Orbit Fit and Astrometric record for 19AO142

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: 19AO142   
# Created Wed Dec 25 02:10:59 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     27 observations of     27
# Arc:   6.13y
# First observation: 2013/02/15
#  Last observation: 2019/04/05
# Chi-squared of fit:    13.68 DOF:     48 RMS:  0.13
# Min/Max residuals:    -0.27    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.700972E-05  2.404058E-02  6.602371E-06  9.970482E-03  2.270546E-02  9.018626E-03
# Covariance matrix:
  3.6331E-13 -2.8001E-13  7.8720E-14 -1.0401E-13 -1.4789E-13 -1.6196E-12
 -2.8001E-13  5.2029E-13 -1.6754E-13  2.2024E-13  5.2180E-13  3.4416E-12
  7.8720E-14 -1.6754E-13  2.7200E-13 -1.1204E-13 -1.7177E-13 -1.1299E-12
 -1.0401E-13  2.2024E-13 -1.1204E-13  1.0499E-13  2.2423E-13  1.4852E-12
 -1.4789E-13  5.2180E-13 -1.7177E-13  2.2423E-13  8.2144E-13  3.5210E-12
 -1.6196E-12  3.4416E-12 -1.1299E-12  1.4852E-12  3.5210E-12  2.3209E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -11.297457  155.946024    0.159303   -0.190791   -0.955499  2456338.720863
# Heliocentric elements and errors
Epoch:              2456338.5000  =  2013/02/15
Mean Anomaly:            5.64122 +/-     0.005
Argument of Peri:      286.81060 +/-     0.017
Long of Asc Node:      180.69493 +/-     0.000
Inclination:            24.84337 +/-     0.000
Eccentricity:         0.72231220 +/-    0.0002
Semi-Major Axis:    141.26458100 +/-    0.0747
Time of Perihelion: 2446728.6079 +/-      10.9
Perihelion:          39.22745105 +/-    0.0318
Aphelion:           243.30171095 +/-    0.1309
Period (y)             1679.0287 +/-      1.33
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -40.26260411 +/-    0.0016
Ecliptic Y           18.14812013 +/-    0.0007
Ecliptic Z           -8.62775294 +/-    0.0003
Ecliptic XDOT        -0.00237665 +/-    0.0000
Ecliptic YDOT        -0.00211556 +/-    0.0000
Ecliptic ZDOT         0.00096605 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.99827600 +/-    0.0014
Geocenter to KBO     44.04202399 +/-    0.0018
# Hcoef:  8.03

The following table shows the complete astrometric record for 19AO142. 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 (19AO142) followed by the observatory code and reference code for the source of the astrometry.

