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: 02VD131 # Created Sun Dec 22 02:08:27 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 19 observations of 19 # Arc: 17.95y # First observation: 2002/11/07 # Last observation: 2020/10/20 # Chi-squared of fit: 37.21 DOF: 32 RMS: 0.25 # Min/Max residuals: -0.62 0.87 # Exact a, adot, b, bdot, g, gdot: 1.570549E-05 2.297924E-02 -1.888273E-06 1.486690E-04 2.359500E-02 9.448355E-04 # Covariance matrix: 1.6364E-13 -4.0180E-14 2.4826E-16 -2.0159E-16 -2.9439E-14 -7.5454E-14 -4.0180E-14 5.1308E-14 -2.2110E-16 2.8644E-16 -9.8475E-14 1.1444E-13 2.4826E-16 -2.2110E-16 1.2439E-13 -8.9286E-15 -7.0922E-17 -5.2861E-16 -2.0159E-16 2.8644E-16 -8.9286E-15 1.6274E-15 -4.6792E-16 6.6358E-16 -2.9439E-14 -9.8475E-14 -7.0922E-17 -4.6792E-16 6.2138E-13 -2.1066E-13 -7.5454E-14 1.1444E-13 -5.2861E-16 6.6358E-16 -2.1066E-13 2.6422E-13 # lat0 lon0 xBary yBary zBary JD0 -0.781598 20.227144 -0.402956 -0.012344 -0.902357 2452585.665373 # Heliocentric elements and errors Epoch: 2452586.5000 = 2002/11/08 Mean Anomaly: 46.39355 +/- 0.064 Argument of Peri: 244.49589 +/- 0.073 Long of Asc Node: 84.38503 +/- 0.006 Inclination: 0.85431 +/- 0.000 Eccentricity: 0.06273664 +/- 0.0001 Semi-Major Axis: 45.14088833 +/- 0.0070 Time of Perihelion: 2438310.4291 +/- 20.1 Perihelion: 42.30890063 +/- 0.0077 Aphelion: 47.97287603 +/- 0.0084 Period (y) 303.2937 +/- 0.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 40.47072052 +/- 0.0013 Ecliptic Y 15.34759188 +/- 0.0005 Ecliptic Z -0.57819473 +/- 0.0000 Ecliptic XDOT -0.00082625 +/- 0.0000 Ecliptic YDOT 0.00253651 +/- 0.0000 Ecliptic ZDOT 0.00001596 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.28694295 +/- 0.0013 Geocenter to KBO 42.38187894 +/- 0.0014 # Hcoef: 6.62
The following table shows the complete astrometric record for 02VD131. 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 (02VD131) followed by the observatory code and reference code for the source of the astrometry.
2002 11 07.16463 01 15 54.06 +07 10 50.8 22.3R 02VD131 695 Cg8319 2002 11 07.27232 01 15 53.63 +07 10 48.2 02VD131 695 Cg8319 2002 11 30.25812 01 14 35.70 +07 03 15.4 22.4R 02VD131 568 Cg8319 2002 12 01.24981 01 14 33.05 +07 03 00.4 02VD131 568 Cg8319 2002 12 01.32144 01 14 32.91 +07 02 58.7 02VD131 568 Cg8319 2003 10 23.16513 01 21 52.92 +07 47 13.1 23.0R 02VD131 695 Cj4694 2003 10 23.26048 01 21 52.48 +07 47 10.5 02VD131 695 Cj4694 2003 11 20.13563 01 20 00.45 +07 36 16.1 22.8R 02VD131 695 Cj4694 2003 11 20.21942 01 20 00.15 +07 36 14.5 02VD131 695 Cj4694 2004 09 13.33140 01 29 31.55 +08 33 09.8 22.6R 02VD131 304 Cl4339 2004 09 13.33377 01 29 31.55 +08 33 09.8 02VD131 304 Cl4339 2004 09 13.35563 01 29 31.47 +08 33 09.4 02VD131 304 Cl4339 2004 09 13.35800 01 29 31.46 +08 33 09.2 02VD131 304 Cl4339 2013 10 05.43707 02 12 22.63 +12 36 41.4 22.6R 02VD131 695 C~0zdT 2013 10 05.50088 02 12 22.38 +12 36 40.4 02VD131 695 C~0zdT 2013 10 06.45646 02 12 18.42 +12 36 19.5 02VD131 695 C~0zdT 2020 10 20.309230 02 45 53.852 +15 25 10.68 23.1G 02VD131 G37 C~4KoC 2020 10 20.372330 02 45 53.555 +15 25 09.88 02VD131 G37 C~4KoC 2020 10 20.451650 02 45 53.248 +15 25 08.06 02VD131 G37 C~4KoC
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 -0.21 0.00 0.36
2 0.0003 0.00 -0.14 0.00 0.27
3 0.0632 0.00 0.11 0.00 -0.01
4 0.0659 0.00 0.06 0.00 0.01
5 0.0661 0.00 0.87 0.00 -0.62
6 0.9582 0.00 -0.02 0.00 0.03
7 0.9585 0.00 -0.23 0.00 -0.09
8 1.0348 0.00 -0.27 0.00 -0.12
9 1.0351 0.00 -0.36 0.00 -0.07
10 1.8512 0.00 -0.06 0.00 0.04
11 1.8513 0.00 0.07 0.00 0.09
12 1.8513 0.00 0.07 0.00 0.16
13 1.8513 0.00 0.05 0.00 0.01
14 10.9111 0.00 -0.06 0.00 -0.21
15 10.9113 0.00 0.18 0.00 0.17
16 10.9139 0.00 0.04 0.00 -0.06
17 17.9525 0.00 -0.12 0.00 -0.22
18 17.9527 0.00 -0.33 0.00 0.24
19 17.9529 0.00 0.39 0.00 0.02
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.
02VD131 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.509 45.509 45.509 ecceobj 0.070 0.070 0.070 incobj 0.853 0.853 0.853 qmin 42.000 42.000 42.000 qmax 49.092 49.077 49.087 amean 45.427 45.423 45.424 amin 45.309 45.308 45.305 amax 45.558 45.554 45.556 emean 0.064 0.064 0.064 emin 0.049 0.049 0.049 emax 0.078 0.078 0.078 imean 0.983 0.983 0.983 imin 0.407 0.407 0.407 imax 1.331 1.332 1.331 excite_mean 0.067 0.067 0.066 fracstop 1.000 1.000 1.000 cjmean 3.113 3.113 3.113 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 189.9 189.8 189.8 kozaiamp 180.0 180.0 180.0