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: 15RK281
# Created Wed May 8 01:17:20 2024
# Orbit generated from Bernstein formalism
# Fitting 27 observations of 27
# Arc: 2.44y
# First observation: 2015/07/14
# Last observation: 2017/12/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000054 0.023247 0.000003 0.000534 0.023668 0.000000
# Chi-squared of fit: 8.57 DOF: 48 RMS: 0.10
# Min/Max residuals: -0.24 0.29
# Exact a, adot, b, bdot, g, gdot:
1.598138E-05 2.289203E-02 3.005891E-07 5.245575E-04 2.345957E-02 -1.003537E-03
# Covariance matrix:
2.0404E-13 2.9405E-14 -3.4026E-15 3.7347E-15 1.6661E-13 2.4644E-12
2.9405E-14 4.3138E-13 -8.3575E-15 1.7109E-14 3.2379E-13 1.1133E-11
-3.4026E-15 -8.3575E-15 1.1347E-13 -7.3589E-14 -8.9436E-15 -2.5865E-13
3.7347E-15 1.7109E-14 -7.3589E-14 8.9802E-14 1.4563E-14 5.7633E-13
1.6661E-13 3.2379E-13 -8.9436E-15 1.4563E-14 3.8682E-13 9.5162E-12
2.4644E-12 1.1133E-11 -2.5865E-13 5.7633E-13 9.5162E-12 3.7452E-10
# lat0 lon0 xBary yBary zBary JD0
1.835584 11.901069 1.002469 0.005696 -0.174567 2457218.063999
# Heliocentric elements and errors
Epoch: 2457210.5000 = 2015/07/07
Mean Anomaly: 298.13843 +/- 0.165
Argument of Peri: 123.04454 +/- 0.253
Long of Asc Node: 317.29028 +/- 0.015
Inclination: 2.28019 +/- 0.000
Eccentricity: 0.07513856 +/- 0.0008
Semi-Major Axis: 44.17192130 +/- 0.0058
Time of Perihelion: 2475636.7214 +/- 49.1
Perihelion: 40.85290678 +/- 0.0361
Aphelion: 47.49093583 +/- 0.0362
Period (y) 293.5808 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 42.06290111 +/- 0.0011
Ecliptic Y 7.84151430 +/- 0.0002
Ecliptic Z 1.36545631 +/- 0.0000
Ecliptic XDOT -0.00066969 +/- 0.0000
Ecliptic YDOT 0.00258336 +/- 0.0000
Ecliptic ZDOT 0.00005750 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.80936191 +/- 0.0011
Geocenter to KBO 42.62652007 +/- 0.0011
# Hcoef: 8.54
The following table shows the complete astrometric record for 15RK281. 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 (15RK281) followed by the observatory code and reference code for the source of the astrometry.
2015 07 14.56321 00 40 53.398 +06 23 40.88 25.4r 15RK281 568 C~2nvt 2015 07 19.54121 00 40 51.658 +06 23 45.37 25.3r 15RK281 568 C~2nvt 2015 08 13.49630 00 40 12.882 +06 20 51.19 24.8r 15RK281 568 C~2nvt 2015 08 20.43431 00 39 53.980 +06 19 08.66 25.0r 15RK281 568 C~2nvt 2015 08 20.48358 00 39 53.830 +06 19 07.72 24.8r 15RK281 568 C~2nvt 2015 09 09.40852 00 38 44.250 +06 12 25.10 24.8r 15RK281 568 C~2nvt 2015 09 09.44963 00 38 44.077 +06 12 24.19 24.8r 15RK281 568 C~2nvt 2015 09 09.49055 00 38 43.913 +06 12 23.19 24.5r 15RK281 568 C~2nvt 2015 09 18.47788 00 38 06.949 +06 08 40.01 25.2w 15RK281 568 C~2nvt 2015 10 08.36567 00 36 39.899 +05 59 37.91 25.1w 15RK281 568 C~2nvt 2015 10 08.41827 