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: 98HN151 # Created Sun Dec 22 02:07:57 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 31 observations of 31 # Arc: 18.95y # First observation: 1998/04/21 # Last observation: 2017/04/01 # Chi-squared of fit: 66.12 DOF: 56 RMS: 0.26 # Min/Max residuals: -0.55 0.61 # Exact a, adot, b, bdot, g, gdot: 1.367071E-05 2.336157E-02 -5.437811E-06 -8.516133E-03 2.563364E-02 -7.193429E-04 # Covariance matrix: 1.1136E-13 -2.6387E-14 -1.1171E-14 7.6793E-15 -2.4514E-14 -4.4526E-14 -2.6387E-14 1.9313E-14 8.1168E-15 -6.5746E-15 -1.2500E-14 3.8798E-14 -1.1171E-14 8.1168E-15 8.3234E-14 -8.2841E-15 3.6417E-15 1.7123E-14 7.6793E-15 -6.5746E-15 -8.2841E-15 3.1667E-15 3.5077E-15 -1.3806E-14 -2.4514E-14 -1.2500E-14 3.6417E-15 3.5077E-15 1.9109E-13 -2.4426E-14 -4.4526E-14 3.8798E-14 1.7123E-14 -1.3806E-14 -2.4426E-14 8.1434E-14 # lat0 lon0 xBary yBary zBary JD0 15.310426 -178.472084 -0.491739 0.232946 -0.851707 2450924.792541 # Heliocentric elements and errors Epoch: 2450924.5000 = 1998/04/21 Mean Anomaly: 197.29295 +/- 0.022 Argument of Peri: 306.86714 +/- 0.014 Long of Asc Node: 37.23802 +/- 0.000 Inclination: 25.01895 +/- 0.000 Eccentricity: 0.05734125 +/- 0.0001 Semi-Major Axis: 37.78020257 +/- 0.0025 Time of Perihelion: 2489259.7871 +/- 6.9 Perihelion: 35.61383842 +/- 0.0030 Aphelion: 39.94656671 +/- 0.0032 Period (y) 232.2227 +/- 0.02 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -38.47469810 +/- 0.0006 Ecliptic Y -1.52151599 +/- 0.0000 Ecliptic Z 10.30066238 +/- 0.0002 Ecliptic XDOT -0.00009745 +/- 0.0000 Ecliptic YDOT -0.00249003 +/- 0.0000 Ecliptic ZDOT -0.00089768 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.85877341 +/- 0.0006 Geocenter to KBO 39.01130182 +/- 0.0007 # Hcoef: 8.25
The following table shows the complete astrometric record for 98HN151. 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 (98HN151) followed by the observatory code and reference code for the source of the astrometry.
1998 04 21.29181 12 30 23.73 +13 24 59.8 24.5R 98HN151 568 Ca4825 1998 04 21.34742 12 30 23.47 +13 25 00.4 24.5R 98HN151 568 Ca4825 1998 04 21.38851 12 30 23.28 +13 25 01.2 24.5R 98HN151 568 Ca4825 1998 05 01.38939 12 29 39.48 +13 26 30.9 24.5R 98HN151 568 Ca4825 1998 05 01.40115 12 29 39.42 +13 26 30.7 24.5R 98HN151 568 Ca4825 1998 05 01.41292 12 29 39.36 +13 26 30.9 24.5R 98HN151 568 Ca4825 1998 05 23.25272 12 28 24.46 +13 25 42.3 24.5R 98HN151 568 Ca4825 1998 05 23.26531 12 28 24.41 +13 25 41.9 24.5R 98HN151 568 Ca4825 1998 05 23.27895 12 28 24.35 +13 25 41.7 24.5R 98HN151 568 Ca4825 1998 07 01.26692 12 27 47.38 +13 10 44.4 24.5R 98HN151 568 Ca4825 1998 07 01.34797 12 27 47.47 +13 10 41.8 24.5R 98HN151 568 Ca4825 1999 01 22.48182 12 40 33.04 +11 43 56.4 24.5R 98HN151 568 Ca4825 1999 01 24.55395 12 40 30.02 +11 