2013 02  15.220085 10 14 22.419  -01 11 19.46  24.6r 19AO142   W84  C~870S      
2013 02  15.238084 10 14 22.348  -01 11 19.15  24.3r 19AO142   W84  C~870S      
2014 03  08.054895 10 18 54.843  -00 59 19.45  24.0r 19AO142   W84  C~870S      
2014 03  09.20504  10 18 50.37   -00 58 42.9         19AO142   W84  C~870S      
2014 03  09.26605  10 18 50.13   -00 58 41.0   24.2r 19AO142   W84  C~870S      
2014 03  10.04142  10 18 47.15   -00 58 16.4         19AO142   W84  C~8Sg3      
2014 03  10.158990 10 18 46.696  -00 58 12.67  23.8r 19AO142   W84  C~870S      
2014 03  10.238012 10 18 46.376  -00 58 10.23  24.3r 19AO142   W84  C~870S      
2014 03  25.037306 10 17 53.097  -00 50 11.04  24.5R 19AO142   W84  C~870S      
2017 04  02.24212  10 34 34.68   -00 40 49.5   25.6r 19AO142   T09  C~870S      
2017 04  02.29067  10 34 34.52   -00 40 48.1   25.7r 19AO142   T09  C~870S      
2017 04  02.36695  10 34 34.29   -00 40 46.0   25.2r 19AO142   T09  C~870S      
2019 01  11.52118  10 50 05.45   -01 10 50.5   24.3z 19AO142   T09  C~870S      
2019 01  11.57085  10 50 05.33   -01 10 49.8   24.7z 19AO142   T09  C~870S      
2019 01  11.61159  10 50 05.26   -01 10 49.3   24.5z 19AO142   T09  C~870S      
2019 01  11.65207  10 50 05.17   -01 10 49.1   23.8z 19AO142   T09  C~870S      
2019 01  11.65474  10 50 05.16   -01 10 48.8   24.9z 19AO142   T09  C~870S      
2019 03  15.32587  10 46 31.84   -00 47 02.4   24.1y 19AO142   T09  C~870S      
2019 03  15.41677  10 46 31.52   -00 47 00.1   24.4y 19AO142   T09  C~870S      
2019 03  15.41944  10 46 31.48   -00 46 59.8   24.8y 19AO142   T09  C~870S      
2019 03  15.45994  10 46 31.33   -00 46 58.6   24.4y 19AO142   T09  C~870S      
2019 03  15.51085  10 46 31.15   -00 46 57.1   24.4y 19AO142   T09  C~870S      
2019 04  05.38120  10 45 20.10   -00 36 16.5   25.1r 19AO142   T09  C~870S      
2019 04  05.38680  10 45 20.06   -00 36 16.5   24.8r 19AO142   T09  C~870S      
2019 04  05.41988  10 45 19.96   -00 36 15.3   24.8r 19AO142   T09  C~870S      
2019 04  05.48859  10 45 19.75   -00 36 13.3   24.6r 19AO142   T09  C~870S      
2019 04  05.49907  10 45 19.72   -00 36 13.3   24.8r 19AO142   T09  C~870S      

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    -0.03       0.00     0.09
     2   0.0000      0.00     0.03       0.00    -0.09
     3   1.0564      0.00    -0.06       0.00    -0.04
     4   1.0595      0.00     0.01       0.00     0.09
     5   1.0597      0.00     0.01       0.00     0.05
     6   1.0618      0.00    -0.03       0.00    -0.01
     7   1.0621      0.00     0.06       0.00    -0.03
     8   1.0623      0.00    -0.10       0.00    -0.11
     9   1.1029      0.00     0.07       0.00     0.03
    10   4.1260      0.00     0.06       0.00     0.19
    11   4.1261      0.00    -0.08       0.00     0.09
    12   4.1263      0.00     0.02       0.00    -0.16
    13   5.9036      0.00    -0.07       0.00    -0.27
    14   5.9038      0.00    -0.21       0.00    -0.06
    15   5.9039      0.00     0.11       0.00     0.04
    16   5.9040      0.00     0.11       0.00    -0.16
    17   5.9040      0.00     0.05       0.00     0.11
    18   6.0756      0.00    -0.15       0.00     0.34
    19   6.0758      0.00     0.22       0.00    -0.15
    20   6.0758      0.00    -0.23       0.00     0.07
    21   6.0759      0.00    -0.17       0.00     0.02
    22   6.0761      0.00     0.02       0.00    -0.04
    23   6.1332      0.00     0.32       0.00     0.10
    24   6.1332      0.00    -0.02       0.00    -0.07
    25   6.1333      0.00     0.00       0.00     0.14
    26   6.1335      0.00    -0.01       0.00     0.08
    27   6.1335      0.00     0.02       0.00    -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.

19AO142    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       140.060   140.062   140.059
ecceobj         0.720     0.720     0.720
incobj         24.870    24.870    24.870
qmin           37.934    37.934    37.934
qmax          248.173   248.468   248.954
amean         138.763   138.432   138.829
amin          135.585   135.236   135.884
amax          143.934   143.971   144.231
emean           0.712     0.712     0.712
emin            0.699     0.699     0.700
emax            0.726     0.727     0.726
imean          25.256    25.188    25.259
imin           24.240    24.240    24.240
imax           26.268    26.108    26.256
excite_mean     0.830     0.829     0.830
fracstop        1.000     1.000     1.000
cjmean          2.943     2.943     2.943

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       303.4     317.1     302.0
kozaiamp        180.0     180.0     180.0