Orbit Fit and Astrometric record for 19CF30

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: 19CF30    
# Created Tue Apr  1 01:11:10 2025
# Orbit generated from Bernstein formalism
# Fitting     15 observations of     15
# Arc:  58.99d
# First observation: 2019/02/05
#  Last observation: 2019/04/05
Preliminary a, adot, b, bdot, g, gdot:
   0.000000   0.026034  -0.000001  -0.001739   0.025102   0.000000
# Chi-squared of fit:     9.48 DOF:     24 RMS:  0.14
# Min/Max residuals:    -0.31    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.567981E-05  2.422166E-02 -9.564483E-07 -1.687576E-03  2.462020E-02 -2.893356E-03
# Covariance matrix:
  5.4876E-13  1.0153E-10 -8.8036E-14 -2.6623E-12  2.2842E-11  1.4604E-09
  1.0153E-10  1.7496E-07 -1.3966E-10 -4.3789E-09  3.6051E-08  1.7803E-06
 -8.8036E-14 -1.3966E-10  4.8767E-13  9.5744E-13 -2.8844E-11 -1.4392E-09
 -2.6623E-12 -4.3789E-09  9.5744E-13  1.3276E-10 -9.0314E-10 -4.4770E-08
  2.2842E-11  3.6051E-08 -2.8844E-11 -9.0314E-10  7.4471E-09  3.7193E-07
  1.4604E-09  1.7803E-06 -1.4392E-09 -4.4770E-08  3.7193E-07  1.9570E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.583678 -176.610845    0.730656    0.053674   -0.668723  2458520.087891
# Heliocentric elements and errors
Epoch:              2458520.5000  =  2019/02/06
Mean Anomaly:          291.75377 +/-     3.643
Argument of Peri:      215.12486 +/-    20.000
Long of Asc Node:       51.35955 +/-     0.510
Inclination:             5.96680 +/-     0.047
Eccentricity:         0.14237295 +/-    0.1794
Semi-Major Axis:     42.74649241 +/-    1.1549
Time of Perihelion: 2477872.4766 +/-     672.2
Perihelion:          36.66054802 +/-    7.7337
Aphelion:            48.83243680 +/-    7.7826
Period (y)              279.4853 +/-     11.33
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.12815740 +/-    0.1417
Ecliptic Y           -1.71190803 +/-    0.0084
Ecliptic Z            3.24586050 +/-    0.0114
Ecliptic XDOT         0.00047247 +/-    0.0005
Ecliptic YDOT        -0.00267240 +/-    0.0001
Ecliptic ZDOT        -0.00021298 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.29154357 +/-    0.1411
Geocenter to KBO     40.61705320 +/-    0.1424
# Hcoef:  8.63

The following table shows the complete astrometric record for 19CF30. 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 (19CF30) followed by the observatory code and reference code for the source of the astrometry.

2019 02  05.58709  12 19 43.51   +02 51 32.8   24.3i 19CF30    T09  C~83G7      
2019 02  05.60340  12 19 43.47   +02 51 33.2   24.5i 19CF30    T09  C~83G7      
2019 02  05.63031  12 19 43.39   +02 51 33.7   24.2i 19CF30    T09  C~83G7      
2019 03  03.58484  12 18 12.14   +03 02 52.0   24.0z 19CF30    T09  C~83G7      
2019 03  03.62510  12 18 11.94   +03 02 53.6   24.1z 19CF30    T09  C~83G7      
2019 03  03.64387  12 18 11.88   +03 02 54.0   24.3z 19CF30    T09  C~83G7      
2019 04  04.45230  12 15 49.11   +03 18 10.9   25.5g 19CF30    T09  C~83G7      
2019 04  04.46143  12 15 49.06   +03 18 11.1   25.6g 19CF30    T09  C~83G7      
2019 04  04.47203  12 15 48.99   +03 18 11.4   25.4g 19CF30    T09  C~83G7      
2019 04  04.49512  12 15 48.89   +03 18 11.9   25.2g 19CF30    T09  C~83G7      
2019 04  04.51398  12 15 48.82   +03 18 12.4   25.4g 19CF30    T09  C~83G7      
2019 04  05.52450  12 15 44.24   +03 18 39.7   24.8r 19CF30    T09  C~83G7      
2019 04  05.53497  12 15 44.20   +03 18 39.9   24.5r 19CF30    T09  C~83G7      
2019 04  05.55801  12 15 44.08   +03 18 40.6   25.1r 19CF30    T09  C~83G7      
2019 04  05.57686  12 15 44.01   +03 18 40.9   25.1r 19CF30    T09  C~83G7      

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    -0.03
     2   0.0000     -0.71     0.03       0.13     0.04
     3   0.0001     -2.01     0.00       0.11    -0.08
     4   0.0712  -1525.95     0.26      79.30    -0.11
     5   0.0713  -1529.34    -0.31      79.58     0.12
     6   0.0713  -1530.32     0.01      79.59     0.11
     7   0.1584  -3857.29     0.28      72.25     0.13
     8   0.1585  -3858.05     0.18      72.13     0.04
     9   0.1585  -3859.13    -0.11      71.99    -0.07
    10   0.1585  -3860.71     0.02      71.86    -0.14
    11   0.1586  -3861.87     0.25      71.90    -0.05
    12   0.1614  -3935.68    -0.20      69.75     0.06
    13   0.1614  -3936.31    -0.06      69.70     0.03
    14   0.1615  -3938.24    -0.30      69.63     0.02
    15   0.1615  -3939.32    -0.01      69.48    -0.07

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.

19CF30    quality flag:1

Type:       SCATNEAR  CENTAURR  SCATNEAR

axisobj        42.447    57.066    41.522
ecceobj         0.137     0.597     0.130
incobj          5.979     6.143     6.004
qmin           34.228    22.363    30.480
qmax           51.562    93.119    58.792
amean          42.614    55.101    41.610
amin           42.166    53.163    39.325
amax           43.060    58.186    45.304
emean           0.151     0.584     0.198
emin            0.118     0.569     0.124
emax            0.199     0.600     0.308
imean           6.851     5.526     8.979
imin            4.508     5.278     5.089
imax            9.142     5.676    12.579
excite_mean     0.195     0.592     0.253
fracstop        1.000     0.019     1.000
cjmean          3.038     2.730     2.997

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       182.8     253.3     182.6
kozaiamp        180.0      17.0     180.0