44 51.0 24.5R 98HN151 568 Ca4825 2001 02 24.32820 12 47 13.63 +10 00 33.5 98HN151 309 Cc7385 2001 02 24.37884 12 47 13.43 +10 00 35.1 98HN151 309 Cc7385 2001 03 24.38472 12 45 06.82 +10 14 59.1 23.0R 98HN151 695 Cc7385 2001 03 24.46797 12 45 06.41 +10 15 01.4 98HN151 695 Cc7385 2002 03 12.319099 12 50 12.43 +09 08 04.5 23.3V 98HN151 645 C~1cF1 2002 03 12.319928 12 50 12.43 +09 08 04.5 23.1V 98HN151 645 C~1cF1 2002 03 12.322416 12 50 12.42 +09 08 04.6 23.8V 98HN151 645 C~1cF1 2003 04 01.286598 12 52 42.78 +08 16 24.0 23.2V 98HN151 645 C~1cF1 2003 04 01.287428 12 52 42.78 +08 16 24.0 23.0V 98HN151 645 C~1cF1 2003 04 01.289915 12 52 42.77 +08 16 24.1 23.9V 98HN151 645 C~1cF1 2013 05 14.22152 13 29 48.46 -01 48 04.7 23.8R 98HN151 G37 C~0snV 2013 05 14.28417 13 29 48.16 -01 48 04.2 98HN151 G37 C~0snV 2015 03 23.39738 13 42 10.80 -04 11 40.2 23.6R 98HN151 695 C~1Q39 2015 03 23.45985 13 42 10.54 -04 11 38.8 98HN151 695 C~1Q39 2016 04 09.209896 13 44 54.02 -05 07 18.6 98HN151 W84 C~3i8o 2016 04 09.211140 13 44 54.02 -05 07 18.5 98HN151 W84 C~3i8o 2017 04 01.340619 13 49 42.84 -06 13 08.6 98HN151 W84 C~3i8o 2017 04 01.342344 13 49 42.83 -06 13 08.5 98HN151 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 0.16 0.00 -0.03
2 0.0002 0.00 0.17 0.00 -0.12
3 0.0003 0.00 0.22 0.00 0.18
4 0.0276 0.00 0.14 0.00 0.61
5 0.0277 0.00 -0.02 0.00 0.35
6 0.0277 0.00 -0.18 0.00 0.49
7 0.0875 0.00 0.10 0.00 0.11
8 0.0875 0.00 -0.13 0.00 -0.17
9 0.0876 0.00 -0.47 0.00 -0.23
10 0.1943 0.00 0.10 0.00 -0.44
11 0.1945 0.00 0.51 0.00 -0.20
12 0.7562 0.00 0.08 0.00 -0.02
13 0.7618 0.00 0.04 0.00 -0.47
14 2.8475 0.00 -0.12 0.00 0.19
15 2.8476 0.00 -0.12 0.00 0.17
16 2.9243 0.00 -0.37 0.00 0.27
17 2.9245 0.00 -0.24 0.00 0.25
18 3.8906 0.00 -0.12 0.00 -0.35
19 3.8906 0.00 -0.06 0.00 -0.38
20 3.8906 0.00 -0.04 0.00 -0.36
21 4.9445 0.00 0.09 0.00 -0.06
22 4.9445 0.00 0.15 0.00 -0.08
23 4.9446 0.00 0.19 0.00 -0.04
24 15.0635 0.00 0.28 0.00 0.51
25 15.0636 0.00 -0.11 0.00 0.19
26 16.9202 0.00 -0.29 0.00 0.19
27 16.9204 0.00 0.10 0.00 0.09
28 17.9683 0.00 0.03 0.00 -0.55
29 17.9683 0.00 0.13 0.00 -0.48
30 18.9461 0.00 -0.04 0.00 0.14
31 18.9461 0.00 -0.06 0.00 0.20
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.
98HN151 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 37.812 37.812 37.812 ecceobj 0.056 0.056 0.056 incobj 25.041 25.041 25.041 qmin 35.257 35.301 35.316 qmax 40.869 40.862 40.884 amean 37.983 37.988 38.002 amin 37.690 37.690 37.721 amax 38.283 38.300 38.306 emean 0.052 0.051 0.051 emin 0.038 0.037 0.038 emax 0.068 0.067 0.068 imean 23.595 23.594 23.605 imin 22.782 22.781 22.813 imax 24.568 24.568 24.568 excite_mean 0.404 0.404 0.404 fracstop 1.000 1.000 1.000 cjmean 2.850 2.850 2.850 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 176.3 176.2 175.7 kozaiamp 179.9 180.0 180.0