Orbit Fit and Astrometric record for 14UW276

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: 14UW276   
# Created Sat Dec  4 02:12:55 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     17 observations of     17
# Arc:   5.09y
# First observation: 2013/10/03
#  Last observation: 2018/11/07
# Chi-squared of fit:    14.19 DOF:     28 RMS:  0.16
# Min/Max residuals:    -0.51    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.961858E-05  4.346752E-02 -2.568789E-09 -2.607827E-03  3.453327E-02  7.622012E-03
# Covariance matrix:
  1.0317E-12 -6.7074E-13 -3.3055E-14  3.2892E-14  1.9448E-14 -2.5100E-12
 -6.7074E-13  6.1689E-13  3.6063E-14 -3.6176E-14  3.3523E-14  2.7517E-12
 -3.3055E-14  3.6063E-14  5.6957E-13 -1.6375E-13 -3.9787E-15  1.7866E-13
  3.2892E-14 -3.6176E-14 -1.6375E-13  5.6841E-14 -1.5020E-16 -1.7773E-13
  1.9448E-14  3.3523E-14 -3.9787E-15 -1.5020E-16  7.7462E-13 -1.1528E-13
 -2.5100E-12  2.7517E-12  1.7866E-13 -1.7773E-13 -1.1528E-13  1.3564E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -13.303497   22.725062    0.221906   -0.224408   -0.949554  2456568.800478
# Heliocentric elements and errors
Epoch:              2456568.5000  =  2013/10/03
Mean Anomaly:           24.13803 +/-     0.009
Argument of Peri:      210.81980 +/-     0.013
Long of Asc Node:      128.14541 +/-     0.001
Inclination:            13.36373 +/-     0.000
Eccentricity:         0.28886847 +/-    0.0001
Semi-Major Axis:     39.44296231 +/-    0.0071
Time of Perihelion: 2450501.8063 +/-       2.7
Perihelion:          28.04913399 +/-    0.0072
Aphelion:            50.83679062 +/-    0.0105
Period (y)              247.7208 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.97786022 +/-    0.0007
Ecliptic Y           11.06160833 +/-    0.0003
Ecliptic Z           -6.66343899 +/-    0.0002
Ecliptic XDOT        -0.00083892 +/-    0.0000
Ecliptic YDOT         0.00338608 +/-    0.0000
Ecliptic ZDOT        -0.00034012 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.90919340 +/-    0.0006
Geocenter to KBO     28.95751380 +/-    0.0007
# Hcoef:  8.83

The following table shows the complete astrometric record for 14UW276. 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 (14UW276) followed by the observatory code and reference code for the source of the astrometry.

2013 10  03.29970  01 43 43.355  -03 31 49.73  23.5g 14UW276   W84  C~52UR      
2014 10  29.26979  01 50 35.057  -03 01 12.50  23.4i 14UW276   W84  C~52UR      
2014 10  31.24447  01 50 23.131  -03 02 11.12  23.9r 14UW276   W84  C~52UR      
2016 09  10.40183  02 13 13.811  -00 59 02.73  23.3i 14UW276   W84  C~52UR      
2016 09  25.26803  02 12 10.379  -01 09 09.83  23.8g 14UW276   W84  C~52UR      
2016 09  27.48621  02 11 59.37   -01 10 40.4   24.2g 14UW276   568  C~2eAI      
2016 09  27.60677  02 11 58.75   -01 10 45.3   24.2g 14UW276   568  C~2eAI      
2016 09  28.54358  02 11 54.01   -01 11 23.5   24.6g 14UW276   568  C~2eAI      
2016 09  28.62851  02 11 53.57   -01 11 27.0   24.4g 14UW276   568  C~2eAI      
2016 09  29.50747  02 11 49.07   -01 12 02.8   24.4g 14UW276   568  C~2eAI      
2016 09  29.55477  02 11 48.82   -01 12 04.7   24.3g 14UW276   568  C~2eAI      
2016 11  07.16172  02 08 03.142  -01 34 23.13  23.3i 14UW276   W84  C~52UR      
2016 11  27.11271  02 06 13.072  -01 40 23.45  23.7r 14UW276   W84  C~52UR      
2017 10  29.26760  02 17 56.771  -00 45 22.12  23.4r 14UW276   W84  C~52UR      
2017 10  29.26898  02 17 56.761  -00 45 21.97  23.7i 14UW276   W84  C~52UR      
2018 11  07.22958  02 25 53.865  -00 05 23.54  23.1i 14UW276   W84  C~52UR      
2018 11  07.23231  02 25 53.836  -00 05 24.19  23.6g 14UW276   W84  C~52UR      

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    -0.21
     2   1.0704      0.00    -0.03       0.00    -0.10
     3   1.0758      0.00    -0.07       0.00    -0.01
     4   2.9380      0.00     0.00       0.00     0.00
     5   2.9787      0.00     0.33       0.00    -0.37
     6   2.9848      0.00    -0.11       0.00     0.14
     7   2.9851      0.00    -0.11       0.00     0.16
     8   2.9877      0.00    -0.09       0.00     0.20
     9   2.9879      0.00    -0.06       0.00     0.16
    10   2.9903      0.00    -0.05       0.00     0.15
    11   2.9904      0.00    -0.06       0.00     0.17
    12   3.0961      0.00    -0.05       0.00     0.06
    13   3.1508      0.00     0.12       0.00     0.08
    14   4.0711      0.00     0.02       0.00    -0.07
    15   4.0711      0.00     0.00       0.00     0.12
    16   5.0949      0.00     0.16       0.00     0.07
    17   5.0950      0.00    -0.03       0.00    -0.51

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.

14UW276    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.704    39.704    39.704
ecceobj         0.294     0.294     0.294
incobj         13.356    13.356    13.356
qmin           27.340    27.340    27.340
qmax           52.207    52.230    52.213
amean          39.455    39.455    39.455
amin           38.941    38.941    38.941
amax           40.063    40.077    40.079
emean           0.290     0.290     0.290
emin            0.271     0.271     0.271
emax            0.306     0.306     0.306
imean          11.772    11.769    11.772
imin           11.055    11.055    11.056
imax           12.406    12.406    12.406
excite_mean     0.354     0.354     0.354
fracstop        1.000     1.000     1.000
cjmean          2.909     2.909     2.909

libcent 0       179.8     179.8     179.6
libamp  0       105.0     105.0     105.2
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       193.4     193.9     193.4
kozaiamp        180.0     180.0     180.0