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: 15RA278
# Created Sat Apr 20 01:17:28 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:
-0.000090 0.025953 -0.000017 -0.005112 0.024406 0.000000
# Chi-squared of fit: 5.61 DOF: 48 RMS: 0.08
# Min/Max residuals: -0.16 0.24
# Exact a, adot, b, bdot, g, gdot:
1.649402E-05 2.581897E-02 -3.207092E-06 -5.138733E-03 2.433627E-02 8.218875E-03
# Covariance matrix:
1.9160E-13 3.7374E-14 1.6948E-15 -2.2398E-14 1.6373E-13 2.2294E-12
3.7374E-14 5.0464E-13 2.1043E-14 -1.2289E-13 3.5700E-13 1.2028E-11
1.6948E-15 2.1043E-14 1.0839E-13 -8.0255E-14 1.3637E-14 7.0362E-13
-2.2398E-14 -1.2289E-13 -8.0255E-14 1.3955E-13 -9.4858E-14 -3.8675E-12
1.6373E-13 3.5700E-13 1.3637E-14 -9.4858E-14 3.9571E-13 9.3299E-12
2.2294E-12 1.2028E-11 7.0362E-13 -3.8675E-12 9.3299E-12 3.7784E-10
# lat0 lon0 xBary yBary zBary JD0
2.280203 12.007662 1.002792 0.006976 -0.172653 2457218.063999
# Heliocentric elements and errors
Epoch: 2457210.5000 = 2015/07/07
Mean Anomaly: 22.66465 +/- 0.029
Argument of Peri: 112.17154 +/- 0.064
Long of Asc Node: 201.99407 +/- 0.001
Inclination: 11.36131 +/- 0.001
Eccentricity: 0.42486710 +/- 0.0008
Semi-Major Axis: 62.25806279 +/- 0.0502
Time of Perihelion: 2445914.1456 +/- 5.1
Perihelion: 35.80665995 +/- 0.0558
Aphelion: 88.70946563 +/- 0.0860
Period (y) 491.2489 +/- 0.59
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 40.53407525 +/- 0.0010
Ecliptic Y 7.59737010 +/- 0.0002
Ecliptic Z 1.63478664 +/- 0.0000
Ecliptic XDOT 0.00031960 +/- 0.0000
Ecliptic YDOT 0.00303181 +/- 0.0000
Ecliptic ZDOT -0.00054080 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.27231295 +/- 0.0010
Geocenter to KBO 41.09093710 +/- 0.0011
# Hcoef: 9.18
The following table shows the complete astrometric record for 15RA278. 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 (15RA278) followed by the observatory code and reference code for the source of the astrometry.
2015 07 14.56321 00 40 34.993 +06 50 43.80 25.9r 15RA278 568 C~2lVO 2015 07 19.54121 00 40 33.909 +06 50 39.02 25.1r 15RA278 568 C~2lVO 2015 08 13.49630 00 39 57.446 +06 46 50.51 24.9r 15RA278 568 C~2lVO 2015 08 20.43431 00 39 38.912 +06 44 49.95 24.9r 15RA278 568 C~2lVO 2015 08 20.48358 00 39 38.778 +06 44 49.11 25.2r 15RA278 568 C~2lVO 2015 09 07.58083 00 38 36.864 +06 37 56.75 25.7w 15RA278 568 C~2lVO 2015 09 09.40852 00 38 29.717 +06 37 08.54 25.1r 15RA278 568 C~2lVO 2015 09 09.44963 00 38 29.553 +06 37 07.46 25.0r 15RA278 568 C~2lVO 2015 09 09.49055 00 38 29.393 +06 37 06.31 25.1r 15RA278 568 C~2lVO 2015 09 10.51481 00 38 25.328 +06 36 38.81 25.4w 15RA278 568 C~2lVP 2015 10 08.36567 00 36 25.514 +06 22 43.75 25.0w 15RA278 568 C~2lVP 2015 10 08.41827 00 36 25.270 +06 22 41.98 25.7w 15RA278 