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: 18VN35 # Created Mon Apr 28 01:11:11 2025 # Orbit generated from Bernstein formalism # Fitting 11 observations of 11 # Arc: 1.13y # First observation: 2018/11/10 # Last observation: 2019/12/28 Preliminary a, adot, b, bdot, g, gdot: -0.000077 0.012760 -0.000003 0.005760 0.017310 0.000000 # Chi-squared of fit: 4.46 DOF: 16 RMS: 0.11 # Min/Max residuals: -0.22 0.31 # Exact a, adot, b, bdot, g, gdot: 1.134806E-05 1.291525E-02 4.979724E-06 5.815798E-03 1.762200E-02 8.946549E-03 # Covariance matrix: 6.2692E-13 4.4548E-13 -1.0220E-13 1.1224E-12 1.3017E-12 1.6280E-10 4.4548E-13 2.9423E-12 -3.7772E-13 4.5062E-12 3.8057E-12 6.5622E-10 -1.0220E-13 -3.7772E-13 3.2606E-13 -9.9892E-13 -5.9035E-13 -1.0634E-10 1.1224E-12 4.5062E-12 -9.9892E-13 9.4125E-12 6.9363E-12 1.2908E-09 1.3017E-12 3.8057E-12 -5.9035E-13 6.9363E-12 6.2475E-12 1.0094E-09 1.6280E-10 6.5622E-10 -1.0634E-10 1.2908E-09 1.0094E-09 1.8812E-07 # lat0 lon0 xBary yBary zBary JD0 -8.598058 73.056632 0.421234 -0.134753 -0.891912 2458432.946721 # Heliocentric elements and errors Epoch: 2458430.5000 = 2018/11/08 Mean Anomaly: 29.26240 +/- 2.429 Argument of Peri: 244.51196 +/- 0.294 Long of Asc Node: 90.86565 +/- 0.002 Inclination: 25.43606 +/- 0.003 Eccentricity: 0.59318946 +/- 0.0287 Semi-Major Axis: 83.91816225 +/- 4.4263 Time of Perihelion: 2435606.6015 +/- 572.5 Perihelion: 34.13879250 +/- 3.0078 Aphelion: 133.69753201 +/- 7.4522 Period (y) 768.7624 +/- 60.82 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 17.01736676 +/- 0.0023 Ecliptic Y 54.40700903 +/- 0.0076 Ecliptic Z -8.48357748 +/- 0.0012 Ecliptic XDOT -0.00147194 +/- 0.0000 Ecliptic YDOT 0.00202634 +/- 0.0001 Ecliptic ZDOT 0.00068542 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 57.63405669 +/- 0.0072 Geocenter to KBO 56.74726338 +/- 0.0080 # Hcoef: 7.56
The following table shows the complete astrometric record for 18VN35. 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 (18VN35) followed by the observatory code and reference code for the source of the astrometry.
2018 11 10.44592 04 50 56.908 +13 49 53.82 25.1r 18VN35 568 C~2ygZ 2018 11 10.61751 04 50 56.305 +13 49 52.67 18VN35 568 C~2ygZ 2018 12 10.15854 04 49 06.138 +13 47 29.25 18VN35 304 C~2ygZ 2018 12 10.20293 04 49 05.931 +13 47 29.23 18VN35 304 C~2ygZ 2018 12 12.20516 04 48 58.245 +13 47 24.10 25.2r 18VN35 304 C~2ygZ 2019 03 01.03327 04 45 59.963 +13 54 34.17 25.1r 18VN35 304 C~4ZZD 2019 03 02.03475 04 46 00.174 +13 54 46.83 25.1r 18VN35 304 C~4ZZD 2019 12 27.13671 04 50 54.610 +14 12 08.69 18VN35 304 C~4ZZD 2019 12 27.18886 04 50 54.406 +14 12 08.75 18VN35 304 C~4ZZD 2019 12 28.11862 04 50 51.138 +14 12 09.35 18VN35 304 C~4ZZD 2019 12 28.15221 04 50 51.023 +14 12 09.20 18VN35 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 0.05 0.00 0.05
2 0.0005 -8.86 -0.04 -0.09 0.05
3 0.0813 -1619.21 0.31 50.65 -0.10
4 0.0815 -1622.21 -0.16 51.00 0.06
5 0.0870 -1733.98 -0.16 59.49 -0.06
6 0.3028 -4258.45 0.05 805.73 0.02
7 0.3055 -4253.82 -0.05 817.91 -0.04
8 1.1271 126.19 -0.00 1329.33 -0.05
9 1.1273 123.25 -0.22 1329.75 0.02
10 1.1298 76.14 0.08 1336.02 0.11
11 1.1299 74.46 0.14 1336.07 -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.
18VN35 quality flag:1 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 86.122 102.386 75.520 ecceobj 0.600 0.678 0.521 incobj 25.320 25.320 25.321 qmin 33.197 31.704 35.059 qmax 139.349 174.861 115.564 amean 84.652 100.412 74.396 amin 83.161 98.299 73.328 amax 86.770 103.902 75.967 emean 0.594 0.666 0.510 emin 0.581 0.648 0.492 emax 0.608 0.683 0.527 imean 23.876 24.852 24.256 imin 23.106 23.207 23.375 imax 24.628 26.826 25.237 excite_mean 0.719 0.788 0.655 fracstop 1.000 1.000 1.000 cjmean 2.823 2.771 2.869 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 187.8 169.0 178.2 kozaiamp 180.0 180.0 180.0