Orbit Fit and Astrometric record for 15FQ345

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: 15FQ345   
# Created Thu Dec 14 02:38:10 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   17
# Arc:   3.19y
# First observation: 2012/03/29
#  Last observation: 2015/06/08
Preliminary a, adot, b, bdot, g, gdot:
  -0.000362   0.035227  -0.000049   0.004712   0.028825   0.000000
# Chi-squared of fit:     8.83 DOF:   28 RMS:  0.13
# Min/Max residuals:    -0.22    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.873990E-05  3.413002E-02  2.310346E-06  4.555750E-03  2.827496E-02 -1.060559E-02
# Covariance matrix:
  4.8847E-13 -3.6892E-13  7.1631E-15 -2.9547E-14 -1.7259E-13 -1.9367E-12
 -3.6892E-13  1.2499E-12 -4.7211E-14  1.7053E-13  4.1028E-13  1.1556E-11
  7.1631E-15 -4.7211E-14  4.1858E-13 -1.5235E-13 -1.0784E-14 -4.7373E-13
 -2.9547E-14  1.7053E-13 -1.5235E-13  8.8020E-14  5.0717E-14  1.6815E-12
 -1.7259E-13  4.1028E-13 -1.0784E-14  5.0717E-14  4.4707E-13  3.2268E-12
 -1.9367E-12  1.1556E-11 -4.7373E-13  1.6815E-12  3.2268E-12  1.1448E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   10.137226 -157.803339    0.227629    0.171671   -0.960237  2456015.960096
# Heliocentric elements and errors
Epoch:              2456010.5000  =  2012/03/24
Mean Anomaly:          346.80849 +/-     0.011
Argument of Peri:      103.03504 +/-     0.032
Long of Asc Node:      149.74659 +/-     0.002
Inclination:            12.43337 +/-     0.000
Eccentricity:         0.55472258 +/-    0.0003
Semi-Major Axis:     71.06733657 +/-    0.0342
Time of Perihelion: 2464029.0437 +/-       3.1
Perihelion:          31.64468018 +/-    0.0262
Aphelion:           110.48999296 +/-    0.0573
Period (y)              599.1192 +/-      0.43
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.22089909 +/-    0.0008
Ecliptic Y          -13.30925564 +/-    0.0003
Ecliptic Z            6.22491851 +/-    0.0001
Ecliptic XDOT         0.00225150 +/-    0.0000
Ecliptic YDOT        -0.00264481 +/-    0.0000
Ecliptic ZDOT         0.00025360 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.32511572 +/-    0.0007
Geocenter to KBO     35.36698066 +/-    0.0008
# Hcoef:  6.78

The following table shows the complete astrometric record for 15FQ345. 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 (15FQ345) followed by the observatory code and reference code for the source of the astrometry.

2012 03  29.45933  13 37 08.023  +00 46 35.72  22.5w 15FQ345   F51  C~1vYW      
2012 03  29.47369  13 37 07.944  +00 46 36.26  22.7w 15FQ345   F51  C~1vYW      
2012 03  29.48807  13 37 07.880  +00 46 36.67  22.8w 15FQ345   F51  C~1vYW      
2014 02  28.50786  13 54 35.951  -00 29 04.46  22.4w 15FQ345   F51  C~1vYW      
2014 02  28.51908  13 54 35.918  -00 29 04.26  22.5w 15FQ345   F51  C~1vYW      
2014 02  28.53030  13 54 35.901  -00 29 03.85  22.6w 15FQ345   F51  C~1vYW      
2014 02  28.54158  13 54 35.841  -00 29 03.45  22.4w 15FQ345   F51  C~1vYW      
2015 03  24.61230  14 01 14.474  -00 45 31.15  22.2w 15FQ345   F51  C~1vYW      
2015 03  24.62987  14 01 14.413  -00 45 30.77  22.2w 15FQ345   F51  C~1vYW      
2015 03  24.63580  14 01 14.392  -00 45 30.63  22.0w 15FQ345   F51  C~1vYW      
2015 04  21.42566  13 59 00.374  -00 29 49.01  22.1w 15FQ345   F51  C~1vYW      
2015 04  21.43921  13 59 00.292  -00 29 48.55  22.3w 15FQ345   F51  C~1vYW      
2015 04  21.46740  13 59 00.157  -00 29 48.04  22.1w 15FQ345   F51  C~1vYW      
2015 06  08.27431  13 55 27.946  -00 14 41.56  22.5w 15FQ345   F51  C~1vYW      
2015 06  08.28604  13 55 27.914  -00 14 41.50  22.4w 15FQ345   F51  C~1vYW      
2015 06  08.29777  13 55 27.896  -00 14 41.69  22.2w 15FQ345   F51  C~1vYW      
2015 06  08.30961  13 55 27.843  -00 14 41.51  22.3w 15FQ345   F51  C~1vYW      

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     0.07       0.00     0.05
  2   0.0000     -1.30    -0.09       0.07     0.02
  3   0.0001     -2.34     0.01       0.09    -0.04
  4   1.9194  16319.61    -0.00    1575.84     0.06
  5   1.9194  16319.07     0.03    1575.85    -0.10
  6   1.9194  16318.68     0.20    1576.14     0.01
  7   1.9195  16317.69    -0.22    1576.18    -0.12
  8   2.9847  22293.40    -0.21    2869.77     0.25
  9   2.9847  22292.40     0.10    2869.79     0.11
 10   2.9847  22292.05     0.20    2869.80     0.07
 11   3.0608  20052.89    -0.04    3003.64     0.08
 12   3.0609  20051.57    -0.22    3003.62     0.06
 13   3.0609  20049.48     0.08    3003.34    -0.20
 14   3.1918  16729.63    -0.15    2669.24    -0.04
 15   3.1919  16729.16    -0.08    2669.11    -0.00
 16   3.1919  16728.98     0.29    2668.84    -0.12
 17   3.1919  16728.16     0.03    2668.71    -0.09

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.

15FQ345    quality flag:2

Type:       SCATNEAR  CENTAURS  SCATNEAR

axisobj        70.759    70.842    70.677
ecceobj         0.553     0.554     0.553
incobj         12.446    12.445    12.446
qmin           31.157    29.928    31.099
qmax          120.945   118.843   120.333
amean          72.660    63.408    72.452
amin           68.877    54.643    67.092
amax           76.567    75.450    76.261
emean           0.551     0.504     0.555
emin            0.521     0.419     0.508
emax            0.580     0.577     0.581
imean          13.581    11.143    12.368
imin           11.298     8.215    10.365
imax           15.270    13.550    14.594
excite_mean     0.599     0.540     0.595
fracstop        1.000     1.000     1.000
cjmean          2.933     2.930     2.935

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       173.0     183.3     180.1
kozaiamp        180.0     179.9     180.0