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: 15RQ281 # Created Tue Jan 21 02:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 13 observations of 13 # Arc: 2.70y # First observation: 2015/09/05 # Last observation: 2018/05/19 Preliminary a, adot, b, bdot, g, gdot: -0.000092 0.012102 0.000062 0.003466 0.015483 0.000000 # Chi-squared of fit: 28.02 DOF: 20 RMS: 0.26 # Min/Max residuals: -0.52 0.44 # Exact a, adot, b, bdot, g, gdot: 1.227053E-05 1.241906E-02 4.327920E-06 3.592980E-03 1.623242E-02 8.943349E-03 # Covariance matrix: 4.6511E-13 -1.2410E-13 -5.7824E-14 6.6086E-14 7.9213E-13 8.0299E-12 -1.2410E-13 9.6847E-13 -1.1768E-13 2.6784E-13 9.5623E-13 2.6244E-11 -5.7824E-14 -1.1768E-13 2.4944E-13 -1.7604E-13 -3.2419E-13 -5.6610E-12 6.6086E-14 2.6784E-13 -1.7604E-13 2.5000E-13 5.2641E-13 1.0730E-11 7.9213E-13 9.5623E-13 -3.2419E-13 5.2641E-13 3.6743E-12 5.6596E-11 8.0299E-12 2.6244E-11 -5.6610E-12 1.0730E-11 5.6596E-11 1.1024E-09 # lat0 lon0 xBary yBary zBary JD0 -10.942006 -37.615438 -0.341038 -0.180629 -0.935115 2457270.577949 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 17.40495 +/- 0.165 Argument of Peri: 234.97728 +/- 0.024 Long of Asc Node: 355.45965 +/- 0.003 Inclination: 19.37933 +/- 0.001 Eccentricity: 0.69750091 +/- 0.0024 Semi-Major Axis: 120.71587634 +/- 0.7474 Time of Perihelion: 2433848.9669 +/- 43.0 Perihelion: 36.51644322 +/- 0.3662 Aphelion: 204.91530946 +/- 1.3010 Period (y) 1326.3398 +/- 12.32 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 48.87130010 +/- 0.0056 Ecliptic Y -37.22882818 +/- 0.0044 Ecliptic Z -11.69333032 +/- 0.0014 Ecliptic XDOT 0.00254088 +/- 0.0000 Ecliptic YDOT 0.00067867 +/- 0.0000 Ecliptic ZDOT 0.00030872 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 62.53897661 +/- 0.0051 Geocenter to KBO 61.60511705 +/- 0.0073 # Hcoef: 6.72
The following table shows the complete astrometric record for 15RQ281. 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 (15RQ281) followed by the observatory code and reference code for the source of the astrometry.
2015 09 05.07716 21 54 29.370 -24 21 48.77 24.9r 15RQ281 807 C~31Lt 2015 09 05.15157 21 54 29.124 -24 21 49.82 24.7r 15RQ281 807 C~31Lt 2015 09 05.23067 21 54 28.862 -24 21 50.60 24.8r 15RQ281 807 C~31Lt 2015 10 16.10458 21 52 40.213 -24 24 25.76 15RQ281 304 C~31Lt 2015 10 16.17460 21 52 40.091 -24 24 25.48 15RQ281 304 C~31Lt 2015 12 09.05774 21 52 42.031 -24 12 33.36 24.9r 15RQ281 304 C~31Lt 2016 09 27.02253 21 55 55.553 -23 58 26.77 24.7r 15RQ281 304 C~31Lt 2016 09 27.05572 21 55 55.456 -23 58 27.02 24.6r 15RQ281 304 C~31Lt 2016 09 27.10315 21 55 55.330 -23 58 27.31 24.7r 15RQ281 304 C~31Lt 2016 09 28.03454 21 55 52.925 -23 58 30.47 24.3r 15RQ281 304 C~31Lt 2016 10 01.02910 21 55 45.332 -23 58 38.68 24.5r 15RQ281 304 C~31Lt 2018 05 16.38925 22 05 51.400 -22 38 15.07 24.6r 15RQ281 304 C~31Lt 2018 05 19.39354 22 05 53.214 -22 38 30.47 24.7r 15RQ281 304 C~31Lt
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 -0.04 0.00 -0.17
2 0.0002 -3.52 -0.04 0.18 -0.44
3 0.0004 -7.15 0.07 0.68 -0.42
4 0.1123 -1454.16 -0.10 366.15 0.43
5 0.1125 -1455.63 -0.09 366.98 0.44
6 0.2600 -1186.57 0.41 1026.87 -0.52
7 1.0621 1592.77 -0.04 905.48 0.32
8 1.0622 1591.44 -0.18 905.71 0.24
9 1.0624 1589.72 -0.20 906.04 0.13
10 1.0649 1557.72 0.16 914.56 0.10
11 1.0731 1457.29 -0.03 943.09 0.33
12 2.6949 10987.70 0.04 2477.67 -0.25
13 2.7031 11005.52 0.04 2454.15 -0.19
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.
15RQ281 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 120.487 122.592 118.478 ecceobj 0.695 0.701 0.688 incobj 19.299 19.299 19.298 qmin 35.327 35.280 35.538 qmax 218.070 220.204 209.000 amean 121.724 123.753 118.719 amin 119.032 120.838 115.396 amax 127.735 128.319 122.925 emean 0.696 0.704 0.687 emin 0.683 0.693 0.673 emax 0.710 0.716 0.701 imean 20.422 20.028 20.431 imin 19.402 19.707 19.459 imax 21.700 20.971 21.709 excite_mean 0.779 0.783 0.771 fracstop 1.000 1.000 1.000 cjmean 2.952 2.947 2.957 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 248.9 285.0 245.1 kozaiamp 180.0 53.0 180.0