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: 98FS144 # Created Sun Nov 24 02:07:52 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 22 observations of 22 # Arc: 24.09y # First observation: 1998/03/23 # Last observation: 2022/04/26 # Chi-squared of fit: 174.54 DOF: 38 RMS: 0.50 # Min/Max residuals: -1.09 1.06 # Exact a, adot, b, bdot, g, gdot: 1.464055E-05 2.368387E-02 -6.501912E-07 1.920776E-03 2.446536E-02 3.577854E-04 # Covariance matrix: 1.6132E-13 -2.8039E-14 6.2249E-15 -1.6917E-15 -8.8584E-14 -3.2536E-14 -2.8039E-14 2.0433E-14 -1.9131E-15 1.6274E-15 -1.6548E-15 3.3408E-14 6.2249E-15 -1.9131E-15 9.2868E-14 -5.3516E-15 -8.3697E-15 -2.6569E-15 -1.6917E-15 1.6274E-15 -5.3516E-15 1.1251E-15 -6.0751E-16 2.8306E-15 -8.8584E-14 -1.6548E-15 -8.3697E-15 -6.0751E-16 1.9426E-13 -1.7171E-14 -3.2536E-14 3.3408E-14 -2.6569E-15 2.8306E-15 -1.7171E-14 5.8453E-14 # lat0 lon0 xBary yBary zBary JD0 -8.896235 167.021506 -0.260458 -0.150230 -0.958641 2450895.541701 # Heliocentric elements and errors Epoch: 2450896.5000 = 1998/03/24 Mean Anomaly: 106.74539 +/- 0.144 Argument of Peri: 188.99177 +/- 0.136 Long of Asc Node: 228.83217 +/- 0.000 Inclination: 9.87366 +/- 0.000 Eccentricity: 0.02261909 +/- 0.0000 Semi-Major Axis: 41.53545590 +/- 0.0030 Time of Perihelion: 2421904.8103 +/- 39.1 Perihelion: 40.59596157 +/- 0.0030 Aphelion: 42.47495022 +/- 0.0031 Period (y) 267.6928 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -40.34682105 +/- 0.0007 Ecliptic Y 9.02998460 +/- 0.0002 Ecliptic Z -6.32105705 +/- 0.0001 Ecliptic XDOT -0.00066386 +/- 0.0000 Ecliptic YDOT -0.00255781 +/- 0.0000 Ecliptic ZDOT 0.00020608 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.82536587 +/- 0.0007 Geocenter to KBO 40.87414372 +/- 0.0007 # Hcoef: 6.73
The following table shows the complete astrometric record for 98FS144. 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 (98FS144) followed by the observatory code and reference code for the source of the astrometry.
1998 03 23.04097 10 58 25.22 -03 04 26.1 98FS144 807 Ca3016 1998 03 23.06742 10 58 25.07 -03 04 25.2 22.6R 98FS144 807 Ca3016 1998 03 23.16044 10 58 24.68 -03 04 21.6 22.7R 98FS144 807 Ca3016 1998 03 24.07084 10 58 20.79 -03 03 53.7 22.7R 98FS144 807 Ca3016 1998 03 27.05289 10 58 08.43 -03 02 19.0 98FS144 807 Ca3016 1998 03 27.16120 10 58 07.98 -03 02 15.7 22.4R 98FS144 807 Ca3016 1998 12 13.28766 11 08 40.99 -03 51 32.2 98FS144 950 Ca3335 1998 12 15.23928 11 08 41.47 -03 51 59.9 98FS144 950 Ca3335 1998 12 16.25293 11 08 41.57 -03 52 13.8 98FS144 950 Ca3335 1999 01 22.46403 11 07 43.52 -03 53 15.4 22.2R 98FS144 568 Ca5537 1999 01 22.51817 11 07 43.32 -03 53 14.4 98FS144 568 Ca5537 2000 01 06.61373 11 13 28.79 -04 19 21.6 22.7R 98FS144 568 Ca8410 2000 01 06.64435 11 13 28.72 -04 19 21.7 22.6R 98FS144 568 Ca8410 2000 01 06.66171 11 13 28.70 -04 19 21.7 22.7R 98FS144 568 Ca8410 2001 02 17.09584 11 16 25.33 -04 35 58.8 98FS144 950 Cc6359 2001 02 17.14333 11 16 25.13 -04 35 57.7 98FS144 950 Cc6359 2001 05 21.28509 11 11 07.47 -03 52 34.3 98FS144 568 Cd2198 2001 05 21.31799 11 11 07.44 -03 52 33.7 98FS144 568 Cd2198 2013 03 12.28751 12 17 05.61 -09 12 19.8 22.9R 98FS144 G37 C~0qSP 2013 03 12.42284 12 17 05.01 -09 12 16.2 98FS144 G37 C~0qSP 2022 04 26.244770 13 01 05.511 -11 59 38.46 23.0G 98FS144 G37 C~5ZUo 2022 04 26.311000 13 01 05.237 -11 59 36.63 98FS144 G37 C~5ZUo
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 0.28 0.00 0.31
2 0.0001 0.00 -0.26 0.00 0.37
3 0.0003 0.00 -0.06 0.00 1.03
4 0.0028 0.00 -0.56 0.00 0.08
5 0.0110 0.00 0.92 0.00 0.12
6 0.0113 0.00 0.99 0.00 -0.02
7 0.7262 0.00 0.14 0.00 -0.05
8 0.7315 0.00 0.12 0.00 0.26
9 0.7343 0.00 -0.00 0.00 0.02
10 0.8362 0.00 1.06 0.00 -0.44
11 0.8364 0.00 0.59 0.00 0.03
12 1.7921 0.00 -0.86 0.00 -0.55
13 1.7922 0.00 -1.09 0.00 -0.63
14 1.7923 0.00 -0.93 0.00 -0.62
15 2.9077 0.00 0.26 0.00 0.06
16 2.9079 0.00 0.31 0.00 0.08
17 3.1629 0.00 -0.62 0.00 -0.10
18 3.1630 0.00 -0.69 0.00 -0.10
19 14.9712 0.00 0.36 0.00 -0.05
20 14.9716 0.00 0.37 0.00 -0.08
21 24.0936 0.00 -0.19 0.00 0.21
22 24.0938 0.00 -0.02 0.00 0.03
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.
98FS144 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 41.625 41.625 41.625 ecceobj 0.025 0.025 0.025 incobj 9.885 9.885 9.885 qmin 39.746 39.737 39.762 qmax 44.051 44.052 44.073 amean 41.832 41.832 41.832 amin 41.521 41.522 41.521 amax 42.157 42.157 42.154 emean 0.030 0.030 0.030 emin 0.014 0.014 0.014 emax 0.046 0.046 0.046 imean 11.597 11.597 11.597 imin 10.631 10.630 10.631 imax 12.381 12.382 12.381 excite_mean 0.203 0.203 0.203 fracstop 1.000 1.000 1.000 cjmean 3.027 3.027 3.027 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 186.2 186.2 186.1 kozaiamp 180.0 179.9 179.9