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: 98HO151 # Created Fri Nov 22 02:07:55 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 19 observations of 19 # Arc: 18.94y # First observation: 1998/04/22 # Last observation: 2017/03/30 # Chi-squared of fit: 59.33 DOF: 32 RMS: 0.31 # Min/Max residuals: -0.67 0.66 # Exact a, adot, b, bdot, g, gdot: 1.360571E-05 1.997235E-02 2.629181E-06 3.041082E-03 2.261689E-02 -7.096854E-04 # Covariance matrix: 1.3257E-13 -3.5294E-14 4.3865E-15 -4.1842E-15 5.9887E-14 -6.6224E-14 -3.5294E-14 4.0315E-14 -5.2442E-15 5.8184E-15 -4.8703E-14 9.4132E-14 4.3865E-15 -5.2442E-15 1.1259E-13 -7.8110E-15 2.6850E-14 -1.1034E-14 -4.1842E-15 5.8184E-15 -7.8110E-15 2.2073E-15 -6.1865E-15 1.4139E-14 5.9887E-14 -4.8703E-14 2.6850E-14 -6.1865E-15 9.1157E-13 -4.9248E-14 -6.6224E-14 9.4132E-14 -1.1034E-14 1.4139E-14 -4.9248E-14 2.3283E-13 # lat0 lon0 xBary yBary zBary JD0 14.759602 -178.031502 -0.500003 0.223612 -0.849603 2450925.794391 # Heliocentric elements and errors Epoch: 2450926.5000 = 1998/04/23 Mean Anomaly: 196.73661 +/- 0.043 Argument of Peri: 226.30033 +/- 0.020 Long of Asc Node: 123.56613 +/- 0.000 Inclination: 16.75225 +/- 0.000 Eccentricity: 0.09780852 +/- 0.0001 Semi-Major Axis: 41.17453317 +/- 0.0062 Time of Perihelion: 2494691.5824 +/- 16.6 Perihelion: 37.14731292 +/- 0.0074 Aphelion: 45.20175342 +/- 0.0083 Period (y) 264.2112 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -43.58312505 +/- 0.0018 Ecliptic Y -2.00173340 +/- 0.0001 Ecliptic Z 11.26444373 +/- 0.0005 Ecliptic XDOT 0.00026182 +/- 0.0000 Ecliptic YDOT -0.00240152 +/- 0.0000 Ecliptic ZDOT 0.00033401 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.05979211 +/- 0.0017 Geocenter to KBO 44.21481042 +/- 0.0019 # Hcoef: 7.99
The following table shows the complete astrometric record for 98HO151. 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 (98HO151) followed by the observatory code and reference code for the source of the astrometry.
1998 04 22.29366 12 31 04.04 +12 44 24.3 24.4R 98HO151 568 Ca4825 1998 04 22.33617 12 31 03.86 +12 44 24.9 24.4R 98HO151 568 Ca4825 1998 04 22.38721 12 31 03.66 +12 44 25.9 24.4R 98HO151 568 Ca4825 1998 05 01.42749 12 30 30.24 +12 46 30.0 24.4R 98HO151 568 Ca4825 1998 05 01.43914 12 30 30.20 +12 46 30.2 24.4R 98HO151 568 Ca4825 1998 05 01.45082 12 30 30.16 +12 46 30.4 24.4R 98HO151 568 Ca4825 1998 05 22.24529 12 29 29.37 +12 48 06.7 24.4R 98HO151 568 Ca4825 1998 05 22.25692 12 29 29.31 +12 48 06.3 24.4R 98HO151 568 Ca4825 1998 05 22.30786 12 29 29.20 +12 48 06.4 24.4R 98HO151 568 Ca4825 1999 03 10.58059 12 38 37.36 +12 06 50.2 24.4R 98HO151 568 Ca4825 1999 03 10.60152 12 38 37.27 +12 06 50.9 24.4R 98HO151 568 Ca4825 1999 05 07.41074 12 34 43.69 +12 29 01.6 24.4R 98HO151 568 Ca4825 1999 05 07.46740 12 34 43.51 +12 29 02.0 24.4R 98HO151 568 Ca4825 2005 04 15.21512 13 03 27.07 +10 25 38.5 22.5R 98HO151 304 Cn3196 2005 04 15.25417 13 03 26.83 +10 25 39.9 98HO151 304 Cn3196 2015 03 16.43473 13 50 58.29 +06 33 14.6 23.5R 98HO151 G37 C~1N5b 2015 03 16.48875 13 50 58.12 +06 33 16.5 98HO151 G37 C~1N5b 2017 03 30.342008 13 59 12.14 +05 54 40.6 98HO151 W84 C~3i8o 2017 03 30.344832 13 59 12.14 +05 54 40.4 98HO151 W84 C~3i8o
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 0.03 0.00 -0.12
2 0.0001 0.00 -0.15 0.00 -0.23
3 0.0003 0.00 -0.12 0.00 -0.06
4 0.0250 0.00 0.20 0.00 -0.02
5 0.0250 0.00 0.22 0.00 0.05
6 0.0251 0.00 0.25 0.00 0.12
7 0.0820 0.00 0.41 0.00 0.23
8 0.0820 0.00 -0.08 0.00 -0.15
9 0.0822 0.00 0.07 0.00 0.05
10 0.8824 0.00 -0.21 0.00 -0.66
11 0.8824 0.00 -0.29 0.00 -0.67
12 1.0407 0.00 -0.27 0.00 0.46
13 1.0409 0.00 -0.13 0.00 0.41
14 6.9813 0.00 0.61 0.00 0.15
15 6.9814 0.00 -0.46 0.00 0.66
16 16.8984 0.00 0.17 0.00 -0.03
17 16.8985 0.00 0.47 0.00 0.08
18 18.9378 0.00 -0.40 0.00 -0.02
19 18.9379 0.00 -0.23 0.00 -0.30
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.
98HO151 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 41.185 41.185 41.185 ecceobj 0.097 0.097 0.097 incobj 16.732 16.732 16.732 qmin 36.764 36.812 36.808 qmax 46.441 46.357 46.350 amean 41.453 41.456 41.456 amin 41.124 41.126 41.129 amax 41.805 41.808 41.807 emean 0.093 0.093 0.093 emin 0.078 0.077 0.077 emax 0.111 0.110 0.110 imean 15.257 15.251 15.253 imin 14.389 14.395 14.394 imax 16.164 16.151 16.155 excite_mean 0.279 0.279 0.279 fracstop 1.000 1.000 1.000 cjmean 2.980 2.980 2.980 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 180.2 181.0 181.0 kozaiamp 179.9 179.9 180.0