaiamp        179.9      60.3     180.0