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: 15RY345 # Created Fri Nov 22 02:10:29 2024 # Orbit generated from Bernstein formalism # Fitting 13 observations of 13 # Arc: 3.89y # First observation: 2015/01/13 # Last observation: 2018/12/02 Preliminary a, adot, b, bdot, g, gdot: -0.000210 0.022283 0.000178 0.002079 0.024282 0.000000 # Chi-squared of fit: 5.49 DOF: 20 RMS: 0.11 # Min/Max residuals: -0.19 0.25 # Exact a, adot, b, bdot, g, gdot: 1.424775E-05 2.176593E-02 1.851412E-06 2.030585E-03 2.340248E-02 -9.130930E-04 # Covariance matrix: 9.6244E-13 -8.2304E-13 -1.5503E-13 1.1786E-14 -4.1635E-13 -6.7493E-12 -8.2304E-13 1.1138E-12 1.6698E-14 -3.0501E-14 1.9597E-13 9.9492E-12 -1.5503E-13 1.6698E-14 4.5316E-13 -1.2937E-13 2.4208E-13 2.6254E-13 1.1786E-14 -3.0501E-14 -1.2937E-13 8.3794E-14 8.3716E-15 -2.8824E-13 -4.1635E-13 1.9597E-13 2.4208E-13 8.3716E-15 5.1173E-13 2.0920E-12 -6.7493E-12 9.9492E-12 2.6254E-13 -2.8824E-13 2.0920E-12 9.6068E-11 # lat0 lon0 xBary yBary zBary JD0 -34.747832 10.270264 -0.960498 0.115848 0.166655 2457035.589248 # Heliocentric elements and errors Epoch: 2457030.5000 = 2015/01/08 Mean Anomaly: 200.32602 +/- 0.347 Argument of Peri: 80.79991 +/- 0.346 Long of Asc Node: 91.14348 +/- 0.001 Inclination: 35.36889 +/- 0.000 Eccentricity: 0.06430570 +/- 0.0002 Semi-Major Axis: 40.13437483 +/- 0.0045 Time of Perihelion: 2498221.7378 +/- 89.2 Perihelion: 37.55350561 +/- 0.0087 Aphelion: 42.71524405 +/- 0.0090 Period (y) 254.2629 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 34.17385992 +/- 0.0010 Ecliptic Y 7.17019471 +/- 0.0002 Ecliptic Z -24.35492582 +/- 0.0008 Ecliptic XDOT -0.00041104 +/- 0.0000 Ecliptic YDOT 0.00250877 +/- 0.0000 Ecliptic ZDOT 0.00025618 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.57260628 +/- 0.0009 Geocenter to KBO 42.73051781 +/- 0.0013 # Hcoef: 7.26
The following table shows the complete astrometric record for 15RY345. 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 (15RY345) followed by the observatory code and reference code for the source of the astrometry.
2015 01 13.08847 01 36 16.433 -27 41 17.66 23.4i 15RY345 W84 C~55Wr 2015 09 13.32593 01 48 34.410 -27 13 16.22 24.4r 15RY345 W84 C~55Wr 2015 10 17.26003 01 45 55.832 -27 32 19.51 23.5r 15RY345 W84 C~55Wr 2015 11 05.20624 01 44 18.316 -27 36 04.77 22.9r 15RY345 W84 C~55Wr 2015 11 06.24157 01 44 13.165 -27 36 07.14 24.0g 15RY345 W84 C~55Wr 2015 12 03.12917 01 42 15.682 -27 30 44.54 23.9r 15RY345 W84 C~55Wr 2016 09 30.38118 01 52 06.112 -26 42 59.78 23.5i 15RY345 W84 C~55Wr 2016 10 02.30283 01 51 56.952 -26 44 04.61 22.9g 15RY345 W84 C~55Wr 2016 10 05.25715 01 51 42.643 -26 45 38.65 23.9g 15RY345 W84 C~55Wr 2016 11 04.15484 01 49 09.904 -26 54 37.68 23.7r 15RY345 W84 C~55Wr 2017 11 24.22538 01 52 23.305 -26 10 52.71 23.8r 15RY345 W84 C~55Wr 2018 09 19.34728 02 02 24.496 -25 09 43.14 23.9r 15RY345 W84 C~55Wr 2018 12 02.11752 01 56 35.160 -25 26 11.23 23.2r 15RY345 W84 C~55Wr
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 0.09 0.00 -0.10
2 0.6659 9525.68 0.10 -2954.28 -0.01
3 0.7589 7120.05 -0.05 -2992.35 -0.12
4 0.8107 5862.78 -0.15 -2598.20 0.25
5 0.8136 5800.72 0.01 -2569.03 -0.01
6 0.8872 4554.87 -0.07 -1570.86 0.10
7 1.7147 12886.77 -0.01 -2670.98 0.01
8 1.7200 12747.43 -0.19 -2670.47 -0.08
9 1.7280 12533.23 0.25 -2663.38 -0.12
10 1.8099 10467.18 -0.07 -2183.26 0.06
11 2.8642 14001.05 0.15 -1075.67 0.01
12 3.6831 22966.50 -0.00 -1750.80 0.16
13 3.8851 18292.76 -0.07 -324.02 -0.15
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.
15RY345 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 40.462 40.477 40.448 ecceobj 0.055 0.055 0.056 incobj 35.381 35.381 35.381 qmin 37.297 37.351 37.307 qmax 43.429 43.471 43.392 amean 40.270 40.285 40.245 amin 39.967 39.978 39.930 amax 40.577 40.604 40.561 emean 0.059 0.059 0.057 emin 0.048 0.048 0.046 emax 0.071 0.071 0.070 imean 33.795 33.794 33.798 imin 33.504 33.494 33.501 imax 34.100 34.100 34.120 excite_mean 0.559 0.559 0.559 fracstop 1.000 1.000 1.000 cjmean 2.667 2.667 2.667 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 188.2 185.7 186.6 kozaiamp 180.0 179.9 180.0