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: 19CB31
# Created Tue Apr 1 01:11:11 2025
# Orbit generated from Bernstein formalism
# Fitting 15 observations of 15
# Arc: 0.98y
# First observation: 2019/02/05
# Last observation: 2020/01/30
Preliminary a, adot, b, bdot, g, gdot:
0.000006 0.025736 -0.000001 -0.001930 0.025477 0.000000
# Chi-squared of fit: 11.65 DOF: 24 RMS: 0.16
# Min/Max residuals: -0.40 0.28
# Exact a, adot, b, bdot, g, gdot:
1.544156E-05 2.580198E-02 -7.638834E-07 -1.936633E-03 2.531980E-02 -1.756069E-04
# Covariance matrix:
4.8688E-13 1.3797E-11 2.1952E-14 -1.1016E-12 4.7014E-12 5.3883E-10
1.3797E-11 1.2263E-09 2.5117E-12 -9.6129E-11 3.7424E-10 4.6642E-08
2.1952E-14 2.5117E-12 1.5257E-13 -3.8937E-13 7.5097E-13 9.5353E-11
-1.1016E-12 -9.6129E-11 -3.8937E-13 8.2816E-12 -2.9365E-11 -3.6587E-09
4.7014E-12 3.7424E-10 7.5097E-13 -2.9365E-11 1.1531E-10 1.4259E-08
5.3883E-10 4.6642E-08 9.5353E-11 -3.6587E-09 1.4259E-08 1.7754E-06
# lat0 lon0 xBary yBary zBary JD0
4.773353 -176.673978 0.730260 0.055926 -0.668975 2458520.059171
# Heliocentric elements and errors
Epoch: 2458520.5000 = 2019/02/06
Mean Anomaly: 338.51066 +/- 35.933
Argument of Peri: 156.40349 +/- 41.973
Long of Asc Node: 50.39882 +/- 0.054
Inclination: 6.29312 +/- 0.005
Eccentricity: 0.06989017 +/- 0.0197
Semi-Major Axis: 42.93036985 +/- 0.0099
Time of Perihelion: 2464653.4009 +/- 10255.1
Perihelion: 39.92995917 +/- 0.8438
Aphelion: 45.93078054 +/- 0.8438
Period (y) 281.2906 +/- 0.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -40.00298187 +/- 0.0167
Ecliptic Y -1.60145875 +/- 0.0010
Ecliptic Z 3.28649015 +/- 0.0014
Ecliptic XDOT 0.00017141 +/- 0.0001
Ecliptic YDOT -0.00278686 +/- 0.0000
Ecliptic ZDOT -0.00021047 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.16969313 +/- 0.0166
Geocenter to KBO 39.49478516 +/- 0.0167
# Hcoef: 8.01
The following table shows the complete astrometric record for 19CB31. 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 (19CB31) followed by the observatory code and reference code for the source of the astrometry.
2019 02 05.55837 12 19 47.76 +03 03 29.4 24.1i 19CB31 T09 C~870W 2019 02 05.60340 12 19 47.63 +03 03 30.7 23.7i 19CB31 T09 C~870W 2019 02 05.63031 12 19 47.53 +03 03 31.0 23.9i 19CB31 T09 C~870W 2019 02 28.581121 12 18 27.06 +03 13 37.3 19CB31 T09 C~870W 2019 03 03.58484 12 18 14.42 +03 15 05.9 23.6z 19CB31 T09 C~870W 2019 03 03.58751 12 18 14.44 +03 15 05.7 23.5z 19CB31 T09 C~870W 2019 03 03.62510 12 18 14.26 +03 15 06.7 23.7z 19CB31 T09 C~870W 2019 03 03.64387 12 18 14.17 +03 15 07.4 23.8z 19CB31 T09 C~870W 2019 04 04.452290 12 15 48.25 +03 30 41.0 19CB31 T09 C~870W 2019 04 04.47203 12 15 48.15 +03 30 41.8 25.0g 19CB31 T09 C~8HR5 2019 04 04.474112 12 15 48.14 +03 30 41.3 19CB31 T09 C~870W 2019 04 06.309020 12 15 39.73 +03 31 31.3 19CB31 T09 C~870W 2020 01 28.555369 12 25 22.24 +02 19 16.9 19CB31 T09 C~870W 2020 01 30.609170 12 25 18.01 +02 19 55.6 19CB31 T09 C~870W 2020 01 30.663460 12 25 17.88 +02 19 56.5 19CB31 T09 C~870W
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 0.14 0.00 -0.09
2 0.0001 -2.30 -0.00 0.42 0.15
3 0.0002 -3.80 -0.20 0.10 -0.28
4 0.0630 -1350.75 0.10 77.32 -0.10
5 0.0713 -1559.68 -0.27 83.41 0.28
6 0.0713 -1559.32 0.28 83.34 0.21
7 0.0714 -1562.19 0.09 83.19 0.01
8 0.0714 -1563.71 -0.09 83.30 0.09
9 0.1585 -3940.22 0.03 72.62 -0.08
10 0.1586 -3941.91 -0.17 72.76 0.12
11 0.1586 -3941.85 0.05 72.24 -0.40
12 0.1636 -4077.32 0.06 68.18 0.08
13 0.9774 5654.83 0.02 -437.48 0.01
14 0.9830 5581.20 0.02 -427.26 0.09
15 0.9832 5579.06 -0.04 -427.21 -0.09
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.
19CB31 quality flag:2 Type: CLASSICAL SCATNEAR CLASSICAL axisobj 42.682 44.336 42.482 ecceobj 0.062 0.144 0.094 incobj 6.305 6.288 6.313 qmin 39.174 34.617 38.065 qmax 46.745 55.121 47.478 amean 42.850 44.528 42.654 amin 42.516 44.060 42.309 amax 43.213 45.105 43.032 emean 0.061 0.182 0.078 emin 0.042 0.129 0.051 emax 0.082 0.224 0.104 imean 4.676 6.117 4.127 imin 3.692 4.090 2.380 imax 5.780 8.001 5.626 excite_mean 0.102 0.211 0.107 fracstop 1.000 1.000 1.000 cjmean 3.076 3.052 3.072 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 179.9 171.7 182.3 kozaiamp 180.0 179.9 180.0