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: 21DN19
# Created Wed Jul 17 01:11:49 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 18 observations of 18
# Arc: 8.00y
# First observation: 2016/01/08
# Last observation: 2024/01/09
# Chi-squared of fit: 8.41 DOF: 30 RMS: 0.12
# Min/Max residuals: -0.27 0.28
# Exact a, adot, b, bdot, g, gdot:
1.330500E-05 1.717205E-02 -1.202312E-06 -5.058580E-04 2.023078E-02 -1.538987E-03
# Covariance matrix:
1.0694E-12 -3.3607E-13 -1.1444E-14 7.0934E-15 2.8789E-14 -1.5099E-12
-3.3607E-13 1.0749E-12 9.2778E-14 -3.6575E-14 2.7287E-12 7.4295E-12
-1.1444E-14 9.2778E-14 5.1059E-13 -9.4214E-14 2.5302E-13 6.5746E-13
7.0934E-15 -3.6575E-14 -9.4214E-14 2.0894E-14 -9.6392E-14 -2.5809E-13
2.8789E-14 2.7287E-12 2.5302E-13 -9.6392E-14 7.9159E-12 1.9491E-11
-1.5099E-12 7.4295E-12 6.5746E-13 -2.5809E-13 1.9491E-11 5.2397E-11
# lat0 lon0 xBary yBary zBary JD0
2.766082 114.659109 0.132118 0.047268 -0.973622 2457395.767729
# Heliocentric elements and errors
Epoch: 2457396.5000 = 2016/01/09
Mean Anomaly: 239.20676 +/- 0.281
Argument of Peri: 253.06956 +/- 0.234
Long of Asc Node: 352.79332 +/- 0.007
Inclination: 3.18787 +/- 0.000
Eccentricity: 0.11630143 +/- 0.0002
Semi-Major Axis: 47.16591450 +/- 0.0219
Time of Perihelion: 2497095.6270 +/- 107.3
Perihelion: 41.68045142 +/- 0.0208
Aphelion: 52.65137758 +/- 0.0256
Period (y) 323.9296 +/- 0.23
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -20.88989662 +/- 0.0029
Ecliptic Y 45.80888977 +/- 0.0062
Ecliptic Z 2.38527415 +/- 0.0003
Ecliptic XDOT -0.00202735 +/- 0.0000
Ecliptic YDOT -0.00116255 +/- 0.0000
Ecliptic ZDOT -0.00007840 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 50.40374997 +/- 0.0058
Geocenter to KBO 49.42971548 +/- 0.0069
# Hcoef: 6.43
The following table shows the complete astrometric record for 21DN19. 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 (21DN19) followed by the observatory code and reference code for the source of the astrometry.
2016 01 08.266940 07 48 28.94 +23 54 48.7 23.0r 21DN19 W84 C~6Eqc 2018 02 09.210933 07 54 30.83 +23 35 05.3 23.4i 21DN19 W84 C~6Eqc 2019 03 02.119852 07 57 27.15 +23 24 30.6 23.3V 21DN19 W84 C~6Eqc 2019 03 02.121924 07 57 27.13 +23 24 30.4 21DN19 W84 C~6Eqc 2019 03 03.037631 07 57 24.34 +23 24 36.1 23.8g 21DN19 W84 C~6Eqc 2019 03 03.039406 07 57 24.32 +23 24 35.7 21DN19 W84 C~6Eqc 2020 02 26.085015 08 01 52.04 +23 10 26.9 23.4V 21DN19 W84 C~6Eqc 2020 02 26.095331 08 01 52.01 +23 10 26.8 21DN19 W84 C~6Eqc 2021 02 07.154646 08 07 13.76 +22 53 28.1 23.2i 21DN19 W84 C~6Eqc 2021 02 17.23970 08 06 32.741 +22 55 12.15 23.3r 21DN19 568 C~6DKf 2021 02 17.41289 08 06 32.064 +22 55 13.86 23.4r 21DN19 568 C~6DKf 2021 03 05.111562 08 05 37.90 +22 57 16.3 23.1i 21DN19 W84 C~6Eqc 2021 03 09.05244 08 05 26.647 +22 57 38.22 23.7G 21DN19 304 C~6DKf 2021 03 09.10642 08 05 26.511 +22 57 38.49 23.8G 21DN19 304 C~6DKf 2021 04 02.046130 08 04 42.82 +22 58 29.2 22.6i 21DN19 W84 C~6Eqc 2024 01 09.437570 08 22 00.294 +22 00 57.93 23.4G 21DN19 G37 C~7gyj 2024 01 09.478140 08 22 00.114 +22 00 58.34 21DN19 G37 C~7gyj 2024 01 09.516290 08 21 59.939 +22 00 58.96 21DN19 G37 C~7gyj
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 0.06 0.00 0.16
2 2.0888 0.00 0.01 0.00 -0.02
3 3.1454 0.00 0.06 0.00 0.01
4 3.1454 0.00 -0.14 0.00 -0.20
5 3.1479 0.00 0.08 0.00 0.26
6 3.1479 0.00 -0.14 0.00 -0.15
7 4.1337 0.00 0.02 0.00 0.05
8 4.1337 0.00 0.11 0.00 -0.12
9 5.0839 0.00 -0.13 0.00 -0.07
10 5.1115 0.00 0.03 0.00 -0.06
11 5.1120 0.00 0.09 0.00 0.00
12 5.1549 0.00 -0.27 0.00 0.12
13 5.1657 0.00 0.05 0.00 -0.02
14 5.1659 0.00 0.28 0.00 -0.02
15 5.2314 0.00 -0.02 0.00 -0.15
16 8.0032 0.00 0.09 0.00 0.16
17 8.0033 0.00 0.04 0.00 -0.02
18 8.0034 0.00 -0.09 0.00 0.05
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.
21DN19 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 47.143 47.143 47.143 ecceobj 0.112 0.112 0.112 incobj 3.195 3.195 3.195 qmin 40.988 40.993 40.999 qmax 53.395 53.408 53.388 amean 47.010 47.010 47.011 amin 46.622 46.625 46.618 amax 47.446 47.439 47.453 emean 0.112 0.112 0.112 emin 0.099 0.099 0.100 emax 0.125 0.126 0.125 imean 3.994 3.994 3.994 imin 3.620 3.621 3.620 imax 4.344 4.344 4.343 excite_mean 0.132 0.132 0.132 fracstop 1.000 1.000 1.000 cjmean 3.117 3.117 3.117 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 180.4 180.4 180.4 kozaiamp 180.0 179.9 180.0