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: 18VO35 # Created Mon Apr 28 01:11:11 2025 # Orbit generated from Bernstein formalism # Fitting 11 observations of 11 # Arc: 1.05y # First observation: 2018/11/10 # Last observation: 2019/11/30 Preliminary a, adot, b, bdot, g, gdot: -0.000031 0.010661 0.000003 -0.003195 0.015214 0.000000 # Chi-squared of fit: 6.63 DOF: 16 RMS: 0.14 # Min/Max residuals: -0.22 0.39 # Exact a, adot, b, bdot, g, gdot: 1.143213E-05 1.058075E-02 -4.321173E-06 -3.157313E-03 1.527007E-02 -7.670132E-03 # Covariance matrix: 6.2861E-13 1.2422E-12 8.5991E-14 -8.1895E-13 1.4714E-12 2.1521E-10 1.2422E-12 1.4698E-11 7.8351E-13 -7.1530E-12 1.0157E-11 1.8703E-09 8.5991E-14 7.8351E-13 2.7421E-13 -7.1706E-13 5.7670E-13 1.0685E-10 -8.1895E-13 -7.1530E-12 -7.1706E-13 4.7207E-12 -5.3138E-12 -9.7602E-10 1.4714E-12 1.0157E-11 5.7670E-13 -5.3138E-12 7.9900E-12 1.3910E-09 2.1521E-10 1.8703E-09 1.0685E-10 -9.7602E-10 1.3910E-09 2.5522E-07 # lat0 lon0 xBary yBary zBary JD0 -8.739097 83.142345 0.572090 -0.123683 -0.805296 2458432.987961 # Heliocentric elements and errors Epoch: 2458430.5000 = 2018/11/08 Mean Anomaly: 329.84233 +/- 3.766 Argument of Peri: 310.54216 +/- 0.722 Long of Asc Node: 236.20139 +/- 0.008 Inclination: 18.82813 +/- 0.005 Eccentricity: 0.62771351 +/- 0.0388 Semi-Major Axis: 94.14905300 +/- 7.4937 Time of Perihelion: 2486382.8060 +/- 1021.8 Perihelion: 35.05042092 +/- 4.5984 Aphelion: 153.24768508 +/- 12.7335 Period (y) 913.5496 +/- 109.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 8.39352831 +/- 0.0015 Ecliptic Y 64.99756138 +/- 0.0119 Ecliptic Z -9.95019380 +/- 0.0019 Ecliptic XDOT -0.00204842 +/- 0.0000 Ecliptic YDOT -0.00121077 +/- 0.0001 Ecliptic ZDOT -0.00035077 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 66.28831466 +/- 0.0117 Geocenter to KBO 65.48758126 +/- 0.0121 # Hcoef: 6.75
The following table shows the complete astrometric record for 18VO35. 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 (18VO35) followed by the observatory code and reference code for the source of the astrometry.
2018 11 10.48716 05 31 59.323 +14 32 01.13 24.7r 18VO35 568 C~2ygZ 2018 11 10.58061 05 31 59.072 +14 32 00.16 24.8r 18VO35 568 C~2ygZ 2018 12 09.25228 05 30 30.474 +14 28 42.53 18VO35 304 C~2ygZ 2018 12 10.24562 05 30 27.140 +14 28 37.60 24.9r 18VO35 304 C~2ygZ 2018 12 11.25815 05 30 23.755 +14 28 32.39 18VO35 304 C~2ygZ 2019 02 02.10060 05 27 47.432 +14 27 43.91 24.8r 18VO35 304 C~2ygZ 2019 02 03.07790 05 27 45.461 +14 27 47.21 24.9r 18VO35 304 C~2ygZ 2019 03 01.02627 05 27 13.110 +14 29 45.88 25.0r 18VO35 304 C~4ZZD 2019 03 02.02761 05 27 12.675 +14 29 51.65 25.0r 18VO35 304 C~4ZZD 2019 11 29.25582 05 33 37.032 +14 20 30.81 24.9r 18VO35 304 C~4ZZD 2019 11 30.25092 05 33 33.811 +14 20 24.28 25.0r 18VO35 304 C~4ZZD
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 -0.10 0.00 0.22
2 0.0003 -3.69 -0.06 -0.79 0.03
3 0.0788 -1298.57 -0.11 -134.00 -0.07
4 0.0815 -1347.18 -0.00 -136.47 0.02
5 0.0842 -1396.54 0.39 -139.18 -0.22
6 0.2289 -3666.82 -0.09 -69.02 -0.14
7 0.2316 -3695.23 -0.14 -64.19 0.22
8 0.3026 -4158.16 0.10 79.70 0.02
9 0.3054 -4164.16 0.00 85.81 -0.11
10 1.0507 1384.47 -0.01 -757.92 0.11
11 1.0534 1337.40 0.01 -762.22 -0.08
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.
18VO35 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0