Orbit Fit and Astrometric record for 14QA442

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: 14QA442   
# Created Mon Dec 11 02:38:08 2017
# Orbit generated from Bernstein formalism
# Fitting   22 observations of   23
# Arc:   4.81y
# First observation: 2010/10/06
#  Last observation: 2015/07/30
Preliminary a, adot, b, bdot, g, gdot:
   0.000033   0.031067   0.000005  -0.006793   0.029843   0.000000
# Chi-squared of fit:    12.11 DOF:   38 RMS:  0.13
# Min/Max residuals:    -0.33    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.807268E-05  3.078988E-02 -3.351234E-06 -6.653456E-03  2.819395E-02 -3.174866E-03
# Covariance matrix:
  2.0937E-13 -8.4004E-14 -4.4545E-16  7.2999E-15 -2.8619E-14 -2.5399E-13
 -8.4004E-14  4.6955E-13  6.1431E-15 -9.8383E-14  4.3434E-13  3.3798E-12
 -4.4545E-16  6.1431E-15  2.0676E-13 -5.0977E-14  7.2458E-15  4.6918E-14
  7.2999E-15 -9.8383E-14 -5.0977E-14  3.9296E-14 -1.0600E-13 -7.4394E-13
 -2.8619E-14  4.3434E-13  7.2458E-15 -1.0600E-13  6.8646E-13  3.4468E-12
 -2.5399E-13  3.3798E-12  4.6918E-14 -7.4394E-13  3.4468E-12  2.5412E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -25.530499   -7.721374   -0.362045   -0.399828   -0.837105  2455476.498906
# Heliocentric elements and errors
Epoch:              2455470.5000  =  2010/10/01
Mean Anomaly:          336.14126 +/-     0.027
Argument of Peri:      281.01898 +/-     0.042
Long of Asc Node:      109.37030 +/-     0.001
Inclination:            27.40236 +/-     0.000
Eccentricity:         0.18846489 +/-    0.0001
Semi-Major Axis:     43.47353462 +/-    0.0061
Time of Perihelion: 2462409.2438 +/-       7.8
Perihelion:          35.28029960 +/-    0.0081
Aphelion:            51.66676963 +/-    0.0097
Period (y)              286.6458 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.68728284 +/-    0.0009
Ecliptic Y           -4.06658790 +/-    0.0001
Ecliptic Z          -15.28678840 +/-    0.0004
Ecliptic XDOT        -0.00014974 +/-    0.0000
Ecliptic YDOT         0.00304398 +/-    0.0000
Ecliptic ZDOT        -0.00045015 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.31365440 +/-    0.0009
Geocenter to KBO     35.46860630 +/-    0.0010
# Hcoef:  5.68

The following table shows the complete astrometric record for 14QA442. 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 (14QA442) followed by the observatory code and reference code for the source of the astrometry.

