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: 15RK278
# Created Sun Dec 22 02:10:28 2024
# Orbit generated from Bernstein formalism
# Fitting 28 observations of 28
# Arc: 2.25y
# First observation: 2015/06/23
# Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
-0.000098 0.025832 0.000015 0.004192 0.025582 0.000000
# Chi-squared of fit: 6.30 DOF: 50 RMS: 0.08
# Min/Max residuals: -0.28 0.19
# Exact a, adot, b, bdot, g, gdot:
1.570307E-05 2.528100E-02 2.659105E-06 4.125081E-03 2.518132E-02 4.277370E-03
# Covariance matrix:
1.9442E-13 -2.1762E-14 -8.8263E-15 1.1521E-14 1.3833E-13 1.3366E-12
-2.1762E-14 4.7333E-13 -3.7113E-14 1.0149E-13 3.2518E-13 1.0930E-11
-8.8263E-15 -3.7113E-14 1.2669E-13 -1.0186E-13 -3.5804E-14 -1.1132E-12
1.1521E-14 1.0149E-13 -1.0186E-13 1.4592E-13 8.1636E-14 3.2178E-12
1.3833E-13 3.2518E-13 -3.5804E-14 8.1636E-14 3.9239E-13 8.9153E-12
1.3366E-12 1.0930E-11 -1.1132E-12 3.2178E-12 8.9153E-12 3.4521E-10
# lat0 lon0 xBary yBary zBary JD0
3.006304 10.375331 1.004784 -0.007922 0.152571 2457197.024748
# Heliocentric elements and errors
Epoch: 2457190.5000 = 2015/06/17
Mean Anomaly: 58.12623 +/- 0.025
Argument of Peri: 303.66616 +/- 0.069
Long of Asc Node: 351.15434 +/- 0.001
Inclination: 9.80170 +/- 0.001
Eccentricity: 0.15184200 +/- 0.0007
Semi-Major Axis: 42.16207808 +/- 0.0103
Time of Perihelion: 2441045.0152 +/- 3.5
Perihelion: 35.76010377 +/- 0.0320
Aphelion: 48.56405239 +/- 0.0330
Period (y) 273.7734 +/- 0.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 39.03604131 +/- 0.0010
Ecliptic Y 6.12670214 +/- 0.0002
Ecliptic Z 2.08289365 +/- 0.0001
Ecliptic XDOT -0.00006380 +/- 0.0000
Ecliptic YDOT 0.00277691 +/- 0.0000
Ecliptic ZDOT 0.00047234 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.56876857 +/- 0.0010
Geocenter to KBO 39.71197603 +/- 0.0010
# Hcoef: 8.05
The following table shows the complete astrometric record for 15RK278. 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 (15RK278) followed by the observatory code and reference code for the source of the astrometry.
2015 06 23.52397 00 33 23.567 +06 52 20.40 15RK278 568 C~2lVQ 2015 07 14.60825 00 33 35.996 +06 56 19.90 24.2r 15RK278 568 C~2lVQ 2015 07 19.58736 00 33 33.018 +06 56 38.44 24.1r 15RK278 568 C~2lVQ 2015 08 20.42114 00 32 24.538 +06 53 03.19 24.0r 15RK278 568 C~2lVQ 2015 08 20.47055 00 32 24.374 +06 53 02.51 24.0r 15RK278 568 C~2lVQ 2015 09 07.56844 00 31 14.264 +06 47 14.95 24.1w 15RK278 568 C~2lVQ 2015 09 09.39585 00 31 06.323 +06 46 32.82 24.2r 15RK278 568 C~2lVQ 2015 09 09.43729 00 31 06.140 +06 46 31.86 23.9r 15RK278 568 C~2lVQ 2015 09 09.47825 00 31 05.954 +06 46 30.90 24.1r 15RK278 568 C~2lVQ 2015 09 18.46210 00 30 25.144 +06 42 48.36 24.3w 15RK278 568 C~2lVQ 2015 10 08.34986 00 28 50.100 +06 33 38.50 24.1w 15RK278 568 C~2lVQ 2015 10 08.40250 00 28 49.846 +06 33 36.98 24.1w 