Orbit Fit and Astrometric record for 14QG442

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: 14QG442   
# Created Sun Dec 17 02:38:05 2017
# Orbit generated from Bernstein formalism
# Fitting   12 observations of   12
# Arc:   1.37y
# First observation: 2014/08/19
#  Last observation: 2016/01/02
Preliminary a, adot, b, bdot, g, gdot:
   0.000006   0.027530   0.000036   0.008340   0.026232   0.000000
# Chi-squared of fit:     7.37 DOF:   18 RMS:  0.14
# Min/Max residuals:    -0.30    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.723597E-05  2.691444E-02  5.517150E-06  8.354522E-03  2.578882E-02  6.946889E-03
# Covariance matrix:
  1.0737E-12 -9.4001E-13 -6.3661E-14  3.1704E-12  2.4763E-12  3.3979E-10
 -9.4001E-13  1.4477E-11  2.8763E-12 -1.7643E-11 -3.4775E-12 -1.7807E-09
 -6.3661E-14  2.8763E-12  7.9865E-13 -3.5510E-12 -4.6108E-13 -3.3772E-10
  3.1704E-12 -1.7643E-11 -3.5510E-12  2.8491E-11  1.0468E-11  2.8857E-09
  2.4763E-12 -3.4775E-12 -4.6108E-13  1.0468E-11  7.1515E-12  1.1110E-09
  3.3979E-10 -1.7807E-09 -3.3772E-10  2.8857E-09  1.1110E-09  2.9705E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
  -26.201095   41.362440    0.981076   -0.114354   -0.232693  2456888.925361
# Heliocentric elements and errors
Epoch:              2456880.5000  =  2014/08/11
Mean Anomaly:           27.80768 +/-     0.908
Argument of Peri:      246.20271 +/-     2.297
Long of Asc Node:       95.98705 +/-     0.004
Inclination:            30.43045 +/-     0.001
Eccentricity:         0.32561568 +/-    0.0189
Semi-Major Axis:     52.04881501 +/-    0.7415
Time of Perihelion: 2446286.0864 +/-     261.4
Perihelion:          35.10090456 +/-    1.1044
Aphelion:            68.99672546 +/-    1.3914
Period (y)              375.5126 +/-      8.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.95339209 +/-    0.0027
Ecliptic Y           22.42844211 +/-    0.0024
Ecliptic Z          -17.12053385 +/-    0.0018
Ecliptic XDOT        -0.00110250 +/-    0.0000
Ecliptic YDOT         0.00283635 +/-    0.0000
Ecliptic ZDOT         0.00047031 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.02093079 +/-    0.0025
Geocenter to KBO     38.77649304 +/-    0.0040
# Hcoef:  7.30

The following table shows the complete astrometric record for 14QG442. 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 (14QG442) followed by the observatory code and reference code for the source of the astrometry.

2014 08  19.424583 03 07 35.84   -09 44 36.9   22.6i 14QG442   W84  C~2Bnh      
2014 09  27.311204 03 06 28.65   -10 08 57.2   22.8g 14QG442   W84  C~2Bnh      
2014 09  27.312581 03 06 28.64   -10 08 57.4   22.6r 14QG442   W84  C~2Bnh      
2014 09  27.313947 03 06 28.63   -10 08 57.5   22.5i 14QG442   W84  C~2Bnh      
2014 10  21.357396 03 04 47.98   -10 21 59.4   22.6r 14QG442   W84  C~2Bnh      
2014 10  21.358762 03 04 47.97   -10 21 59.5   22.8i 14QG442   W84  C~2Bnh      
2014 10  21.361505 03 04 47.96   -10 21 59.2   23.1z 14QG442   W84  C~2Bnh      
2014 10  23.350498 03 04 38.32   -10 22 51.9   23.4g 14QG442   W84  C~2Bnh      
2014 10  23.351852 03 04 38.32   -10 22 51.8   22.3i 14QG442   W84  C~2Bnh      
2016 01  02.122222 03 04 43.96   -09 26 49.0   22.7r 14QG442   W84  C~2Bnh      
2016 01  02.123576 03 04 43.97   -09 26 48.9   22.4i 14QG442   W84  C~2Bnh      
2016 01  02.124942 03 04 43.93   -09 26 49.0   22.7g 14QG442   W84  C~2Bnh      

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    -0.15       0.00    -0.08
  2   0.1065  -1387.99     0.24   -1091.59     0.08
  3   0.1065  -1388.19     0.12   -1091.74    -0.04
  4   0.1065  -1388.36     0.03   -1091.79    -0.07
  5   0.1723  -3040.83    -0.12   -1389.47    -0.14
  6   0.1723  -3041.00    -0.18   -1389.52    -0.19
  7   0.1723  -3041.05    -0.02   -1389.19     0.15
  8   0.1778  -3192.59    -0.02   -1396.67     0.10
  9   0.1778  -3192.56     0.11   -1396.57     0.20
 10   1.3708  -2101.20     0.04    1785.69    -0.01
 11   1.3708  -2101.03     0.25    1785.74    -0.02
 12   1.3708  -2101.62    -0.30    1785.83     0.01

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.

14QG442    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        52.685    55.337    50.659
ecceobj         0.334     0.388     0.282
incobj         30.445    30.447    30.443
qmin           34.249    32.797    35.687
qmax           70.808    77.661    65.195
amean          52.145    54.727    50.139
amin           51.631    54.014    49.687
amax           52.808    55.667    50.698
emean           0.322     0.378     0.268
emin            0.300     0.354     0.248
emax            0.342     0.400     0.287
imean          29.039    28.971    29.072
imin           28.526    28.286    28.651
imax           29.829    30.005    29.656
excite_mean     0.582     0.615     0.555
fracstop        1.000     1.000     1.000
cjmean          2.756     2.734     2.774

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       179.3     184.1     177.0
kozaiamp        180.0     180.0     179.9