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: 01UP18 # Created Sun Dec 22 02:08:19 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 23 observations of 27 # Arc: 18.10y # First observation: 2001/10/19 # Last observation: 2019/11/27 # Chi-squared of fit: 124.42 DOF: 40 RMS: 0.41 # Min/Max residuals: -1.49 0.89 # Exact a, adot, b, bdot, g, gdot: 1.339684E-05 1.749882E-02 2.063609E-06 1.922461E-05 2.029757E-02 9.611525E-04 # Covariance matrix: 1.6506E-13 -3.8671E-14 7.2525E-17 -4.5241E-17 2.9332E-15 -8.9210E-14 -3.8671E-14 1.8678E-14 3.9555E-17 2.7556E-17 -2.2872E-14 5.1992E-14 7.2525E-17 3.9555E-17 1.0247E-13 -7.0521E-15 -9.6591E-16 2.1055E-16 -4.5241E-17 2.7556E-17 -7.0521E-15 1.0241E-15 -6.1937E-17 8.3852E-17 2.9332E-15 -2.2872E-14 -9.6591E-16 -6.1937E-17 2.7227E-13 -9.2310E-14 -8.9210E-14 5.1992E-14 2.1055E-16 8.3852E-17 -9.2310E-14 1.5569E-13 # lat0 lon0 xBary yBary zBary JD0 -1.193101 18.540082 -0.125436 -0.020584 -0.983444 2452201.886133 # Heliocentric elements and errors Epoch: 2452202.5000 = 2001/10/20 Mean Anomaly: 128.99592 +/- 0.063 Argument of Peri: 138.11743 +/- 0.054 Long of Asc Node: 105.46923 +/- 0.005 Inclination: 1.17138 +/- 0.000 Eccentricity: 0.07264122 +/- 0.0000 Semi-Major Axis: 47.92139199 +/- 0.0048 Time of Perihelion: 2408784.8781 +/- 22.4 Perihelion: 44.44032378 +/- 0.0050 Aphelion: 51.40246019 +/- 0.0056 Period (y) 331.7434 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 47.59465211 +/- 0.0012 Ecliptic Y 16.09983086 +/- 0.0004 Ecliptic Z -1.02573157 +/- 0.0000 Ecliptic XDOT -0.00063625 +/- 0.0000 Ecliptic YDOT 0.00227965 +/- 0.0000 Ecliptic ZDOT 0.00000011 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 50.25439229 +/- 0.0011 Geocenter to KBO 49.26697167 +/- 0.0013 # Hcoef: 5.85
The following table shows the complete astrometric record for 01UP18. 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 (01UP18) followed by the observatory code and reference code for the source of the astrometry.
2001 10 19.38539 01 10 14.23 +06 09 45.1 22.3R 01UP18 695 Ce1017 2001 10 19.42801 01 10 14.07 +06 09 44.1 01UP18 695 Ce1017 2001 10 20.37986 01 10 10.43 +06 09 21.1 01UP18 695 Ce1017 2001 11 03.06736 01 09 19.81 +06 04 19.2 22.6 01UP18 304 Ce6643 2001 11 03.11380 01 09 19.65 +06 04 18.0 01UP18 304 Ce6643 2002 11 07.14797 01 12 49.94 +06 25 49.0 22.5R 01UP18 695 Cg7919 2002 11 07.25554 01 12 49.58 +06 25 46.8 01UP18 695 Cg7919 2002 11 28.20372 01 11 46.79 +06 19 45.0 22.4R 01UP18 695 Cg7919 2002 11 28.25993 01 11 46.63 +06 19 44.1 22.4R 01UP18 695 Cg7919 2003 07 08.57223 01 21 20.02 +07 18 41.6 23.0R 01UP18 568 Ci2666 2003 07 09.57786 