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: 98KY61 # Created Thu Apr 25 01:09:37 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 59 observations of 60 # Arc: 25.30y # First observation: 1998/05/20 # Last observation: 2023/09/06 # Chi-squared of fit: 80.28 DOF: 112 RMS: 0.21 # Min/Max residuals: -0.81 0.78 # Exact a, adot, b, bdot, g, gdot: 1.345077E-05 1.959217E-02 -2.125566E-06 -7.026663E-04 2.175304E-02 3.402951E-04 # Covariance matrix: 3.6490E-14 -3.8021E-15 -7.8443E-17 1.3690E-16 3.2672E-14 -8.4531E-15 -3.8021E-15 7.2787E-15 1.3728E-16 -2.3342E-16 1.4362E-14 1.4851E-14 -7.8443E-17 1.3728E-16 3.0987E-14 -1.7413E-15 1.0586E-17 3.2927E-16 1.3690E-16 -2.3342E-16 -1.7413E-15 4.8105E-16 8.7744E-18 -5.6270E-16 3.2672E-14 1.4362E-14 1.0586E-17 8.7744E-18 3.1137E-13 1.3913E-15 -8.4531E-15 1.4851E-14 3.2927E-16 -5.6270E-16 1.3913E-15 3.5592E-14 # lat0 lon0 xBary yBary zBary JD0 -0.026791 -55.201539 0.927446 -0.000395 -0.410489 2450953.830171 # Heliocentric elements and errors Epoch: 2450954.5000 = 1998/05/21 Mean Anomaly: 187.49342 +/- 0.030 Argument of Peri: 353.83036 +/- 0.016 Long of Asc Node: 122.91571 +/- 0.000 Inclination: 2.05109 +/- 0.000 Eccentricity: 0.04050887 +/- 0.0001 Semi-Major Axis: 44.60424773 +/- 0.0042 Time of Perihelion: 2503093.8875 +/- 12.0 Perihelion: 42.79738006 +/- 0.0051 Aphelion: 46.41111540 +/- 0.0054 Period (y) 297.9014 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 25.71648893 +/- 0.0007 Ecliptic Y -38.61775441 +/- 0.0010 Ecliptic Z -0.02160173 +/- 0.0000 Ecliptic XDOT 0.00205100 +/- 0.0000 Ecliptic YDOT 0.00138097 +/- 0.0000 Ecliptic ZDOT -0.00008854 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.39686987 +/- 0.0009 Geocenter to KBO 45.97059397 +/- 0.0012 # Hcoef: 7.29
The following table shows the complete astrometric record for 98KY61. 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 (98KY61) followed by the observatory code and reference code for the source of the astrometry.
1998 05 20.32944 20 28 36.04 -19 05 27.6 24.6R 98KY61 807 Ca1784 1998 05 20.33653 20 28 36.02 -19 05 28.0 23.4R 98KY61 807 Ca1784 1998 05 20.34340 20 28 36.02 -19 05 27.9 23.2R 98KY61 807 Ca1784 1998 05 20.35028 20 28 36.01 -19 05 28.0 24.4R 98KY61 807 Ca1784 1998 05 20.35801 20 28 36.00 -19 05 27.9 23.9R 98KY61 807 Ca1784 1998 05 20.36495 20 28 35.99 -19 05 28.0 23.7R 98KY61 807 Ca1784 1998 05 20.37190 20 28 35.98 -19 05 28.0 23.5R 98KY61 807 Ca1784 1998 05 20.37882 20 28 35.97 -19 05 28.2 23.5R 98KY61 807 Ca1784 1998 05 20.38569 20 28 35.97 -19 05 28.1 23.4R 98KY61 807 Ca1784 1998 05 20.39264 20 28 35.95 -19 05 28.2 23.5R 98KY61 807 Ca1784 1998 05 20.39951 20 28 35.94 -19 05 28.2 24.1R 98KY61 807 Ca1784 1998 05 20.41333 20 28 35.93 -19 05 28.3 23.2R 98KY61 807 Ca1784 1998 05 20.42020 20 28 35.92 -19 05 28.4 23.3R 98KY61 807 Ca1784 1998 05 20.42707 20 28 35.91 -19 05 28.3 24.3R 98KY61 807 Ca1784 1998 05 20.43394 20 28 35.90 -19 05 28.4 23.6R 98KY61 807 Ca1784 1998 05 29.33005 20 28 20.81 -19 06 25.4 23.3R 98KY61 807 Ca1784 1998 05 29.33693 20 28 20.81 -19 06 25.3 24.0R 98KY61 807 Ca1784 1998 05 29.34380 20 28 20.79 -19 06 25.5 23.5R 98KY61 807 Ca1784 1998 05 29.35067 20 28 20.77 -19 06 25.5 24.0R 98KY61 807 Ca1784 1998 05 29.35755 20 28 20.76 -19 06 25.6 24.1R 98KY61 807 Ca1784 1998 05 29.36443 20 28 20.75 -19 06 25.6 24.0R 98KY61 807 Ca1784 1998 05 29.37131 20 28 20.74 -19 06 25.7 23.6R 98KY61 807 Ca1784 1998 05 29.37818 20 28 20.72 -19 06 25.9 23.8R 98KY61 807 Ca1784 1998 05 29.38506 20 28 20.70 -19 06 25.9 23.8R 98KY61 807 Ca1784 1998 05 29.39193 20 28 20.68 -19 06 25.9 24.2R 98KY61 807 Ca1784 1998 05 29.39881 20 28 20.68 -19 06 26.0 23.6R 98KY61 807 Ca1784 1998 05 29.40568 20 28 20.66 -19 06 25.9 23.9R 98KY61 807 Ca1784 1998 05 30.31126 20 28 18.78 -19 06 32.9 23.6R 98KY61 807 Ca1784 1998 05 30.31814 20 28 18.77 -19 06 32.9 23.4R 98KY61 807 Ca1784 1998 05 30.32501 20 28 18.76 -19 06 33.0 23.6R 98KY61 807 Ca1784 1998 05 30.33189 20 28 18.74 -19 06 33.0 23.7R 98KY61 807 Ca1784 1998 05 30.33876 20 28 18.72 -19 06 33.1 23.7R 98KY61 807 Ca1784 1998 05 30.34564 20 28 18.71 -19 06 33.1 23.8R 98KY61 807 Ca1784 1998 05 30.35267 20 28 18.69 -19 06 33.2 23.4R 98KY61 807 Ca1784 1998 05 30.35954 20 28 18.66 -19 06 33.2 23.7R 98KY61 807 Ca1784 1998 05 30.36642 20 28 18.65 -19 06 33.3 23.6R 98KY61 807 Ca1784 1998 05 30.37329 20 28 18.62 -19 06 33.4 23.5R 98KY61 807 Ca1784 1998 05 30.38032 20 28 18.62 -19 06 33.6 23.7R 98KY61 807 Ca1784 1998 05 30.38719 20 28 18.60 -19 06 33.5 23.7R 98KY61 807 Ca1784 1998 06 30.45556 20 26 41.43 -19 12 25.9 98KY61 568 Ca1784 1998 06 30.48295 20 26 41.31 -19 12 26.2 98KY61 568 Ca1784 1998 07 01.44990 20 26 37.48 -19 12 40.0 98KY61 568 Ca1784 2000 07 29.08958 20 34 01.30 -18 51 40.4 22.9R 98KY61 807 Ch1065 2000 07 29.19720 20 34 00.82 -18 51 42.0 98KY61 807 Ch1065 2001 06 26.46844 20 40 59.55 -18 28 06.2 98KY61 568 Cd2199 2001 06 26.49992 20 40 59.43 -18 28 06.2 98KY61 568 Cd2199 2001 06 27.41677 20 40 56.13 -18 28 19.2 98KY61 568 Cd2199 2005 06 14.420775 21 00 05.59 -17 21 45.4 98KY61 645 C~1cF1 2005 06 14.421604 21 00 05.59 -17 21 45.4 98KY61 645 C~1cF1 2005 06 14.424092 21 00 05.58 -17 21 45.5 98KY61 645 C~1cF1 2013 10 06.11748 21 29 45.48 -15 28 50.8 24.1R 98KY61 695 C~0zdB 2013 10 07.14082 21 29 42.64 -15 28 55.2 98KY61 695 C~0zdB 2013 10 07.22721 21 29 42.45 -15 28 55.5 98KY61 695 C~0zdB 2015 04 09.386319 21 44 16.798 -14 19 28.36 23.4R 98KY61 309 C~1PqX 2015 04 09.395995 21 44 16.827 -14 19 28.42 23.6R 98KY61 309 C~1PqX 2015 04 09.406968 21 44 16.880 -14 19 27.95 23.8R 98KY61 309 C~1PqX 2017 08 22.093582 21 50 26.69 -13 55 05.8 98KY61 W84 C~3i8o 2017 08 22.094774 21 50 26.69 -13 55 06.0 98KY61 W84 C~3i8o 2023 09 06.145850 22 16 21.716 -11 49 07.31 23.3G 98KY61 G37 C~7AL5 2023 09 06.190860 22 16 21.520 -11 49 08.57 98KY61 G37 C~7AL5