15RK278 568 C~2lVQ 2015 11 10.44543 00 26 29.015 +06 18 48.87 23.8w 15RK278 568 C~2lVQ 2015 11 10.47307 00 26 28.901 +06 18 48.48 24.3w 15RK278 568 C~2lVQ 2016 01 01.30664 00 25 22.041 +06 09 41.98 24.3w 15RK278 568 C~2lVQ 2016 09 05.47832 00 36 26.038 +07 36 00.67 24.4w 15RK278 568 C~2lVQ 2016 09 05.59522 00 36 25.528 +07 35 57.99 24.5w 15RK278 568 C~2lVQ 2016 09 06.43252 00 36 22.013 +07 35 39.90 24.1w 15RK278 568 C~2lVQ 2016 09 06.47297 00 36 21.839 +07 35 39.01 24.2w 15RK278 568 C~2lVQ 2016 09 06.54431 00 36 21.520 +07 35 37.43 24.1w 15RK278 568 C~2lVQ 2016 09 06.58642 00 36 21.339 +07 35 36.52 24.4w 15RK278 568 C~2lVQ 2016 09 27.50093 00 34 45.505 +07 26 53.06 24.0w 15RK278 568 C~2lVQ 2016 11 03.37989 00 31 57.707 +07 09 47.88 24.3w 15RK278 568 C~2lVQ 2016 11 03.43780 00 31 57.488 +07 09 46.44 24.4w 15RK278 568 C~2lVQ 2016 12 25.26033 00 30 16.558 +06 57 02.17 24.4w 15RK278 568 C~2lVQ 2017 01 02.30275 00 30 22.811 +06 57 15.96 24.3w 15RK278 568 C~2lVQ 2017 09 16.52796 00 40 43.675 +08 19 35.24 24.1w 15RK278 568 C~2lVQ 2017 09 22.48140 00 40 16.101 +08 17 05.45 24.3w 15RK278 568 C~2lVQ
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 -0.01
2 0.0577 264.48 0.03 147.19 0.05
3 0.0714 231.03 0.07 181.70 -0.01
4 0.1585 -790.96 -0.16 385.98 -0.01
5 0.1586 -793.47 -0.06 386.31 0.03
6 0.2082 -1890.09 -0.09 479.30 0.04
7 0.2132 -2015.40 0.00 487.35 0.06
8 0.2133 -2018.28 0.04 487.54 0.05
9 0.2134 -2021.21 0.00 487.75 0.06
10 0.2380 -2667.66 0.08 523.70 -0.04
11 0.2925 -4186.19 0.12 579.41 -0.02
12 0.2926 -4190.27 0.14 579.51 -0.05
13 0.3831 -6471.04 -0.05 597.26 -0.28
14 0.3832 -6472.76 -0.19 597.58 0.06
15 0.5251 -7606.13 0.03 492.42 0.09
16 1.2045 3527.44 0.04 1341.16 0.09
17 1.2048 3519.41 -0.14 1341.67 -0.01
18 1.2071 3464.23 0.04 1345.55 0.00
19 1.2073 3461.50 0.05 1345.74 -0.01
20 1.2074 3456.51 -0.09 1346.15 0.03
21 1.2076 3453.68 -0.06 1346.37 0.04
22 1.2648 1937.19 0.05 1425.08 -0.02
23 1.3658 -761.44 0.01 1466.79 0.03
24 1.3660 -765.00 0.19 1466.75 -0.00
25 1.5078 -2447.36 -0.16 1358.53 -0.21
26 1.5299 -2356.38 0.07 1334.36 0.00
27 2.2341 8076.79 -0.03 2250.13 0.01
28 2.2504 7640.86 0.04 2271.91 0.06
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.
15RK278 quality flag:3 Type: 5:3EE 5:3EE 5:3EE axisobj 42.581 42.614 42.549 ecceobj 0.156 0.158 0.155 incobj 9.759 9.759 9.759 qmin 34.932 34.838 34.964 qmax 50.080 50.155 50.185 amean 42.328 42.328 42.328 amin 41.936 41.919 41.966 amax 42.749 42.769 42.754 emean 0.152 0.151 0.151 emin 0.128 0.123 0.130 emax 0.172 0.175 0.175 imean 10.417 10.460 10.407 imin 9.632 9.539 9.693 imax 11.279 11.495 11.186 excite_mean 0.236 0.236 0.236 fracstop 1.000 1.000 1.000 cjmean 3.016 3.016 3.016 libcent 0 180.2 181.4 179.7 libamp 0 48.0 72.4 31.4 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 181.1 180.2 177.1 kozaiamp 180.0 179.9 179.9