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: 15RO278
# Created Sun Oct 19 01:11:06 2025
# Orbit generated from Bernstein formalism
# Fitting 34 observations of 34
# Arc: 4.36y
# First observation: 2015/06/23
# Last observation: 2019/11/01
Preliminary a, adot, b, bdot, g, gdot:
-0.000088 0.029951 -0.000009 -0.014202 0.028549 0.000000
# Chi-squared of fit: 7.91 DOF: 62 RMS: 0.09
# Min/Max residuals: -0.28 0.27
# Exact a, adot, b, bdot, g, gdot:
1.539337E-05 2.941639E-02 -7.444230E-06 -1.398062E-02 2.812901E-02 3.944250E-03
# Covariance matrix:
1.4268E-13 -1.7123E-14 -6.2881E-15 1.0472E-14 9.7166E-14 -1.5525E-13
-1.7123E-14 2.2741E-13 4.2270E-14 -1.2293E-13 1.3231E-13 2.0894E-12
-6.2881E-15 4.2270E-14 7.6346E-14 -5.0840E-14 1.7868E-14 4.5430E-13
1.0472E-14 -1.2293E-13 -5.0840E-14 9.9282E-14 -6.1545E-14 -1.2979E-12
9.7166E-14 1.3231E-13 1.7868E-14 -6.1545E-14 1.9923E-13 1.0740E-12
-1.5525E-13 2.0894E-12 4.5430E-13 -1.2979E-12 1.0740E-12 2.1993E-11
# lat0 lon0 xBary yBary zBary JD0
1.988889 8.296890 1.009724 -0.003923 0.115635 2457197.056068
# Heliocentric elements and errors
Epoch: 2457190.5000 = 2015/06/17
Mean Anomaly: 17.60150 +/- 0.020
Argument of Peri: 146.50603 +/- 0.035
Long of Asc Node: 190.86986 +/- 0.000
Inclination: 25.40445 +/- 0.000
Eccentricity: 0.23557753 +/- 0.0001
Semi-Major Axis: 45.27282062 +/- 0.0041
Time of Perihelion: 2451750.4631 +/- 6.0
Perihelion: 34.60756129 +/- 0.0058
Aphelion: 55.93807995 +/- 0.0071
Period (y) 304.6243 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 35.18494589 +/- 0.0006
Ecliptic Y 4.11147254 +/- 0.0001
Ecliptic Z 1.23359822 +/- 0.0000
Ecliptic XDOT 0.00001076 +/- 0.0000
Ecliptic YDOT 0.00288913 +/- 0.0000
Ecliptic ZDOT -0.00134655 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.44582329 +/- 0.0006
Geocenter to KBO 35.55048833 +/- 0.0006
# Hcoef: 8.69
The following table shows the complete astrometric record for 15RO278. 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 (15RO278) followed by the observatory code and reference code for the source of the astrometry.
2015 06 23.55529 00 27 20.039 +05 07 04.86 24.3r 15RO278 568 C~2lVR 2015 07 14.60008 00 27 36.928 +05 07 09.20 24.1r 15RO278 568 C~2lVR 2015 07 19.57915 00 27 34.387 +05 06 27.29 24.4r 15RO278 568 C~2lVR 2015 08 13.47170 00 26 46.546 +04 59 00.64 23.6r 15RO278 568 C~2lVR 2015 08 13.52517 00 26 46.380 +04 58 59.60 24.3r 15RO278 568 C~2lVR 2015 08 19.57540 00 26 26.766 +04 56 15.26 24.1r 15RO278 568 C~2lVR 2015 08 19.60440 00 26 26.656 +04 56 14.70 24.2r 15RO278 568 C~2lVR 2015 08 20.40889 00 26 23.866 +04 55 51.43 24.3r 15RO278 568 C~2lVR 2015 08 20.45757 00 26 23.697 +04 55 50.09 24.4r 15RO278 568 C~2lVR 2015 09 07.55453 00 25 09.760 +04 45 49.14 24.5w 15RO278 568 C~2lVR 2015 09 09.38065 00 25 01.381 +04 44 41.38 24.0r 15RO278 568 C~2lVR 2015 09 09.42501 00 25 01.174 +04 44 39.67 24.2r 15RO278 568 C~2lVR 2015 09 09.46595 00 25 00.982 +04 44 38.22 24.2r 15RO278 568 C~2lVR 2015 09 10.48959 00 24 56.212 +04 43 59.78 24.3w 15RO278 568 C~2lVR 2015 09 18.44605 00 24 17.973 +04 38 50.85 24.3w 15RO278 568 C~2lVR 2015 10 08.33404 00 22 38.419 +04 25 15.00 24.2w 15RO278 568 C~2lVR 