568 C~2lVP 2015 10 09.33526 00 36 21.244 +06 22 13.09 25.8w 15RA278 568 C~2lVP 2015 11 10.46169 00 34 14.188 +06 06 16.62 26.1w 15RA278 568 C~2lVP 2015 12 08.25986 00 33 11.717 +05 56 49.76 25.4w 15RA278 568 C~2lVP 2016 01 01.32225 00 33 10.823 +05 54 05.46 25.8w 15RA278 568 C~2lVP 2016 09 05.50664 00 44 42.007 +06 57 10.85 25.2w 15RA278 568 C~2lVP 2016 09 06.46082 00 44 38.439 +06 56 46.57 26.3w 15RA278 568 C~2lVP 2016 09 06.50211 00 44 38.289 +06 56 45.73 26.0w 15RA278 568 C~2lVP 2016 09 26.45968 00 43 16.169 +06 47 23.43 24.9w 15RA278 568 C~2lVP 2016 11 04.27703 00 40 33.397 +06 27 45.32 25.8w 15RA278 568 C~2lVP 2016 11 04.33644 00 40 33.186 +06 27 43.58 26.4w 15RA278 568 C~2lVP 2016 12 29.27436 00 39 02.388 +06 12 54.94 25.1w 15RA278 568 C~2lVP 2017 01 03.24627 00 39 07.027 +06 12 54.19 25.7w 15RA278 568 C~2lVP 2017 09 16.51398 00 49 55.166 +07 10 33.69 25.4w 15RA278 568 C~2lVP 2017 09 22.46739 00 49 30.431 +07 07 44.47 25.5w 15RA278 568 C~2lVP 2017 12 23.28322 00 44 49.891 +06 31 36.79 26.0w 15RA278 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 0.06 0.00 -0.03
2 0.0136 -16.73 -0.07 1.93 -0.12
3 0.0820 -605.92 -0.03 4.61 -0.05
4 0.1009 -907.17 -0.16 2.00 0.04
5 0.1011 -909.33 0.05 2.01 0.05
6 0.1506 -1919.60 0.13 -15.16 -0.11
7 0.1556 -2036.48 -0.06 -17.67 0.10
8 0.1557 -2039.15 -0.03 -17.70 0.10
9 0.1559 -2041.79 0.02 -17.82 0.02
10 0.1587 -2108.30 0.07 -19.32 0.07
11 0.2349 -4078.96 0.12 -84.70 -0.06
12 0.2351 -4083.00 -0.03 -84.90 -0.12
13 0.2376 -4149.57 0.07 -87.82 -0.08
14 0.3255 -6269.14 -0.02 -219.88 0.24
15 0.4016 -7350.33 -0.02 -372.71 -0.01
16 0.4675 -7427.62 -0.08 -518.46 0.04
17 1.1470 3537.41 -0.11 -1081.65 0.05
18 1.1496 3479.00 -0.05 -1083.29 -0.12
19 1.1497 3476.61 0.16 -1083.20 0.02
20 1.2044 2130.91 0.02 -1123.61 -0.07
21 1.3106 -562.08 -0.04 -1258.93 0.05
22 1.3108 -565.65 0.04 -1259.30 -0.09
23 1.4612 -2159.49 -0.03 -1545.85 0.00
24 1.4748 -2096.16 -0.05 -1573.69 0.10
25 2.1765 8148.90 -0.09 -2154.47 -0.00
26 2.1928 7743.33 0.03 -2167.79 -0.08
27 2.4441 3047.41 0.10 -2540.37 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.
15RA278 quality flag:3 Type: 3:1EE 3:1EE 3:1EE axisobj 63.262 63.415 63.111 ecceobj 0.433 0.435 0.431 incobj 11.318 11.318 11.318 qmin 34.248 35.062 34.146 qmax 92.741 92.064 92.926 amean 62.630 62.628 62.630 amin 61.738 61.692 61.723 amax 63.895 63.879 63.858 emean 0.438 0.429 0.438 emin 0.419 0.417 0.417 emax 0.453 0.442 0.456 imean 10.155 11.456 10.009 imin 9.297 11.240 8.844 imax 11.605 11.626 11.603 excite_mean 0.472 0.473 0.471 fracstop 1.000 1.000 1.000 cjmean 3.033 3.034 3.034 libcent 0 81.9 180.4 80.7 libamp 0 44.5 152.9 43.2 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 143.7 175.7 134.5 kozaiamp 42.1 180.0 32.5