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 0.08 0.00 0.36
2 0.0000 0.00 -0.07 0.00 -0.00
3 0.0000 0.00 0.08 0.00 0.14
4 0.0001 0.00 0.07 0.00 0.07
5 0.0001 0.00 0.08 0.00 0.21
6 0.0001 0.00 0.08 0.00 0.15
7 0.0001 0.00 0.08 0.00 0.18
8 0.0001 0.00 0.07 0.00 0.02
9 0.0002 0.00 0.22 0.00 0.15
10 0.0002 0.00 0.06 0.00 0.09
11 0.0002 0.00 0.06 0.00 0.12
12 0.0002 0.00 0.20 0.00 0.09
13 0.0002 0.00 0.19 0.00 0.03
14 0.0003 0.00 0.19 0.00 0.16
15 0.0003 0.00 0.18 0.00 0.10
16 0.0246 0.00 -0.13 0.00 -0.12
17 0.0247 0.00 0.09 0.00 0.03
18 0.0247 0.00 0.00 0.00 -0.11
19 0.0247 0.00 -0.08 0.00 -0.06
20 0.0247 0.00 -0.01 0.00 -0.11
21 0.0247 0.00 0.06 0.00 -0.06
22 0.0248 0.00 0.13 0.00 -0.10
23 0.0248 0.00 0.05 0.00 -0.25
24 0.0248 0.00 -0.03 0.00 -0.20
25 0.0248 0.00 -0.12 0.00 -0.15
26 0.0248 0.00 0.10 0.00 -0.20
27 0.0248 0.00 0.02 0.00 -0.04
28 0.0273 0.00 0.01 0.00 -0.04
29 0.0273 0.00 0.09 0.00 0.01
30 0.0274 0.00 0.16 0.00 -0.03
31 0.0274 0.00 0.09 0.00 0.02
32 0.0274 0.00 0.02 0.00 -0.02
33 0.0274 0.00 0.09 0.00 0.03
34 0.0274 0.00 0.02 0.00 -0.01
35 0.0275 0.00 -0.20 0.00 0.04
36 0.0275 0.00 -0.12 0.00 -0.01
37 0.0275 0.00 -0.35 0.00 -0.05
38 0.0275 0.00 -0.12 0.00 -0.20
39 0.0275 0.00 -0.19 0.00 -0.04
40 0.1126 0.00 0.15 0.00 -0.15
41 0.1127 0.00 0.01 0.00 -0.06
42 0.1153 0.00 0.22 0.00 -0.12
43 2.1924 0.00 -0.29 0.00 -0.02
44 2.1927 0.00 -0.13 0.00 0.19
45 3.1024 0.00 -0.75 0.00 -0.19
46 3.1025 0.00 -0.81 0.00 0.26
47 3.1050 0.00 -0.54 0.00 0.31
48 7.0694 0.00 0.08 0.00 -0.42
49 7.0694 0.00 0.12 0.00 -0.41
50 7.0694 0.00 0.06 0.00 -0.48
51 15.3807 0.00 ( 8.18) 0.00 ( -6.06)
52 15.3835 0.00 0.01 0.00 0.20
53 15.3837 0.00 0.10 0.00 0.78
54 16.8872 0.00 0.18 0.00 0.25
55 16.8872 0.00 0.10 0.00 0.02
56 16.8873 0.00 0.31 0.00 0.31
57 19.2574 0.00 -0.00 0.00 -0.02
58 19.2574 0.00 0.07 0.00 -0.20
59 25.2972 0.00 -0.08 0.00 -0.14
60 25.2974 0.00 -0.19 0.00 -0.35
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.
98KY61 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.385 44.385 44.385 ecceobj 0.046 0.046 0.046 incobj 2.053 2.053 2.053 qmin 41.243 41.243 41.243 qmax 47.708 47.708 47.708 amean 44.392 44.392 44.392 amin 44.042 44.042 44.042 amax 44.755 44.755 44.754 emean 0.051 0.051 0.051 emin 0.036 0.036 0.036 emax 0.067 0.066 0.067 imean 1.136 1.136 1.136 imin 0.513 0.513 0.513 imax 1.714 1.714 1.714 excite_mean 0.055 0.055 0.055 fracstop 1.000 1.000 1.000 cjmean 3.103 3.103 3.103 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 198.0 198.0 198.0 kozaiamp 179.9 179.9 179.9