Orbit Fit and Astrometric record for 516977

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: 516977    
# Created Fri Dec  3 02:07:40 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     47 observations of     47
# Arc:   5.18y
# First observation: 2012/04/17
#  Last observation: 2017/06/23
# Chi-squared of fit:    42.52 DOF:     88 RMS:  0.17
# Min/Max residuals:    -1.10    0.37
# Exact a, adot, b, bdot, g, gdot:
  1.553425E-05  2.486698E-02  1.108383E-06  2.194822E-03  2.449059E-02 -3.541168E-03
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.928852  -81.047379    0.954546    0.010824   -0.321325  2456034.840996
# Heliocentric elements and errors
Epoch:              2456034.5000  =  2012/04/17
Mean Anomaly:          311.35269 +/-     0.000
Argument of Peri:       88.56419 +/-     0.000
Long of Asc Node:      257.17999 +/-     0.000
Inclination:             5.46234 +/-     0.000
Eccentricity:         0.19338772 +/-    0.0000
Semi-Major Axis:     45.85604058 +/-    0.0000
Time of Perihelion: 2471361.2332 +/-       0.0
Perihelion:          36.98804551 +/-    0.0000
Aphelion:            54.72403564 +/-    0.0000
Period (y)              310.5296 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            5.46106515 +/-    0.0000
Ecliptic Y          -40.77596559 +/-    0.0000
Ecliptic Z            1.37439577 +/-    0.0000
Ecliptic XDOT         0.00267825 +/-    0.0000
Ecliptic YDOT         0.00083527 +/-    0.0000
Ecliptic ZDOT         0.00023200 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.16309697 +/-    0.0000
Geocenter to KBO     40.83212700 +/-    0.0000
# Hcoef:  8.77

The following table shows the complete astrometric record for 516977. 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 (516977) followed by the observatory code and reference code for the source of the astrometry.

2012 04  17.34023  18 38 24.90   -21 12 44.9         516977    268  C~11qh      
2012 04  17.34199  18 38 24.89   -21 12 45.0         516977    268  C~11qh      
2012 04  17.38720  18 38 24.85   -21 12 44.8         516977    268  C~11qh      
2012 04  17.41592  18 38 24.81   -21 12 44.7         516977    268  C~11qh      
2012 04  18.26755  18 38 24.04   -21 12 42.0         516977    268  C~11qh      
2012 04  18.31485  18 38 23.97   -21 12 41.9         516977    268  C~11qh      
2012 04  18.36265  18 38 23.93   -21 12 41.7         516977    268  C~11qh      
2012 04  18.40528  18 38 23.88   -21 12 41.7         516977    268  C~11qh      
2012 04  19.30535  18 38 22.94   -21 12 38.8         516977    268  C~11qh      
2012 04  19.30696  18 38 22.95   -21 12 39.0         516977    268  C~11qh      
2012 04  19.31725  18 38 22.93   -21 12 39.0         516977    268  C~11qh      
2012 04  19.35214  18 38 22.90   -21 12 38.8         516977    268  C~11qh      
2012 04  19.36183  18 38 22.89   -21 12 38.8         516977    268  C~11qh      
2012 04  19.36529  18 38 22.87   -21 12 38.9         516977    268  C~11qh      
2012 04  19.39518  18 38 22.85   -21 12 38.7         516977    268  C~11qh      
2012 04  19.39905  18 38 22.84   -21 12 38.5   26.0R 516977    268  C~11qh      
2012 04  19.40424  18 38 22.83   -21 12 38.6         516977    268  C~11qh      
2012 04  19.41581  18 38 22.82   -21 12 38.5         516977    268  C~11qh      
2013 06  11.21626  18 41 39.73   -20 58 52.3         516977    268  C~11qh      
2013 06  11.27933  18 41 39.43   -20 58 52.4         516977    268  C~11qh      
2013 06  11.34902  18 41 39.10   -20 58 52.5         516977    268  C~11qh      
2013 06  13.21699  18 41 29.98   -20 58 57.4         516977    268  C~11qh      
2013 06  13.27759  18 41 29.68   -20 58 57.5         516977    268  C~11qh      
2013 06  13.35667  18 41 29.28   -20 58 57.9         516977    268  C~11qh      
2013 06  13.37736  18 41 29.19   -20 58 57.7         516977    268  C~11qh      
2013 07  05.44641  18 39 36.03   -21 00 13.1         516977    266  C~11qh      
2013 07  05.52857  18 39 35.59   -21 00 13.1         516977    266  C~11qh      
2013 07  06.35581  18 39 31.32   -21 00 16.8         516977    266  C~11qh      
2013 07  06.44409  18 39 30.86   -21 00 16.9         516977    266  C~11qh      
2013 07  06.52777  18 39 30.42   -21 00 17.3         516977    266  C~11qh      
2013 08  28.07314  18 35 53.91   -21 03 52.6         516977    268  C~11qh      
2013 08  30.06766  18 35 49.40   -21 03 59.7         516977    268  C~11qh      
2013 09  01.05404  18 35 45.26   -21 04 06.2         516977    268  C~11qh      
2013 09  03.04605  18 35 41.48   -21 04 12.6         516977    268  C~11qh      
2013 09  04.04974  18 35 39.72   -21 04 15.8         516977    268  C~11qh      
2014 06  25.39062  18 46 41.456  -20 45 16.41        516977    266  C~2Gt8      
2014 06  25.42914  18 46 41.255  -20 45 16.58        516977    266  C~2Gt8      
2014 06  25.44525  18 46 41.168  -20 45 16.67        516977    266  C~2Gt8      
2014 06  25.53018  18 46 40.726  -20 45 16.96        516977    266  C~2Gt8      
2014 06  25.54954  18 46 40.616  -20 45 17.01        516977    266  C~2Gt8      
2014 06  27.35925  18 46 31.267  -20 45 24.74        516977    266  C~2Gt8      
2014 06  27.37093  18 46 31.205  -20 45 24.76        516977    266  C~2Gt8      
2017 05  20.47377  19 08 03.408  -19 54 20.28        516977    568  C~2ccW      
2017 05  20.53047  19 08 03.229  -19 54 20.36  24.9r 516977    568  C~2ccW      
2017 06  22.44393  19 05 42.842  -19 56 19.89  24.9r 516977    568  C~2ccW      
2017 06  23.44025  19 05 37.823  -19 56 25.47  24.8r 516977    568  C~2ccW      
2017 06  23.49734  19 05 37.442  -19 56 26.05  23.0r 516977    568  C~2ccW      

