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: 97GA45
# Created Wed Dec 25 02:07:52 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 38 observations of 38
# Arc: 20.22y
# First observation: 1997/04/03
# Last observation: 2017/06/24
# Chi-squared of fit: 127.39 DOF: 70 RMS: 0.32
# Min/Max residuals: -1.27 1.28
# Exact a, adot, b, bdot, g, gdot:
1.473914E-05 2.705318E-02 3.661737E-06 3.684042E-03 2.564451E-02 2.143767E-03
# Covariance matrix:
5.6773E-13 -1.2941E-13 3.2834E-14 -1.5237E-14 -7.8206E-14 -1.8911E-13
-1.2941E-13 5.2898E-14 -1.5236E-14 7.0744E-15 3.3133E-14 8.7866E-14
3.2834E-14 -1.5236E-14 3.3108E-13 -1.9851E-14 -9.7851E-15 -2.5839E-14
-1.5237E-14 7.0744E-15 -1.9851E-14 2.0567E-15 4.4385E-15 1.2001E-14
-7.8206E-14 3.3133E-14 -9.7851E-15 4.4385E-15 1.0289E-13 5.3421E-14
-1.8911E-13 8.7866E-14 -2.5839E-14 1.2001E-14 5.3421E-14 1.4912E-13
# lat0 lon0 xBary yBary zBary JD0
0.049488 177.023162 -0.280067 0.000678 -0.965436 2450541.781520
# Heliocentric elements and errors
Epoch: 2450542.5000 = 1997/04/04
Mean Anomaly: 24.33982 +/- 0.005
Argument of Peri: 326.11729 +/- 0.008
Long of Asc Node: 177.07775 +/- 0.000
Inclination: 7.77338 +/- 0.000
Eccentricity: 0.17030347 +/- 0.0000
Semi-Major Axis: 46.94055798 +/- 0.0026
Time of Perihelion: 2442600.3928 +/- 1.9
Perihelion: 38.94641787 +/- 0.0027
Aphelion: 54.93469810 +/- 0.0035
Period (y) 321.6108 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -39.91404954 +/- 0.0005
Ecliptic Y 1.78942463 +/- 0.0000
Ecliptic Z 0.03382039 +/- 0.0000
Ecliptic XDOT -0.00037257 +/- 0.0000
Ecliptic YDOT -0.00286620 +/- 0.0000
Ecliptic ZDOT 0.00039335 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.95410060 +/- 0.0005
Geocenter to KBO 38.99468867 +/- 0.0005
# Hcoef: 8.65
The following table shows the complete astrometric record for 97GA45. 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 (97GA45) followed by the observatory code and reference code for the source of the astrometry.
1997 04 03.28080 11 49 09.14 +01 13 44.7 23.7R 97GA45 568 Ca0663 1997 04 03.43969 11 49 08.50 +01 13 48.9 97GA45 568 Ca0663 1997 04 07.94042 11 48 48.97 +01 16 06.3 97GA45 950 Ca0663 1997 04 08.00322 11 48 48.73 +01 16 08.2 97GA45 950 Ca0663 2001 03 27.35949 12 13 29.47 -00 30 05.2 24.6R 97GA45 695 Cd7682 2001 03 27.38158 12 13 29.37 -00 30 04.8 24.9R 97GA45 695 Cd7682 2001 03 28.30316 12 13 25.19 -00 29 35.3 24.8R 97GA45 695 Cd7682 2001 03 28.37128 12 13 24.88 -00 29 33.3 24.7R 97GA45 695 Cd7682 2015 02 17.58854 13 35 15.902 -06 11 27.47 24.8r 97GA45 568 C~2nbH 2015 02 17.62949 13 35 15.823 -06 11 26.79 24.9r 97GA45 568 C~2nbH 2015 02 20.62266 13 35 09.551 -06 10 30.80 24.9r 97GA45 568 C~2nbH 2015 03 18.56698 13 33 49.280 -06 00 20.21 24.4r 97GA45 568 C~2nbH 2015 03 18.60819 13 33 49.108 -06 00 18.96 24.9r 97GA45 568 C~2nbH 2015 03 18.61429 13 33 49.090 -06 00 18.99 25.0r 97GA45 568 C~2nbH 2015 03 20.57112 13 33 41.501 -05 59 26.15 24.9r 97GA45 568 C~2nbH 2015 04 13.36971 13 31 59.918 -05 48 15.86 24.7r 97GA45 568 C~2nbH 2015 04 13.41068 13 31 59.733 -05 48 14.14 24.6r 97GA45 568 C~2nbH 2015 04 13.51324 13 31 59.286 -05 48 11.49 24.7r 97GA45 568 C~2nbH 2015 04 19.41044 13 31 32.970 -05 45 26.65 24.2r 97GA45 568 C~2nbH 2015 05 18.33311 13 29 33.639 -05 33 43.23 24.9r 97GA45 568 C~2nbH 2015 06 22.32783 13 28 06.640 -05 26 33.44 24.9r 97GA45 568 C~2nbH 2015 07 20.27306 13 28 06.287 -05 28 11.58 24.7r 97GA45 568 C~2nbH 2016 02 04.57962 13 40 57.716 -06 35 23.30 25.0w 97GA45 568 C~2nbH 2016 02 10.56746 13 40 51.843 -06 34 06.82 25.3w 97GA45 568 C~2nbH 2016 04 03.44935 13 38 08.727 -06 13 43.13 24.8w 97GA45 568 C~2nbH 2016 04 09.43049 13 37 42.505 -06 10 54.70 24.7w 97GA45 568 C~2nbH 2016 05 02.31529 13 36 01.773 -06 00 41.01 25.5w 97GA45 568 C~2nbH 2016 05 06.32506 13 35 44.998 -05 59 03.52 24.7w 97GA45 568 C~2nbH 2016 05 28.29220 13 34 24.875 -05 51 43.94 25.4w 97GA45 568 C~2nbH 2016 05 28.30434 13 34 24.832 -05 51 43.77 25.2w 97GA45 568 C~2nbH 2016 05 29.31127 13 34 21.777 -05 51 27.95 25.1w 97GA45 568 C~2nbH 2016 06 04.36963 13 34 04.699 -05 50 03.05 24.9w 97GA45 568 C~2nbH 2016 06 27.28486 13 33 24.397 -05 47 21.36 24.7w 97GA45 568 C~2nbH 2016 07 07.28742 13 33 20.121 -05 47 34.84 25.5w 97GA45 568 C~2nbH 2017 02 27.63752 13 45 40.652 -06 49 15.53 97GA45 568 C~2nbH 2017 02 27.65749 13 45 40.606 -06 49 14.89 97GA45 568 C~2nbH 2017 03 28.58374 13 44 01.076 -06 37 18.64 25.4w 97GA45 568 C~2nbH 2017 06 24.29923 13 38 49.723 -06 08 11.80 25.3w 97GA45 568 C~2nbH
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 0.25 0.00 -0.42
2 0.0004 0.00 1.28 0.00 -1.09
3 0.0128 0.00 -1.27 0.00 0.52
4 0.0129 0.00 -0.81 0.00 0.56
5 3.9811 0.00 0.10 0.00 0.25
6 3.9811 0.00 0.14 0.00 -0.05
7 3.9836 0.00 0.30 0.00 0.24
8 3.9838 0.00 0.38 0.00 0.08
9 17.8763 0.00 -0.31 0.00 0.01
10 17.8764 0.00 -0.23 0.00 -0.05
11 17.8846 0.00 -0.20 0.00 0.16
12 17.9556 0.00 -0.09 0.00 0.09
13 17.9557 0.00 -0.25 0.00 0.23
14 17.9557 0.00 -0.17 0.00 0.04
15 17.9611 0.00 -0.12 0.00 -0.09
16 18.0263 0.00 -0.23 0.00 -0.50
17 18.0264 0.00 -0.21 0.00 0.07
18 18.0266 0.00 0.08 0.00 -0.18
19 18.0428 0.00 -0.05 0.00 0.09
20 18.1220 0.00 -0.30 0.00 -0.09
21 18.2178 0.00 -0.03 0.00 0.10
22 18.2943 0.00 -0.07 0.00 0.11
23 18.8400 0.00 -0.05 0.00 0.14
24 18.8564 0.00 0.01 0.00 -0.00
25 19.0011 0.00 0.02 0.00 -0.03
26 19.0175 0.00 0.10 0.00 0.02
27 19.0802 0.00 0.15 0.00 -0.31
28 19.0912 0.00 0.11 0.00 -0.06
29 19.1513 0.00 0.10 0.00 0.01
30 19.1513 0.00 0.03 0.00 -0.01
31 19.1541 0.00 0.16 0.00 0.13
32 19.1707 0.00 -0.01 0.00 0.14
33 19.2334 0.00 0.14 0.00 0.19
34 19.2608 0.00 0.06 0.00 -0.12
35 19.9052 0.00 0.17 0.00 -0.15
36 19.9052 0.00 0.27 0.00 0.07
37 19.9844 0.00 0.31 0.00 -0.15
38 20.2246 0.00 0.10 0.00 0.13
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.
97GA45 quality flag:2 Type: CLASSICAL SCATNEAR SCATNEAR axisobj 46.939 46.939 46.939 ecceobj 0.172 0.172 0.172 incobj 7.780 7.780 7.780 qmin 38.047 38.041 38.055 qmax 56.919 56.954 57.105 amean 47.271 47.270 47.270 amin 46.842 46.841 46.846 amax 47.781 47.800 47.824 emean 0.175 0.175 0.175 emin 0.160 0.159 0.159 emax 0.192 0.193 0.195 imean 7.601 7.602 7.601 imin 6.958 6.960 6.960 imax 8.234 8.235 8.235 excite_mean 0.220 0.220 0.220 fracstop 1.000 1.000 1.000 cjmean 3.082 3.082 3.082 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 176.8 176.8 176.9 kozaiamp 180.0 180.0 180.0