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: 15RD278
# Created Sun Dec 22 02:10:28 2024
# Orbit generated from Bernstein formalism
# Fitting 32 observations of 32
# Arc: 2.18y
# First observation: 2015/07/19
# Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
-0.000178 0.028092 0.000001 -0.001273 0.026154 0.000000
# Chi-squared of fit: 11.81 DOF: 58 RMS: 0.11
# Min/Max residuals: -0.27 0.25
# Exact a, adot, b, bdot, g, gdot:
1.633334E-05 2.770610E-02 -6.153432E-07 -1.261796E-03 2.603410E-02 7.419275E-04
# Covariance matrix:
1.9577E-13 -2.6770E-14 6.3946E-16 -3.5084E-15 1.3199E-13 1.5502E-12
-2.6770E-14 3.5215E-13 4.1291E-15 -1.8338E-14 2.0298E-13 7.9377E-12
6.3946E-16 4.1291E-15 1.1213E-13 -8.8184E-14 3.0381E-15 1.4137E-13
-3.5084E-15 -1.8338E-14 -8.8184E-14 1.1656E-13 -1.4277E-14 -6.2300E-13
1.3199E-13 2.0298E-13 3.0381E-15 -1.4277E-14 2.6723E-13 6.2167E-12
1.5502E-12 7.9377E-12 1.4137E-13 -6.2300E-13 6.2167E-12 2.6944E-10
# lat0 lon0 xBary yBary zBary JD0
0.215838 8.919508 0.970059 0.001258 -0.307236 2457223.003419
# Heliocentric elements and errors
Epoch: 2457220.5000 = 2015/07/17
Mean Anomaly: 0.31539 +/- 0.274
Argument of Peri: 174.89346 +/- 0.343
Long of Asc Node: 192.18089 +/- 0.001
Inclination: 2.61391 +/- 0.001
Eccentricity: 0.10962061 +/- 0.0001
Semi-Major Axis: 43.49488291 +/- 0.0029
Time of Perihelion: 2457128.7089 +/- 79.7
Perihelion: 38.72694719 +/- 0.0036
Aphelion: 48.26281862 +/- 0.0041
Period (y) 286.8570 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 38.39674398 +/- 0.0008
Ecliptic Y 5.04509586 +/- 0.0001
Ecliptic Z 0.14472711 +/- 0.0000
Ecliptic XDOT -0.00037643 +/- 0.0000
Ecliptic YDOT 0.00288433 +/- 0.0000
Ecliptic ZDOT -0.00013234 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 38.72704335 +/- 0.0007
Geocenter to KBO 38.41115535 +/- 0.0008
# Hcoef: 8.92
The following table shows the complete astrometric record for 15RD278. 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 (15RD278) followed by the observatory code and reference code for the source of the astrometry.
2015 07 19.50263 00 32 26.103 +03 44 03.51 24.7r 15RD278 568 C~2lVP 2015 08 11.48475 00 31 46.628 +03 39 39.89 24.6r 15RD278 568 C~2lVP 2015 08 11.52861 00 31 46.495 +03 39 39.33 24.7r 15RD278 568 C~2lVP 2015 09 08.39268 00 30 07.131 +03 28 45.50 24.4r 15RD278 568 C~2lVP 2015 09 08.49686 00 30 06.682 +03 28 42.38 24.5r 15RD278 568 C~2lVP 2015 09 08.54047 00 30 06.489 +03 28 41.12 24.9r 15RD278 568 C~2lVP 2015 09 09.51600 00 30 02.261 +03 28 13.53 24.9w 15RD278 568 C~2lVP 2015 09 10.45696 00 29 58.164 +03 27 46.46 24.9w 15RD278 568 C~2lVP 2015 09 16.44258 00 29 31.341 +03 24 49.86 25.0w 15RD278 568 C~2lVP 2015 10 07.33735 00 27 52.769 +03 14 00.02 24.8r 15RD278 568 C~2lVP 2015 10 07.39541 00 27 52.510 +03 13 58.30 25.7r 15RD278 568 C~2lVP 2015 11 07.23400 00 25 40.361 +02 59 18.99 25.2w 15RD278 568 C~2lVP 2015 11 07.28647 00 25 40.174 +02 59 17.69 24.9w 15RD278 568 C~2lVP 2015 11 10.36441 00 25 29.524 +02 58 05.64 25.0w 15RD278 568 C~2lVP 2015 12 07.31039 00 24 27.208 +02 50 55.70 24.8w 15RD278 