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: 15RK258 # Created Sun Nov 24 02:10:23 2024 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 1.16y # First observation: 2015/09/05 # Last observation: 2016/11/03 Preliminary a, adot, b, bdot, g, gdot: 0.000008 0.014001 0.000001 -0.000009 0.017480 0.000000 # Chi-squared of fit: 7.87 DOF: 18 RMS: 0.14 # Min/Max residuals: -0.35 0.24 # Exact a, adot, b, bdot, g, gdot: 1.357703E-05 1.415854E-02 3.348697E-07 2.384221E-06 1.760979E-02 7.542624E-03 # Covariance matrix: 4.8619E-13 6.5209E-13 -3.2245E-14 4.8355E-14 1.2080E-12 7.9658E-11 6.5209E-13 1.2467E-11 -2.6557E-13 1.0263E-12 9.1485E-12 1.1757E-09 -3.2245E-14 -2.6557E-13 3.2697E-13 -3.1891E-13 -2.6167E-13 -2.4337E-11 4.8355E-14 1.0263E-12 -3.1891E-13 5.6247E-13 6.0677E-13 1.0547E-10 1.2080E-12 9.1485E-12 -2.6167E-13 6.0677E-13 9.5296E-12 8.2380E-10 7.9658E-11 1.1757E-09 -2.4337E-11 1.0547E-10 8.2380E-10 1.1720E-07 # lat0 lon0 xBary yBary zBary JD0 -9.468207 -38.867774 -0.361596 -0.155266 -0.931942 2457270.567019 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 39.11149 +/- 1.989 Argument of Peri: 172.52446 +/- 0.292 Long of Asc Node: 51.50650 +/- 0.023 Inclination: 9.31411 +/- 0.000 Eccentricity: 0.51163320 +/- 0.0224 Semi-Major Axis: 72.98770711 +/- 2.2393 Time of Perihelion: 2432526.2177 +/- 535.8 Perihelion: 35.64477301 +/- 1.9664 Aphelion: 110.33064120 +/- 3.7588 Period (y) 623.5665 +/- 28.70 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 44.57094768 +/- 0.0076 Ecliptic Y -35.46093219 +/- 0.0062 Ecliptic Z -9.34139164 +/- 0.0016 Ecliptic XDOT 0.00228012 +/- 0.0000 Ecliptic YDOT 0.00098160 +/- 0.0000 Ecliptic ZDOT -0.00019249 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 57.71749031 +/- 0.0070 Geocenter to KBO 56.78660460 +/- 0.0100 # Hcoef: 7.12
The following table shows the complete astrometric record for 15RK258. 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 (15RK258) followed by the observatory code and reference code for the source of the astrometry.
2015 09 05.06623 21 47 13.164 -23 23 58.40 25. r 15RK258 807 C~2ZsD 2015 09 05.14076 21 47 12.908 -23 23 59.03 15RK258 807 C~2ZsD 2015 09 05.22453 21 47 12.624 -23 24 00.35 15RK258 807 C~2ZsD 2015 10 16.09943 21 45 22.140 -23 28 14.04 15RK258 304 C~2ZsD 2015 10 16.16906 21 45 22.007 -23 28 13.81 15RK258 304 C~2ZsD 2016 09 25.18782 21 49 24.406 -23 11 06.54 15RK258 304 C~2ZsD 2016 09 27.19436 21 49 18.948 -23 11 19.34 24.7r 15RK258 304 C~2ZsD 2016 09 27.22916 21 49 18.847 -23 11 19.47 24.6r 15RK258 304 C~2ZsD 2016 09 28.03954 21 49 16.702 -23 11 24.27 24.6r 15RK258 304 C~2ZsD 2016 10 01.03537 21 49 09.005 -23 11 39.42 24.6r 15RK258 304 C~2ZsD 2016 11 02.07785 21 48 19.300 -23 10 44.05 15RK258 304 C~2ZsD 2016 11 03.05266 21 48 18.886 -23 10 35.69 24.8r 15RK258 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 -0.18 0.00 -0.07
2 0.0002 -3.53 0.05 0.60 0.23
3 0.0004 -7.66 0.14 0.67 -0.04
4 0.1123 -1525.09 0.07 272.55 -0.17
5 0.1125 -1526.74 -0.09 273.38 0.00
6 1.0571 1962.86 -0.15 112.68 0.24
7 1.0626 1887.74 0.09 126.31 0.00
8 1.0627 1886.39 0.03 126.66 0.09
9 1.0650 1856.95 0.04 132.23 -0.02
10 1.0732 1752.00 0.14 154.14 -0.03
11 1.1609 1126.25 -0.35 439.19 -0.22
12 1.1635 1123.72 0.21 448.99 -0.02
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.
15RK258 quality flag:1 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 73.058 80.402 67.606 ecceobj 0.508 0.571 0.445 incobj 9.321 9.321 9.321 qmin 35.138 33.460 36.604 qmax 113.736 140.781 100.788 amean 73.320 81.937 67.866 amin 72.289 79.565 66.988 amax 74.798 87.657 69.033 emean 0.510 0.580 0.449 emin 0.501 0.565 0.439 emax 0.521 0.606 0.461 imean 8.620 8.431 7.992 imin 8.412 7.351 7.473 imax 8.807 9.318 8.593 excite_mean 0.532 0.598 0.471 fracstop 1.000 1.000 1.000 cjmean 3.064 3.026 3.099 libcent 0 185.7 -180.0 -180.0 libamp 0 166.1 -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 187.1 215.9 180.0 kozaiamp 180.0 179.8 180.0