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 Thu Oct 18 01:09:38 2018
# Orbit generated from Bernstein formalism
# Fitting   14 observations of   14
# Arc:   3.34y
# First observation: 2014/08/19
#  Last observation: 2017/12/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000212   0.026690  -0.000101   0.008297   0.025564   0.000000
# Chi-squared of fit:    11.54 DOF:   22 RMS:  0.16
# Min/Max residuals:    -0.42    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.852849E-05  2.690791E-02  4.314725E-06  8.365157E-03  2.579303E-02  8.052771E-03
# Covariance matrix:
  5.8057E-13  6.7691E-13  1.7157E-13  1.5605E-13  9.2283E-13  8.3499E-12
  6.7691E-13  2.1200E-12  3.1457E-13  5.6112E-13  2.0217E-12  2.8069E-11
  1.7157E-13  3.1457E-13  2.3219E-13 -2.0470E-15  3.8276E-13  3.5847E-12
  1.5605E-13  5.6112E-13 -2.0470E-15  2.5491E-13  4.9490E-13  8.3947E-12
  9.2283E-13  2.0217E-12  3.8276E-13  4.9490E-13  2.2347E-12  2.5437E-11
  8.3499E-12  2.8069E-11  3.5847E-12  8.3947E-12  2.5437E-11  4.1268E-10
#      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:           27.52931 +/-     0.027
Argument of Peri:      242.03957 +/-     0.072
Long of Asc Node:       95.98411 +/-     0.001
Inclination:            30.43130 +/-     0.000
Eccentricity:         0.36497357 +/-    0.0007
Semi-Major Axis:     53.73099747 +/-    0.0297
Time of Perihelion: 2445879.5884 +/-       5.5
Perihelion:          34.12060370 +/-    0.0420
Aphelion:            73.34139124 +/-    0.0552
Period (y)              393.8633 +/-      0.33
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.94908002 +/-    0.0015
Ecliptic Y           22.42471215 +/-    0.0013
Ecliptic Z          -17.11778035 +/-    0.0010
Ecliptic XDOT        -0.00102244 +/-    0.0000
Ecliptic YDOT         0.00290529 +/-    0.0000
Ecliptic ZDOT         0.00041942 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.01460026 +/-    0.0014
Geocenter to KBO     38.77016188 +/-    0.0022
# Hcoef:  7.25

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      
2017 12  20.28361  03 15 57.539  -07 42 32.69  22.4R 14QG442   G37  C~2Uxc      
2017 12  20.36026  03 15 57.233  -07 42 31.49        14QG442   G37  C~2Uxc      

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    -0.42       0.00     0.17
  2   0.1065  -1387.99     0.27   -1091.59     0.18
  3   0.1065  -1388.19     0.16   -1091.74     0.06
  4   0.1065  -1388.36     0.07   -1091.79     0.03
  5   0.1723  -3040.83    -0.08   -1389.47    -0.26
  6   0.1723  -3041.00    -0.14   -1389.52    -0.31
  7   0.1723  -3041.05     0.02   -1389.19     0.03
  8   0.1778  -3192.59     0.01   -1396.67    -0.03
  9   0.1778  -3192.56     0.14   -1396.57     0.06
 10   1.3708  -2101.20     0.03    1785.69     0.03
 11   1.3708  -2101.03     0.24    1785.74     0.03
 12   1.3708  -2101.62    -0.31    1785.83     0.05
 13   3.3371   9328.66     0.03    4704.20    -0.01
 14   3.3373   9324.69    -0.03    4706.75    -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.

14QG442    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        54.427    54.518    54.338
ecceobj         0.373     0.375     0.371
incobj         30.446    30.445    30.447
qmin           33.177    33.109    33.242
qmax           75.125    75.862    74.973
amean          53.702    53.996    53.641
amin           53.029    53.283    52.969
amax           54.479    54.859    54.382
emean           0.360     0.363     0.358
emin            0.336     0.333     0.334
emax            0.381     0.385     0.379
imean          29.027    29.117    29.040
imin           28.400    28.354    28.370
imax           29.990    30.197    29.961
excite_mean     0.604     0.607     0.603
fracstop        1.000     1.000     1.000
cjmean          2.739     2.738     2.740

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       182.0     175.2     182.2
kozaiamp        179.9     179.9     179.9