Orbit Fit and Astrometric record for 14QW495

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: 14QW495   
# Created Sat Nov 27 02:12:40 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     30 observations of     30
# Arc:   5.12y
# First observation: 2013/09/23
#  Last observation: 2018/11/08
# Chi-squared of fit:    15.21 DOF:     54 RMS:  0.13
# Min/Max residuals:    -0.23    0.32
# Exact a, adot, b, bdot, g, gdot:
  2.055236E-05  3.843185E-02 -7.082077E-06 -1.403667E-02  2.926822E-02  5.262510E-03
# Covariance matrix:
  5.2615E-13 -4.7972E-13 -1.2060E-13  1.4725E-13  5.5241E-14 -2.1118E-12
 -4.7972E-13  5.4965E-13  1.2670E-13 -1.7262E-13 -2.8440E-13  2.6163E-12
 -1.2060E-13  1.2670E-13  1.9755E-13 -9.4012E-14  8.4802E-14  6.0145E-13
  1.4725E-13 -1.7262E-13 -9.4012E-14  8.0160E-14  3.9641E-14 -8.4650E-13
  5.5241E-14 -2.8440E-13  8.4802E-14  3.9641E-14  1.7687E-12 -1.6916E-12
 -2.1118E-12  2.6163E-12  6.0145E-13 -8.4650E-13 -1.6916E-12  1.3020E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -21.413458  -60.303236   -0.878340   -0.177142   -0.451935  2456559.490368
# Heliocentric elements and errors
Epoch:              2456558.5000  =  2013/09/23
Mean Anomaly:            2.00600 +/-     0.003
Argument of Peri:      208.81833 +/-     0.009
Long of Asc Node:       75.99671 +/-     0.000
Inclination:            28.53066 +/-     0.000
Eccentricity:         0.74431945 +/-    0.0003
Semi-Major Axis:    131.90176883 +/-    0.1487
Time of Perihelion: 2453475.2903 +/-       7.5
Perihelion:          33.72471704 +/-    0.0531
Aphelion:           230.07882063 +/-    0.2620
Period (y)             1514.9006 +/-      2.56
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           16.76174534 +/-    0.0007
Ecliptic Y          -27.61415925 +/-    0.0013
Ecliptic Z          -12.47435913 +/-    0.0006
Ecliptic XDOT         0.00310625 +/-    0.0000
Ecliptic YDOT         0.00179807 +/-    0.0000
Ecliptic ZDOT        -0.00140199 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.62801914 +/-    0.0011
Geocenter to KBO     34.16670987 +/-    0.0016
# Hcoef:  7.68

The following table shows the complete astrometric record for 14QW495. 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 (14QW495) followed by the observatory code and reference code for the source of the astrometry.