2010 10  06.99814  00 15 24.477  -26 20 13.70  20.8R 14QA442   809  C~0Np8      
2010 10  07.08240  00 15 24.031  -26 20 15.21  21.0R 14QA442   809  C~0Np8      
2010 10  07.16569  00 15 23.579  -26 20 17.23  20.8R 14QA442   809  C~0Np8      
2010 10  07.99694  00 15 19.066  -26 20 35.05        14QA442   809  C~0Np8      
2010 10  07.99950  00 15 19.032  -26 20 35.05        14QA442   809  C~0Np8      
2010 10  08.08096  00 15 18.605  -26 20 36.81        14QA442   809  C~0Np8      
2010 10  08.08352  00 15 18.574  -26 20 36.81        14QA442   809  C~0Np8      
2010 10  08.16764  00 15 18.057  -26 20 37.96  21.1R 14QA442   809  C~0Np8      
2014 08  16.55733  00 50 37.325  -23 45 06.57  20.7i 14QA442   F51  C~1vXi      
2014 08  16.56786  00 50 37.300  -23 45 06.96  20.7i 14QA442   F51  C~1vXi      
2014 08  16.57837  00 50 37.262  -23 45 07.56  20.5i 14QA442   F51  C~1vXi      
2014 08  16.58889  00 50 37.214  -23 45 08.30  20.8i 14QA442   F51  C~1vXi      
2014 09  04.53371  00 49 24.577  -24 01 27.18  20.8w 14QA442   F51  C~1vXi      
2014 09  04.54450  00 49 24.525  -24 01 27.76  20.9w 14QA442   F51  C~1vXi      
2014 09  04.55529  00 49 24.476  -24 01 28.22  20.9w 14QA442   F51  C~1vXi      
2014 09  04.56607  00 49 24.426  -24 01 28.83  20.8w 14QA442   F51  C~1vXi      
2014 11  27.26046  00 42 40.403  -24 24 36.39  20.8r 14QA442   F51  C~1vXi      
2014 11  27.27069  00 42 40.384  -24 24 36.11  20.7r 14QA442   F51  C~1vXi      
2014 11  27.28056  00 42 40.355  -24 24 35.93  20.8r 14QA442   F51  C~1vXi      
2014 11  27.29042  00 42 40.315  -24 24 35.76  20.9r 14QA442   F51  C~1vXi      
2015 07  30.57872  00 58 50.651  -22 55 56.54  20.5i 14QA442   F51  C~2FaJ      
2015 07  30.58904  00 58 50.629  -22 55 57.19  20.6i 14QA442   F51  C~2FaJ      
2015 07  30.60969  00 58 50.614  -22 55 58.33  20.8i 14QA442   F51  C~2FaJ      

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    -0.17       0.00    -0.08
  2   0.0002     -6.05     0.22       1.28     0.14
  3   0.0005    -12.39     0.24       2.14    -0.09
  4   0.0027    -74.72     0.01      12.81    -0.11
  5   0.0027    -75.13    -0.20      13.01     0.06
  6   0.0030    -81.06     0.03      13.96    -0.08
  7   0.0030    -81.43    -0.15      14.14     0.07
  8   0.0032    -88.18 (  -0.52)     16.16 (   0.94)
  9   3.8592  29927.28    -0.17   -5295.45     0.06
 10   3.8592  29926.78     0.01   -5295.62     0.16
 11   3.8592  29926.01    -0.06   -5295.88     0.16
 12   3.8592  29925.05    -0.33   -5296.20     0.10
 13   3.9111  28547.33     0.21   -5652.47    -0.06
 14   3.9111  28546.40     0.16   -5652.62    -0.09
 15   3.9112  28545.58     0.20   -5652.68    -0.04
 16   3.9112  28544.66     0.16   -5652.87    -0.11
 17   4.1403  22957.69    -0.07   -4130.91     0.11
 18   4.1404  22957.60     0.07   -4130.54     0.07
 19   4.1404  22957.34     0.03   -4130.19     0.02
 20   4.1404  22956.94    -0.14   -4129.77     0.04
 21   4.8120  37484.68     0.06   -6196.71    -0.04
 22   4.8120  37484.07    -0.11   -6197.12    -0.08
 23   4.8121  37483.29    -0.01   -6198.00    -0.23

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.

14QA442    quality flag:2

Type:       SCATEXTD  SCATEXTD  SCATNEAR

axisobj        43.452    43.469    43.436
ecceobj         0.189     0.189     0.188
incobj         27.424    27.424    27.424
qmin           34.651    34.696    34.619
qmax           52.072    52.114    51.910
amean          43.193    43.206    43.119
amin           42.820    42.842    42.708
amax           43.604    43.623    43.586
emean           0.175     0.175     0.169
emin            0.154     0.156     0.146
emax            0.195     0.195     0.194
imean          25.980    25.978    26.059
imin           25.439    25.478    25.408
imax           26.461    26.456    26.564
excite_mean     0.472     0.472     0.471
fracstop        1.000     1.000     1.000
cjmean          2.817     2.817     2.817

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       181.1     184.1     181.3
kozaiamp        180.0     180.0     180.0