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     0.11       0.00     0.07
     2   0.0000      0.00    -0.01       0.00    -0.03
     3   0.0001      0.00     0.05       0.00     0.03
     4   0.0002      0.00    -0.13       0.00     0.03
     5   0.0025      0.00     0.19       0.00     0.04
     6   0.0027      0.00    -0.11       0.00     0.00
     7   0.0028      0.00     0.06       0.00     0.06
     8   0.0029      0.00     0.00       0.00    -0.07
     9   0.0054      0.00    -0.11       0.00     0.09
    10   0.0054      0.00     0.07       0.00    -0.11
    11   0.0054      0.00    -0.05       0.00    -0.14
    12   0.0055      0.00     0.11       0.00    -0.04
    13   0.0055      0.00     0.13       0.00    -0.06
    14   0.0055      0.00    -0.11       0.00    -0.17
    15   0.0056      0.00     0.12       0.00    -0.06
    16   0.0056      0.00     0.04       0.00     0.13
    17   0.0057      0.00    -0.02       0.00     0.01
    18   0.0057      0.00     0.04       0.00     0.08
    19   1.1496      0.00    -0.34       0.00    -0.12
    20   1.1497      0.00    -0.17       0.00    -0.06
    21   1.1499      0.00     0.03       0.00     0.01
    22   1.1550      0.00    -0.15       0.00     0.01
    23   1.1552      0.00    -0.11       0.00     0.07
    24   1.1554      0.00    -0.18       0.00    -0.13
    25   1.1555      0.00     0.01       0.00     0.12
    26   1.2159      0.00    -0.03       0.00    -0.25
    27   1.2161      0.00    -0.12       0.00     0.06
    28   1.2184      0.00    -0.01       0.00    -0.35
    29   1.2186      0.00     0.08       0.00    -0.09
    30   1.2189      0.00     0.09       0.00    -0.17
    31   1.3627      0.00     0.04       0.00     0.24
    32   1.3682      0.00     0.13       0.00    -0.02
    33   1.3736      0.00     0.07       0.00     0.08
    34   1.3791      0.00     0.04       0.00     0.08
    35   1.3818      0.00     0.07       0.00     0.01
    36   2.1877      0.00     0.07       0.00     0.14
    37   2.1878      0.00     0.09       0.00     0.14
    38   2.1878      0.00     0.06       0.00     0.11
    39   2.1881      0.00     0.13       0.00     0.17
    40   2.1881      0.00    -0.00       0.00     0.19
    41   2.1931      0.00     0.07       0.00     0.06
    42   2.1931      0.00     0.06       0.00     0.09
    43   5.0900      0.00     0.24       0.00    -0.10
    44   5.0902      0.00     0.37       0.00    -0.10
    45   5.1803      0.00     0.24       0.00    -0.07
    46   5.1830      0.00     0.21       0.00     0.12
    47   5.1832      0.00    -1.10       0.00    -0.13

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.

516977    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        45.793    45.793    45.794
ecceobj         0.194     0.194     0.194
incobj          5.466     5.466     5.466
qmin           36.007    35.790    36.134
qmax           56.477    56.686    56.276
amean          46.041    46.014    45.977
amin           45.569    45.574    45.539
amax           46.543    46.531    46.502
emean           0.197     0.197     0.194
emin            0.180     0.180     0.178
emax            0.215     0.220     0.213
imean           7.531     7.561     7.563
imin            6.713     6.754     6.754
imax            8.451     8.391     8.517
excite_mean     0.236     0.237     0.235
fracstop        1.000     1.000     1.000
cjmean          3.057     3.057     3.058

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       179.2     179.1     178.9
kozaiamp        180.0     180.0     179.9