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: 98HL151 # Created Sun Dec 22 02:07:57 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 25 observations of 25 # Arc: 15.03y # First observation: 1998/04/29 # Last observation: 2013/05/08 # Chi-squared of fit: 43.83 DOF: 44 RMS: 0.23 # Min/Max residuals: -0.52 0.55 # Exact a, adot, b, bdot, g, gdot: 1.490419E-05 2.484775E-02 -6.104481E-06 -1.320823E-02 2.685728E-02 1.568720E-03 # Covariance matrix: 1.2854E-13 -5.0151E-14 -2.3630E-14 2.2454E-14 -2.6763E-14 -1.0735E-13 -5.0151E-14 4.2631E-14 2.2494E-14 -2.1387E-14 3.3417E-14 1.0221E-13 -2.3630E-14 2.2494E-14 9.7108E-14 -2.0183E-14 1.3074E-14 5.7538E-14 2.2454E-14 -2.1387E-14 -2.0183E-14 1.3966E-14 -1.3409E-14 -5.4670E-14 -2.6763E-14 3.3417E-14 1.3074E-14 -1.3409E-14 7.0993E-13 6.0637E-14 -1.0735E-13 1.0221E-13 5.7538E-14 -5.4670E-14 6.0637E-14 2.6139E-13 # lat0 lon0 xBary yBary zBary JD0 -0.262947 -163.749941 -0.380987 -0.004519 -0.937479 2450932.761241 # Heliocentric elements and errors Epoch: 2450932.5000 = 1998/04/29 Mean Anomaly: 43.09142 +/- 0.040 Argument of Peri: 130.11184 +/- 0.047 Long of Asc Node: 16.34858 +/- 0.000 Inclination: 28.08401 +/- 0.000 Eccentricity: 0.08662566 +/- 0.0001 Semi-Major Axis: 40.57647647 +/- 0.0054 Time of Perihelion: 2439631.9843 +/- 10.6 Perihelion: 37.06151222 +/- 0.0057 Aphelion: 44.09144072 +/- 0.0065 Period (y) 258.4757 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -36.53097880 +/- 0.0011 Ecliptic Y -11.05019973 +/- 0.0003 Ecliptic Z -0.17109678 +/- 0.0000 Ecliptic XDOT 0.00056315 +/- 0.0000 Ecliptic YDOT -0.00246609 +/- 0.0000 Ecliptic ZDOT -0.00134726 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 38.16602729 +/- 0.0011 Geocenter to KBO 37.23384711 +/- 0.0012 # Hcoef: 8.05
The following table shows the complete astrometric record for 98HL151. 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 (98HL151) followed by the observatory code and reference code for the source of the astrometry.
1998 04 29.26051 12 59 28.83 -06 38 00.9 23.5R 98HL151 568 Ca4825 1998 04 29.32553 12 59 28.52 -06 37 59.5 23.5R 98HL151 568 Ca4825 1998 04 29.38753 12 59 28.23 -06 37 57.8 23.5R 98HL151 568 Ca4825 1998 05 02.30459 12 59 14.51 -06 36 55.6 23.8R 98HL151 568 Ca4825 1998 05 02.31623 12 59 14.43 -06 36 55.5 23.8R 98HL151 568 Ca4825 1998 05 02.32787 12 59 14.41 -06 36 55.3 23.8R 98HL151 568 Ca4825 1998 05 22.35851 12 57 52.51 -06 31 01.8 23.8R 98HL151 568 Ca4825 1998 05 22.37794 12 57 52.41 -06 31 01.7 23.8R 98HL151 568 Ca4825 1998 05 22.38956 12 57 52.39 -06 31 01.6 23.8R 98HL151 568 Ca4825 1999 03 16.61148 13 07 19.03 -08 09 25.9 23.1R 98HL151 568 Ca4825 1999 03 16.64553 13 07 18.85 -08 09 25.5 23.1R 98HL151 568 Ca4825 1999 04 08.50980 13 05 22.36 -08 00 43.9 23.2R 98HL151 568 Ca4825 1999 04 08.53343 13 05 22.24 -08 00 43.4 23.2R 98HL151 568 Ca4825 2001 04 27.37696 13 11 58.40 -10 20 47.6 23.3R 98HL151 568 Cd0712 2001 04 27.38514 13 11 58.37 -10 20 47.7 98HL151 568 Cd0712 2001 04 27.42412 13 11 58.17 -10 20 46.8 98HL151 568 Cd0712 2001 04 27.43230 13 11 58.12 -10 20 46.4 98HL151 568 Cd0712 2001 05 19.32581 13 10 19.74 -10 13 01.7 23.8R 98HL151 568 Ce6434 2001 05 20.33127 13 10 15.85 -10 12 43.3 98HL151 568 Ce6434 2001 05 20.33944 13 10 15.82 -10 12 43.1 98HL151 568 Ce6434 2001 05 20.40120 13 10 15.59 -10 12 42.1 98HL151 568 Ce6434 2001 05 20.40936 13 10 15.56 -10 12 41.9 98HL151 568 Ce6434 2013 05 08.04857 14 03 04.446 -24 17 24.59 23.8r 98HL151 807 C~2Y3p 2013 05 08.13283 14 03 03.938 -24 17 22.67 98HL151 807 C~2Y3p 2013 05 08.22009 14 03 03.492 -24 17 20.25 98HL151 807 C~2Y3p
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 -0.19 0.00 -0.30
2 0.0002 0.00 -0.10 0.00 -0.30
3 0.0003 0.00 0.07 0.00 0.05
4 0.0083 0.00 0.03 0.00 0.09
5 0.0084 0.00 -0.35 0.00 -0.06
6 0.0084 0.00 0.18 0.00 -0.10
7 0.0632 0.00 0.07 0.00 0.11
8 0.0633 0.00 -0.40 0.00 -0.06
9 0.0633 0.00 -0.08 0.00 -0.12
10 0.8798 0.00 -0.06 0.00 -0.07
11 0.8799 0.00 -0.29 0.00 -0.37
12 0.9425 0.00 -0.27 0.00 -0.10
13 0.9426 0.00 -0.19 0.00 -0.17
14 2.9955 0.00 0.37 0.00 0.35
15 2.9956 0.00 0.55 0.00 0.06
16 2.9957 0.00 0.51 0.00 0.05
17 2.9957 0.00 0.38 0.00 0.26
18 3.0556 0.00 0.07 0.00 0.12
19 3.0584 0.00 -0.06 0.00 0.20
20 3.0584 0.00 -0.03 0.00 0.25
21 3.0586 0.00 0.14 0.00 0.13
22 3.0586 0.00 0.17 0.00 0.18
23 15.0247 0.00 0.21 0.00 -0.21
24 15.0250 0.00 -0.52 0.00 -0.25
25 15.0252 0.00 -0.06 0.00 0.12
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.
98HL151 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 40.559 40.559 40.559 ecceobj 0.088 0.088 0.088 incobj 28.088 28.088 28.088 qmin 36.391 36.399 36.392 qmax 45.466 45.504 45.464 amean 40.815 40.815 40.815 amin 40.493 40.498 40.500 amax 41.145 41.161 41.146 emean 0.091 0.091 0.091 emin 0.078 0.078 0.078 emax 0.105 0.106 0.105 imean 27.797 27.797 27.798 imin 27.401 27.393 27.394 imax 28.203 28.203 28.203 excite_mean 0.475 0.475 0.475 fracstop 1.000 1.000 1.000 cjmean 2.789 2.789 2.789 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 185.7 185.6 185.3 kozaiamp 180.0 180.0 180.0