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: 15FH561 # Created Mon Jul 7 01:10:32 2025 # Orbit generated from Bernstein formalism # Fitting 21 observations of 21 # Arc: 1.01y # First observation: 2014/03/25 # Last observation: 2015/03/29 Preliminary a, adot, b, bdot, g, gdot: -0.000012 0.024172 0.000001 -0.005703 0.024455 0.000000 # Chi-squared of fit: 6.51 DOF: 36 RMS: 0.10 # Min/Max residuals: -0.18 0.19 # Exact a, adot, b, bdot, g, gdot: 1.617322E-05 2.429592E-02 -4.527797E-06 -5.735701E-03 2.488915E-02 5.748247E-03 # Covariance matrix: 3.8564E-13 1.2615E-11 -2.4443E-14 -3.0462E-12 1.0675E-11 5.3862E-10 1.2615E-11 6.7542E-10 -1.1568E-12 -1.6130E-10 5.2689E-10 2.8474E-08 -2.4443E-14 -1.1568E-12 1.2581E-13 1.5191E-13 -9.9088E-13 -4.8944E-11 -3.0462E-12 -1.6130E-10 1.5191E-13 3.8829E-11 -1.2596E-10 -6.8029E-09 1.0675E-11 5.2689E-10 -9.9088E-13 -1.2596E-10 4.3586E-10 2.2266E-08 5.3862E-10 2.8474E-08 -4.8944E-11 -6.8029E-09 2.2266E-08 1.2010E-06 # lat0 lon0 xBary yBary zBary JD0 13.603344 -147.525147 0.463145 0.207475 -0.857058 2456742.080948 # Heliocentric elements and errors Epoch: 2456740.5000 = 2014/03/24 Mean Anomaly: 52.25230 +/- 2.010 Argument of Peri: 55.88992 +/- 2.226 Long of Asc Node: 76.59735 +/- 0.042 Inclination: 18.56567 +/- 0.013 Eccentricity: 0.23879311 +/- 0.0449 Semi-Major Axis: 45.71809910 +/- 1.0293 Time of Perihelion: 2440352.2113 +/- 301.7 Perihelion: 34.80093194 +/- 2.1958 Aphelion: 56.63526627 +/- 2.4153 Period (y) 309.1295 +/- 10.44 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -33.93827967 +/- 0.0276 Ecliptic Y -21.04892672 +/- 0.0176 Ecliptic Z 9.44970579 +/- 0.0079 Ecliptic XDOT 0.00078573 +/- 0.0001 Ecliptic YDOT -0.00266751 +/- 0.0001 Ecliptic ZDOT -0.00046439 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.03853168 +/- 0.0246 Geocenter to KBO 40.17814687 +/- 0.0337 # Hcoef: 8.20
The following table shows the complete astrometric record for 15FH561. 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 (15FH561) followed by the observatory code and reference code for the source of the astrometry.
2014 03 25.58017 14 19 39.92 +00 28 12.2 23.6y 15FH561 T09 C~8uZK 2014 03 25.60695 14 19 39.81 +00 28 12.7 23.9y 15FH561 T09 C~8uZK 2014 03 25.61630 14 19 39.79 +00 28 12.8 23.9y 15FH561 T09 C~8uZK 2014 03 25.62268 14 19 39.77 +00 28 13.2 23.8y 15FH561 T09 C~8uZK 2014 03 28.52036 14 19 28.36 +00 29 33.5 24.2i 15FH561 T09 C~8uZK 2014 03 28.52816 14 19 28.32 +00 29 33.8 24.1i 15FH561 T09 C~8uZK 2014 03 28.53884 14 19 28.27 +00 29 34.1 24.4i 15FH561 T09 C~8uZK 2014 03 28.55374 14 19 28.21 +00 29 34.5 24.3i 15FH561 T09 C~8uZK 2014 03 28.57245 14 19 28.14 +00 29 34.8 24.1i 15FH561 T09 C~8uZK 2014 03 28.58431 14 19 28.08 +00 29 35.3 23.9i 15FH561 T09 C~8uZK 2014 03 28.59624 14 19 28.05 +00 29 35.8 24.0i 15FH561 T09 C~8uZK 2014 03 28.60856 14 19 27.99 +00 29 36.0 24.0i 15FH561 T09 C~8uZK 2015 03 18.58895 14 24 52.54 -00 21 28.3 24.6r 15FH561 T09 C~8uZK 2015 03 18.61730 14 24 52.45 -00 21 27.6 24.6r 15FH561 T09 C~8uZK 2015 03 18.63105 14 24 52.40 -00 21 27.0 24.9r 15FH561 T09 C~8uZK 2015 03 18.64474 14 24 52.36 -00 21 26.6 24.6r 15FH561 T09 C~8uZK 2015 03 29.46071 14 24 12.58 -00 16 33.3 23.9y 15FH561 T09 C~8uZK 2015 03 29.47724 14 24 12.51 -00 16 33.0 24.0y 15FH561 T09 C~8uZK 2015 03 29.57215 14 24 12.13 -00 16 30.4 23.8z 15FH561 T09 C~8uZK 2015 03 29.58759 14 24 12.07 -00 16 29.9 24.1z 15FH561 T09 C~8uZK 2015 03 29.60118 14 24 12.02 -00 16 29.6 24.3z 15FH561 T09 C~8uZK
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 -0.15 0.00 0.18
2 0.0001 -1.72 -0.13 -0.08 -0.07
3 0.0001 -2.04 0.16 -0.09 -0.14
4 0.0001 -2.46 0.15 0.19 0.10
5 0.0080 -190.62 0.13 18.40 -0.02
6 0.0081 -191.29 -0.01 18.48 0.02
7 0.0081 -192.09 -0.10 18.51 -0.00
8 0.0081 -193.08 -0.08 18.58 -0.01
9 0.0082 -194.17 0.09 18.51 -0.18
10 0.0082 -195.18 -0.13 18.68 -0.07
11 0.0083 -195.77 0.08 19.00 0.18
12 0.0083 -196.69 -0.01 18.89 -0.00
13 0.9802 5418.90 -0.05 -1234.10 -0.05
14 0.9803 5417.39 0.07 -1233.89 -0.07
15 0.9803 5416.48 -0.04 -1233.57 0.13
16 0.9803 5415.78 0.04 -1233.40 0.19
17 1.0099 4754.85 -0.07 -1157.30 0.01
18 1.0100 4753.76 -0.06 -1157.37 -0.14
19 1.0102 4747.51 -0.00 -1156.83 -0.07
20 1.0103 4746.49 0.01 -1156.66 0.02
21 1.0103 4745.69 0.10 -1156.63 -0.01
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.
15FH561 quality flag:1 Type: SCATNEAR CENTAURS SCATEXTD axisobj 45.349 49.210 43.240 ecceobj 0.234 0.354 0.115 incobj 18.564 18.522 18.607 qmin 33.358 29.038 37.694 qmax 58.563 75.544 49.640 amean 45.609 50.151 43.521 amin 44.984 46.163 43.165 amax 46.319 53.136 43.901 emean 0.243 0.372 0.116 emin 0.216 0.324 0.102 emax 0.266 0.426 0.131 imean 16.796 16.041 17.064 imin 15.734 12.674 16.526 imax 17.677 18.478 17.586 excite_mean 0.377 0.465 0.316 fracstop 1.000 1.000 1.000 cjmean 2.947 2.902 2.976 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 181.5 172.4 178.8 kozaiamp 180.0 180.0 179.9