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: 17BD241 # Created Sun Dec 22 02:10:56 2024 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 2.02y # First observation: 2017/01/28 # Last observation: 2019/02/04 Preliminary a, adot, b, bdot, g, gdot: -0.000005 0.020878 0.000006 0.007493 0.023135 0.000000 # Chi-squared of fit: 8.30 DOF: 30 RMS: 0.12 # Min/Max residuals: -0.20 0.33 # Exact a, adot, b, bdot, g, gdot: 1.428225E-05 2.108996E-02 4.776685E-06 7.576141E-03 2.336931E-02 3.517238E-03 # Covariance matrix: 1.7880E-13 -2.5597E-13 3.6861E-15 -4.6971E-14 9.1834E-14 -3.2016E-12 -2.5597E-13 1.9066E-12 -6.8511E-14 6.0187E-13 2.7274E-13 4.2989E-11 3.6861E-15 -6.8511E-14 1.3069E-13 -1.2079E-13 -1.9922E-14 -1.7917E-12 -4.6971E-14 6.0187E-13 -1.2079E-13 4.1719E-13 1.2747E-13 1.5402E-11 9.1834E-14 2.7274E-13 -1.9922E-14 1.2747E-13 4.2642E-13 9.6044E-12 -3.2016E-12 4.2989E-11 -1.7917E-12 1.5402E-11 9.6044E-12 1.1037E-09 # lat0 lon0 xBary yBary zBary JD0 -12.529908 153.362051 0.418799 -0.193519 -0.871563 2457782.004921 # Heliocentric elements and errors Epoch: 2457780.5000 = 2017/01/27 Mean Anomaly: 64.60332 +/- 0.092 Argument of Peri: 245.43504 +/- 0.057 Long of Asc Node: 183.76330 +/- 0.002 Inclination: 22.92739 +/- 0.001 Eccentricity: 0.15205346 +/- 0.0015 Semi-Major Axis: 45.70539775 +/- 0.0266 Time of Perihelion: 2437526.9113 +/- 22.9 Perihelion: 38.75573398 +/- 0.0729 Aphelion: 52.65506153 +/- 0.0758 Period (y) 309.0007 +/- 0.27 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -37.95209850 +/- 0.0010 Ecliptic Y 19.49851146 +/- 0.0005 Ecliptic Z -9.28333093 +/- 0.0003 Ecliptic XDOT -0.00163659 +/- 0.0000 Ecliptic YDOT -0.00194857 +/- 0.0000 Ecliptic ZDOT 0.00077699 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.66616497 +/- 0.0009 Geocenter to KBO 42.79116631 +/- 0.0012 # Hcoef: 8.49
The following table shows the complete astrometric record for 17BD241. 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 (17BD241) followed by the observatory code and reference code for the source of the astrometry.
2017 01 28.50412 10 03 09.69 -01 25 47.0 25.4z 17BD241 T09 C~86ul 2017 01 28.52030 10 03 09.62 -01 25 46.9 24.4z 17BD241 T09 C~86ul 2017 01 28.54708 10 03 09.50 -01 25 46.2 24.9z 17BD241 T09 C~86ul 2017 01 28.54976 10 03 09.50 -01 25 46.4 24.9z 17BD241 T09 C~86ul 2017 01 28.56057 10 03 09.45 -01 25 46.0 24.6z 17BD241 T09 C~86ul 2017 02 02.39300 10 02 49.35 -01 24 05.5 24.9r 17BD241 T09 C~86ul 2017 02 02.40846 10 02 49.30 -01 24 05.3 25.0r 17BD241 T09 C~86ul 2017 02 02.42388 10 02 49.22 -01 24 04.8 24.6r 17BD241 T09 C~86ul 2017 03 29.249175 09 59 05.80 -00 56 35.8 17BD241 T09 C~86ul 2017 03 29.261742 09 59 05.76 -00 56 35.4 17BD241 T09 C~86ul 2017 04 28.317591 09 58 03.11 -00 41 19.5 17BD241 T09 C~86ul 2017 04 28.332402 09 58 03.11 -00 41 19.1 17BD241 T09 C~86ul 2018 01 17.47531 10 08 59.95 -01 30 23.2 24.6i 17BD241 T09 C~86ul 2018 01 17.53186 10 08 59.75 -01 30 22.7 24.5i 17BD241 T09 C~86ul 2018 01 17.55609 10 08 59.66 -01 30 22.0 24.5i 17BD241 T09 C~86ul 2018 01 17.58294 10 08 59.57 -01 30 22.0 24.4i 17BD241 T09 C~86ul 2018 12 13.640380 10 15 24.15 -01 33 40.1 17BD241 T09 C~86ul 2019 02 04.427442 10 12 56.06 -01 26 29.3 17BD241 T09 C~86ul
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 -0.00 0.00 0.07
2 0.0000 -1.02 0.04 -0.28 -0.14
3 0.0001 -2.95 -0.14 -0.27 -0.02
4 0.0001 -2.88 0.11 -0.45 -0.20
5 0.0002 -3.72 -0.03 -0.35 -0.05
6 0.0134 -321.16 -0.05 -13.62 0.12
7 0.0134 -321.94 0.23 -13.70 0.07
8 0.0135 -323.23 -0.02 -13.66 0.15
9 0.1636 -4041.83 -0.11 335.07 -0.07
10 0.1636 -4042.53 -0.10 335.23 -0.08
11 0.2459 -5247.34 -0.03 856.75 -0.12
12 0.2459 -5247.48 0.18 857.12 -0.04
13 0.9691 5008.59 -0.13 1608.61 0.21
14 0.9693 5005.61 0.03 1608.02 -0.01
15 0.9693 5004.10 -0.14 1608.19 0.33
16 0.9694 5002.83 0.09 1607.71 0.02
17 1.8731 10473.65 0.10 3470.96 -0.09
18 2.0176 8239.54 -0.02 3085.25 -0.16
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.
17BD241 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 45.632 45.716 45.550 ecceobj 0.157 0.161 0.153 incobj 23.011 23.009 23.013 qmin 37.919 37.776 37.839 qmax 53.602 53.851 53.469 amean 45.585 45.667 45.492 amin 45.211 45.280 45.113 amax 46.008 46.086 45.907 emean 0.151 0.155 0.153 emin 0.137 0.141 0.142 emax 0.166 0.169 0.165 imean 22.871 22.872 22.756 imin 22.492 22.501 22.466 imax 23.236 23.232 23.060 excite_mean 0.417 0.419 0.416 fracstop 1.000 1.000 1.000 cjmean 2.902 2.901 2.902 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 178.8 178.4 191.2 kozaiamp 180.0 180.0 180.0