568 C~2lVP 2016 01 01.23954 00 24 29.064 +02 50 40.19 25.2w 15RD278 568 C~2lVP 2016 07 07.57912 00 38 23.787 +04 17 33.98 25.2w 15RD278 568 C~2lVP 2016 07 08.55858 00 38 24.196 +04 17 36.09 24.8w 15RD278 568 C~2lVP 2016 09 05.53271 00 36 18.831 +04 03 41.31 24.8w 15RD278 568 C~2lVP 2016 09 05.54486 00 36 18.796 +04 03 41.06 15RD278 568 C~2lVP 2016 09 07.47209 00 36 10.699 +04 02 48.02 25.1w 15RD278 568 C~2lVP 2016 09 07.48422 00 36 10.649 +04 02 47.78 25.2w 15RD278 568 C~2lVP 2016 09 07.51840 00 36 10.493 +04 02 46.89 24.7w 15RD278 568 C~2lVP 2016 09 07.53054 00 36 10.441 +04 02 46.40 24.9w 15RD278 568 C~2lVP 2016 09 26.54877 00 34 44.039 +03 53 19.99 25.7w 15RD278 568 C~2lVP 2016 11 03.40883 00 31 53.236 +03 34 33.58 25.3w 15RD278 568 C~2lVP 2016 11 03.47388 00 31 52.983 +03 34 31.83 24.6w 15RD278 568 C~2lVP 2016 12 25.24114 00 30 17.195 +03 23 27.72 25.2w 15RD278 568 C~2lVP 2017 01 02.28800 00 30 24.632 +03 24 07.78 25.8w 15RD278 568 C~2lVP 2017 01 29.24345 00 31 34.666 +03 31 12.14 24.7w 15RD278 568 C~2lVP 2017 09 15.44947 00 41 40.327 +04 32 55.62 24.8w 15RD278 568 C~2lVP 2017 09 22.51463 00 41 07.975 +04 29 24.46 24.6w 15RD278 568 C~2lVP
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 0.10 0.00 -0.03
2 0.0629 -646.96 0.09 -9.56 -0.06
3 0.0630 -649.01 -0.00 -9.29 0.20
4 0.1393 -2273.95 -0.05 -23.81 0.13
5 0.1396 -2281.36 -0.00 -24.03 -0.08
6 0.1397 -2284.52 -0.03 -24.05 -0.09
7 0.1424 -2353.58 -0.05 -24.43 0.11
8 0.1450 -2420.63 0.01 -25.11 0.02
9 0.1614 -2859.42 0.08 -28.96 -0.16
10 0.2186 -4472.68 -0.24 -43.39 -0.04
11 0.2187 -4476.92 0.09 -43.44 -0.08
12 0.3032 -6644.21 -0.07 -69.07 0.13
13 0.3033 -6647.30 -0.02 -69.15 0.06
14 0.3117 -6822.51 0.25 -72.25 -0.27
15 0.3855 -7851.27 -0.14 -97.91 0.08
16 0.4538 -7831.84 0.02 -123.17 -0.14
17 0.9694 5713.03 -0.03 -254.64 -0.03
18 0.9721 5719.49 -0.04 -255.10 -0.02
19 1.1336 3665.78 -0.09 -286.88 -0.02
20 1.1336 3665.20 0.17 -286.90 -0.05
21 1.1389 3532.91 -0.04 -288.09 0.01
22 1.1389 3532.13 0.03 -288.02 0.08
23 1.1390 3529.63 -0.05 -287.92 0.18
24 1.1390 3528.73 -0.10 -288.07 0.04
25 1.1911 2116.96 0.09 -300.79 0.05
26 1.2947 -676.71 -0.09 -330.07 -0.01
27 1.2949 -680.88 -0.10 -330.19 -0.10
28 1.4367 -2260.80 0.15 -375.29 0.11
29 1.4587 -2142.65 0.09 -382.38 0.14
30 1.5325 -1011.61 -0.07 -405.69 0.19
31 2.1600 8782.37 0.05 -558.05 -0.08
32 2.1794 8253.64 -0.01 -563.10 -0.23
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.
15RD278 quality flag:3 Type: 7:4EEE 7:4EEE 7:4EEE axisobj 43.964 43.976 43.953 ecceobj 0.119 0.120 0.119 incobj 2.601 2.602 2.601 qmin 37.862 37.727 38.034 qmax 49.965 50.078 49.808 amean 43.727 43.727 43.727 amin 43.338 43.333 43.326 amax 44.166 44.150 44.154 emean 0.112 0.113 0.111 emin 0.090 0.088 0.095 emax 0.133 0.135 0.129 imean 3.447 3.312 3.706 imin 2.594 2.615 2.818 imax 4.957 4.417 4.988 excite_mean 0.128 0.128 0.129 fracstop 1.000 1.000 1.000 cjmean 3.079 3.079 3.078 libcent 0 182.1 179.2 185.7 libamp 0 95.2 84.2 101.6 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 171.1 212.7 189.9 kozaiamp 179.7 179.8 180.0