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: 15RU280
# Created Wed May 8 01:17:19 2024
# Orbit generated from Bernstein formalism
# Fitting 24 observations of 24
# Arc: 1.55y
# First observation: 2015/07/14
# Last observation: 2017/01/30
Preliminary a, adot, b, bdot, g, gdot:
-0.000100 0.018314 0.000003 -0.000374 0.020687 0.000000
# Chi-squared of fit: 12.28 DOF: 42 RMS: 0.13
# Min/Max residuals: -0.27 0.28
# Exact a, adot, b, bdot, g, gdot:
1.309123E-05 1.810890E-02 -7.785543E-08 -3.725374E-04 2.059256E-02 -1.623267E-03
# Covariance matrix:
3.5270E-13 8.8022E-14 -5.5696E-15 -7.1545E-15 4.5813E-13 2.3160E-11
8.8022E-14 3.8680E-13 -5.3647E-15 -3.8188E-15 3.8292E-13 1.4996E-11
-5.5696E-15 -5.3647E-15 1.2217E-13 -1.1073E-13 -1.0674E-14 -3.9899E-13
-7.1545E-15 -3.8188E-15 -1.1073E-13 1.9845E-13 -1.5817E-14 -1.3853E-12
4.5813E-13 3.8292E-13 -1.0674E-14 -1.5817E-14 9.1800E-13 4.9396E-11
2.3160E-11 1.4996E-11 -3.9899E-13 -1.3853E-12 4.9396E-11 3.7361E-09
# lat0 lon0 xBary yBary zBary JD0
1.875712 9.112973 0.992642 0.007431 -0.223704 2457218.100869
# Heliocentric elements and errors
Epoch: 2457210.5000 = 2015/07/07
Mean Anomaly: 256.26634 +/- 0.745
Argument of Peri: 237.76928 +/- 0.672
Long of Asc Node: 246.47165 +/- 0.031
Inclination: 2.18871 +/- 0.001
Eccentricity: 0.11810751 +/- 0.0029
Semi-Major Axis: 46.89132270 +/- 0.0324
Time of Perihelion: 2491005.6482 +/- 240.3
Perihelion: 41.35310545 +/- 0.1390
Aphelion: 52.42953995 +/- 0.1408
Period (y) 321.1049 +/- 0.33
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 48.29724695 +/- 0.0022
Ecliptic Y 6.74276603 +/- 0.0003
Ecliptic Z 1.58952625 +/- 0.0001
Ecliptic XDOT -0.00059499 +/- 0.0000
Ecliptic YDOT 0.00233706 +/- 0.0000
Ecliptic ZDOT -0.00005651 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 48.79155204 +/- 0.0022
Geocenter to KBO 48.56122210 +/- 0.0023
# Hcoef: 8.74
The following table shows the complete astrometric record for 15RU280. 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 (15RU280) followed by the observatory code and reference code for the source of the astrometry.