01 21 21.05 +07 18 46.3 01UP18 568 Ci2666 2005 09 29.38833 01 26 24.39 +07 47 36.8 22.9R 01UP18 688 Co3675 2005 09 29.47074 01 26 24.15 +07 47 34.5 01UP18 688 Co3675 2006 08 31.95230 01 31 37.94 +08 18 55.0 22.4R 01UP18 250 S~06AR 2006 08 31.95670 01 31 37.92 +08 18 54.9 01UP18 250 S~06AR 2006 08 31.96110 01 31 37.91 +08 18 54.9 01UP18 250 S~06AR 2006 08 31.96549 01 31 37.90 +08 18 54.8 01UP18 250 S~06AR 2008 11 01.384615 01 35 26.27 +08 41 03.9 01UP18 645 C~1Cph 2008 11 01.385444 01 35 26.27 +08 41 03.9 01UP18 645 C~1Cph 2008 11 01.387932 01 35 26.26 +08 41 03.8 01UP18 645 C~1Cph 2013 10 07.36994 01 55 44.85 +10 36 58.4 22.8R 01UP18 695 C~0zdE 2013 10 07.49260 01 55 44.40 +10 36 55.7 01UP18 695 C~0zdE 2019 11 27.167630 02 14 57.201 +12 21 26.36 23.1G 01UP18 G37 C~3cVA 2019 11 27.230190 02 14 56.969 +12 21 25.45 01UP18 G37 C~3cVA 2022 11 28.076430 02 26 09.048 +13 19 11.37 23.1G 01UP18 G37 C~66wC 2022 11 28.127470 02 26 08.877 +13 19 10.72 01UP18 G37 C~66wC 2022 11 28.179420 02 26 08.699 +13 19 09.66 01UP18 G37 C~66wC
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 -0.37
2 0.0001 0.00 0.28 0.00 -0.38
3 0.0027 0.00 0.28 0.00 -1.37
4 0.0402 0.00 -0.09 0.00 -0.19
5 0.0403 0.00 0.01 0.00 -0.42
6 1.0507 0.00 0.04 0.00 -0.17
7 1.0510 0.00 0.30 0.00 -0.20
8 1.1083 0.00 0.30 0.00 -0.10
9 1.1085 0.00 0.03 0.00 -0.22
10 1.7171 0.00 -0.51 0.00 -0.34
11 1.7199 0.00 -0.31 0.00 -0.23
12 3.9453 0.00 -1.49 0.00 0.89
13 3.9455 0.00 -0.46 0.00 0.43
14 4.8667 0.00 ( 1.00) 0.00 ( 2.88)
15 4.8667 0.00 ( 0.86) 0.00 ( 2.85)
16 4.8667 0.00 ( 0.87) 0.00 ( 2.92)
17 4.8667 0.00 ( 0.89) 0.00 ( 2.89)
18 7.0363 0.00 -0.06 0.00 -0.50
19 7.0363 0.00 -0.01 0.00 -0.48
20 7.0363 0.00 -0.02 0.00 -0.53
21 11.9671 0.00 -0.55 0.00 0.04
22 11.9674 0.00 -0.31 0.00 -0.09
23 18.1048 0.00 0.50 0.00 -0.43
24 18.1050 0.00 0.29 0.00 -0.28
25 21.1080 0.00 -0.26 0.00 -0.15
26 21.1081 0.00 -0.10 0.00 0.03
27 21.1083 0.00 0.02 0.00 -0.17
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.
01UP18 quality flag:3 Type: 2:1E 2:1E 2:1E axisobj 48.136 48.136 48.136 ecceobj 0.071 0.071 0.071 incobj 1.171 1.171 1.171 qmin 41.125 40.623 41.125 qmax 54.837 55.613 54.910 amean 47.797 47.797 47.797 amin 47.330 47.280 47.327 amax 48.334 48.343 48.314 emean 0.104 0.111 0.107 emin 0.065 0.071 0.071 emax 0.136 0.151 0.137 imean 0.529 0.436 0.450 imin 0.290 0.237 0.241 imax 0.881 0.636 0.636 excite_mean 0.104 0.111 0.108 fracstop 1.000 1.000 1.000 cjmean 3.136 3.134 3.135 libcent 0 180.4 180.3 180.4 libamp 0 133.9 133.9 133.9 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 198.2 187.0 204.7 kozaiamp 179.9 179.9 179.9