2013 09  23.98959  20 30 48.006  -41 02 41.39  23.1i 14QW495   W84  C~4yTz      
2014 08  29.052234 20 45 08.96   -41 15 01.0   22.8i 14QW495   W84  C~35bt      
2014 08  29.05277  20 45 08.969  -41 15 01.13  22.9i 14QW495   W84  C~4yTz      
2014 09  12.070081 20 43 55.58   -41 14 42.2   22.8i 14QW495   W84  C~35bt      
2014 09  12.07061  20 43 55.572  -41 14 42.16  22.7i 14QW495   W84  C~4yTz      
2014 09  20.004097 20 43 22.47   -41 13 21.1   22.9i 14QW495   W84  C~35bt      
2014 09  20.00462  20 43 22.475  -41 13 21.32  23.2i 14QW495   W84  C~4yTz      
2014 09  20.005498 20 43 22.46   -41 13 21.1   23.2r 14QW495   W84  C~35bt      
2014 09  20.00602  20 43 22.454  -41 13 21.36  23.3r 14QW495   W84  C~4yTz      
2014 09  24.05025  20 43 08.335  -41 12 21.20  23.3i 14QW495   W84  C~4yTz      
2014 09  25.026308 20 43 05.22   -41 12 04.8   23.0r 14QW495   W84  C~35bt      
2014 09  25.02684  20 43 05.224  -41 12 04.75  23.5r 14QW495   W84  C~4yTz      
2014 09  27.004560 20 42 59.29   -41 11 29.5   23.0r 14QW495   W84  C~35bt      
2014 09  27.00509  20 42 59.288  -41 11 29.52  23.0r 14QW495   W84  C~4yTz      
2015 09  13.073912 20 56 08.88   -41 18 56.5   23.0r 14QW495   W84  C~35bt      
2015 09  13.07444  20 56 08.883  -41 18 56.52  23.1r 14QW495   W84  C~4yTz      
2015 09  13.075289 20 56 08.89   -41 18 56.5   22.7i 14QW495   W84  C~35bt      
2015 09  13.07582  20 56 08.887  -41 18 56.51  22.8i 14QW495   W84  C~4yTz      
2015 09  13.076667 20 56 08.88   -41 18 56.4   24.3g 14QW495   W84  C~35bt      
2015 09  13.07719  20 56 08.878  -41 18 56.41  24.1g 14QW495   W84  C~4yTz      
2016 08  23.256516 21 10 11.66   -41 16 44.7   22.8z 14QW495   W84  C~35bt      
2016 08  23.25704  21 10 11.673  -41 16 44.85  22.9z 14QW495   W84  C~4yTz      
2016 09  07.16952  21 08 43.408  -41 18 31.89  24.3g 14QW495   W84  C~4yTz      
2017 09  12.08775  21 20 15.086  -41 13 11.09  23.7r 14QW495   W84  C~4yTz      
2017 10  20.005961 21 18 11.08   -41 02 05.4   21.5r 14QW495   W84  C~35bt      
2017 10  22.00581  21 18 09.499  -41 00 59.57  22.8z 14QW495   W84  C~4yTz      
2018 09  15.21269  21 31 42.399  -41 03 30.44  23.1i 14QW495   W84  C~4yTz      
2018 10  22.06031  21 29 40.572  -40 52 30.67  22.9z 14QW495   W84  C~4yTz      
2018 11  08.07158  21 29 42.198  -40 41 41.47  23.3r 14QW495   W84  C~4yTz      
2018 11  08.10806  21 29 42.237  -40 41 39.91  23.9g 14QW495   W84  C~4yTz      

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     0.09       0.00    -0.09
     2   0.9283      0.00    -0.15       0.00     0.14
     3   0.9283      0.00     0.03       0.00     0.01
     4   0.9667      0.00    -0.07       0.00     0.17
     5   0.9667      0.00    -0.16       0.00     0.21
     6   0.9884      0.00    -0.02       0.00     0.24
     7   0.9884      0.00     0.09       0.00     0.02
     8   0.9884      0.00    -0.09       0.00     0.22
     9   0.9884      0.00    -0.15       0.00    -0.04
    10   0.9995      0.00     0.10       0.00    -0.09
    11   1.0022      0.00     0.02       0.00    -0.09
    12   1.0022      0.00     0.10       0.00    -0.04
    13   1.0076      0.00     0.15       0.00    -0.18
    14   1.0076      0.00     0.14       0.00    -0.21
    15   1.9687      0.00    -0.18       0.00    -0.09
    16   1.9687      0.00    -0.10       0.00    -0.11
    17   1.9687      0.00     0.07       0.00    -0.09
    18   1.9688      0.00     0.06       0.00    -0.11
    19   1.9688      0.00     0.02       0.00    -0.00
    20   1.9688      0.00     0.03       0.00    -0.02
    21   2.9138      0.00    -0.11       0.00     0.26
    22   2.9138      0.00     0.13       0.00     0.11
    23   2.9546      0.00     0.32       0.00    -0.12
    24   3.9674      0.00    -0.03       0.00    -0.12
    25   4.0712      0.00    -0.05       0.00     0.04
    26   4.0767      0.00    -0.01       0.00    -0.15
    27   4.9753      0.00     0.17       0.00     0.14
    28   5.0762      0.00    -0.23       0.00    -0.01
    29   5.1227      0.00     0.04       0.00     0.01
    30   5.1228      0.00    -0.04       0.00    -0.03

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.

14QW495    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       132.751   132.750   132.752
ecceobj         0.746     0.746     0.746
incobj         28.551    28.551    28.551
qmin           31.822    32.154    31.711
qmax          242.963   245.300   247.505
amean         132.501   133.429   132.789
amin          128.514   129.899   128.759
amax          138.296   139.404   140.399
emean           0.748     0.748     0.749
emin            0.737     0.738     0.738
emax            0.761     0.760     0.763
imean          26.626    27.002    26.492
imin           25.863    26.359    25.674
imax           27.696    27.678    27.697
excite_mean     0.872     0.875     0.872
fracstop        1.000     1.000     1.000
cjmean          2.716     2.716     2.716

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       248.9     243.6     250.3
kozaiamp         46.0      42.0      46.4