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: 15RU278
# Created Sun Nov 24 02:10:24 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 38 observations of 38
# Arc: 9.22y
# First observation: 2015/07/14
# Last observation: 2024/10/01
# Chi-squared of fit: 5.02 DOF: 70 RMS: 0.06
# Min/Max residuals: -0.20 0.29
# Exact a, adot, b, bdot, g, gdot:
1.343465E-05 1.857321E-02 -6.384219E-06 -9.444428E-03 2.189230E-02 -4.438700E-03
# Covariance matrix:
1.1740E-13 -2.7243E-14 -9.5811E-15 1.1968E-14 6.9886E-14 -1.2259E-13
-2.7243E-14 9.2071E-14 2.8402E-14 -4.7654E-14 5.7083E-14 5.1244E-13
-9.5811E-15 2.8402E-14 6.0826E-14 -2.5014E-14 1.4066E-14 1.6987E-13
1.1968E-14 -4.7654E-14 -2.5014E-14 3.2375E-14 -2.8990E-14 -2.8401E-13
6.9886E-14 5.7083E-14 1.4066E-14 -2.8990E-14 1.4527E-13 3.1976E-13
-1.2259E-13 5.1244E-13 1.6987E-13 -2.8401E-13 3.1976E-13 3.0526E-12
# lat0 lon0 xBary yBary zBary JD0
3.318665 12.906688 1.005394 0.009187 -0.156687 2457218.059119
# Heliocentric elements and errors
Epoch: 2457218.5000 = 2015/07/15
Mean Anomaly: 305.93693 +/- 0.008
Argument of Peri: 253.76498 +/- 0.012
Long of Asc Node: 198.09037 +/- 0.000
Inclination: 27.24822 +/- 0.000
Eccentricity: 0.24738564 +/- 0.0001
Semi-Major Axis: 50.72018984 +/- 0.0042
Time of Perihelion: 2477032.3055 +/- 14.2
Perihelion: 38.17274326 +/- 0.0055
Aphelion: 63.26763643 +/- 0.0069
Period (y) 361.2264 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 44.82342139 +/- 0.0008
Ecliptic Y 9.24112649 +/- 0.0002
Ecliptic Z 2.64403586 +/- 0.0000
Ecliptic XDOT -0.00099463 +/- 0.0000
Ecliptic YDOT 0.00214929 +/- 0.0000
Ecliptic ZDOT -0.00121121 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.84259088 +/- 0.0008
Geocenter to KBO 45.67833142 +/- 0.0008
# Hcoef: 6.78
The following table shows the complete astrometric record for 15RU278. 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 (15RU278) followed by the observatory code and reference code for the source of the astrometry.
2015 07 14.55833 00 42 16.502 +08 09 09.85 23.4r 15RU278 568 C~2lVR 2015 07 19.53712 00 42 15.256 +08 08 56.69 23.3r 15RU278 568 C~2lVR 2015 08 13.50040 00 41 40.868 +08 04 41.59 23.6r 15RU278 568 C~2lVR 2015 08 19.56300 00 41 26.040 +08 02 54.47 23.4r 15RU278 568 C~2lVR 2015 08 19.63315 00 41 25.863 +08 02 52.98 23.3r 15RU278 568 C~2lVR 2015 08 20.43842 00 41 23.716 +08 02 37.60 23.4r 15RU278 568 C~2lVR 2015 08 20.48765 00 41 23.577 +08 02 36.65 23.2r 15RU278 568 C~2lVR 2015 09 07.58494 00 40 26.380 +07 55 39.98 23.6w 15RU278 568 C~2lVR 2015 09 09.41265 00 40 19.798 +07 54 51.48 23.3r 15RU278 568 C~2lVR 2015 09 09.45371 00 40 19.641 +07 54 50.41 23.3r 15RU278 568 C~2lVR 2015 09 09.49464 00 40 19.492 +07 54 49.31 23.1r 15RU278 568 C~2lVR 2015 09 10.51893 00 40 15.739 +07 54 21.54 23.7w 15RU278 568 C~2lVR 2015 09 18.48318 00 39 45.443 +07 50 36.00 23.6w 15RU278 568 C~2lVR 2015 10 08.37093 00 38 24.960 +07 40 18.62 23.4w 15RU278 568 C~2lVS 2015 10 08.42353 00 38 24.740 +07 40 16.93 23.3w 15RU278 568 C~2lVS 2015 10 09.34050 00 38 21.004 +07 39 47.43 23.3w 15RU278 568 C~2lVS 2015 11 10.46704 00 36 22.269 +07 23 08.64 23.5w 15RU278 568 C~2lVS 2016 01 02.27875 00 35 18.043 +07 07 36.96 23.7w 15RU278 568 C~2lVS 2016 