2015 07 14.60008 00 30 31.404 +05 20 09.85 25.5r 15RU280 568 C~2nvr 2015 07 19.57915 00 30 28.497 +05 20 02.46 24.8r 15RU280 568 C~2nvr 2015 08 20.41706 00 29 30.540 +05 14 51.82 25.6r 15RU280 568 C~2nvr 2015 08 20.46647 00 29 30.400 +05 14 51.29 25.8r 15RU280 568 C~2nvr 2015 09 07.56274 00 28 32.693 +05 09 02.00 25.7w 15RU280 568 C~2nvr 2015 09 09.39169 00 28 26.165 +05 08 21.70 25.0r 15RU280 568 C~2nvr 2015 09 09.43322 00 28 26.032 +05 08 20.58 25.1r 15RU280 568 C~2nvr 2015 09 09.47414 00 28 25.882 +05 08 19.75 25.1r 15RU280 568 C~2nvr 2015 09 10.49775 00 28 22.190 +05 07 56.76 25.6w 15RU280 568 C~2nvr 2015 09 18.45683 00 27 52.557 +05 04 50.54 26.5w 15RU280 568 C~2nvr 2015 09 18.49367 00 27 52.404 +05 04 49.97 27.2w 15RU280 568 C~2nvr 2015 10 08.34456 00 26 35.201 +04 56 31.34 25.6w 15RU280 568 C~2nvr 2015 10 08.39721 00 26 34.994 +04 56 30.03 25.7w 15RU280 568 C~2nvr 2015 10 09.31421 00 26 31.438 +04 56 06.30 25.8w 15RU280 568 C~2nvr 2015 12 08.23879 00 23 47.088 +04 36 39.87 25.4w 15RU280 568 C~2nvr 2016 01 01.30142 00 23 46.295 +04 35 27.62 26.7w 15RU280 568 C~2nvr 2016 09 06.44060 00 32 28.926 +05 32 51.21 26.4w 15RU280 568 C~2nvr 2016 09 06.48188 00 32 28.754 +05 32 50.52 25.6w 15RU280 568 C~2nvr 2016 09 26.43130 00 31 13.922 +05 24 59.91 25.8w 15RU280 568 C~2nvr 2016 11 03.31006 00 28 53.478 +05 09 26.53 26.0w 15RU280 568 C~2nvr 2016 11 03.36248 00 28 53.321 +05 09 25.12 25.4w 15RU280 568 C~2nvr 2016 12 25.23477 00 27 32.045 +04 58 37.90 25.7w 15RU280 568 C~2nvr 2017 01 02.28151 00 27 37.318 +04 58 49.02 26.0w 15RU280 568 C~2nvr 2017 01 30.22034 00 28 33.971 +05 03 39.33 26.1w 15RU280 568 C~2nvr
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 0.17 0.00 -0.04
2 0.0136 -42.81 -0.24 10.34 -0.00
3 0.1008 -960.80 0.05 66.55 -0.07
4 0.1009 -962.93 0.16 66.89 0.18
5 0.1505 -1892.89 -0.11 86.53 -0.05
6 0.1555 -1998.41 -0.27 88.06 0.19
7 0.1556 -2000.68 -0.09 87.81 -0.10
8 0.1557 -2003.06 -0.05 87.94 -0.03
9 0.1585 -2062.82 0.05 88.62 -0.06
10 0.1803 -2543.17 0.20 92.60 -0.14
11 0.1804 -2545.49 0.19 92.98 0.21
12 0.2348 -3802.56 0.05 91.48 0.07
13 0.2349 -3805.92 0.07 91.50 0.09
14 0.2374 -3864.14 -0.16 90.75 -0.17
15 0.4015 -6583.73 0.07 -6.44 -0.06
16 0.4674 -6623.32 -0.08 -68.08 -0.02
17 1.1495 1912.96 0.16 8.15 -0.24
18 1.1496 1910.33 -0.10 8.53 0.09
19 1.2042 697.89 -0.00 16.17 -0.02
20 1.3079 -1597.93 -0.16 -13.63 0.28
21 1.3080 -1600.64 -0.08 -14.00 -0.03
22 1.4501 -2972.13 0.04 -128.47 0.04
23 1.4721 -2895.34 0.10 -149.42 -0.09
24 1.5486 -2002.87 0.03 -217.43 -0.02
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.
15RU280 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 47.361 47.450 47.280 ecceobj 0.114 0.122 0.105 incobj 2.186 2.186 2.186 qmin 40.738 40.341 41.085 qmax 53.841 54.424 53.388 amean 47.112 47.189 47.031 amin 46.709 46.780 46.644 amax 47.560 47.643 47.471 emean 0.119 0.127 0.110 emin 0.106 0.114 0.097 emax 0.132 0.142 0.125 imean 3.662 3.662 3.663 imin 3.276 3.268 3.297 imax 4.036 4.045 4.032 excite_mean 0.135 0.142 0.128 fracstop 1.000 1.000 1.000 cjmean 3.118 3.116 3.119 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 177.7 177.5 178.4 kozaiamp 179.9 180.0 180.0