00 36 39.662 +05 59 36.33 24.9w 15RK281 568 C~2nvt 2015 10 09.33525 00 36 35.619 +05 59 10.79 25.2w 15RK281 568 C~2nvt 2015 12 08.25986 00 33 22.733 +05 37 18.42 25.3w 15RK281 568 C~2nvt 2016 01 01.32225 00 33 17.882 +05 35 46.14 24.9w 15RK281 568 C~2nvt 2016 01 02.27354 00 33 18.759 +05 35 49.06 25.2w 15RK281 568 C~2nvt 2016 09 05.50664 00 43 49.745 +06 46 37.08 25.2w 15RK281 568 C~2nvt 2016 09 06.46082 00 43 46.116 +06 46 15.76 24.8w 15RK281 568 C~2nvt 2016 09 06.50211 00 43 45.966 +06 46 14.83 25.1w 15RK281 568 C~2nvt 2016 09 26.45968 00 42 22.911 +06 37 54.36 24.6w 15RK281 568 C~2nvt 2016 11 04.27703 00 39 38.615 +06 20 21.11 25.2w 15RK281 568 C~2nvt 2016 11 04.33644 00 39 38.393 +06 20 19.72 24.9w 15RK281 568 C~2nvt 2016 12 29.27436 00 38 02.450 +06 08 09.37 25.2w 15RK281 568 C~2nvt 2017 01 03.24627 00 38 06.337 +06 08 20.78 25.0w 15RK281 568 C~2nvt 2017 09 15.43089 00 48 06.314 +07 15 45.87 24.4w 15RK281 568 C~2nvt 2017 09 16.51398 00 48 01.819 +07 15 19.39 25.2w 15RK281 568 C~2nvt 2017 09 22.46739 00 47 36.574 +07 12 48.03 24.6w 15RK281 568 C~2nvt 2017 12 23.28322 00 42 49.473 +06 40 46.24 25.4w 15RK281 568 C~2nvt
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 0.01
2 0.0136 -22.11 0.15 14.29 0.02
3 0.0820 -622.18 0.20 80.53 -0.13
4 0.1009 -921.62 0.01 96.68 0.07
5 0.1011 -924.05 -0.06 96.69 -0.05
6 0.1556 -2036.36 0.04 133.42 -0.05
7 0.1557 -2039.09 -0.03 133.60 0.04
8 0.1559 -2041.73 -0.02 133.64 0.00
9 0.1805 -2636.41 -0.23 144.90 -0.13
10 0.2349 -4043.79 0.07 156.99 0.01
11 0.2351 -4047.66 0.02 156.93 -0.08
12 0.2376 -4113.18 -0.01 157.19 0.11
13 0.4016 -7278.36 0.05 85.69 0.07
14 0.4675 -7381.46 0.06 29.47 0.16
15 0.4701 -7368.26 -0.03 26.98 -0.01
16 1.1470 2956.85 -0.01 239.23 0.02
17 1.1496 2898.75 0.01 240.70 -0.01
18 1.1497 2896.33 0.16 240.72 -0.08
19 1.2044 1561.66 -0.08 263.38 0.01
20 1.3106 -1103.94 -0.09 253.16 0.01
21 1.3108 -1107.53 -0.06 253.18 0.07
22 1.4612 -2710.16 0.00 143.08 -0.00
23 1.4748 -2652.36 -0.14 130.80 0.00
24 2.1735 7158.67 -0.05 363.29 -0.24
25 2.1765 7086.66 -0.05 364.85 -0.01
26 2.1928 6681.26 -0.03 371.25 0.29
27 2.4441 1993.14 0.24 266.90 -0.07
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.
15RK281 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.628 44.641 44.616 ecceobj 0.078 0.080 0.077 incobj 2.276 2.276 2.276 qmin 39.929 39.895 39.987 qmax 48.992 49.136 48.891 amean 44.371 44.383 44.359 amin 44.007 44.037 44.000 amax 44.746 44.760 44.735 emean 0.080 0.082 0.079 emin 0.065 0.066 0.064 emax 0.096 0.098 0.093 imean 3.604 3.601 3.607 imin 2.862 2.854 2.867 imax 4.265 4.263 4.260 excite_mean 0.102 0.104 0.101 fracstop 1.000 1.000 1.000 cjmean 3.093 3.093 3.093 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 180.7 180.8 180.5 kozaiamp 180.0 180.0 180.0