Orbit Fit and Astrometric record for 19RO4

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: 19RO4     
# Created Thu Dec  9 02:14:05 2021
# Orbit generated from Bernstein formalism
# Fitting     13 observations of     14
# Arc:   1.85y
# First observation: 2019/09/04
#  Last observation: 2021/07/09
Preliminary a, adot, b, bdot, g, gdot:
  -0.000001   0.022411  -0.000000  -0.008053   0.024489   0.000000
# Chi-squared of fit:     7.97 DOF:     20 RMS:  0.14
# Min/Max residuals:    -0.27    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.276417E-05  2.258927E-02 -5.774169E-06 -8.124877E-03  2.477999E-02  4.112850E-03
# Covariance matrix:
  2.6714E-13 -2.5040E-14  4.2375E-15 -8.4819E-14  5.2341E-13  5.9254E-12
 -2.5040E-14  2.5335E-12  5.1040E-14 -8.0199E-13  2.0288E-12  5.6065E-11
  4.2375E-15  5.1040E-14  1.8760E-13 -1.3782E-13  5.6878E-14  1.3287E-12
 -8.4819E-14 -8.0199E-13 -1.3782E-13  5.0693E-13 -9.9846E-13 -2.1749E-11
  5.2341E-13  2.0288E-12  5.6878E-14 -9.9846E-13  4.2998E-12  6.9776E-11
  5.9254E-12  5.6065E-11  1.3287E-12 -2.1749E-11  6.9776E-11  1.5202E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.311444  -39.948936   -0.366536   -0.021423   -0.934032  2458730.694311
# Heliocentric elements and errors
Epoch:              2458730.5000  =  2019/09/04
Mean Anomaly:           74.78912 +/-     0.159
Argument of Peri:       88.38564 +/-     0.055
Long of Asc Node:      136.99264 +/-     0.000
Inclination:            19.80472 +/-     0.001
Eccentricity:         0.17933842 +/-    0.0016
Semi-Major Axis:     41.95002875 +/-    0.0190
Time of Perihelion: 2438113.1535 +/-      41.6
Perihelion:          34.42677701 +/-    0.0677
Aphelion:            49.47328049 +/-    0.0696
Period (y)              271.7106 +/-      0.18
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.88354673 +/-    0.0026
Ecliptic Y          -26.23154817 +/-    0.0022
Ecliptic Z           -0.92379719 +/-    0.0001
Ecliptic XDOT         0.00194356 +/-    0.0000
Ecliptic YDOT         0.00163545 +/-    0.0000
Ecliptic ZDOT        -0.00090808 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.29779743 +/-    0.0024
Geocenter to KBO     40.35514518 +/-    0.0034
# Hcoef:  7.02

The following table shows the complete astrometric record for 19RO4. 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 (19RO4) followed by the observatory code and reference code for the source of the astrometry.

2019 09  04.193510 21 31 33.430  -16 02 32.09  22.7G 19RO4     G37  C~3JLq      
2019 09  04.265730 21 31 33.074  -16 02 34.14        19RO4     G37  C~3JLq      
2019 09  04.321210 21 31 32.835  -16 02 35.58        19RO4     G37  C~3JLq      
2019 09  07.216320 21 31 20.280  -16 03 47.61  22.8G 19RO4     G37  C~3JLq      
2019 09  07.260390 21 31 20.107  -16 03 48.78        19RO4     G37  C~3JLq      
2019 09  07.300310 21 31 19.935  -16 03 49.83        19RO4     G37  C~3JLq      
2019 10  26.083200 21 29 06.746  -16 17 05.51  23.0G 19RO4     G37  C~3Qz5      
2019 10  26.150510 21 29 06.730  -16 17 05.50        19RO4     G37  C~3Qz5      
2019 10  26.218710 21 29 06.619  -16 17 06.44        19RO4     G37  C~3Qz5      
2020 09  21.121660 21 36 04.790  -16 10 52.97  23.3G 19RO4     G37  C~4Ae6      
2020 09  21.170420 21 36 04.621  -16 10 54.01        19RO4     G37  C~4Ae6      
2021 07  09.323940 21 47 05.242  -15 39 01.71  23.2G 19RO4     G37  C~4v6H      
2021 07  09.370510 21 47 05.036  -15 39 02.64        19RO4     G37  C~4v6H      
2021 07  09.415640 21 47 04.901  -15 39 03.85        19RO4     G37  C~4v6H      

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     0.34       0.00     0.12
     2   0.0002     -5.52    -0.18      -0.32     0.06
     3   0.0003     -9.24    -0.08      -0.59    -0.02
     4   0.0083   -203.72    -0.18     -11.50     0.08
     5   0.0084   -206.46     0.05     -11.82    -0.09
     6   0.0085   -209.14     0.05     -12.03    -0.16
     7   0.1421  -2281.07     0.14    -161.13     0.01
     8   0.1423  -2281.29 (   0.81)   -161.05 (   0.24)
     9   0.1424  -2283.10    -0.14    -161.44    -0.00
    10   1.0484   3545.24    -0.06   -1725.71     0.04
    11   1.0485   3542.60     0.06   -1725.91    -0.04
    12   1.8457  13189.59     0.19   -3055.78    -0.20
    13   1.8458  13186.46    -0.27   -3055.66     0.21
    14   1.8459  13184.21     0.08   -3056.15    -0.01

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.

19RO4    quality flag:2

Type:       SCATEXTD  SCATNEAR  SCATNEAR

axisobj        41.602    41.657    41.548
ecceobj         0.174     0.177     0.172
incobj         19.836    19.836    19.836
qmin           33.804    33.854    33.983
qmax           49.922    50.106    49.594
amean          41.714    41.805    41.653
amin           41.370    41.411    41.224
amax           42.117    42.263    42.090
emean           0.165     0.166     0.157
emin            0.146     0.147     0.136
emax            0.186     0.188     0.181
imean          19.003    19.069    19.030
imin           18.093    18.126    18.109
imax           19.974    20.039    19.994
excite_mean     0.365     0.366     0.362
fracstop        1.000     1.000     1.000
cjmean          2.917     2.917     2.919

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       179.8     179.6     181.6
kozaiamp        180.0     179.9     180.0