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: 15RK280
# Created Fri Nov 22 02:10:28 2024
# Orbit generated from Bernstein formalism
# Fitting 24 observations of 24
# Arc: 1.47y
# First observation: 2015/07/14
# Last observation: 2017/01/03
Preliminary a, adot, b, bdot, g, gdot:
-0.000071 0.017775 0.000015 0.007760 0.021525 0.000000
# Chi-squared of fit: 7.99 DOF: 42 RMS: 0.10
# Min/Max residuals: -0.28 0.22
# Exact a, adot, b, bdot, g, gdot:
1.352485E-05 1.748708E-02 5.491958E-06 7.709545E-03 2.131426E-02 1.328224E-03
# Covariance matrix:
2.9613E-13 9.9637E-15 -2.9862E-14 1.7541E-13 3.3060E-13 1.5352E-11
9.9637E-15 3.1689E-13 -1.7827E-14 1.0069E-13 2.3791E-13 8.8175E-12
-2.9862E-14 -1.7827E-14 1.3240E-13 -1.6954E-13 -6.2856E-14 -4.5251E-12
1.7541E-13 1.0069E-13 -1.6954E-13 5.3969E-13 3.7430E-13 2.8307E-11
3.3060E-13 2.3791E-13 -6.2856E-14 3.7430E-13 6.4486E-13 3.2753E-11
1.5352E-11 8.8175E-12 -4.5251E-12 2.8307E-11 3.2753E-11 2.4753E-09
# lat0 lon0 xBary yBary zBary JD0
1.256768 11.924632 1.002528 0.003925 -0.174272 2457218.068079
# Heliocentric elements and errors
Epoch: 2457210.5000 = 2015/07/07
Mean Anomaly: 126.95141 +/- 1.576
Argument of Peri: 230.60765 +/- 1.560
Long of Asc Node: 7.87531 +/- 0.000
Inclination: 23.87691 +/- 0.001
Eccentricity: 0.06316634 +/- 0.0018
Semi-Major Axis: 45.26963182 +/- 0.0117
Time of Perihelion: 2417978.1878 +/- 486.7
Perihelion: 42.41011475 +/- 0.0825
Aphelion: 48.12914890 +/- 0.0827
Period (y) 304.5921 +/- 0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 46.26755645 +/- 0.0017
Ecliptic Y 8.74733497 +/- 0.0003
Ecliptic Z 1.02933749 +/- 0.0000
Ecliptic XDOT -0.00032077 +/- 0.0000
Ecliptic YDOT 0.00222224 +/- 0.0000
Ecliptic ZDOT 0.00099387 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 47.09843081 +/- 0.0017
Geocenter to KBO 46.91695116 +/- 0.0018
# Hcoef: 8.33
The following table shows the complete astrometric record for 15RK280. 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 (15RK280) followed by the observatory code and reference code for the source of the astrometry.
