Orbit Fit and Astrometric record for 14QF442

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: 14QF442   
# Created Mon Oct 23 01:38:28 2017
# Orbit generated from Bernstein formalism
# Fitting   14 observations of   14
# Arc:   2.13y
# First observation: 2014/08/16
#  Last observation: 2016/10/02
Preliminary a, adot, b, bdot, g, gdot:
  -0.000003   0.031221  -0.000002  -0.001161   0.027574   0.000000
# Chi-squared of fit:     3.94 DOF:   22 RMS:  0.09
# Min/Max residuals:    -0.16    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.796506E-05  3.153610E-02 -2.853259E-07 -1.161221E-03  2.784705E-02  1.906800E-03
# Covariance matrix:
  3.1390E-13  6.1413E-13 -4.1568E-14 -4.0290E-15  6.0703E-13  1.1899E-11
  6.1413E-13  4.9144E-11 -8.6380E-13  1.0784E-12  1.4288E-11  9.2475E-10
 -4.1568E-14 -8.6380E-13  2.1757E-13 -1.0879E-13 -3.5844E-13 -1.5895E-11
 -4.0290E-15  1.0784E-12 -1.0879E-13  1.2942E-13  2.4212E-13  2.0600E-11
  6.0703E-13  1.4288E-11 -3.5844E-13  2.4212E-13  5.6332E-12  2.6401E-10
  1.1899E-11  9.2475E-10 -1.5895E-11  2.0600E-11  2.6401E-10  1.7457E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
  -31.260486  -41.333419   -0.078414   -0.525231   -0.865422  2456885.726878
# Heliocentric elements and errors
Epoch:              2456880.5000  =  2014/08/11
Mean Anomaly:           13.70579 +/-     0.802
Argument of Peri:      245.35162 +/-     1.282
Long of Asc Node:       52.94158 +/-     0.005
Inclination:            30.50934 +/-     0.000
Eccentricity:         0.20495888 +/-    0.0020
Semi-Major Axis:     45.73153845 +/-    0.0478
Time of Perihelion: 2452579.9531 +/-     251.6
Perihelion:          36.35845363 +/-    0.1009
Aphelion:            55.10462328 +/-    0.1098
Period (y)              309.2658 +/-      0.48
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           23.85974796 +/-    0.0020
Ecliptic Y          -20.88112803 +/-    0.0017
Ecliptic Z          -18.63500046 +/-    0.0016
Ecliptic XDOT         0.00211867 +/-    0.0000
Ecliptic YDOT         0.00225716 +/-    0.0000
Ecliptic ZDOT        -0.00019476 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.77733436 +/-    0.0018
Geocenter to KBO     35.91044446 +/-    0.0031
# Hcoef:  7.83

The following table shows the complete astrometric record for 14QF442. 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 (14QF442) followed by the observatory code and reference code for the source of the astrometry.

2014 08  16.226100 22 16 26.11   -44 28 52.5   22.8i 14QF442   W84  C~2Bnh      
2014 08  17.217072 22 16 19.26   -44 29 21.6   23.7g 14QF442   W84  C~2Bnh      
2014 08  18.224826 22 16 12.30   -44 29 50.3   23.3r 14QF442   W84  C~2Bnh      
2014 08  20.210637 22 15 58.51   -44 30 44.2   23.0r 14QF442   W84  C~2Bnh      
2014 08  22.209838 22 15 44.55   -44 31 34.9   23.0r 14QF442   W84  C~2Bnh      
2014 09  24.107731 22 12 06.10   -44 35 56.8   23.0r 14QF442   W84  C~2Bnh      
2014 09  26.110185 22 11 54.57   -44 35 36.1   24.0g 14QF442   W84  C~2Bnh      
2014 10  21.142720 22 10 03.56   -44 25 30.1   23.7g 14QF442   W84  C~2Bnh      
2016 09  12.085833 22 31 31.38   -43 10 08.8   22.4z 14QF442   W84  C~2IY9      
2016 09  24.116725 22 30 15.60   -43 10 27.5   22.8i 14QF442   W84  C~2IY9      
2016 09  24.119502 22 30 15.59   -43 10 27.5   23.6g 14QF442   W84  C~2IY9      
2016 10  02.087731 22 29 30.25   -43 09 14.5   23.3r 14QF442   W84  C~2IY9      
2016 10  02.089097 22 29 30.22   -43 09 14.4   23.4g 14QF442   W84  C~2IY9      
2016 10  02.101516 22 29 30.16   -43 09 14.3   23.0i 14QF442   W84  C~2IY9      

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    -0.01       0.00    -0.08
  2   0.0027    -78.76    -0.15       4.25     0.01
  3   0.0055   -158.40     0.01       9.32    -0.02
  4   0.0109   -314.96     0.11      21.96     0.05
  5   0.0164   -471.80     0.02      38.14     0.16
  6   0.1065  -2707.43     0.17     760.52    -0.11
  7   0.1119  -2811.57     0.01     829.47    -0.11
  8   0.1805  -3653.92    -0.16    1863.25     0.11
  9   2.0749  10884.47    -0.15     -60.93    -0.11
 10   2.1078  10136.99    -0.01     302.50     0.01
 11   2.1079  10136.89     0.05     302.55    -0.04
 12   2.1297   9727.49     0.14     593.66    -0.04
 13   2.1297   9727.25    -0.04     593.90     0.14
 14   2.1297   9726.70     0.01     594.28     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.

14QF442    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        45.962    46.162    45.782
ecceobj         0.209     0.216     0.203
incobj         30.545    30.545    30.544
qmin           35.799    35.605    35.869
qmax           56.504    57.240    56.228
amean          46.009    46.166    45.777
amin           45.597    45.778    45.367
amax           46.475    46.640    46.257
emean           0.200     0.208     0.195
emin            0.182     0.190     0.175
emax            0.218     0.228     0.216
imean          29.679    29.664    29.619
imin           29.315    29.295    29.118
imax           29.970    29.960    30.030
excite_mean     0.534     0.537     0.531
fracstop        1.000     1.000     1.000
cjmean          2.760     2.758     2.761

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       186.8     187.0     194.5
kozaiamp        180.0     180.0     179.9