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: 15RL258 # Created Tue Apr 1 01:10:31 2025 # Orbit generated from Bernstein formalism # Fitting 10 observations of 10 # Arc: 1.07y # First observation: 2015/09/05 # Last observation: 2016/10/01 Preliminary a, adot, b, bdot, g, gdot: 0.000001 0.010340 -0.000000 -0.002013 0.015776 0.000000 # Chi-squared of fit: 1.93 DOF: 14 RMS: 0.08 # Min/Max residuals: -0.12 0.18 # Exact a, adot, b, bdot, g, gdot: 1.071867E-05 1.038015E-02 -1.946980E-06 -2.020099E-03 1.588883E-02 -2.469261E-03 # Covariance matrix: 4.8403E-13 8.2651E-13 -4.0677E-14 -2.1865E-13 1.4624E-12 1.3870E-10 8.2651E-13 3.1116E-10 -6.1744E-13 -6.3185E-11 1.4649E-10 4.3262E-08 -4.0677E-14 -6.1744E-13 3.3163E-13 -1.9083E-13 -5.1499E-13 -8.1147E-11 -2.1865E-13 -6.3185E-11 -1.9083E-13 1.3420E-11 -2.9724E-11 -8.8023E-09 1.4624E-12 1.4649E-10 -5.1499E-13 -2.9724E-11 7.4483E-11 2.0288E-08 1.3870E-10 4.3262E-08 -8.1147E-11 -8.8023E-09 2.0288E-08 6.0282E-06 # lat0 lon0 xBary yBary zBary JD0 -11.872182 -46.308598 -0.480070 -0.183044 -0.871439 2457270.511879 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 232.58201 +/- 29.678 Argument of Peri: 18.36007 +/- 25.215 Long of Asc Node: 87.57562 +/- 0.155 Inclination: 15.93065 +/- 0.039 Eccentricity: 0.32841369 +/- 0.0805 Semi-Major Axis: 51.04133492 +/- 3.1202 Time of Perihelion: 2504412.6865 +/- 10093.4 Perihelion: 34.27866175 +/- 4.6146 Aphelion: 67.80400808 +/- 5.8381 Period (y) 364.6626 +/- 33.44 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 43.50459849 +/- 0.0231 Ecliptic Y -44.84704351 +/- 0.0242 Ecliptic Z -12.94815072 +/- 0.0070 Ecliptic XDOT 0.00095433 +/- 0.0003 Ecliptic YDOT 0.00158199 +/- 0.0003 Ecliptic ZDOT -0.00025306 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 63.80879256 +/- 0.0232 Geocenter to KBO 62.93731245 +/- 0.0342 # Hcoef: 6.43
The following table shows the complete astrometric record for 15RL258. 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 (15RL258) followed by the observatory code and reference code for the source of the astrometry.
2015 09 05.01109 21 19 58.210 -28 02 55.18 24.4r 15RL258 807 C~2ZsD 2015 09 05.08889 21 19 57.954 -28 02 55.81 24.4r 15RL258 807 C~2ZsD 2015 09 05.16400 21 19 57.734 -28 02 56.57 24.4r 15RL258 807 C~2ZsD 2015 10 16.07957 21 18 22.986 -28 04 26.75 15RL258 304 C~2ZsD 2015 10 16.18163 21 18 22.849 -28 04 26.26 15RL258 304 C~2ZsD 2016 09 26.04223 21 21 40.079 -28 00 25.86 15RL258 304 C~2ZsD 2016 09 26.14675 21 21 39.820 -28 00 26.11 15RL258 304 C~2ZsD 2016 09 27.01043 21 21 37.829 -28 00 27.64 15RL258 304 C~2ZsD 2016 09 27.03922 21 21 37.764 -28 00 27.77 15RL258 304 C~2ZsD 2016 10 01.07225 21 21 28.886 -28 00 31.66 15RL258 304 C~2ZsD
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 -0.08 0.00 -0.01
2 0.0002 -3.42 -0.10 0.46 0.09
3 0.0004 -6.42 0.18 0.64 -0.07
4 0.1124 -1226.82 0.07 303.42 -0.00
5 0.1127 -1228.40 -0.07 304.44 -0.00
6 1.0596 1327.81 -0.02 -280.36 -0.04
7 1.0599 1324.47 -0.12 -279.52 -0.04
8 1.0623 1298.96 0.05 -272.68 0.02
9 1.0624 1298.10 0.07 -272.53 -0.07
10 1.0734 1185.27 0.01 -239.25 0.13
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.
15RL258 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0