2015 07 14.56729 00 41 53.322 +05 52 16.62 25.1r 15RK280 568 C~2nvq 2015 07 19.54532 00 41 50.733 +05 52 32.37 25.3r 15RK280 568 C~2nvq 2015 08 11.50751 00 41 15.222 +05 51 13.99 25.0r 15RK280 568 C~2nvq 2015 08 11.54916 00 41 15.114 +05 51 13.28 25.5r 15RK280 568 C~2nvq 2015 09 08.41317 00 39 48.183 +05 44 47.49 15RK280 568 C~2nvq 2015 09 08.51862 00 39 47.765 +05 44 45.82 24.7r 15RK280 568 C~2nvq 2015 09 08.56094 00 39 47.604 +05 44 45.23 24.6r 15RK280 568 C~2nvq 2015 09 09.53652 00 39 43.914 +05 44 26.96 25.3w 15RK280 568 C~2nvq 2015 09 10.47732 00 39 40.311 +05 44 09.35 25.2w 15RK280 568 C~2nvq 2015 09 16.46890 00 39 16.751 +05 42 12.56 25.0w 15RK280 568 C~2nvq 2015 10 07.36274 00 37 49.588 +05 34 43.19 24.9r 15RK280 568 C~2nvq 2015 10 07.41585 00 37 49.356 +05 34 41.93 24.8r 15RK280 568 C~2nvq 2015 11 07.26021 00 35 48.469 +05 23 58.94 25.1w 15RK280 568 C~2nvq 2015 11 07.31307 00 35 48.283 +05 23 58.00 25.4w 15RK280 568 C~2nvq 2015 11 10.39917 00 35 38.074 +05 23 04.02 25.1w 15RK280 568 C~2nvq 2015 12 07.33665 00 34 33.501 +05 17 36.49 25.3w 15RK280 568 C~2nvq 2016 09 05.50258 00 42 59.129 +06 33 59.03 25.1w 15RK280 568 C~2nvq 2016 09 06.45678 00 42 55.607 +06 33 42.24 25.3w 15RK280 568 C~2nvq 2016 09 06.49805 00 42 55.468 +06 33 41.66 25.5w 15RK280 568 C~2nvq 2016 09 26.45968 00 41 35.763 +06 27 08.18 25.0w 15RK280 568 C~2nvq 2016 11 04.27703 00 38 58.622 +06 13 15.42 25.1w 15RK280 568 C~2nvq 2016 11 04.33644 00 38 58.410 +06 13 14.28 25.5w 15RK280 568 C~2nvq 2016 12 29.27436 00 37 20.067 +06 05 04.97 25.9w 15RK280 568 C~2nvq 2017 01 03.24627 00 37 22.588 +06 05 30.48 25.5w 15RK280 568 C~2nvq
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 -0.11 0.00 0.05
2 0.0136 -29.39 0.02 29.61 -0.02
3 0.0765 -547.67 0.19 164.87 0.19
4 0.0766 -549.44 -0.06 164.85 -0.09
5 0.1529 -1894.21 0.03 318.19 -0.28
6 0.1532 -1900.61 -0.05 319.10 0.03
7 0.1533 -1903.05 0.05 319.50 0.19
8 0.1560 -1960.88 0.03 324.28 -0.07
9 0.1585 -2017.26 -0.12 329.17 -0.02
10 0.1750 -2386.57 -0.16 359.67 0.08
11 0.2322 -3759.96 0.22 457.21 -0.00
12 0.2323 -3763.64 0.14 457.41 -0.06
13 0.3167 -5677.08 -0.05 576.15 -0.05
14 0.3169 -5680.01 -0.09 576.38 -0.03
15 0.3253 -5841.53 0.03 586.78 0.09
16 0.3991 -6857.94 -0.07 665.70 -0.04
17 1.1470 1881.74 0.08 1919.60 0.12
18 1.1496 1826.86 -0.24 1924.65 -0.07
19 1.1497 1824.73 0.05 1924.92 -0.04
20 1.2044 577.48 0.10 2027.32 0.04
21 1.3106 -1904.37 -0.01 2179.42 0.01
22 1.3108 -1907.73 0.02 2179.61 -0.01
23 1.4612 -3449.06 -0.04 2305.89 0.10
24 1.4748 -3404.44 0.04 2314.56 -0.12
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.
15RK280 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 45.679 45.720 45.642 ecceobj 0.058 0.064 0.053 incobj 23.750 23.750 23.749 qmin 42.014 41.794 42.169 qmax 49.166 49.418 48.916 amean 45.459 45.505 45.423 amin 45.108 45.151 45.079 amax 45.829 45.880 45.798 emean 0.061 0.066 0.057 emin 0.051 0.055 0.047 emax 0.073 0.077 0.068 imean 23.993 23.999 23.989 imin 23.731 23.739 23.732 imax 24.248 24.255 24.246 excite_mean 0.411 0.412 0.411 fracstop 1.000 1.000 1.000 cjmean 2.903 2.903 2.903 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 181.7 180.7 182.5 kozaiamp 180.0 180.0 180.0