07 07.58323 00 47 04.011 +08 04 06.28 23.8w 15RU278 568 C~2lVS 2016 07 08.56262 00 47 04.509 +08 04 07.71 23.7w 15RU278 568 C~2lVS 2016 09 05.48236 00 45 24.860 +07 51 08.15 23.5w 15RU278 568 C~2lVS 2016 09 05.57499 00 45 24.531 +07 51 05.74 23.5w 15RU278 568 C~2lVS 2016 09 06.43656 00 45 21.519 +07 50 43.27 23.5w 15RU278 568 C~2lVS 2016 09 06.47701 00 45 21.370 +07 50 42.17 23.6w 15RU278 568 C~2lVS 2016 09 06.52410 00 45 21.203 +07 50 41.03 23.4w 15RU278 568 C~2lVS 2016 09 06.56619 00 45 21.050 +07 50 39.89 23.4w 15RU278 568 C~2lVS 2016 09 26.43941 00 44 04.702 +07 41 05.54 23.4w 15RU278 568 C~2lVS 2016 11 04.28877 00 41 32.001 +07 20 39.27 24.0w 15RU278 568 C~2lVS 2016 11 04.34801 00 41 31.791 +07 20 37.56 23.9w 15RU278 568 C~2lVS 2016 12 29.29357 00 40 02.367 +07 02 50.42 23.3w 15RU278 568 C~2lVS 2017 01 02.32887 00 40 05.197 +07 02 29.56 23.8w 15RU278 568 C~2lVS 2017 09 16.52330 00 49 41.771 +07 40 47.69 23.9w 15RU278 568 C~2lVS 2017 09 22.47675 00 49 18.419 +07 37 51.00 23.4w 15RU278 568 C~2lVS 2017 11 22.34591 00 45 33.175 +07 07 14.61 23.6w 15RU278 568 C~2lVS 2017 12 23.28322 00 44 51.061 +06 58 20.62 23.9w 15RU278 568 C~2lVS 2024 10 01.377230 01 24 45.050 +06 48 33.83 23.1G 15RU278 G37 C~8HAJ 2024 10 01.420840 01 24 44.861 +06 48 32.51 15RU278 G37 C~8HAJ 2024 10 01.465000 01 24 44.690 +06 48 31.05 15RU278 G37 C~8HAJ
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 0.03 0.00 -0.08
2 0.0136 0.00 -0.02 0.00 -0.02
3 0.0820 0.00 -0.20 0.00 -0.04
4 0.0986 0.00 0.10 0.00 0.01
5 0.0988 0.00 0.29 0.00 -0.14
6 0.1010 0.00 0.04 0.00 -0.03
7 0.1011 0.00 -0.02 0.00 -0.03
8 0.1507 0.00 0.00 0.00 -0.04
9 0.1557 0.00 -0.01 0.00 0.04
10 0.1558 0.00 -0.08 0.00 0.07
11 0.1559 0.00 -0.03 0.00 0.07
12 0.1587 0.00 -0.02 0.00 0.01
13 0.1805 0.00 -0.00 0.00 -0.05
14 0.2349 0.00 -0.03 0.00 -0.01
15 0.2351 0.00 -0.05 0.00 -0.01
16 0.2376 0.00 -0.01 0.00 0.01
17 0.3256 0.00 0.11 0.00 0.04
18 0.4701 0.00 0.05 0.00 -0.07
19 0.9830 0.00 0.04 0.00 -0.00
20 0.9856 0.00 -0.04 0.00 0.05
21 1.1470 0.00 0.03 0.00 0.04
22 1.1472 0.00 0.05 0.00 0.03
23 1.1496 0.00 0.03 0.00 0.01
24 1.1497 0.00 -0.02 0.00 -0.03
25 1.1498 0.00 0.02 0.00 0.07
26 1.1499 0.00 0.00 0.00 0.03
27 1.2043 0.00 0.02 0.00 0.02
28 1.3107 0.00 0.01 0.00 0.02
29 1.3109 0.00 -0.04 0.00 0.06
30 1.4613 0.00 -0.06 0.00 -0.07
31 1.4723 0.00 -0.05 0.00 0.01
32 2.1765 0.00 0.03 0.00 0.03
33 2.1928 0.00 0.00 0.00 0.05
34 2.3594 0.00 0.10 0.00 0.12
35 2.4441 0.00 -0.01 0.00 0.01
36 9.2178 0.00 -0.02 0.00 -0.05
37 9.2180 0.00 -0.11 0.00 0.02
38 9.2181 0.00 0.10 0.00 -0.04
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.
15RU278 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 51.248 51.318 51.180 ecceobj 0.249 0.252 0.247 incobj 27.108 27.108 27.108 qmin 37.525 37.510 37.621 qmax 64.899 65.025 64.606 amean 50.928 50.893 50.848 amin 50.439 50.398 50.363 amax 51.516 51.554 51.405 emean 0.244 0.241 0.240 emin 0.229 0.221 0.222 emax 0.261 0.261 0.258 imean 27.442 27.459 27.427 imin 27.037 27.044 27.111 imax 27.777 28.045 27.913 excite_mean 0.521 0.520 0.519 fracstop 1.000 1.000 1.000 cjmean 2.830 2.831 2.832 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 182.3 177.1 175.5 kozaiamp 180.0 179.9 179.9