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: 15RQ278
# Created Fri Nov 22 02:10:27 2024
# Orbit generated from Bernstein formalism
# Fitting 22 observations of 22
# Arc: 2.42y
# First observation: 2015/06/23
# Last observation: 2017/11/22
Preliminary a, adot, b, bdot, g, gdot:
-0.000035 0.020655 -0.000006 0.006674 0.022778 0.000000
# Chi-squared of fit: 9.68 DOF: 38 RMS: 0.12
# Min/Max residuals: -0.40 0.20
# Exact a, adot, b, bdot, g, gdot:
1.424994E-05 2.011228E-02 4.480143E-06 6.525972E-03 2.227780E-02 -1.621444E-03
# Covariance matrix:
2.6329E-13 1.3499E-13 -3.7900E-14 8.7489E-14 3.3269E-13 5.6976E-12
1.3499E-13 8.7709E-13 -1.3369E-13 3.5541E-13 9.5020E-13 2.3061E-11
-3.7900E-14 -1.3369E-13 1.8413E-13 -1.6518E-13 -1.6059E-13 -4.1408E-12
8.7489E-14 3.5541E-13 -1.6518E-13 2.8557E-13 4.0878E-13 1.1612E-11
3.3269E-13 9.5020E-13 -1.6059E-13 4.0878E-13 1.2280E-12 2.6553E-11
5.6976E-12 2.3061E-11 -4.1408E-12 1.1612E-11 2.6553E-11 7.5251E-10
# lat0 lon0 xBary yBary zBary JD0
3.223564 9.644234 1.006652 -0.007778 0.139727 2457197.024748
# Heliocentric elements and errors
Epoch: 2457190.5000 = 2015/06/17
Mean Anomaly: 288.89123 +/- 0.043
Argument of Peri: 92.81534 +/- 0.109
Long of Asc Node: 358.58115 +/- 0.001
Inclination: 18.40714 +/- 0.001
Eccentricity: 0.10184188 +/- 0.0013
Semi-Major Axis: 45.82411947 +/- 0.0143
Time of Perihelion: 2479570.5091 +/- 8.7
Perihelion: 41.15730477 +/- 0.0614
Aphelion: 50.49093418 +/- 0.0621
Period (y) 310.2054 +/- 0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 44.21046151 +/- 0.0022
Ecliptic Y 6.49274607 +/- 0.0004
Ecliptic Z 2.52439420 +/- 0.0001
Ecliptic XDOT -0.00065715 +/- 0.0000
Ecliptic YDOT 0.00238966 +/- 0.0000
Ecliptic ZDOT 0.00078961 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.75592949 +/- 0.0022
Geocenter to KBO 44.88773088 +/- 0.0022
# Hcoef: 8.39
The following table shows the complete astrometric record for 15RQ278. 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 (15RQ278) followed by the observatory code and reference code for the source of the astrometry.
2015 06 23.52397 00 30 20.706 +06 47 02.28 24.9r 15RQ278 568 C~2lVR 2015 07 19.58735 00 30 24.045 +06 51 13.30 24.4r 15RQ278 568 C~2lVR 2015 08 20.42114 00 29 17.755 +06 48 30.39 24.7r 15RQ278 568 C~2lVR 2015 08 20.47056 00 29 17.584 +06 48 29.83 24.8r 15RQ278 568 C~2lVR 2015 09 09.39585 00 28 05.446 +06 43 03.04 25.1r 15RQ278 568 C~2lVR 2015 09 09.43729 00 28 05.279 +06 43 02.25 24.8r 15RQ278 568 C~2lVR 2015 09 09.47825 00 28 05.112 +06 43 01.44 25.2r 15RQ278 568 C~2lVR 2015 09 10.50253 00 28 00.971 +06 42 40.94 24.8w 15RQ278 568 C~2lVR 2015 09 18.46210 00 27 27.758 +06 39 52.36 24.7w 15RQ278 568 C~2lVR 2015 10 09.31945 00 25 57.097 +06 31 41.67 25.1w 15RQ278 568 C~2lVR 2016 09 05.59522 00 32 02.805 +07 33 07.94 25.1w 15RQ278 568 C~2lVR 2016 09 06.54431 00 31 59.081 +07 32 50.41 25.0w 15RQ278 568 C~2lVR 2016 09 06.58642 00 31 58.908 +07 32 49.61 25.6w 15RQ278 568 C~2lVR 2016 09 27.50093 00 30 30.740 +07 25 23.28 24.9w 15RQ278 568 C~2lVR 2016 11 03.31592 00 27 58.286 +07 10 46.85 25.2w 15RQ278 568 C~2lVR 2016 11 03.36828 00 27 58.089 +07 10 45.57 25.4w 15RQ278 568 C~2lVR 2016 12 25.22839 00 26 25.556 +07 00 11.60 24.8w 15RQ278 568 C~2lVR 2017 01 02.27514 00 26 30.809 +07 00 30.83 26.0w 15RQ278 568 C~2lVR 2017 01 29.23654 00 27 27.908 +07 05 57.48 25.2w 15RQ278 568 C~2lVR 2017 09 16.48602 00 35 06.569 +08 18 52.03 24.8w 15RQ278 568 C~2lVR 2017 09 22.43395 00 34 41.099 +08 16 43.38 24.9w 15RQ278 568 C~2lVR 2017 11 22.34963 00 30 45.986 +07 53 47.12 25.1w 15RQ278 568 C~2lVR
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 0.01 0.00 0.03
2 0.0714 144.82 -0.01 210.98 0.07
3 0.1585 -826.50 0.20 451.46 -0.09
4 0.1586 -829.06 0.04 451.96 0.04
5 0.2132 -1945.27 -0.05 577.05 0.11
6 0.2133 -1947.87 -0.00 577.31 0.12
7 0.2134 -1950.47 0.02 577.55 0.11
8 0.2162 -2015.24 0.08 583.16 0.00
9 0.2380 -2536.41 -0.40 624.40 -0.38
10 0.2951 -3971.52 0.10 709.79 0.02
11 1.2048 2487.52 0.09 1942.05 0.01
12 1.2074 2429.70 -0.02 1947.76 0.01
13 1.2076 2427.02 -0.09 1948.04 0.02
14 1.2648 1045.88 -0.07 2055.11 0.13
15 1.3656 -1384.23 0.16 2147.16 -0.01
16 1.3658 -1387.43 0.01 2147.14 -0.09
17 1.5077 -2903.53 0.14 2111.25 -0.05
18 1.5298 -2824.09 -0.16 2097.86 -0.17
19 1.6036 -1914.08 -0.03 2060.61 -0.05
20 2.2340 6078.88 -0.06 3392.53 0.10
21 2.2503 5680.31 0.04 3422.53 -0.08
22 2.4170 1926.95 0.01 3531.45 0.12
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.
15RQ278 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 46.275 46.310 46.241 ecceobj 0.103 0.106 0.100 incobj 18.313 18.313 18.312 qmin 40.723 40.608 40.867 qmax 51.606 51.757 51.409 amean 46.010 46.050 45.983 amin 45.633 45.675 45.615 amax 46.419 46.451 46.384 emean 0.099 0.102 0.096 emin 0.088 0.091 0.085 emax 0.112 0.115 0.108 imean 18.795 18.801 18.795 imin 18.472 18.472 18.473 imax 19.051 19.068 19.047 excite_mean 0.337 0.338 0.336 fracstop 1.000 1.000 1.000 cjmean 2.983 2.982 2.983 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 175.6 175.6 175.9 kozaiamp 180.0 179.9 180.0