2015 10 08.38664 00 22 38.150 +04 25 12.81 24.2w 15RO278 568 C~2lVR 2015 10 09.30372 00 22 33.605 +04 24 34.89 24.1w 15RO278 568 C~2lVR 2015 11 10.35841 00 20 14.849 +04 04 09.64 24.4w 15RO278 568 C~2lVR 2015 12 07.30512 00 19 14.979 +03 52 35.32 24.5w 15RO278 568 C~2lVR 2016 01 01.23433 00 19 25.103 +03 48 49.62 24.2w 15RO278 568 C~2lVR 2016 09 06.42437 00 32 51.729 +04 41 41.77 15RO278 568 C~2lVR 2016 09 06.46487 00 32 51.545 +04 41 40.28 15RO278 568 C~2lVR 2016 10 30.34865 00 28 33.154 +04 06 05.50 15RO278 568 C~2lVR 2016 11 03.30427 00 28 16.963 +04 03 43.11 15RO278 568 C~2lVR 2016 11 03.35669 00 28 16.759 +04 03 41.15 15RO278 568 C~2lVR 2017 01 02.26396 00 26 55.737 +03 44 58.46 24.3w 15RO278 568 C~2lVR 2017 01 29.24345 00 28 18.909 +03 49 29.60 24.0w 15RO278 568 C~2lVR 2017 09 15.44947 00 39 48.669 +04 31 35.51 24.3w 15RO278 568 C~2lVR 2017 09 22.51463 00 39 14.587 +04 26 57.64 24.1w 15RO278 568 C~2lVR 2019 11 01.27863 00 51 09.31 +03 51 44.4 24.8g 15RO278 T09 C~93VF 2019 11 01.32333 00 51 09.12 +03 51 43.0 25.2g 15RO278 T09 C~93VF 2019 11 01.34476 00 51 09.01 +03 51 42.2 25.3g 15RO278 T09 C~93VF 2019 11 01.50753 00 51 08.28 +03 51 36.5 25.2g 15RO278 T09 C~93VF
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 0.24 0.00 -0.09
2 0.0576 233.51 0.02 -95.72 0.02
3 0.0712 182.07 0.06 -119.22 -0.01
4 0.1394 -651.10 -0.23 -246.96 -0.02
5 0.1395 -653.79 -0.10 -246.94 0.27
6 0.1561 -988.00 -0.12 -281.98 -0.28
7 0.1562 -989.73 -0.10 -281.84 0.01
8 0.1584 -1037.23 -0.03 -286.72 -0.04
9 0.1585 -1040.08 0.09 -286.96 -0.02
10 0.2081 -2292.85 -0.04 -401.54 0.01
11 0.2131 -2434.72 -0.06 -414.17 0.01
12 0.2132 -2438.24 -0.04 -414.52 -0.06
13 0.2133 -2441.45 0.01 -414.71 0.00
14 0.2161 -2522.16 0.02 -421.77 0.03
15 0.2379 -3169.56 -0.03 -479.00 0.03
16 0.2923 -4860.32 0.06 -637.83 -0.02
17 0.2925 -4864.89 0.02 -638.24 -0.02
18 0.2950 -4942.37 0.05 -646.09 0.03
19 0.3828 -7336.08 0.10 -946.57 0.06
20 0.4565 -8435.82 -0.07 -1227.77 0.04
21 0.5248 -8386.52 0.07 -1495.34 -0.01
22 1.2070 3956.03 0.07 -3354.68 0.03
23 1.2071 3952.92 0.06 -3354.96 0.01
24 1.3547 -441.17 -0.03 -3794.02 -0.04
25 1.3655 -720.01 -0.06 -3829.21 0.06
26 1.3656 -723.59 0.03 -3829.81 -0.09
27 1.5297 -2281.46 -0.06 -4382.44 -0.02
28 1.6035 -1030.40 0.00 -4625.22 0.19
29 2.2311 9461.80 0.01 -6362.45 -0.03
30 2.2504 8882.67 0.10 -6418.58 0.01
31 4.3579 17967.36 -0.13 -12569.62 -0.09
32 4.3580 17964.17 0.12 -12569.80 -0.01
33 4.3581 17962.32 -0.08 -12569.89 0.03
34 4.3585 17949.93 0.03 -12570.88 0.03
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.
15RO278 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 45.747 45.762 45.733 ecceobj 0.244 0.244 0.243 incobj 25.307 25.307 25.307 qmin 33.679 33.511 33.231 qmax 57.820 58.004 58.268 amean 45.491 45.491 45.491 amin 45.080 45.089 45.095 amax 45.982 45.988 45.961 emean 0.230 0.235 0.241 emin 0.202 0.202 0.206 emax 0.258 0.261 0.269 imean 25.586 25.434 25.225 imin 24.833 24.840 24.605 imax 26.182 26.160 26.092 excite_mean 0.489 0.490 0.490 fracstop 1.000 1.000 1.000 cjmean 2.820 2.820 2.820 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 203.0 203.5 198.1 kozaiamp 180.0 179.9 179.9